ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 7 | |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 8 | #include "stdio.h" |
| 9 | #include "SkSLParser.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 10 | #include "ast/SkSLASTBinaryExpression.h" |
| 11 | #include "ast/SkSLASTBlock.h" |
| 12 | #include "ast/SkSLASTBoolLiteral.h" |
| 13 | #include "ast/SkSLASTBreakStatement.h" |
| 14 | #include "ast/SkSLASTCallSuffix.h" |
| 15 | #include "ast/SkSLASTContinueStatement.h" |
| 16 | #include "ast/SkSLASTDiscardStatement.h" |
| 17 | #include "ast/SkSLASTDoStatement.h" |
| 18 | #include "ast/SkSLASTExpression.h" |
| 19 | #include "ast/SkSLASTExpressionStatement.h" |
| 20 | #include "ast/SkSLASTExtension.h" |
| 21 | #include "ast/SkSLASTFieldSuffix.h" |
| 22 | #include "ast/SkSLASTFloatLiteral.h" |
| 23 | #include "ast/SkSLASTForStatement.h" |
| 24 | #include "ast/SkSLASTFunction.h" |
| 25 | #include "ast/SkSLASTIdentifier.h" |
| 26 | #include "ast/SkSLASTIfStatement.h" |
| 27 | #include "ast/SkSLASTIndexSuffix.h" |
| 28 | #include "ast/SkSLASTInterfaceBlock.h" |
| 29 | #include "ast/SkSLASTIntLiteral.h" |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 30 | #include "ast/SkSLASTModifiersDeclaration.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 31 | #include "ast/SkSLASTParameter.h" |
Brian Salomon | 1d816b9 | 2017-08-17 11:07:59 -0400 | [diff] [blame] | 32 | #include "ast/SkSLASTPrecision.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 33 | #include "ast/SkSLASTPrefixExpression.h" |
| 34 | #include "ast/SkSLASTReturnStatement.h" |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 35 | #include "ast/SkSLASTSection.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 36 | #include "ast/SkSLASTStatement.h" |
| 37 | #include "ast/SkSLASTSuffixExpression.h" |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 38 | #include "ast/SkSLASTSwitchCase.h" |
| 39 | #include "ast/SkSLASTSwitchStatement.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 40 | #include "ast/SkSLASTTernaryExpression.h" |
| 41 | #include "ast/SkSLASTType.h" |
| 42 | #include "ast/SkSLASTVarDeclaration.h" |
| 43 | #include "ast/SkSLASTVarDeclarationStatement.h" |
| 44 | #include "ast/SkSLASTWhileStatement.h" |
| 45 | #include "ir/SkSLSymbolTable.h" |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 46 | #include "ir/SkSLModifiers.h" |
ethannicholas | d598f79 | 2016-07-25 10:08:54 -0700 | [diff] [blame] | 47 | #include "ir/SkSLType.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 48 | |
| 49 | namespace SkSL { |
| 50 | |
ethannicholas | cad6416 | 2016-10-27 10:54:02 -0700 | [diff] [blame] | 51 | #define MAX_PARSE_DEPTH 50 |
| 52 | |
| 53 | class AutoDepth { |
| 54 | public: |
| 55 | AutoDepth(Parser* p) |
| 56 | : fParser(p) { |
| 57 | fParser->fDepth++; |
| 58 | } |
| 59 | |
| 60 | ~AutoDepth() { |
| 61 | fParser->fDepth--; |
| 62 | } |
| 63 | |
| 64 | bool checkValid() { |
| 65 | if (fParser->fDepth > MAX_PARSE_DEPTH) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 66 | fParser->error(fParser->peek(), String("exceeded max parse depth")); |
ethannicholas | cad6416 | 2016-10-27 10:54:02 -0700 | [diff] [blame] | 67 | return false; |
| 68 | } |
| 69 | return true; |
| 70 | } |
| 71 | |
| 72 | private: |
| 73 | Parser* fParser; |
| 74 | }; |
| 75 | |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 76 | Parser::Parser(const char* text, size_t length, SymbolTable& types, ErrorReporter& errors) |
| 77 | : fText(text) |
| 78 | , fPushback(Token::INVALID, -1, -1) |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 79 | , fTypes(types) |
| 80 | , fErrors(errors) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 81 | fLexer.start(text, length); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 82 | } |
| 83 | |
Brian Salomon | 1d816b9 | 2017-08-17 11:07:59 -0400 | [diff] [blame] | 84 | /* (precision | directive | section | declaration)* END_OF_FILE */ |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 85 | std::vector<std::unique_ptr<ASTDeclaration>> Parser::file() { |
| 86 | std::vector<std::unique_ptr<ASTDeclaration>> result; |
| 87 | for (;;) { |
| 88 | switch (this->peek().fKind) { |
| 89 | case Token::END_OF_FILE: |
| 90 | return result; |
Brian Salomon | 1d816b9 | 2017-08-17 11:07:59 -0400 | [diff] [blame] | 91 | case Token::PRECISION: { |
| 92 | std::unique_ptr<ASTDeclaration> precision = this->precision(); |
| 93 | if (precision) { |
| 94 | result.push_back(std::move(precision)); |
| 95 | } |
| 96 | break; |
| 97 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 98 | case Token::DIRECTIVE: { |
| 99 | std::unique_ptr<ASTDeclaration> decl = this->directive(); |
| 100 | if (decl) { |
| 101 | result.push_back(std::move(decl)); |
| 102 | } |
| 103 | break; |
| 104 | } |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 105 | case Token::SECTION: { |
| 106 | std::unique_ptr<ASTDeclaration> section = this->section(); |
| 107 | if (section) { |
| 108 | result.push_back(std::move(section)); |
| 109 | } |
| 110 | break; |
| 111 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 112 | default: { |
| 113 | std::unique_ptr<ASTDeclaration> decl = this->declaration(); |
| 114 | if (!decl) { |
| 115 | continue; |
| 116 | } |
| 117 | result.push_back(std::move(decl)); |
| 118 | } |
| 119 | } |
| 120 | } |
| 121 | } |
| 122 | |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 123 | Token Parser::nextRawToken() { |
| 124 | if (fPushback.fKind != Token::INVALID) { |
| 125 | Token result = fPushback; |
| 126 | fPushback.fKind = Token::INVALID; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 127 | return result; |
| 128 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 129 | Token result = fLexer.next(); |
| 130 | return result; |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | Token Parser::nextToken() { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 134 | Token token = this->nextRawToken(); |
| 135 | while (token.fKind == Token::WHITESPACE || token.fKind == Token::LINE_COMMENT || |
| 136 | token.fKind == Token::BLOCK_COMMENT) { |
| 137 | token = this->nextRawToken(); |
| 138 | } |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 139 | return token; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | void Parser::pushback(Token t) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 143 | ASSERT(fPushback.fKind == Token::INVALID); |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 144 | fPushback = std::move(t); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 145 | } |
| 146 | |
| 147 | Token Parser::peek() { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 148 | if (fPushback.fKind == Token::INVALID) { |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 149 | fPushback = this->nextToken(); |
| 150 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 151 | return fPushback; |
| 152 | } |
| 153 | |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 154 | bool Parser::checkNext(Token::Kind kind, Token* result) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 155 | if (fPushback.fKind != Token::INVALID && fPushback.fKind != kind) { |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 156 | return false; |
| 157 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 158 | Token next = this->nextToken(); |
| 159 | if (next.fKind == kind) { |
| 160 | if (result) { |
| 161 | *result = next; |
| 162 | } |
| 163 | return true; |
| 164 | } |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 165 | this->pushback(std::move(next)); |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 166 | return false; |
| 167 | } |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 168 | |
| 169 | bool Parser::expect(Token::Kind kind, const char* expected, Token* result) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 170 | Token next = this->nextToken(); |
| 171 | if (next.fKind == kind) { |
| 172 | if (result) { |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 173 | *result = std::move(next); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 174 | } |
| 175 | return true; |
| 176 | } else { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 177 | this->error(next, "expected " + String(expected) + ", but found '" + |
| 178 | this->text(next) + "'"); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 179 | return false; |
| 180 | } |
| 181 | } |
| 182 | |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 183 | StringFragment Parser::text(Token token) { |
| 184 | return StringFragment(fText + token.fOffset, token.fLength); |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 185 | } |
| 186 | |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 187 | void Parser::error(Token token, String msg) { |
| 188 | this->error(token.fOffset, msg); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 189 | } |
| 190 | |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 191 | void Parser::error(int offset, String msg) { |
| 192 | fErrors.error(offset, msg); |
| 193 | } |
| 194 | |
| 195 | bool Parser::isType(StringFragment name) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 196 | return nullptr != fTypes[name]; |
| 197 | } |
| 198 | |
Brian Salomon | 1d816b9 | 2017-08-17 11:07:59 -0400 | [diff] [blame] | 199 | /* PRECISION (LOWP | MEDIUMP | HIGHP) type SEMICOLON */ |
| 200 | std::unique_ptr<ASTDeclaration> Parser::precision() { |
| 201 | if (!this->expect(Token::PRECISION, "'precision'")) { |
| 202 | return nullptr; |
| 203 | } |
| 204 | Modifiers::Flag result; |
| 205 | Token p = this->nextToken(); |
| 206 | switch (p.fKind) { |
| 207 | case Token::LOWP: |
| 208 | result = Modifiers::kLowp_Flag; |
| 209 | break; |
| 210 | case Token::MEDIUMP: |
| 211 | result = Modifiers::kMediump_Flag; |
| 212 | break; |
| 213 | case Token::HIGHP: |
| 214 | result = Modifiers::kHighp_Flag; |
| 215 | break; |
| 216 | default: |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 217 | this->error(p, "expected 'lowp', 'mediump', or 'highp', but found '" + |
| 218 | this->text(p) + "'"); |
Brian Salomon | 1d816b9 | 2017-08-17 11:07:59 -0400 | [diff] [blame] | 219 | return nullptr; |
| 220 | } |
| 221 | // FIXME handle the type |
| 222 | if (!this->type()) { |
| 223 | return nullptr; |
| 224 | } |
| 225 | this->expect(Token::SEMICOLON, "';'"); |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 226 | return std::unique_ptr<ASTDeclaration>(new ASTPrecision(p.fOffset, result)); |
Brian Salomon | 1d816b9 | 2017-08-17 11:07:59 -0400 | [diff] [blame] | 227 | } |
| 228 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 229 | /* DIRECTIVE(#version) INT_LITERAL ("es" | "compatibility")? | |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 230 | DIRECTIVE(#extension) IDENTIFIER COLON IDENTIFIER */ |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 231 | std::unique_ptr<ASTDeclaration> Parser::directive() { |
| 232 | Token start; |
| 233 | if (!this->expect(Token::DIRECTIVE, "a directive", &start)) { |
| 234 | return nullptr; |
| 235 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 236 | StringFragment text = this->text(start); |
| 237 | if (text == "#version") { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 238 | this->expect(Token::INT_LITERAL, "a version number"); |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 239 | Token next = this->peek(); |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 240 | StringFragment nextText = this->text(next); |
| 241 | if (nextText == "es" || nextText == "compatibility") { |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 242 | this->nextToken(); |
| 243 | } |
| 244 | // version is ignored for now; it will eventually become an error when we stop pretending |
| 245 | // to be GLSL |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 246 | return nullptr; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 247 | } else if (text == "#extension") { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 248 | Token name; |
| 249 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 250 | return nullptr; |
| 251 | } |
| 252 | if (!this->expect(Token::COLON, "':'")) { |
| 253 | return nullptr; |
| 254 | } |
| 255 | // FIXME: need to start paying attention to this token |
| 256 | if (!this->expect(Token::IDENTIFIER, "an identifier")) { |
| 257 | return nullptr; |
| 258 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 259 | return std::unique_ptr<ASTDeclaration>(new ASTExtension(start.fOffset, |
| 260 | String(this->text(name)))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 261 | } else { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 262 | this->error(start, "unsupported directive '" + this->text(start) + "'"); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 263 | return nullptr; |
| 264 | } |
| 265 | } |
| 266 | |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 267 | /* SECTION LBRACE (LPAREN IDENTIFIER RPAREN)? <any sequence of tokens with balanced braces> |
| 268 | RBRACE */ |
| 269 | std::unique_ptr<ASTDeclaration> Parser::section() { |
| 270 | Token start; |
| 271 | if (!this->expect(Token::SECTION, "a section token", &start)) { |
| 272 | return nullptr; |
| 273 | } |
| 274 | String argument; |
| 275 | if (this->peek().fKind == Token::LPAREN) { |
| 276 | this->nextToken(); |
| 277 | Token argToken; |
| 278 | if (!this->expect(Token::IDENTIFIER, "an identifier", &argToken)) { |
| 279 | return nullptr; |
| 280 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 281 | argument = this->text(argToken); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 282 | if (!this->expect(Token::RPAREN, "')'")) { |
| 283 | return nullptr; |
| 284 | } |
| 285 | } |
| 286 | if (!this->expect(Token::LBRACE, "'{'")) { |
| 287 | return nullptr; |
| 288 | } |
| 289 | String text; |
| 290 | int level = 1; |
| 291 | for (;;) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 292 | Token next = this->nextRawToken(); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 293 | switch (next.fKind) { |
| 294 | case Token::LBRACE: |
| 295 | ++level; |
| 296 | break; |
| 297 | case Token::RBRACE: |
| 298 | --level; |
| 299 | break; |
| 300 | case Token::END_OF_FILE: |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 301 | this->error(start, "reached end of file while parsing section"); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 302 | return nullptr; |
| 303 | default: |
| 304 | break; |
| 305 | } |
| 306 | if (!level) { |
| 307 | break; |
| 308 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 309 | text += this->text(next); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 310 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 311 | StringFragment name = this->text(start); |
| 312 | ++name.fChars; |
| 313 | --name.fLength; |
| 314 | return std::unique_ptr<ASTDeclaration>(new ASTSection(start.fOffset, |
| 315 | String(name), |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 316 | argument, |
| 317 | text)); |
| 318 | } |
| 319 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 320 | /* modifiers (structVarDeclaration | type IDENTIFIER ((LPAREN parameter |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 321 | (COMMA parameter)* RPAREN (block | SEMICOLON)) | SEMICOLON) | interfaceBlock) */ |
| 322 | std::unique_ptr<ASTDeclaration> Parser::declaration() { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 323 | Modifiers modifiers = this->modifiers(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 324 | Token lookahead = this->peek(); |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 325 | if (lookahead.fKind == Token::IDENTIFIER && !this->isType(this->text(lookahead))) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 326 | // we have an identifier that's not a type, could be the start of an interface block |
| 327 | return this->interfaceBlock(modifiers); |
| 328 | } |
| 329 | if (lookahead.fKind == Token::STRUCT) { |
| 330 | return this->structVarDeclaration(modifiers); |
| 331 | } |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 332 | if (lookahead.fKind == Token::SEMICOLON) { |
| 333 | this->nextToken(); |
| 334 | return std::unique_ptr<ASTDeclaration>(new ASTModifiersDeclaration(modifiers)); |
| 335 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 336 | std::unique_ptr<ASTType> type(this->type()); |
| 337 | if (!type) { |
| 338 | return nullptr; |
| 339 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 340 | if (type->fKind == ASTType::kStruct_Kind && this->checkNext(Token::SEMICOLON)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 341 | return nullptr; |
| 342 | } |
| 343 | Token name; |
| 344 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 345 | return nullptr; |
| 346 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 347 | if (this->checkNext(Token::LPAREN)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 348 | std::vector<std::unique_ptr<ASTParameter>> parameters; |
| 349 | while (this->peek().fKind != Token::RPAREN) { |
| 350 | if (parameters.size() > 0) { |
| 351 | if (!this->expect(Token::COMMA, "','")) { |
| 352 | return nullptr; |
| 353 | } |
| 354 | } |
| 355 | std::unique_ptr<ASTParameter> parameter = this->parameter(); |
| 356 | if (!parameter) { |
| 357 | return nullptr; |
| 358 | } |
| 359 | parameters.push_back(std::move(parameter)); |
| 360 | } |
| 361 | this->nextToken(); |
| 362 | std::unique_ptr<ASTBlock> body; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 363 | if (!this->checkNext(Token::SEMICOLON)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 364 | body = this->block(); |
| 365 | if (!body) { |
| 366 | return nullptr; |
| 367 | } |
| 368 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 369 | return std::unique_ptr<ASTDeclaration>(new ASTFunction(name.fOffset, |
Ethan Nicholas | cb67096 | 2017-04-20 19:31:52 -0400 | [diff] [blame] | 370 | modifiers, |
| 371 | std::move(type), |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 372 | this->text(name), |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 373 | std::move(parameters), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 374 | std::move(body))); |
| 375 | } else { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 376 | return this->varDeclarationEnd(modifiers, std::move(type), this->text(name)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 377 | } |
| 378 | } |
| 379 | |
| 380 | /* modifiers type IDENTIFIER varDeclarationEnd */ |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 381 | std::unique_ptr<ASTVarDeclarations> Parser::varDeclarations() { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 382 | Modifiers modifiers = this->modifiers(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 383 | std::unique_ptr<ASTType> type(this->type()); |
| 384 | if (!type) { |
| 385 | return nullptr; |
| 386 | } |
| 387 | Token name; |
| 388 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 389 | return nullptr; |
| 390 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 391 | return this->varDeclarationEnd(modifiers, std::move(type), this->text(name)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 392 | } |
| 393 | |
| 394 | /* STRUCT IDENTIFIER LBRACE varDeclaration* RBRACE */ |
| 395 | std::unique_ptr<ASTType> Parser::structDeclaration() { |
| 396 | if (!this->expect(Token::STRUCT, "'struct'")) { |
| 397 | return nullptr; |
| 398 | } |
| 399 | Token name; |
| 400 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 401 | return nullptr; |
| 402 | } |
| 403 | if (!this->expect(Token::LBRACE, "'{'")) { |
| 404 | return nullptr; |
| 405 | } |
| 406 | std::vector<Type::Field> fields; |
| 407 | while (this->peek().fKind != Token::RBRACE) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 408 | std::unique_ptr<ASTVarDeclarations> decl = this->varDeclarations(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 409 | if (!decl) { |
| 410 | return nullptr; |
| 411 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 412 | for (const auto& var : decl->fVars) { |
ethannicholas | d598f79 | 2016-07-25 10:08:54 -0700 | [diff] [blame] | 413 | auto type = (const Type*) fTypes[decl->fType->fName]; |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 414 | for (int i = (int) var.fSizes.size() - 1; i >= 0; i--) { |
ethannicholas | dd4645b | 2016-10-14 12:14:46 -0700 | [diff] [blame] | 415 | if (!var.fSizes[i] || var.fSizes[i]->fKind != ASTExpression::kInt_Kind) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 416 | this->error(decl->fOffset, "array size in struct field must be a constant"); |
ethannicholas | dd4645b | 2016-10-14 12:14:46 -0700 | [diff] [blame] | 417 | return nullptr; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 418 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 419 | uint64_t columns = ((ASTIntLiteral&) *var.fSizes[i]).fValue; |
Ethan Nicholas | 0df1b04 | 2017-03-31 13:56:23 -0400 | [diff] [blame] | 420 | String name = type->name() + "[" + to_string(columns) + "]"; |
ethannicholas | d598f79 | 2016-07-25 10:08:54 -0700 | [diff] [blame] | 421 | type = new Type(name, Type::kArray_Kind, *type, (int) columns); |
| 422 | fTypes.takeOwnership((Type*) type); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 423 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 424 | fields.push_back(Type::Field(decl->fModifiers, var.fName, type)); |
| 425 | if (var.fValue) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 426 | this->error(decl->fOffset, "initializers are not permitted on struct fields"); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 427 | } |
| 428 | } |
| 429 | } |
| 430 | if (!this->expect(Token::RBRACE, "'}'")) { |
| 431 | return nullptr; |
| 432 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 433 | fTypes.add(this->text(name), std::unique_ptr<Type>(new Type(name.fOffset, this->text(name), |
| 434 | fields))); |
| 435 | return std::unique_ptr<ASTType>(new ASTType(name.fOffset, this->text(name), |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 436 | ASTType::kStruct_Kind, std::vector<int>())); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | /* structDeclaration ((IDENTIFIER varDeclarationEnd) | SEMICOLON) */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 440 | std::unique_ptr<ASTVarDeclarations> Parser::structVarDeclaration(Modifiers modifiers) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 441 | std::unique_ptr<ASTType> type = this->structDeclaration(); |
| 442 | if (!type) { |
| 443 | return nullptr; |
| 444 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 445 | Token name; |
| 446 | if (this->checkNext(Token::IDENTIFIER, &name)) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 447 | std::unique_ptr<ASTVarDeclarations> result = this->varDeclarationEnd(modifiers, |
| 448 | std::move(type), |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 449 | this->text(name)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 450 | if (result) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 451 | for (const auto& var : result->fVars) { |
| 452 | if (var.fValue) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 453 | this->error(var.fValue->fOffset, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 454 | "struct variables cannot be initialized"); |
| 455 | } |
| 456 | } |
| 457 | } |
| 458 | return result; |
| 459 | } |
| 460 | this->expect(Token::SEMICOLON, "';'"); |
| 461 | return nullptr; |
| 462 | } |
| 463 | |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 464 | /* (LBRACKET expression? RBRACKET)* (EQ assignmentExpression)? (COMMA IDENTIFER |
| 465 | (LBRACKET expression? RBRACKET)* (EQ assignmentExpression)?)* SEMICOLON */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 466 | std::unique_ptr<ASTVarDeclarations> Parser::varDeclarationEnd(Modifiers mods, |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 467 | std::unique_ptr<ASTType> type, |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 468 | StringFragment name) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 469 | std::vector<ASTVarDeclaration> vars; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 470 | std::vector<std::unique_ptr<ASTExpression>> currentVarSizes; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 471 | while (this->checkNext(Token::LBRACKET)) { |
| 472 | if (this->checkNext(Token::RBRACKET)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 473 | currentVarSizes.push_back(nullptr); |
| 474 | } else { |
| 475 | std::unique_ptr<ASTExpression> size(this->expression()); |
| 476 | if (!size) { |
| 477 | return nullptr; |
| 478 | } |
| 479 | currentVarSizes.push_back(std::move(size)); |
| 480 | if (!this->expect(Token::RBRACKET, "']'")) { |
| 481 | return nullptr; |
| 482 | } |
| 483 | } |
| 484 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 485 | std::unique_ptr<ASTExpression> value; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 486 | if (this->checkNext(Token::EQ)) { |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 487 | value = this->assignmentExpression(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 488 | if (!value) { |
| 489 | return nullptr; |
| 490 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 491 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 492 | vars.emplace_back(name, std::move(currentVarSizes), std::move(value)); |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 493 | while (this->checkNext(Token::COMMA)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 494 | Token name; |
| 495 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 496 | return nullptr; |
| 497 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 498 | currentVarSizes.clear(); |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 499 | value.reset(); |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 500 | while (this->checkNext(Token::LBRACKET)) { |
| 501 | if (this->checkNext(Token::RBRACKET)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 502 | currentVarSizes.push_back(nullptr); |
| 503 | } else { |
| 504 | std::unique_ptr<ASTExpression> size(this->expression()); |
| 505 | if (!size) { |
| 506 | return nullptr; |
| 507 | } |
| 508 | currentVarSizes.push_back(std::move(size)); |
| 509 | if (!this->expect(Token::RBRACKET, "']'")) { |
| 510 | return nullptr; |
| 511 | } |
| 512 | } |
| 513 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 514 | if (this->checkNext(Token::EQ)) { |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 515 | value = this->assignmentExpression(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 516 | if (!value) { |
| 517 | return nullptr; |
| 518 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 519 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 520 | vars.emplace_back(this->text(name), std::move(currentVarSizes), std::move(value)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 521 | } |
| 522 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 523 | return nullptr; |
| 524 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 525 | return std::unique_ptr<ASTVarDeclarations>(new ASTVarDeclarations(std::move(mods), |
| 526 | std::move(type), |
| 527 | std::move(vars))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | /* modifiers type IDENTIFIER (LBRACKET INT_LITERAL RBRACKET)? */ |
| 531 | std::unique_ptr<ASTParameter> Parser::parameter() { |
Ethan Nicholas | c6f5e10 | 2017-03-31 14:53:17 -0400 | [diff] [blame] | 532 | Modifiers modifiers = this->modifiersWithDefaults(0); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 533 | std::unique_ptr<ASTType> type = this->type(); |
| 534 | if (!type) { |
| 535 | return nullptr; |
| 536 | } |
| 537 | Token name; |
| 538 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 539 | return nullptr; |
| 540 | } |
| 541 | std::vector<int> sizes; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 542 | while (this->checkNext(Token::LBRACKET)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 543 | Token sizeToken; |
| 544 | if (!this->expect(Token::INT_LITERAL, "a positive integer", &sizeToken)) { |
| 545 | return nullptr; |
| 546 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 547 | sizes.push_back(SkSL::stoi(this->text(sizeToken))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 548 | if (!this->expect(Token::RBRACKET, "']'")) { |
| 549 | return nullptr; |
| 550 | } |
| 551 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 552 | return std::unique_ptr<ASTParameter>(new ASTParameter(name.fOffset, modifiers, std::move(type), |
| 553 | this->text(name), std::move(sizes))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 554 | } |
| 555 | |
| 556 | /** (EQ INT_LITERAL)? */ |
| 557 | int Parser::layoutInt() { |
| 558 | if (!this->expect(Token::EQ, "'='")) { |
| 559 | return -1; |
| 560 | } |
| 561 | Token resultToken; |
| 562 | if (this->expect(Token::INT_LITERAL, "a non-negative integer", &resultToken)) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 563 | return SkSL::stoi(this->text(resultToken)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 564 | } |
| 565 | return -1; |
| 566 | } |
| 567 | |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 568 | /** EQ <any sequence of tokens with balanced parentheses and no top-level comma> */ |
| 569 | String Parser::layoutCode() { |
| 570 | if (!this->expect(Token::EQ, "'='")) { |
| 571 | return ""; |
| 572 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 573 | Token start = this->nextRawToken(); |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 574 | this->pushback(start); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 575 | String code; |
| 576 | int level = 1; |
| 577 | bool done = false; |
| 578 | while (!done) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 579 | Token next = this->nextRawToken(); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 580 | switch (next.fKind) { |
| 581 | case Token::LPAREN: |
| 582 | ++level; |
| 583 | break; |
| 584 | case Token::RPAREN: |
| 585 | --level; |
| 586 | break; |
| 587 | case Token::COMMA: |
| 588 | if (level == 1) { |
| 589 | done = true; |
| 590 | } |
| 591 | break; |
| 592 | case Token::END_OF_FILE: |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 593 | this->error(start, "reached end of file while parsing layout"); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 594 | return nullptr; |
| 595 | default: |
| 596 | break; |
| 597 | } |
| 598 | if (!level) { |
| 599 | done = true; |
| 600 | } |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 601 | if (done) { |
| 602 | this->pushback(std::move(next)); |
| 603 | } |
| 604 | else { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 605 | code += this->text(next); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 606 | } |
| 607 | } |
| 608 | return code; |
| 609 | } |
| 610 | |
| 611 | /** (EQ IDENTIFIER('identity'))? */ |
| 612 | Layout::Key Parser::layoutKey() { |
| 613 | if (this->peek().fKind == Token::EQ) { |
| 614 | this->expect(Token::EQ, "'='"); |
| 615 | Token key; |
| 616 | if (this->expect(Token::IDENTIFIER, "an identifer", &key)) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 617 | if (this->text(key) == "identity") { |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 618 | return Layout::kIdentity_Key; |
| 619 | } else { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 620 | this->error(key, "unsupported layout key"); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 621 | } |
| 622 | } |
| 623 | } |
| 624 | return Layout::kKey_Key; |
| 625 | } |
| 626 | |
ethannicholas | 8ac838d | 2016-11-22 08:39:36 -0800 | [diff] [blame] | 627 | /* LAYOUT LPAREN IDENTIFIER (EQ INT_LITERAL)? (COMMA IDENTIFIER (EQ INT_LITERAL)?)* RPAREN */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 628 | Layout Parser::layout() { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 629 | int location = -1; |
Ethan Nicholas | 1967177 | 2016-11-28 16:30:17 -0500 | [diff] [blame] | 630 | int offset = -1; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 631 | int binding = -1; |
| 632 | int index = -1; |
| 633 | int set = -1; |
| 634 | int builtin = -1; |
Greg Daniel | 64773e6 | 2016-11-22 09:44:03 -0500 | [diff] [blame] | 635 | int inputAttachmentIndex = -1; |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 636 | bool originUpperLeft = false; |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 637 | bool overrideCoverage = false; |
| 638 | bool blendSupportAllEquations = false; |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 639 | Layout::Format format = Layout::Format::kUnspecified; |
ethannicholas | 8ac838d | 2016-11-22 08:39:36 -0800 | [diff] [blame] | 640 | bool pushConstant = false; |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 641 | Layout::Primitive primitive = Layout::kUnspecified_Primitive; |
| 642 | int maxVertices = -1; |
| 643 | int invocations = -1; |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 644 | String when; |
| 645 | Layout::Key key = Layout::kNo_Key; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 646 | if (this->checkNext(Token::LAYOUT)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 647 | if (!this->expect(Token::LPAREN, "'('")) { |
Ethan Nicholas | 1967177 | 2016-11-28 16:30:17 -0500 | [diff] [blame] | 648 | return Layout(location, offset, binding, index, set, builtin, inputAttachmentIndex, |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 649 | originUpperLeft, overrideCoverage, blendSupportAllEquations, format, |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 650 | pushConstant, primitive, maxVertices, invocations, when, key); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 651 | } |
| 652 | for (;;) { |
| 653 | Token t = this->nextToken(); |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 654 | String text = this->text(t); |
| 655 | fLayoutLexer.start(text.c_str(), text.size()); |
| 656 | int token = fLayoutLexer.next().fKind; |
| 657 | if (token != LayoutToken::INVALID) { |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 658 | switch (token) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 659 | case LayoutToken::LOCATION: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 660 | location = this->layoutInt(); |
| 661 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 662 | case LayoutToken::OFFSET: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 663 | offset = this->layoutInt(); |
| 664 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 665 | case LayoutToken::BINDING: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 666 | binding = this->layoutInt(); |
| 667 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 668 | case LayoutToken::INDEX: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 669 | index = this->layoutInt(); |
| 670 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 671 | case LayoutToken::SET: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 672 | set = this->layoutInt(); |
| 673 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 674 | case LayoutToken::BUILTIN: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 675 | builtin = this->layoutInt(); |
| 676 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 677 | case LayoutToken::INPUT_ATTACHMENT_INDEX: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 678 | inputAttachmentIndex = this->layoutInt(); |
| 679 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 680 | case LayoutToken::ORIGIN_UPPER_LEFT: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 681 | originUpperLeft = true; |
| 682 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 683 | case LayoutToken::OVERRIDE_COVERAGE: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 684 | overrideCoverage = true; |
| 685 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 686 | case LayoutToken::BLEND_SUPPORT_ALL_EQUATIONS: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 687 | blendSupportAllEquations = true; |
| 688 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 689 | case LayoutToken::PUSH_CONSTANT: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 690 | pushConstant = true; |
| 691 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 692 | case LayoutToken::POINTS: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 693 | primitive = Layout::kPoints_Primitive; |
| 694 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 695 | case LayoutToken::LINES: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 696 | primitive = Layout::kLines_Primitive; |
| 697 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 698 | case LayoutToken::LINE_STRIP: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 699 | primitive = Layout::kLineStrip_Primitive; |
| 700 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 701 | case LayoutToken::LINES_ADJACENCY: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 702 | primitive = Layout::kLinesAdjacency_Primitive; |
| 703 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 704 | case LayoutToken::TRIANGLES: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 705 | primitive = Layout::kTriangles_Primitive; |
| 706 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 707 | case LayoutToken::TRIANGLE_STRIP: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 708 | primitive = Layout::kTriangleStrip_Primitive; |
| 709 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 710 | case LayoutToken::TRIANGLES_ADJACENCY: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 711 | primitive = Layout::kTrianglesAdjacency_Primitive; |
| 712 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 713 | case LayoutToken::MAX_VERTICES: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 714 | maxVertices = this->layoutInt(); |
| 715 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 716 | case LayoutToken::INVOCATIONS: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 717 | invocations = this->layoutInt(); |
| 718 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 719 | case LayoutToken::WHEN: |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 720 | when = this->layoutCode(); |
| 721 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 722 | case LayoutToken::KEY: |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 723 | key = this->layoutKey(); |
| 724 | break; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 725 | default: |
| 726 | ASSERT(false); |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 727 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 728 | } else if (Layout::ReadFormat(this->text(t), &format)) { |
Brian Salomon | 2a51de8 | 2016-11-16 12:06:01 -0500 | [diff] [blame] | 729 | // AST::ReadFormat stored the result in 'format'. |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 730 | } else { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 731 | this->error(t, ("'" + this->text(t) + "' is not a valid layout qualifier").c_str()); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 732 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 733 | if (this->checkNext(Token::RPAREN)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 734 | break; |
| 735 | } |
| 736 | if (!this->expect(Token::COMMA, "','")) { |
| 737 | break; |
| 738 | } |
| 739 | } |
| 740 | } |
Ethan Nicholas | 1967177 | 2016-11-28 16:30:17 -0500 | [diff] [blame] | 741 | return Layout(location, offset, binding, index, set, builtin, inputAttachmentIndex, |
| 742 | originUpperLeft, overrideCoverage, blendSupportAllEquations, format, |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 743 | pushConstant, primitive, maxVertices, invocations, when, key); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 744 | } |
| 745 | |
Brian Salomon | f9f4512 | 2016-11-29 11:59:17 -0500 | [diff] [blame] | 746 | /* layout? (UNIFORM | CONST | IN | OUT | INOUT | LOWP | MEDIUMP | HIGHP | FLAT | NOPERSPECTIVE | |
Ethan Nicholas | 0dd30d9 | 2017-05-01 16:57:07 -0400 | [diff] [blame] | 747 | READONLY | WRITEONLY | COHERENT | VOLATILE | RESTRICT | BUFFER)* */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 748 | Modifiers Parser::modifiers() { |
| 749 | Layout layout = this->layout(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 750 | int flags = 0; |
| 751 | for (;;) { |
| 752 | // TODO: handle duplicate / incompatible flags |
| 753 | switch (peek().fKind) { |
| 754 | case Token::UNIFORM: |
| 755 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 756 | flags |= Modifiers::kUniform_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 757 | break; |
| 758 | case Token::CONST: |
| 759 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 760 | flags |= Modifiers::kConst_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 761 | break; |
| 762 | case Token::IN: |
| 763 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 764 | flags |= Modifiers::kIn_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 765 | break; |
| 766 | case Token::OUT: |
| 767 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 768 | flags |= Modifiers::kOut_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 769 | break; |
| 770 | case Token::INOUT: |
| 771 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 772 | flags |= Modifiers::kIn_Flag; |
| 773 | flags |= Modifiers::kOut_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 774 | break; |
| 775 | case Token::LOWP: |
| 776 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 777 | flags |= Modifiers::kLowp_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 778 | break; |
| 779 | case Token::MEDIUMP: |
| 780 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 781 | flags |= Modifiers::kMediump_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 782 | break; |
| 783 | case Token::HIGHP: |
| 784 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 785 | flags |= Modifiers::kHighp_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 786 | break; |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 787 | case Token::FLAT: |
| 788 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 789 | flags |= Modifiers::kFlat_Flag; |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 790 | break; |
| 791 | case Token::NOPERSPECTIVE: |
| 792 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 793 | flags |= Modifiers::kNoPerspective_Flag; |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 794 | break; |
Brian Salomon | f9f4512 | 2016-11-29 11:59:17 -0500 | [diff] [blame] | 795 | case Token::READONLY: |
| 796 | this->nextToken(); |
| 797 | flags |= Modifiers::kReadOnly_Flag; |
| 798 | break; |
| 799 | case Token::WRITEONLY: |
| 800 | this->nextToken(); |
| 801 | flags |= Modifiers::kWriteOnly_Flag; |
| 802 | break; |
| 803 | case Token::COHERENT: |
| 804 | this->nextToken(); |
| 805 | flags |= Modifiers::kCoherent_Flag; |
| 806 | break; |
| 807 | case Token::VOLATILE: |
| 808 | this->nextToken(); |
| 809 | flags |= Modifiers::kVolatile_Flag; |
| 810 | break; |
| 811 | case Token::RESTRICT: |
| 812 | this->nextToken(); |
| 813 | flags |= Modifiers::kRestrict_Flag; |
| 814 | break; |
Ethan Nicholas | 0dd30d9 | 2017-05-01 16:57:07 -0400 | [diff] [blame] | 815 | case Token::BUFFER: |
| 816 | this->nextToken(); |
| 817 | flags |= Modifiers::kBuffer_Flag; |
| 818 | break; |
Ethan Nicholas | cb67096 | 2017-04-20 19:31:52 -0400 | [diff] [blame] | 819 | case Token::HASSIDEEFFECTS: |
| 820 | this->nextToken(); |
| 821 | flags |= Modifiers::kHasSideEffects_Flag; |
| 822 | break; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 823 | default: |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 824 | return Modifiers(layout, flags); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 825 | } |
| 826 | } |
| 827 | } |
| 828 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 829 | Modifiers Parser::modifiersWithDefaults(int defaultFlags) { |
| 830 | Modifiers result = this->modifiers(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 831 | if (!result.fFlags) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 832 | return Modifiers(result.fLayout, defaultFlags); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 833 | } |
| 834 | return result; |
| 835 | } |
| 836 | |
| 837 | /* ifStatement | forStatement | doStatement | whileStatement | block | expression */ |
| 838 | std::unique_ptr<ASTStatement> Parser::statement() { |
| 839 | Token start = this->peek(); |
| 840 | switch (start.fKind) { |
Ethan Nicholas | 5ac13c2 | 2017-05-10 15:06:17 -0400 | [diff] [blame] | 841 | case Token::IF: // fall through |
| 842 | case Token::STATIC_IF: |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 843 | return this->ifStatement(); |
| 844 | case Token::FOR: |
| 845 | return this->forStatement(); |
| 846 | case Token::DO: |
| 847 | return this->doStatement(); |
| 848 | case Token::WHILE: |
| 849 | return this->whileStatement(); |
Ethan Nicholas | 5ac13c2 | 2017-05-10 15:06:17 -0400 | [diff] [blame] | 850 | case Token::SWITCH: // fall through |
| 851 | case Token::STATIC_SWITCH: |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 852 | return this->switchStatement(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 853 | case Token::RETURN: |
| 854 | return this->returnStatement(); |
| 855 | case Token::BREAK: |
| 856 | return this->breakStatement(); |
| 857 | case Token::CONTINUE: |
| 858 | return this->continueStatement(); |
| 859 | case Token::DISCARD: |
| 860 | return this->discardStatement(); |
| 861 | case Token::LBRACE: |
| 862 | return this->block(); |
| 863 | case Token::SEMICOLON: |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 864 | this->nextToken(); |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 865 | return std::unique_ptr<ASTStatement>(new ASTBlock(start.fOffset, |
ethannicholas | 0730be7 | 2016-09-01 07:59:02 -0700 | [diff] [blame] | 866 | std::vector<std::unique_ptr<ASTStatement>>())); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 867 | case Token::CONST: // fall through |
| 868 | case Token::HIGHP: // fall through |
| 869 | case Token::MEDIUMP: // fall through |
| 870 | case Token::LOWP: { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 871 | auto decl = this->varDeclarations(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 872 | if (!decl) { |
| 873 | return nullptr; |
| 874 | } |
| 875 | return std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement(std::move(decl))); |
| 876 | } |
| 877 | case Token::IDENTIFIER: |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 878 | if (this->isType(this->text(start))) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 879 | auto decl = this->varDeclarations(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 880 | if (!decl) { |
| 881 | return nullptr; |
| 882 | } |
| 883 | return std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement( |
| 884 | std::move(decl))); |
| 885 | } |
| 886 | // fall through |
| 887 | default: |
| 888 | return this->expressionStatement(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 889 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 890 | } |
| 891 | |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 892 | /* IDENTIFIER(type) (LBRACKET intLiteral? RBRACKET)* */ |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 893 | std::unique_ptr<ASTType> Parser::type() { |
| 894 | Token type; |
| 895 | if (!this->expect(Token::IDENTIFIER, "a type", &type)) { |
| 896 | return nullptr; |
| 897 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 898 | if (!this->isType(this->text(type))) { |
| 899 | this->error(type, ("no type named '" + this->text(type) + "'").c_str()); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 900 | return nullptr; |
| 901 | } |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 902 | std::vector<int> sizes; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 903 | while (this->checkNext(Token::LBRACKET)) { |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 904 | if (this->peek().fKind != Token::RBRACKET) { |
| 905 | int64_t i; |
| 906 | if (this->intLiteral(&i)) { |
| 907 | sizes.push_back(i); |
| 908 | } else { |
| 909 | return nullptr; |
| 910 | } |
| 911 | } else { |
| 912 | sizes.push_back(-1); |
| 913 | } |
| 914 | this->expect(Token::RBRACKET, "']'"); |
| 915 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 916 | return std::unique_ptr<ASTType>(new ASTType(type.fOffset, this->text(type), |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 917 | ASTType::kIdentifier_Kind, sizes)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 918 | } |
| 919 | |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 920 | /* IDENTIFIER LBRACE varDeclaration* RBRACE (IDENTIFIER (LBRACKET expression? RBRACKET)*)? */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 921 | std::unique_ptr<ASTDeclaration> Parser::interfaceBlock(Modifiers mods) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 922 | Token name; |
| 923 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 924 | return nullptr; |
| 925 | } |
| 926 | if (peek().fKind != Token::LBRACE) { |
| 927 | // we only get into interfaceBlock if we found a top-level identifier which was not a type. |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 928 | // 99% of the time, the user was not actually intending to create an interface block, so |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 929 | // it's better to report it as an unknown type |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 930 | this->error(name, "no type named '" + this->text(name) + "'"); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 931 | return nullptr; |
| 932 | } |
| 933 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 934 | std::vector<std::unique_ptr<ASTVarDeclarations>> decls; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 935 | while (this->peek().fKind != Token::RBRACE) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 936 | std::unique_ptr<ASTVarDeclarations> decl = this->varDeclarations(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 937 | if (!decl) { |
| 938 | return nullptr; |
| 939 | } |
| 940 | decls.push_back(std::move(decl)); |
| 941 | } |
| 942 | this->nextToken(); |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 943 | std::vector<std::unique_ptr<ASTExpression>> sizes; |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 944 | StringFragment instanceName; |
| 945 | Token instanceNameToken; |
| 946 | if (this->checkNext(Token::IDENTIFIER, &instanceNameToken)) { |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 947 | while (this->checkNext(Token::LBRACKET)) { |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 948 | if (this->peek().fKind != Token::RBRACKET) { |
| 949 | std::unique_ptr<ASTExpression> size = this->expression(); |
| 950 | if (!size) { |
| 951 | return nullptr; |
| 952 | } |
| 953 | sizes.push_back(std::move(size)); |
| 954 | } else { |
| 955 | sizes.push_back(nullptr); |
| 956 | } |
| 957 | this->expect(Token::RBRACKET, "']'"); |
| 958 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 959 | instanceName = this->text(instanceNameToken); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 960 | } |
| 961 | this->expect(Token::SEMICOLON, "';'"); |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 962 | return std::unique_ptr<ASTDeclaration>(new ASTInterfaceBlock(name.fOffset, mods, |
| 963 | this->text(name), |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 964 | std::move(decls), |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 965 | instanceName, |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 966 | std::move(sizes))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 967 | } |
| 968 | |
| 969 | /* IF LPAREN expression RPAREN statement (ELSE statement)? */ |
| 970 | std::unique_ptr<ASTIfStatement> Parser::ifStatement() { |
| 971 | Token start; |
Ethan Nicholas | 5ac13c2 | 2017-05-10 15:06:17 -0400 | [diff] [blame] | 972 | bool isStatic = this->checkNext(Token::STATIC_IF, &start); |
| 973 | if (!isStatic && !this->expect(Token::IF, "'if'", &start)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 974 | return nullptr; |
| 975 | } |
| 976 | if (!this->expect(Token::LPAREN, "'('")) { |
| 977 | return nullptr; |
| 978 | } |
| 979 | std::unique_ptr<ASTExpression> test(this->expression()); |
| 980 | if (!test) { |
| 981 | return nullptr; |
| 982 | } |
| 983 | if (!this->expect(Token::RPAREN, "')'")) { |
| 984 | return nullptr; |
| 985 | } |
| 986 | std::unique_ptr<ASTStatement> ifTrue(this->statement()); |
| 987 | if (!ifTrue) { |
| 988 | return nullptr; |
| 989 | } |
| 990 | std::unique_ptr<ASTStatement> ifFalse; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 991 | if (this->checkNext(Token::ELSE)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 992 | ifFalse = this->statement(); |
| 993 | if (!ifFalse) { |
| 994 | return nullptr; |
| 995 | } |
| 996 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 997 | return std::unique_ptr<ASTIfStatement>(new ASTIfStatement(start.fOffset, |
Ethan Nicholas | 5ac13c2 | 2017-05-10 15:06:17 -0400 | [diff] [blame] | 998 | isStatic, |
| 999 | std::move(test), |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1000 | std::move(ifTrue), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1001 | std::move(ifFalse))); |
| 1002 | } |
| 1003 | |
| 1004 | /* DO statement WHILE LPAREN expression RPAREN SEMICOLON */ |
| 1005 | std::unique_ptr<ASTDoStatement> Parser::doStatement() { |
| 1006 | Token start; |
| 1007 | if (!this->expect(Token::DO, "'do'", &start)) { |
| 1008 | return nullptr; |
| 1009 | } |
| 1010 | std::unique_ptr<ASTStatement> statement(this->statement()); |
| 1011 | if (!statement) { |
| 1012 | return nullptr; |
| 1013 | } |
| 1014 | if (!this->expect(Token::WHILE, "'while'")) { |
| 1015 | return nullptr; |
| 1016 | } |
| 1017 | if (!this->expect(Token::LPAREN, "'('")) { |
| 1018 | return nullptr; |
| 1019 | } |
| 1020 | std::unique_ptr<ASTExpression> test(this->expression()); |
| 1021 | if (!test) { |
| 1022 | return nullptr; |
| 1023 | } |
| 1024 | if (!this->expect(Token::RPAREN, "')'")) { |
| 1025 | return nullptr; |
| 1026 | } |
| 1027 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1028 | return nullptr; |
| 1029 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1030 | return std::unique_ptr<ASTDoStatement>(new ASTDoStatement(start.fOffset, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1031 | std::move(statement), |
| 1032 | std::move(test))); |
| 1033 | } |
| 1034 | |
| 1035 | /* WHILE LPAREN expression RPAREN STATEMENT */ |
| 1036 | std::unique_ptr<ASTWhileStatement> Parser::whileStatement() { |
| 1037 | Token start; |
| 1038 | if (!this->expect(Token::WHILE, "'while'", &start)) { |
| 1039 | return nullptr; |
| 1040 | } |
| 1041 | if (!this->expect(Token::LPAREN, "'('")) { |
| 1042 | return nullptr; |
| 1043 | } |
| 1044 | std::unique_ptr<ASTExpression> test(this->expression()); |
| 1045 | if (!test) { |
| 1046 | return nullptr; |
| 1047 | } |
| 1048 | if (!this->expect(Token::RPAREN, "')'")) { |
| 1049 | return nullptr; |
| 1050 | } |
| 1051 | std::unique_ptr<ASTStatement> statement(this->statement()); |
| 1052 | if (!statement) { |
| 1053 | return nullptr; |
| 1054 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1055 | return std::unique_ptr<ASTWhileStatement>(new ASTWhileStatement(start.fOffset, |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1056 | std::move(test), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1057 | std::move(statement))); |
| 1058 | } |
| 1059 | |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 1060 | /* CASE expression COLON statement* */ |
| 1061 | std::unique_ptr<ASTSwitchCase> Parser::switchCase() { |
| 1062 | Token start; |
| 1063 | if (!this->expect(Token::CASE, "'case'", &start)) { |
| 1064 | return nullptr; |
| 1065 | } |
| 1066 | std::unique_ptr<ASTExpression> value = this->expression(); |
| 1067 | if (!value) { |
| 1068 | return nullptr; |
| 1069 | } |
| 1070 | if (!this->expect(Token::COLON, "':'")) { |
| 1071 | return nullptr; |
| 1072 | } |
| 1073 | std::vector<std::unique_ptr<ASTStatement>> statements; |
| 1074 | while (this->peek().fKind != Token::RBRACE && this->peek().fKind != Token::CASE && |
| 1075 | this->peek().fKind != Token::DEFAULT) { |
| 1076 | std::unique_ptr<ASTStatement> s = this->statement(); |
| 1077 | if (!s) { |
| 1078 | return nullptr; |
| 1079 | } |
| 1080 | statements.push_back(std::move(s)); |
| 1081 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1082 | return std::unique_ptr<ASTSwitchCase>(new ASTSwitchCase(start.fOffset, std::move(value), |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 1083 | std::move(statements))); |
| 1084 | } |
| 1085 | |
| 1086 | /* SWITCH LPAREN expression RPAREN LBRACE switchCase* (DEFAULT COLON statement*)? RBRACE */ |
| 1087 | std::unique_ptr<ASTStatement> Parser::switchStatement() { |
| 1088 | Token start; |
Ethan Nicholas | 5ac13c2 | 2017-05-10 15:06:17 -0400 | [diff] [blame] | 1089 | bool isStatic = this->checkNext(Token::STATIC_SWITCH, &start); |
| 1090 | if (!isStatic && !this->expect(Token::SWITCH, "'switch'", &start)) { |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 1091 | return nullptr; |
| 1092 | } |
| 1093 | if (!this->expect(Token::LPAREN, "'('")) { |
| 1094 | return nullptr; |
| 1095 | } |
| 1096 | std::unique_ptr<ASTExpression> value(this->expression()); |
| 1097 | if (!value) { |
| 1098 | return nullptr; |
| 1099 | } |
| 1100 | if (!this->expect(Token::RPAREN, "')'")) { |
| 1101 | return nullptr; |
| 1102 | } |
| 1103 | if (!this->expect(Token::LBRACE, "'{'")) { |
| 1104 | return nullptr; |
| 1105 | } |
| 1106 | std::vector<std::unique_ptr<ASTSwitchCase>> cases; |
| 1107 | while (this->peek().fKind == Token::CASE) { |
| 1108 | std::unique_ptr<ASTSwitchCase> c = this->switchCase(); |
| 1109 | if (!c) { |
| 1110 | return nullptr; |
| 1111 | } |
| 1112 | cases.push_back(std::move(c)); |
| 1113 | } |
| 1114 | // Requiring default: to be last (in defiance of C and GLSL) was a deliberate decision. Other |
| 1115 | // parts of the compiler may rely upon this assumption. |
| 1116 | if (this->peek().fKind == Token::DEFAULT) { |
| 1117 | Token defaultStart; |
Ethan Nicholas | 0df1b04 | 2017-03-31 13:56:23 -0400 | [diff] [blame] | 1118 | ASSERT_RESULT(this->expect(Token::DEFAULT, "'default'", &defaultStart)); |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 1119 | if (!this->expect(Token::COLON, "':'")) { |
| 1120 | return nullptr; |
| 1121 | } |
| 1122 | std::vector<std::unique_ptr<ASTStatement>> statements; |
| 1123 | while (this->peek().fKind != Token::RBRACE) { |
| 1124 | std::unique_ptr<ASTStatement> s = this->statement(); |
| 1125 | if (!s) { |
| 1126 | return nullptr; |
| 1127 | } |
| 1128 | statements.push_back(std::move(s)); |
| 1129 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1130 | cases.emplace_back(new ASTSwitchCase(defaultStart.fOffset, nullptr, |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 1131 | std::move(statements))); |
| 1132 | } |
| 1133 | if (!this->expect(Token::RBRACE, "'}'")) { |
| 1134 | return nullptr; |
| 1135 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1136 | return std::unique_ptr<ASTStatement>(new ASTSwitchStatement(start.fOffset, |
Ethan Nicholas | 5ac13c2 | 2017-05-10 15:06:17 -0400 | [diff] [blame] | 1137 | isStatic, |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 1138 | std::move(value), |
| 1139 | std::move(cases))); |
| 1140 | } |
| 1141 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1142 | /* FOR LPAREN (declaration | expression)? SEMICOLON expression? SEMICOLON expression? RPAREN |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1143 | STATEMENT */ |
| 1144 | std::unique_ptr<ASTForStatement> Parser::forStatement() { |
| 1145 | Token start; |
| 1146 | if (!this->expect(Token::FOR, "'for'", &start)) { |
| 1147 | return nullptr; |
| 1148 | } |
| 1149 | if (!this->expect(Token::LPAREN, "'('")) { |
| 1150 | return nullptr; |
| 1151 | } |
| 1152 | std::unique_ptr<ASTStatement> initializer; |
| 1153 | Token nextToken = this->peek(); |
| 1154 | switch (nextToken.fKind) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1155 | case Token::SEMICOLON: |
ethannicholas | 22f939e | 2016-10-13 13:25:34 -0700 | [diff] [blame] | 1156 | this->nextToken(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1157 | break; |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1158 | case Token::CONST: { |
| 1159 | std::unique_ptr<ASTVarDeclarations> vd = this->varDeclarations(); |
| 1160 | if (!vd) { |
| 1161 | return nullptr; |
| 1162 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1163 | initializer = std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement( |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1164 | std::move(vd))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1165 | break; |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1166 | } |
| 1167 | case Token::IDENTIFIER: { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1168 | if (this->isType(this->text(nextToken))) { |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1169 | std::unique_ptr<ASTVarDeclarations> vd = this->varDeclarations(); |
| 1170 | if (!vd) { |
| 1171 | return nullptr; |
| 1172 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1173 | initializer = std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement( |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1174 | std::move(vd))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1175 | break; |
| 1176 | } |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1177 | } // fall through |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1178 | default: |
| 1179 | initializer = this->expressionStatement(); |
| 1180 | } |
| 1181 | std::unique_ptr<ASTExpression> test; |
| 1182 | if (this->peek().fKind != Token::SEMICOLON) { |
| 1183 | test = this->expression(); |
| 1184 | if (!test) { |
| 1185 | return nullptr; |
| 1186 | } |
| 1187 | } |
| 1188 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1189 | return nullptr; |
| 1190 | } |
| 1191 | std::unique_ptr<ASTExpression> next; |
ethannicholas | 22f939e | 2016-10-13 13:25:34 -0700 | [diff] [blame] | 1192 | if (this->peek().fKind != Token::RPAREN) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1193 | next = this->expression(); |
| 1194 | if (!next) { |
| 1195 | return nullptr; |
| 1196 | } |
| 1197 | } |
| 1198 | if (!this->expect(Token::RPAREN, "')'")) { |
| 1199 | return nullptr; |
| 1200 | } |
| 1201 | std::unique_ptr<ASTStatement> statement(this->statement()); |
| 1202 | if (!statement) { |
| 1203 | return nullptr; |
| 1204 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1205 | return std::unique_ptr<ASTForStatement>(new ASTForStatement(start.fOffset, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1206 | std::move(initializer), |
| 1207 | std::move(test), std::move(next), |
| 1208 | std::move(statement))); |
| 1209 | } |
| 1210 | |
| 1211 | /* RETURN expression? SEMICOLON */ |
| 1212 | std::unique_ptr<ASTReturnStatement> Parser::returnStatement() { |
| 1213 | Token start; |
| 1214 | if (!this->expect(Token::RETURN, "'return'", &start)) { |
| 1215 | return nullptr; |
| 1216 | } |
| 1217 | std::unique_ptr<ASTExpression> expression; |
| 1218 | if (this->peek().fKind != Token::SEMICOLON) { |
| 1219 | expression = this->expression(); |
| 1220 | if (!expression) { |
| 1221 | return nullptr; |
| 1222 | } |
| 1223 | } |
| 1224 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1225 | return nullptr; |
| 1226 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1227 | return std::unique_ptr<ASTReturnStatement>(new ASTReturnStatement(start.fOffset, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1228 | std::move(expression))); |
| 1229 | } |
| 1230 | |
| 1231 | /* BREAK SEMICOLON */ |
| 1232 | std::unique_ptr<ASTBreakStatement> Parser::breakStatement() { |
| 1233 | Token start; |
| 1234 | if (!this->expect(Token::BREAK, "'break'", &start)) { |
| 1235 | return nullptr; |
| 1236 | } |
| 1237 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1238 | return nullptr; |
| 1239 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1240 | return std::unique_ptr<ASTBreakStatement>(new ASTBreakStatement(start.fOffset)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1241 | } |
| 1242 | |
| 1243 | /* CONTINUE SEMICOLON */ |
| 1244 | std::unique_ptr<ASTContinueStatement> Parser::continueStatement() { |
| 1245 | Token start; |
| 1246 | if (!this->expect(Token::CONTINUE, "'continue'", &start)) { |
| 1247 | return nullptr; |
| 1248 | } |
| 1249 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1250 | return nullptr; |
| 1251 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1252 | return std::unique_ptr<ASTContinueStatement>(new ASTContinueStatement(start.fOffset)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1253 | } |
| 1254 | |
| 1255 | /* DISCARD SEMICOLON */ |
| 1256 | std::unique_ptr<ASTDiscardStatement> Parser::discardStatement() { |
| 1257 | Token start; |
| 1258 | if (!this->expect(Token::DISCARD, "'continue'", &start)) { |
| 1259 | return nullptr; |
| 1260 | } |
| 1261 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1262 | return nullptr; |
| 1263 | } |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1264 | return std::unique_ptr<ASTDiscardStatement>(new ASTDiscardStatement(start.fOffset)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1265 | } |
| 1266 | |
| 1267 | /* LBRACE statement* RBRACE */ |
| 1268 | std::unique_ptr<ASTBlock> Parser::block() { |
ethannicholas | cad6416 | 2016-10-27 10:54:02 -0700 | [diff] [blame] | 1269 | AutoDepth depth(this); |
| 1270 | if (!depth.checkValid()) { |
| 1271 | return nullptr; |
| 1272 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1273 | Token start; |
| 1274 | if (!this->expect(Token::LBRACE, "'{'", &start)) { |
| 1275 | return nullptr; |
| 1276 | } |
| 1277 | std::vector<std::unique_ptr<ASTStatement>> statements; |
| 1278 | for (;;) { |
| 1279 | switch (this->peek().fKind) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1280 | case Token::RBRACE: |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1281 | this->nextToken(); |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1282 | return std::unique_ptr<ASTBlock>(new ASTBlock(start.fOffset, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1283 | std::move(statements))); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1284 | case Token::END_OF_FILE: |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1285 | this->error(this->peek(), "expected '}', but found end of file"); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1286 | return nullptr; |
| 1287 | default: { |
| 1288 | std::unique_ptr<ASTStatement> statement = this->statement(); |
| 1289 | if (!statement) { |
| 1290 | return nullptr; |
| 1291 | } |
| 1292 | statements.push_back(std::move(statement)); |
| 1293 | } |
| 1294 | } |
| 1295 | } |
| 1296 | } |
| 1297 | |
| 1298 | /* expression SEMICOLON */ |
| 1299 | std::unique_ptr<ASTExpressionStatement> Parser::expressionStatement() { |
| 1300 | std::unique_ptr<ASTExpression> expr = this->expression(); |
| 1301 | if (expr) { |
| 1302 | if (this->expect(Token::SEMICOLON, "';'")) { |
| 1303 | ASTExpressionStatement* result = new ASTExpressionStatement(std::move(expr)); |
| 1304 | return std::unique_ptr<ASTExpressionStatement>(result); |
| 1305 | } |
| 1306 | } |
| 1307 | return nullptr; |
| 1308 | } |
| 1309 | |
| 1310 | /* assignmentExpression */ |
| 1311 | std::unique_ptr<ASTExpression> Parser::expression() { |
ethannicholas | cad6416 | 2016-10-27 10:54:02 -0700 | [diff] [blame] | 1312 | AutoDepth depth(this); |
| 1313 | if (!depth.checkValid()) { |
| 1314 | return nullptr; |
| 1315 | } |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 1316 | return this->commaExpression(); |
| 1317 | } |
| 1318 | |
| 1319 | /* assignmentExpression (COMMA assignmentExpression)* */ |
| 1320 | std::unique_ptr<ASTExpression> Parser::commaExpression() { |
| 1321 | std::unique_ptr<ASTExpression> result = this->assignmentExpression(); |
| 1322 | if (!result) { |
| 1323 | return nullptr; |
| 1324 | } |
| 1325 | Token t; |
| 1326 | while (this->checkNext(Token::COMMA, &t)) { |
| 1327 | std::unique_ptr<ASTExpression> right = this->commaExpression(); |
| 1328 | if (!right) { |
| 1329 | return nullptr; |
| 1330 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1331 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 1332 | } |
| 1333 | return result; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1334 | } |
| 1335 | |
| 1336 | /* ternaryExpression ((EQEQ | STAREQ | SLASHEQ | PERCENTEQ | PLUSEQ | MINUSEQ | SHLEQ | SHREQ | |
| 1337 | BITWISEANDEQ | BITWISEXOREQ | BITWISEOREQ | LOGICALANDEQ | LOGICALXOREQ | LOGICALOREQ) |
| 1338 | assignmentExpression)* |
| 1339 | */ |
| 1340 | std::unique_ptr<ASTExpression> Parser::assignmentExpression() { |
| 1341 | std::unique_ptr<ASTExpression> result = this->ternaryExpression(); |
| 1342 | if (!result) { |
| 1343 | return nullptr; |
| 1344 | } |
| 1345 | for (;;) { |
| 1346 | switch (this->peek().fKind) { |
| 1347 | case Token::EQ: // fall through |
| 1348 | case Token::STAREQ: // fall through |
| 1349 | case Token::SLASHEQ: // fall through |
| 1350 | case Token::PERCENTEQ: // fall through |
| 1351 | case Token::PLUSEQ: // fall through |
| 1352 | case Token::MINUSEQ: // fall through |
| 1353 | case Token::SHLEQ: // fall through |
| 1354 | case Token::SHREQ: // fall through |
| 1355 | case Token::BITWISEANDEQ: // fall through |
| 1356 | case Token::BITWISEXOREQ: // fall through |
| 1357 | case Token::BITWISEOREQ: // fall through |
| 1358 | case Token::LOGICALANDEQ: // fall through |
| 1359 | case Token::LOGICALXOREQ: // fall through |
| 1360 | case Token::LOGICALOREQ: { |
| 1361 | Token t = this->nextToken(); |
| 1362 | std::unique_ptr<ASTExpression> right = this->assignmentExpression(); |
| 1363 | if (!right) { |
| 1364 | return nullptr; |
| 1365 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1366 | result = std::unique_ptr<ASTExpression>(new ASTBinaryExpression(std::move(result), |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1367 | std::move(t), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1368 | std::move(right))); |
| 1369 | } |
| 1370 | default: |
| 1371 | return result; |
| 1372 | } |
| 1373 | } |
| 1374 | } |
| 1375 | |
| 1376 | /* logicalOrExpression ('?' expression ':' assignmentExpression)? */ |
| 1377 | std::unique_ptr<ASTExpression> Parser::ternaryExpression() { |
| 1378 | std::unique_ptr<ASTExpression> result = this->logicalOrExpression(); |
| 1379 | if (!result) { |
| 1380 | return nullptr; |
| 1381 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1382 | if (this->checkNext(Token::QUESTION)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1383 | std::unique_ptr<ASTExpression> trueExpr = this->expression(); |
| 1384 | if (!trueExpr) { |
| 1385 | return nullptr; |
| 1386 | } |
| 1387 | if (this->expect(Token::COLON, "':'")) { |
| 1388 | std::unique_ptr<ASTExpression> falseExpr = this->assignmentExpression(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1389 | return std::unique_ptr<ASTExpression>(new ASTTernaryExpression(std::move(result), |
| 1390 | std::move(trueExpr), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1391 | std::move(falseExpr))); |
| 1392 | } |
| 1393 | return nullptr; |
| 1394 | } |
| 1395 | return result; |
| 1396 | } |
| 1397 | |
| 1398 | /* logicalXorExpression (LOGICALOR logicalXorExpression)* */ |
| 1399 | std::unique_ptr<ASTExpression> Parser::logicalOrExpression() { |
| 1400 | std::unique_ptr<ASTExpression> result = this->logicalXorExpression(); |
| 1401 | if (!result) { |
| 1402 | return nullptr; |
| 1403 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1404 | Token t; |
| 1405 | while (this->checkNext(Token::LOGICALOR, &t)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1406 | std::unique_ptr<ASTExpression> right = this->logicalXorExpression(); |
| 1407 | if (!right) { |
| 1408 | return nullptr; |
| 1409 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1410 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1411 | } |
| 1412 | return result; |
| 1413 | } |
| 1414 | |
| 1415 | /* logicalAndExpression (LOGICALXOR logicalAndExpression)* */ |
| 1416 | std::unique_ptr<ASTExpression> Parser::logicalXorExpression() { |
| 1417 | std::unique_ptr<ASTExpression> result = this->logicalAndExpression(); |
| 1418 | if (!result) { |
| 1419 | return nullptr; |
| 1420 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1421 | Token t; |
| 1422 | while (this->checkNext(Token::LOGICALXOR, &t)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1423 | std::unique_ptr<ASTExpression> right = this->logicalAndExpression(); |
| 1424 | if (!right) { |
| 1425 | return nullptr; |
| 1426 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1427 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1428 | } |
| 1429 | return result; |
| 1430 | } |
| 1431 | |
| 1432 | /* bitwiseOrExpression (LOGICALAND bitwiseOrExpression)* */ |
| 1433 | std::unique_ptr<ASTExpression> Parser::logicalAndExpression() { |
| 1434 | std::unique_ptr<ASTExpression> result = this->bitwiseOrExpression(); |
| 1435 | if (!result) { |
| 1436 | return nullptr; |
| 1437 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1438 | Token t; |
| 1439 | while (this->checkNext(Token::LOGICALAND, &t)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1440 | std::unique_ptr<ASTExpression> right = this->bitwiseOrExpression(); |
| 1441 | if (!right) { |
| 1442 | return nullptr; |
| 1443 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1444 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1445 | } |
| 1446 | return result; |
| 1447 | } |
| 1448 | |
| 1449 | /* bitwiseXorExpression (BITWISEOR bitwiseXorExpression)* */ |
| 1450 | std::unique_ptr<ASTExpression> Parser::bitwiseOrExpression() { |
| 1451 | std::unique_ptr<ASTExpression> result = this->bitwiseXorExpression(); |
| 1452 | if (!result) { |
| 1453 | return nullptr; |
| 1454 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1455 | Token t; |
| 1456 | while (this->checkNext(Token::BITWISEOR, &t)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1457 | std::unique_ptr<ASTExpression> right = this->bitwiseXorExpression(); |
| 1458 | if (!right) { |
| 1459 | return nullptr; |
| 1460 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1461 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1462 | } |
| 1463 | return result; |
| 1464 | } |
| 1465 | |
| 1466 | /* bitwiseAndExpression (BITWISEXOR bitwiseAndExpression)* */ |
| 1467 | std::unique_ptr<ASTExpression> Parser::bitwiseXorExpression() { |
| 1468 | std::unique_ptr<ASTExpression> result = this->bitwiseAndExpression(); |
| 1469 | if (!result) { |
| 1470 | return nullptr; |
| 1471 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1472 | Token t; |
| 1473 | while (this->checkNext(Token::BITWISEXOR, &t)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1474 | std::unique_ptr<ASTExpression> right = this->bitwiseAndExpression(); |
| 1475 | if (!right) { |
| 1476 | return nullptr; |
| 1477 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1478 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1479 | } |
| 1480 | return result; |
| 1481 | } |
| 1482 | |
| 1483 | /* equalityExpression (BITWISEAND equalityExpression)* */ |
| 1484 | std::unique_ptr<ASTExpression> Parser::bitwiseAndExpression() { |
| 1485 | std::unique_ptr<ASTExpression> result = this->equalityExpression(); |
| 1486 | if (!result) { |
| 1487 | return nullptr; |
| 1488 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1489 | Token t; |
| 1490 | while (this->checkNext(Token::BITWISEAND, &t)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1491 | std::unique_ptr<ASTExpression> right = this->equalityExpression(); |
| 1492 | if (!right) { |
| 1493 | return nullptr; |
| 1494 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1495 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1496 | } |
| 1497 | return result; |
| 1498 | } |
| 1499 | |
| 1500 | /* relationalExpression ((EQEQ | NEQ) relationalExpression)* */ |
| 1501 | std::unique_ptr<ASTExpression> Parser::equalityExpression() { |
| 1502 | std::unique_ptr<ASTExpression> result = this->relationalExpression(); |
| 1503 | if (!result) { |
| 1504 | return nullptr; |
| 1505 | } |
| 1506 | for (;;) { |
| 1507 | switch (this->peek().fKind) { |
| 1508 | case Token::EQEQ: // fall through |
| 1509 | case Token::NEQ: { |
| 1510 | Token t = this->nextToken(); |
| 1511 | std::unique_ptr<ASTExpression> right = this->relationalExpression(); |
| 1512 | if (!right) { |
| 1513 | return nullptr; |
| 1514 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1515 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1516 | break; |
| 1517 | } |
| 1518 | default: |
| 1519 | return result; |
| 1520 | } |
| 1521 | } |
| 1522 | } |
| 1523 | |
| 1524 | /* shiftExpression ((LT | GT | LTEQ | GTEQ) shiftExpression)* */ |
| 1525 | std::unique_ptr<ASTExpression> Parser::relationalExpression() { |
| 1526 | std::unique_ptr<ASTExpression> result = this->shiftExpression(); |
| 1527 | if (!result) { |
| 1528 | return nullptr; |
| 1529 | } |
| 1530 | for (;;) { |
| 1531 | switch (this->peek().fKind) { |
| 1532 | case Token::LT: // fall through |
| 1533 | case Token::GT: // fall through |
| 1534 | case Token::LTEQ: // fall through |
| 1535 | case Token::GTEQ: { |
| 1536 | Token t = this->nextToken(); |
| 1537 | std::unique_ptr<ASTExpression> right = this->shiftExpression(); |
| 1538 | if (!right) { |
| 1539 | return nullptr; |
| 1540 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1541 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), |
| 1542 | std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1543 | break; |
| 1544 | } |
| 1545 | default: |
| 1546 | return result; |
| 1547 | } |
| 1548 | } |
| 1549 | } |
| 1550 | |
| 1551 | /* additiveExpression ((SHL | SHR) additiveExpression)* */ |
| 1552 | std::unique_ptr<ASTExpression> Parser::shiftExpression() { |
| 1553 | std::unique_ptr<ASTExpression> result = this->additiveExpression(); |
| 1554 | if (!result) { |
| 1555 | return nullptr; |
| 1556 | } |
| 1557 | for (;;) { |
| 1558 | switch (this->peek().fKind) { |
| 1559 | case Token::SHL: // fall through |
| 1560 | case Token::SHR: { |
| 1561 | Token t = this->nextToken(); |
| 1562 | std::unique_ptr<ASTExpression> right = this->additiveExpression(); |
| 1563 | if (!right) { |
| 1564 | return nullptr; |
| 1565 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1566 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), |
| 1567 | std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1568 | break; |
| 1569 | } |
| 1570 | default: |
| 1571 | return result; |
| 1572 | } |
| 1573 | } |
| 1574 | } |
| 1575 | |
| 1576 | /* multiplicativeExpression ((PLUS | MINUS) multiplicativeExpression)* */ |
| 1577 | std::unique_ptr<ASTExpression> Parser::additiveExpression() { |
| 1578 | std::unique_ptr<ASTExpression> result = this->multiplicativeExpression(); |
| 1579 | if (!result) { |
| 1580 | return nullptr; |
| 1581 | } |
| 1582 | for (;;) { |
| 1583 | switch (this->peek().fKind) { |
| 1584 | case Token::PLUS: // fall through |
| 1585 | case Token::MINUS: { |
| 1586 | Token t = this->nextToken(); |
| 1587 | std::unique_ptr<ASTExpression> right = this->multiplicativeExpression(); |
| 1588 | if (!right) { |
| 1589 | return nullptr; |
| 1590 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1591 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), |
| 1592 | std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1593 | break; |
| 1594 | } |
| 1595 | default: |
| 1596 | return result; |
| 1597 | } |
| 1598 | } |
| 1599 | } |
| 1600 | |
| 1601 | /* unaryExpression ((STAR | SLASH | PERCENT) unaryExpression)* */ |
| 1602 | std::unique_ptr<ASTExpression> Parser::multiplicativeExpression() { |
| 1603 | std::unique_ptr<ASTExpression> result = this->unaryExpression(); |
| 1604 | if (!result) { |
| 1605 | return nullptr; |
| 1606 | } |
| 1607 | for (;;) { |
| 1608 | switch (this->peek().fKind) { |
| 1609 | case Token::STAR: // fall through |
| 1610 | case Token::SLASH: // fall through |
| 1611 | case Token::PERCENT: { |
| 1612 | Token t = this->nextToken(); |
| 1613 | std::unique_ptr<ASTExpression> right = this->unaryExpression(); |
| 1614 | if (!right) { |
| 1615 | return nullptr; |
| 1616 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1617 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), |
| 1618 | std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1619 | break; |
| 1620 | } |
| 1621 | default: |
| 1622 | return result; |
| 1623 | } |
| 1624 | } |
| 1625 | } |
| 1626 | |
| 1627 | /* postfixExpression | (PLUS | MINUS | NOT | PLUSPLUS | MINUSMINUS) unaryExpression */ |
| 1628 | std::unique_ptr<ASTExpression> Parser::unaryExpression() { |
| 1629 | switch (this->peek().fKind) { |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 1630 | case Token::PLUS: // fall through |
| 1631 | case Token::MINUS: // fall through |
| 1632 | case Token::LOGICALNOT: // fall through |
| 1633 | case Token::BITWISENOT: // fall through |
| 1634 | case Token::PLUSPLUS: // fall through |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1635 | case Token::MINUSMINUS: { |
| 1636 | Token t = this->nextToken(); |
| 1637 | std::unique_ptr<ASTExpression> expr = this->unaryExpression(); |
| 1638 | if (!expr) { |
| 1639 | return nullptr; |
| 1640 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame] | 1641 | return std::unique_ptr<ASTExpression>(new ASTPrefixExpression(std::move(t), |
| 1642 | std::move(expr))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1643 | } |
| 1644 | default: |
| 1645 | return this->postfixExpression(); |
| 1646 | } |
| 1647 | } |
| 1648 | |
| 1649 | /* term suffix* */ |
| 1650 | std::unique_ptr<ASTExpression> Parser::postfixExpression() { |
| 1651 | std::unique_ptr<ASTExpression> result = this->term(); |
| 1652 | if (!result) { |
| 1653 | return nullptr; |
| 1654 | } |
| 1655 | for (;;) { |
| 1656 | switch (this->peek().fKind) { |
| 1657 | case Token::LBRACKET: // fall through |
| 1658 | case Token::DOT: // fall through |
| 1659 | case Token::LPAREN: // fall through |
| 1660 | case Token::PLUSPLUS: // fall through |
| 1661 | case Token::MINUSMINUS: { |
| 1662 | std::unique_ptr<ASTSuffix> s = this->suffix(); |
| 1663 | if (!s) { |
| 1664 | return nullptr; |
| 1665 | } |
| 1666 | result.reset(new ASTSuffixExpression(std::move(result), std::move(s))); |
| 1667 | break; |
| 1668 | } |
| 1669 | default: |
| 1670 | return result; |
| 1671 | } |
| 1672 | } |
| 1673 | } |
| 1674 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1675 | /* LBRACKET expression? RBRACKET | DOT IDENTIFIER | LPAREN parameters RPAREN | |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1676 | PLUSPLUS | MINUSMINUS */ |
| 1677 | std::unique_ptr<ASTSuffix> Parser::suffix() { |
| 1678 | Token next = this->nextToken(); |
| 1679 | switch (next.fKind) { |
| 1680 | case Token::LBRACKET: { |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1681 | if (this->checkNext(Token::RBRACKET)) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1682 | return std::unique_ptr<ASTSuffix>(new ASTIndexSuffix(next.fOffset)); |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 1683 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1684 | std::unique_ptr<ASTExpression> e = this->expression(); |
| 1685 | if (!e) { |
| 1686 | return nullptr; |
| 1687 | } |
| 1688 | this->expect(Token::RBRACKET, "']' to complete array access expression"); |
| 1689 | return std::unique_ptr<ASTSuffix>(new ASTIndexSuffix(std::move(e))); |
| 1690 | } |
| 1691 | case Token::DOT: { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1692 | int offset = this->peek().fOffset; |
| 1693 | StringFragment text; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1694 | if (this->identifier(&text)) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1695 | return std::unique_ptr<ASTSuffix>(new ASTFieldSuffix(offset, std::move(text))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1696 | } |
| 1697 | return nullptr; |
| 1698 | } |
| 1699 | case Token::LPAREN: { |
| 1700 | std::vector<std::unique_ptr<ASTExpression>> parameters; |
| 1701 | if (this->peek().fKind != Token::RPAREN) { |
| 1702 | for (;;) { |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 1703 | std::unique_ptr<ASTExpression> expr = this->assignmentExpression(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1704 | if (!expr) { |
| 1705 | return nullptr; |
| 1706 | } |
| 1707 | parameters.push_back(std::move(expr)); |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 1708 | if (!this->checkNext(Token::COMMA)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1709 | break; |
| 1710 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1711 | } |
| 1712 | } |
| 1713 | this->expect(Token::RPAREN, "')' to complete function parameters"); |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1714 | return std::unique_ptr<ASTSuffix>(new ASTCallSuffix(next.fOffset, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1715 | std::move(parameters))); |
| 1716 | } |
| 1717 | case Token::PLUSPLUS: |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1718 | return std::unique_ptr<ASTSuffix>(new ASTSuffix(next.fOffset, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1719 | ASTSuffix::kPostIncrement_Kind)); |
| 1720 | case Token::MINUSMINUS: |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1721 | return std::unique_ptr<ASTSuffix>(new ASTSuffix(next.fOffset, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1722 | ASTSuffix::kPostDecrement_Kind)); |
| 1723 | default: { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1724 | this->error(next, "expected expression suffix, but found '" + this->text(next) + |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1725 | "'\n"); |
| 1726 | return nullptr; |
| 1727 | } |
| 1728 | } |
| 1729 | } |
| 1730 | |
| 1731 | /* IDENTIFIER | intLiteral | floatLiteral | boolLiteral | '(' expression ')' */ |
| 1732 | std::unique_ptr<ASTExpression> Parser::term() { |
| 1733 | std::unique_ptr<ASTExpression> result; |
| 1734 | Token t = this->peek(); |
| 1735 | switch (t.fKind) { |
| 1736 | case Token::IDENTIFIER: { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1737 | StringFragment text; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1738 | if (this->identifier(&text)) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1739 | result.reset(new ASTIdentifier(t.fOffset, std::move(text))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1740 | } |
| 1741 | break; |
| 1742 | } |
| 1743 | case Token::INT_LITERAL: { |
| 1744 | int64_t i; |
| 1745 | if (this->intLiteral(&i)) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1746 | result.reset(new ASTIntLiteral(t.fOffset, i)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1747 | } |
| 1748 | break; |
| 1749 | } |
| 1750 | case Token::FLOAT_LITERAL: { |
| 1751 | double f; |
| 1752 | if (this->floatLiteral(&f)) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1753 | result.reset(new ASTFloatLiteral(t.fOffset, f)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1754 | } |
| 1755 | break; |
| 1756 | } |
| 1757 | case Token::TRUE_LITERAL: // fall through |
| 1758 | case Token::FALSE_LITERAL: { |
| 1759 | bool b; |
| 1760 | if (this->boolLiteral(&b)) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1761 | result.reset(new ASTBoolLiteral(t.fOffset, b)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1762 | } |
| 1763 | break; |
| 1764 | } |
| 1765 | case Token::LPAREN: { |
| 1766 | this->nextToken(); |
| 1767 | result = this->expression(); |
| 1768 | if (result) { |
| 1769 | this->expect(Token::RPAREN, "')' to complete expression"); |
| 1770 | } |
| 1771 | break; |
| 1772 | } |
| 1773 | default: |
| 1774 | this->nextToken(); |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1775 | this->error(t.fOffset, "expected expression, but found '" + this->text(t) + "'\n"); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1776 | result = nullptr; |
| 1777 | } |
| 1778 | return result; |
| 1779 | } |
| 1780 | |
| 1781 | /* INT_LITERAL */ |
| 1782 | bool Parser::intLiteral(int64_t* dest) { |
| 1783 | Token t; |
| 1784 | if (this->expect(Token::INT_LITERAL, "integer literal", &t)) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1785 | *dest = SkSL::stol(this->text(t)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1786 | return true; |
| 1787 | } |
| 1788 | return false; |
| 1789 | } |
| 1790 | |
| 1791 | /* FLOAT_LITERAL */ |
| 1792 | bool Parser::floatLiteral(double* dest) { |
| 1793 | Token t; |
| 1794 | if (this->expect(Token::FLOAT_LITERAL, "float literal", &t)) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1795 | *dest = SkSL::stod(this->text(t)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1796 | return true; |
| 1797 | } |
| 1798 | return false; |
| 1799 | } |
| 1800 | |
| 1801 | /* TRUE_LITERAL | FALSE_LITERAL */ |
| 1802 | bool Parser::boolLiteral(bool* dest) { |
| 1803 | Token t = this->nextToken(); |
| 1804 | switch (t.fKind) { |
| 1805 | case Token::TRUE_LITERAL: |
| 1806 | *dest = true; |
| 1807 | return true; |
| 1808 | case Token::FALSE_LITERAL: |
| 1809 | *dest = false; |
| 1810 | return true; |
| 1811 | default: |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1812 | this->error(t, "expected 'true' or 'false', but found '" + this->text(t) + "'\n"); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1813 | return false; |
| 1814 | } |
| 1815 | } |
| 1816 | |
| 1817 | /* IDENTIFIER */ |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1818 | bool Parser::identifier(StringFragment* dest) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1819 | Token t; |
| 1820 | if (this->expect(Token::IDENTIFIER, "identifier", &t)) { |
Ethan Nicholas | 5b5f096 | 2017-09-11 13:50:14 -0700 | [diff] [blame^] | 1821 | *dest = this->text(t); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1822 | return true; |
| 1823 | } |
| 1824 | return false; |
| 1825 | } |
| 1826 | |
| 1827 | } // namespace |