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" |
| 10 | #include "SkSLToken.h" |
| 11 | |
| 12 | #define register |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 13 | #include "disable_flex_warnings.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 14 | #include "lex.sksl.c" |
Ethan Nicholas | 0dd30d9 | 2017-05-01 16:57:07 -0400 | [diff] [blame] | 15 | static_assert(YY_FLEX_MAJOR_VERSION * 10000 + YY_FLEX_MINOR_VERSION * 100 + |
| 16 | YY_FLEX_SUBMINOR_VERSION >= 20601, |
Ethan Nicholas | 9442194 | 2017-03-31 17:06:42 -0400 | [diff] [blame] | 17 | "we require Flex 2.6.1 or better for security reasons"); |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 18 | #undef register |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 19 | #ifdef __clang__ |
| 20 | #pragma clang diagnostic pop |
| 21 | #endif |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 22 | #ifdef __GNUC__ |
| 23 | #pragma GCC diagnostic pop |
| 24 | #endif |
| 25 | #ifdef _MSC_VER |
| 26 | #pragma warning(pop) |
| 27 | #endif |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 28 | |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 29 | #include "lex.layout.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 30 | #include "ast/SkSLASTBinaryExpression.h" |
| 31 | #include "ast/SkSLASTBlock.h" |
| 32 | #include "ast/SkSLASTBoolLiteral.h" |
| 33 | #include "ast/SkSLASTBreakStatement.h" |
| 34 | #include "ast/SkSLASTCallSuffix.h" |
| 35 | #include "ast/SkSLASTContinueStatement.h" |
| 36 | #include "ast/SkSLASTDiscardStatement.h" |
| 37 | #include "ast/SkSLASTDoStatement.h" |
| 38 | #include "ast/SkSLASTExpression.h" |
| 39 | #include "ast/SkSLASTExpressionStatement.h" |
| 40 | #include "ast/SkSLASTExtension.h" |
| 41 | #include "ast/SkSLASTFieldSuffix.h" |
| 42 | #include "ast/SkSLASTFloatLiteral.h" |
| 43 | #include "ast/SkSLASTForStatement.h" |
| 44 | #include "ast/SkSLASTFunction.h" |
| 45 | #include "ast/SkSLASTIdentifier.h" |
| 46 | #include "ast/SkSLASTIfStatement.h" |
| 47 | #include "ast/SkSLASTIndexSuffix.h" |
| 48 | #include "ast/SkSLASTInterfaceBlock.h" |
| 49 | #include "ast/SkSLASTIntLiteral.h" |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 50 | #include "ast/SkSLASTModifiersDeclaration.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 51 | #include "ast/SkSLASTParameter.h" |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 52 | #include "ast/SkSLASTPrecision.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 53 | #include "ast/SkSLASTPrefixExpression.h" |
| 54 | #include "ast/SkSLASTReturnStatement.h" |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 55 | #include "ast/SkSLASTSection.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 56 | #include "ast/SkSLASTStatement.h" |
| 57 | #include "ast/SkSLASTSuffixExpression.h" |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 58 | #include "ast/SkSLASTSwitchCase.h" |
| 59 | #include "ast/SkSLASTSwitchStatement.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 60 | #include "ast/SkSLASTTernaryExpression.h" |
| 61 | #include "ast/SkSLASTType.h" |
| 62 | #include "ast/SkSLASTVarDeclaration.h" |
| 63 | #include "ast/SkSLASTVarDeclarationStatement.h" |
| 64 | #include "ast/SkSLASTWhileStatement.h" |
| 65 | #include "ir/SkSLSymbolTable.h" |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 66 | #include "ir/SkSLModifiers.h" |
ethannicholas | d598f79 | 2016-07-25 10:08:54 -0700 | [diff] [blame] | 67 | #include "ir/SkSLType.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 68 | |
| 69 | namespace SkSL { |
| 70 | |
ethannicholas | cad6416 | 2016-10-27 10:54:02 -0700 | [diff] [blame] | 71 | #define MAX_PARSE_DEPTH 50 |
| 72 | |
| 73 | class AutoDepth { |
| 74 | public: |
| 75 | AutoDepth(Parser* p) |
| 76 | : fParser(p) { |
| 77 | fParser->fDepth++; |
| 78 | } |
| 79 | |
| 80 | ~AutoDepth() { |
| 81 | fParser->fDepth--; |
| 82 | } |
| 83 | |
| 84 | bool checkValid() { |
| 85 | if (fParser->fDepth > MAX_PARSE_DEPTH) { |
Ethan Nicholas | 0df1b04 | 2017-03-31 13:56:23 -0400 | [diff] [blame] | 86 | fParser->error(fParser->peek().fPosition, String("exceeded max parse depth")); |
ethannicholas | cad6416 | 2016-10-27 10:54:02 -0700 | [diff] [blame] | 87 | return false; |
| 88 | } |
| 89 | return true; |
| 90 | } |
| 91 | |
| 92 | private: |
| 93 | Parser* fParser; |
| 94 | }; |
| 95 | |
Ethan Nicholas | 0df1b04 | 2017-03-31 13:56:23 -0400 | [diff] [blame] | 96 | Parser::Parser(String text, SymbolTable& types, ErrorReporter& errors) |
| 97 | : fPushback(Position(-1, -1), Token::INVALID_TOKEN, String()) |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 98 | , fTypes(types) |
| 99 | , fErrors(errors) { |
| 100 | sksllex_init(&fScanner); |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 101 | layoutlex_init(&fLayoutScanner); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 102 | fBuffer = sksl_scan_string(text.c_str(), fScanner); |
| 103 | skslset_lineno(1, fScanner); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | Parser::~Parser() { |
| 107 | sksl_delete_buffer(fBuffer, fScanner); |
ethannicholas | 69a7e7c | 2016-07-01 19:09:27 -0700 | [diff] [blame] | 108 | sksllex_destroy(fScanner); |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 109 | layoutlex_destroy(fLayoutScanner); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 110 | } |
| 111 | |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 112 | /* (precision | directive | section | declaration)* END_OF_FILE */ |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 113 | std::vector<std::unique_ptr<ASTDeclaration>> Parser::file() { |
| 114 | std::vector<std::unique_ptr<ASTDeclaration>> result; |
| 115 | for (;;) { |
| 116 | switch (this->peek().fKind) { |
| 117 | case Token::END_OF_FILE: |
| 118 | return result; |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 119 | case Token::PRECISION: { |
| 120 | std::unique_ptr<ASTDeclaration> precision = this->precision(); |
| 121 | if (precision) { |
| 122 | result.push_back(std::move(precision)); |
| 123 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 124 | break; |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 125 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 126 | case Token::DIRECTIVE: { |
| 127 | std::unique_ptr<ASTDeclaration> decl = this->directive(); |
| 128 | if (decl) { |
| 129 | result.push_back(std::move(decl)); |
| 130 | } |
| 131 | break; |
| 132 | } |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 133 | case Token::SECTION: { |
| 134 | std::unique_ptr<ASTDeclaration> section = this->section(); |
| 135 | if (section) { |
| 136 | result.push_back(std::move(section)); |
| 137 | } |
| 138 | break; |
| 139 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 140 | default: { |
| 141 | std::unique_ptr<ASTDeclaration> decl = this->declaration(); |
| 142 | if (!decl) { |
| 143 | continue; |
| 144 | } |
| 145 | result.push_back(std::move(decl)); |
| 146 | } |
| 147 | } |
| 148 | } |
| 149 | } |
| 150 | |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 151 | Token Parser::nextRawToken(bool needText) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 152 | if (fPushback.fKind != Token::INVALID_TOKEN) { |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 153 | Token result(std::move(fPushback)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 154 | fPushback.fKind = Token::INVALID_TOKEN; |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 155 | fPushback.fText.clear(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 156 | return result; |
| 157 | } |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 158 | Token::Kind kind = (Token::Kind) sksllex(fScanner); |
| 159 | if (!needText) { |
| 160 | switch (kind) { |
| 161 | case Token::Kind::DIRECTIVE: // fall through |
| 162 | case Token::Kind::IDENTIFIER: // fall through |
| 163 | case Token::Kind::INT_LITERAL: // fall through |
| 164 | case Token::Kind::FLOAT_LITERAL: // fall through |
| 165 | case Token::Kind::SECTION: |
| 166 | needText = true; |
| 167 | default: |
| 168 | break; |
| 169 | } |
| 170 | } |
| 171 | static String unavailable("<unavailable>"); |
| 172 | return Token(Position(skslget_lineno(fScanner), -1), kind, |
| 173 | needText ? String(skslget_text(fScanner)) : unavailable); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | Token Parser::nextToken() { |
| 177 | Token token; |
| 178 | do { |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 179 | token = this->nextRawToken(false); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 180 | } while (token.fKind == Token::WHITESPACE); |
| 181 | return token; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 182 | } |
| 183 | |
| 184 | void Parser::pushback(Token t) { |
| 185 | ASSERT(fPushback.fKind == Token::INVALID_TOKEN); |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 186 | fPushback = std::move(t); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | Token Parser::peek() { |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 190 | if (fPushback.fKind == Token::INVALID_TOKEN) { |
| 191 | fPushback = this->nextToken(); |
| 192 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 193 | return fPushback; |
| 194 | } |
| 195 | |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 196 | bool Parser::checkNext(Token::Kind kind, Token* result) { |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 197 | if (fPushback.fKind != Token::INVALID_TOKEN && fPushback.fKind != kind) { |
| 198 | return false; |
| 199 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 200 | Token next = this->nextToken(); |
| 201 | if (next.fKind == kind) { |
| 202 | if (result) { |
| 203 | *result = next; |
| 204 | } |
| 205 | return true; |
| 206 | } |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 207 | this->pushback(std::move(next)); |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 208 | return false; |
| 209 | } |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 210 | |
| 211 | bool Parser::expect(Token::Kind kind, const char* expected, Token* result) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 212 | Token next = this->nextToken(); |
| 213 | if (next.fKind == kind) { |
| 214 | if (result) { |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 215 | *result = std::move(next); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 216 | } |
| 217 | return true; |
| 218 | } else { |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 219 | if (next.fText.size()) { |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 220 | this->error(next.fPosition, "expected " + String(expected) + ", but found '" + |
| 221 | next.fText + "'"); |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 222 | } else { |
| 223 | this->error(next.fPosition, "parse error, recompile in debug mode for details"); |
| 224 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 225 | return false; |
| 226 | } |
| 227 | } |
| 228 | |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 229 | void Parser::error(Position p, const char* msg) { |
Ethan Nicholas | 0df1b04 | 2017-03-31 13:56:23 -0400 | [diff] [blame] | 230 | this->error(p, String(msg)); |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 231 | } |
| 232 | |
Ethan Nicholas | 0df1b04 | 2017-03-31 13:56:23 -0400 | [diff] [blame] | 233 | void Parser::error(Position p, String msg) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 234 | fErrors.error(p, msg); |
| 235 | } |
| 236 | |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 237 | bool Parser::isType(const String& name) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 238 | return nullptr != fTypes[name]; |
| 239 | } |
| 240 | |
| 241 | /* PRECISION (LOWP | MEDIUMP | HIGHP) type SEMICOLON */ |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 242 | std::unique_ptr<ASTDeclaration> Parser::precision() { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 243 | if (!this->expect(Token::PRECISION, "'precision'")) { |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 244 | return nullptr; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 245 | } |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 246 | Modifiers::Flag result; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 247 | Token p = this->nextToken(); |
| 248 | switch (p.fKind) { |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 249 | case Token::LOWP: |
| 250 | result = Modifiers::kLowp_Flag; |
| 251 | break; |
| 252 | case Token::MEDIUMP: |
| 253 | result = Modifiers::kMediump_Flag; |
| 254 | break; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 255 | case Token::HIGHP: |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 256 | result = Modifiers::kHighp_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 257 | break; |
| 258 | default: |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 259 | this->error(p.fPosition, "expected 'lowp', 'mediump', or 'highp', but found '" + |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 260 | p.fText + "'"); |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 261 | return nullptr; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 262 | } |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 263 | // FIXME handle the type |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 264 | if (!this->type()) { |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 265 | return nullptr; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 266 | } |
| 267 | this->expect(Token::SEMICOLON, "';'"); |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 268 | return std::unique_ptr<ASTDeclaration>(new ASTPrecision(p.fPosition, result)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 269 | } |
| 270 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 271 | /* DIRECTIVE(#version) INT_LITERAL ("es" | "compatibility")? | |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 272 | DIRECTIVE(#extension) IDENTIFIER COLON IDENTIFIER */ |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 273 | std::unique_ptr<ASTDeclaration> Parser::directive() { |
| 274 | Token start; |
| 275 | if (!this->expect(Token::DIRECTIVE, "a directive", &start)) { |
| 276 | return nullptr; |
| 277 | } |
| 278 | if (start.fText == "#version") { |
| 279 | this->expect(Token::INT_LITERAL, "a version number"); |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 280 | Token next = this->peek(); |
| 281 | if (next.fText == "es" || next.fText == "compatibility") { |
| 282 | this->nextToken(); |
| 283 | } |
| 284 | // version is ignored for now; it will eventually become an error when we stop pretending |
| 285 | // to be GLSL |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 286 | return nullptr; |
| 287 | } else if (start.fText == "#extension") { |
| 288 | Token name; |
| 289 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 290 | return nullptr; |
| 291 | } |
| 292 | if (!this->expect(Token::COLON, "':'")) { |
| 293 | return nullptr; |
| 294 | } |
| 295 | // FIXME: need to start paying attention to this token |
| 296 | if (!this->expect(Token::IDENTIFIER, "an identifier")) { |
| 297 | return nullptr; |
| 298 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 299 | return std::unique_ptr<ASTDeclaration>(new ASTExtension(start.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 300 | std::move(name.fText))); |
| 301 | } else { |
| 302 | this->error(start.fPosition, "unsupported directive '" + start.fText + "'"); |
| 303 | return nullptr; |
| 304 | } |
| 305 | } |
| 306 | |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 307 | /* SECTION LBRACE (LPAREN IDENTIFIER RPAREN)? <any sequence of tokens with balanced braces> |
| 308 | RBRACE */ |
| 309 | std::unique_ptr<ASTDeclaration> Parser::section() { |
| 310 | Token start; |
| 311 | if (!this->expect(Token::SECTION, "a section token", &start)) { |
| 312 | return nullptr; |
| 313 | } |
| 314 | String argument; |
| 315 | if (this->peek().fKind == Token::LPAREN) { |
| 316 | this->nextToken(); |
| 317 | Token argToken; |
| 318 | if (!this->expect(Token::IDENTIFIER, "an identifier", &argToken)) { |
| 319 | return nullptr; |
| 320 | } |
| 321 | argument = argToken.fText; |
| 322 | if (!this->expect(Token::RPAREN, "')'")) { |
| 323 | return nullptr; |
| 324 | } |
| 325 | } |
| 326 | if (!this->expect(Token::LBRACE, "'{'")) { |
| 327 | return nullptr; |
| 328 | } |
| 329 | String text; |
| 330 | int level = 1; |
| 331 | for (;;) { |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 332 | Token next = this->nextRawToken(true); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 333 | switch (next.fKind) { |
| 334 | case Token::LBRACE: |
| 335 | ++level; |
| 336 | break; |
| 337 | case Token::RBRACE: |
| 338 | --level; |
| 339 | break; |
| 340 | case Token::END_OF_FILE: |
| 341 | this->error(start.fPosition, "reached end of file while parsing section"); |
| 342 | return nullptr; |
| 343 | default: |
| 344 | break; |
| 345 | } |
| 346 | if (!level) { |
| 347 | break; |
| 348 | } |
| 349 | text += next.fText; |
| 350 | } |
| 351 | return std::unique_ptr<ASTDeclaration>(new ASTSection(start.fPosition, |
| 352 | String(start.fText.c_str() + 1), |
| 353 | argument, |
| 354 | text)); |
| 355 | } |
| 356 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 357 | /* modifiers (structVarDeclaration | type IDENTIFIER ((LPAREN parameter |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 358 | (COMMA parameter)* RPAREN (block | SEMICOLON)) | SEMICOLON) | interfaceBlock) */ |
| 359 | std::unique_ptr<ASTDeclaration> Parser::declaration() { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 360 | Modifiers modifiers = this->modifiers(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 361 | Token lookahead = this->peek(); |
| 362 | if (lookahead.fKind == Token::IDENTIFIER && !this->isType(lookahead.fText)) { |
| 363 | // we have an identifier that's not a type, could be the start of an interface block |
| 364 | return this->interfaceBlock(modifiers); |
| 365 | } |
| 366 | if (lookahead.fKind == Token::STRUCT) { |
| 367 | return this->structVarDeclaration(modifiers); |
| 368 | } |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 369 | if (lookahead.fKind == Token::SEMICOLON) { |
| 370 | this->nextToken(); |
| 371 | return std::unique_ptr<ASTDeclaration>(new ASTModifiersDeclaration(modifiers)); |
| 372 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 373 | std::unique_ptr<ASTType> type(this->type()); |
| 374 | if (!type) { |
| 375 | return nullptr; |
| 376 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 377 | if (type->fKind == ASTType::kStruct_Kind && this->checkNext(Token::SEMICOLON)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 378 | return nullptr; |
| 379 | } |
| 380 | Token name; |
| 381 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 382 | return nullptr; |
| 383 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 384 | if (this->checkNext(Token::LPAREN)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 385 | std::vector<std::unique_ptr<ASTParameter>> parameters; |
| 386 | while (this->peek().fKind != Token::RPAREN) { |
| 387 | if (parameters.size() > 0) { |
| 388 | if (!this->expect(Token::COMMA, "','")) { |
| 389 | return nullptr; |
| 390 | } |
| 391 | } |
| 392 | std::unique_ptr<ASTParameter> parameter = this->parameter(); |
| 393 | if (!parameter) { |
| 394 | return nullptr; |
| 395 | } |
| 396 | parameters.push_back(std::move(parameter)); |
| 397 | } |
| 398 | this->nextToken(); |
| 399 | std::unique_ptr<ASTBlock> body; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 400 | if (!this->checkNext(Token::SEMICOLON)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 401 | body = this->block(); |
| 402 | if (!body) { |
| 403 | return nullptr; |
| 404 | } |
| 405 | } |
Ethan Nicholas | cb67096 | 2017-04-20 19:31:52 -0400 | [diff] [blame] | 406 | return std::unique_ptr<ASTDeclaration>(new ASTFunction(name.fPosition, |
| 407 | modifiers, |
| 408 | std::move(type), |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 409 | std::move(name.fText), |
| 410 | std::move(parameters), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 411 | std::move(body))); |
| 412 | } else { |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 413 | return this->varDeclarationEnd(modifiers, std::move(type), std::move(name.fText)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 414 | } |
| 415 | } |
| 416 | |
| 417 | /* modifiers type IDENTIFIER varDeclarationEnd */ |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 418 | std::unique_ptr<ASTVarDeclarations> Parser::varDeclarations() { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 419 | Modifiers modifiers = this->modifiers(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 420 | std::unique_ptr<ASTType> type(this->type()); |
| 421 | if (!type) { |
| 422 | return nullptr; |
| 423 | } |
| 424 | Token name; |
| 425 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 426 | return nullptr; |
| 427 | } |
| 428 | return this->varDeclarationEnd(modifiers, std::move(type), std::move(name.fText)); |
| 429 | } |
| 430 | |
| 431 | /* STRUCT IDENTIFIER LBRACE varDeclaration* RBRACE */ |
| 432 | std::unique_ptr<ASTType> Parser::structDeclaration() { |
| 433 | if (!this->expect(Token::STRUCT, "'struct'")) { |
| 434 | return nullptr; |
| 435 | } |
| 436 | Token name; |
| 437 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 438 | return nullptr; |
| 439 | } |
| 440 | if (!this->expect(Token::LBRACE, "'{'")) { |
| 441 | return nullptr; |
| 442 | } |
| 443 | std::vector<Type::Field> fields; |
| 444 | while (this->peek().fKind != Token::RBRACE) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 445 | std::unique_ptr<ASTVarDeclarations> decl = this->varDeclarations(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 446 | if (!decl) { |
| 447 | return nullptr; |
| 448 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 449 | for (const auto& var : decl->fVars) { |
ethannicholas | d598f79 | 2016-07-25 10:08:54 -0700 | [diff] [blame] | 450 | auto type = (const Type*) fTypes[decl->fType->fName]; |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 451 | for (int i = (int) var.fSizes.size() - 1; i >= 0; i--) { |
ethannicholas | dd4645b | 2016-10-14 12:14:46 -0700 | [diff] [blame] | 452 | if (!var.fSizes[i] || var.fSizes[i]->fKind != ASTExpression::kInt_Kind) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 453 | this->error(decl->fPosition, "array size in struct field must be a constant"); |
ethannicholas | dd4645b | 2016-10-14 12:14:46 -0700 | [diff] [blame] | 454 | return nullptr; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 455 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 456 | uint64_t columns = ((ASTIntLiteral&) *var.fSizes[i]).fValue; |
Ethan Nicholas | 0df1b04 | 2017-03-31 13:56:23 -0400 | [diff] [blame] | 457 | String name = type->name() + "[" + to_string(columns) + "]"; |
ethannicholas | d598f79 | 2016-07-25 10:08:54 -0700 | [diff] [blame] | 458 | type = new Type(name, Type::kArray_Kind, *type, (int) columns); |
| 459 | fTypes.takeOwnership((Type*) type); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 460 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 461 | fields.push_back(Type::Field(decl->fModifiers, var.fName, type)); |
| 462 | if (var.fValue) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 463 | this->error(decl->fPosition, "initializers are not permitted on struct fields"); |
| 464 | } |
| 465 | } |
| 466 | } |
| 467 | if (!this->expect(Token::RBRACE, "'}'")) { |
| 468 | return nullptr; |
| 469 | } |
Ethan Nicholas | 1967177 | 2016-11-28 16:30:17 -0500 | [diff] [blame] | 470 | fTypes.add(name.fText, std::unique_ptr<Type>(new Type(name.fPosition, name.fText, fields))); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 471 | return std::unique_ptr<ASTType>(new ASTType(name.fPosition, name.fText, |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 472 | ASTType::kStruct_Kind, std::vector<int>())); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 473 | } |
| 474 | |
| 475 | /* structDeclaration ((IDENTIFIER varDeclarationEnd) | SEMICOLON) */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 476 | std::unique_ptr<ASTVarDeclarations> Parser::structVarDeclaration(Modifiers modifiers) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 477 | std::unique_ptr<ASTType> type = this->structDeclaration(); |
| 478 | if (!type) { |
| 479 | return nullptr; |
| 480 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 481 | Token name; |
| 482 | if (this->checkNext(Token::IDENTIFIER, &name)) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 483 | std::unique_ptr<ASTVarDeclarations> result = this->varDeclarationEnd(modifiers, |
| 484 | std::move(type), |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 485 | std::move(name.fText)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 486 | if (result) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 487 | for (const auto& var : result->fVars) { |
| 488 | if (var.fValue) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 489 | this->error(var.fValue->fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 490 | "struct variables cannot be initialized"); |
| 491 | } |
| 492 | } |
| 493 | } |
| 494 | return result; |
| 495 | } |
| 496 | this->expect(Token::SEMICOLON, "';'"); |
| 497 | return nullptr; |
| 498 | } |
| 499 | |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 500 | /* (LBRACKET expression? RBRACKET)* (EQ assignmentExpression)? (COMMA IDENTIFER |
| 501 | (LBRACKET expression? RBRACKET)* (EQ assignmentExpression)?)* SEMICOLON */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 502 | std::unique_ptr<ASTVarDeclarations> Parser::varDeclarationEnd(Modifiers mods, |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 503 | std::unique_ptr<ASTType> type, |
Ethan Nicholas | 0df1b04 | 2017-03-31 13:56:23 -0400 | [diff] [blame] | 504 | String name) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 505 | std::vector<ASTVarDeclaration> vars; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 506 | std::vector<std::unique_ptr<ASTExpression>> currentVarSizes; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 507 | while (this->checkNext(Token::LBRACKET)) { |
| 508 | if (this->checkNext(Token::RBRACKET)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 509 | currentVarSizes.push_back(nullptr); |
| 510 | } else { |
| 511 | std::unique_ptr<ASTExpression> size(this->expression()); |
| 512 | if (!size) { |
| 513 | return nullptr; |
| 514 | } |
| 515 | currentVarSizes.push_back(std::move(size)); |
| 516 | if (!this->expect(Token::RBRACKET, "']'")) { |
| 517 | return nullptr; |
| 518 | } |
| 519 | } |
| 520 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 521 | std::unique_ptr<ASTExpression> value; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 522 | if (this->checkNext(Token::EQ)) { |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 523 | value = this->assignmentExpression(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 524 | if (!value) { |
| 525 | return nullptr; |
| 526 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 527 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 528 | vars.emplace_back(std::move(name), std::move(currentVarSizes), std::move(value)); |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 529 | while (this->checkNext(Token::COMMA)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 530 | Token name; |
| 531 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 532 | return nullptr; |
| 533 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 534 | currentVarSizes.clear(); |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 535 | value.reset(); |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 536 | while (this->checkNext(Token::LBRACKET)) { |
| 537 | if (this->checkNext(Token::RBRACKET)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 538 | currentVarSizes.push_back(nullptr); |
| 539 | } else { |
| 540 | std::unique_ptr<ASTExpression> size(this->expression()); |
| 541 | if (!size) { |
| 542 | return nullptr; |
| 543 | } |
| 544 | currentVarSizes.push_back(std::move(size)); |
| 545 | if (!this->expect(Token::RBRACKET, "']'")) { |
| 546 | return nullptr; |
| 547 | } |
| 548 | } |
| 549 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 550 | if (this->checkNext(Token::EQ)) { |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 551 | value = this->assignmentExpression(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 552 | if (!value) { |
| 553 | return nullptr; |
| 554 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 555 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 556 | vars.emplace_back(std::move(name.fText), std::move(currentVarSizes), std::move(value)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 557 | } |
| 558 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 559 | return nullptr; |
| 560 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 561 | return std::unique_ptr<ASTVarDeclarations>(new ASTVarDeclarations(std::move(mods), |
| 562 | std::move(type), |
| 563 | std::move(vars))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 564 | } |
| 565 | |
| 566 | /* modifiers type IDENTIFIER (LBRACKET INT_LITERAL RBRACKET)? */ |
| 567 | std::unique_ptr<ASTParameter> Parser::parameter() { |
Ethan Nicholas | c6f5e10 | 2017-03-31 14:53:17 -0400 | [diff] [blame] | 568 | Modifiers modifiers = this->modifiersWithDefaults(0); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 569 | std::unique_ptr<ASTType> type = this->type(); |
| 570 | if (!type) { |
| 571 | return nullptr; |
| 572 | } |
| 573 | Token name; |
| 574 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 575 | return nullptr; |
| 576 | } |
| 577 | std::vector<int> sizes; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 578 | while (this->checkNext(Token::LBRACKET)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 579 | Token sizeToken; |
| 580 | if (!this->expect(Token::INT_LITERAL, "a positive integer", &sizeToken)) { |
| 581 | return nullptr; |
| 582 | } |
| 583 | sizes.push_back(SkSL::stoi(sizeToken.fText)); |
| 584 | if (!this->expect(Token::RBRACKET, "']'")) { |
| 585 | return nullptr; |
| 586 | } |
| 587 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 588 | return std::unique_ptr<ASTParameter>(new ASTParameter(name.fPosition, modifiers, |
| 589 | std::move(type), name.fText, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 590 | std::move(sizes))); |
| 591 | } |
| 592 | |
| 593 | /** (EQ INT_LITERAL)? */ |
| 594 | int Parser::layoutInt() { |
| 595 | if (!this->expect(Token::EQ, "'='")) { |
| 596 | return -1; |
| 597 | } |
| 598 | Token resultToken; |
| 599 | if (this->expect(Token::INT_LITERAL, "a non-negative integer", &resultToken)) { |
| 600 | return SkSL::stoi(resultToken.fText); |
| 601 | } |
| 602 | return -1; |
| 603 | } |
| 604 | |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 605 | /** EQ <any sequence of tokens with balanced parentheses and no top-level comma> */ |
| 606 | String Parser::layoutCode() { |
| 607 | if (!this->expect(Token::EQ, "'='")) { |
| 608 | return ""; |
| 609 | } |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 610 | Token start = this->nextRawToken(true); |
| 611 | this->pushback(start); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 612 | String code; |
| 613 | int level = 1; |
| 614 | bool done = false; |
| 615 | while (!done) { |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 616 | Token next = this->nextRawToken(true); |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 617 | switch (next.fKind) { |
| 618 | case Token::LPAREN: |
| 619 | ++level; |
| 620 | break; |
| 621 | case Token::RPAREN: |
| 622 | --level; |
| 623 | break; |
| 624 | case Token::COMMA: |
| 625 | if (level == 1) { |
| 626 | done = true; |
| 627 | } |
| 628 | break; |
| 629 | case Token::END_OF_FILE: |
| 630 | this->error(start.fPosition, "reached end of file while parsing layout"); |
| 631 | return nullptr; |
| 632 | default: |
| 633 | break; |
| 634 | } |
| 635 | if (!level) { |
| 636 | done = true; |
| 637 | } |
Ethan Nicholas | 08b79b7 | 2017-08-14 10:35:37 -0400 | [diff] [blame] | 638 | if (done) { |
| 639 | this->pushback(std::move(next)); |
| 640 | } |
| 641 | else { |
| 642 | code += next.fText; |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 643 | } |
| 644 | } |
| 645 | return code; |
| 646 | } |
| 647 | |
| 648 | /** (EQ IDENTIFIER('identity'))? */ |
| 649 | Layout::Key Parser::layoutKey() { |
| 650 | if (this->peek().fKind == Token::EQ) { |
| 651 | this->expect(Token::EQ, "'='"); |
| 652 | Token key; |
| 653 | if (this->expect(Token::IDENTIFIER, "an identifer", &key)) { |
| 654 | if (key.fText == "identity") { |
| 655 | return Layout::kIdentity_Key; |
| 656 | } else { |
| 657 | this->error(key.fPosition, "unsupported layout key"); |
| 658 | } |
| 659 | } |
| 660 | } |
| 661 | return Layout::kKey_Key; |
| 662 | } |
| 663 | |
ethannicholas | 8ac838d | 2016-11-22 08:39:36 -0800 | [diff] [blame] | 664 | /* LAYOUT LPAREN IDENTIFIER (EQ INT_LITERAL)? (COMMA IDENTIFIER (EQ INT_LITERAL)?)* RPAREN */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 665 | Layout Parser::layout() { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 666 | int location = -1; |
Ethan Nicholas | 1967177 | 2016-11-28 16:30:17 -0500 | [diff] [blame] | 667 | int offset = -1; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 668 | int binding = -1; |
| 669 | int index = -1; |
| 670 | int set = -1; |
| 671 | int builtin = -1; |
Greg Daniel | 64773e6 | 2016-11-22 09:44:03 -0500 | [diff] [blame] | 672 | int inputAttachmentIndex = -1; |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 673 | bool originUpperLeft = false; |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 674 | bool overrideCoverage = false; |
| 675 | bool blendSupportAllEquations = false; |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 676 | Layout::Format format = Layout::Format::kUnspecified; |
ethannicholas | 8ac838d | 2016-11-22 08:39:36 -0800 | [diff] [blame] | 677 | bool pushConstant = false; |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 678 | Layout::Primitive primitive = Layout::kUnspecified_Primitive; |
| 679 | int maxVertices = -1; |
| 680 | int invocations = -1; |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 681 | String when; |
| 682 | Layout::Key key = Layout::kNo_Key; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 683 | if (this->checkNext(Token::LAYOUT)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 684 | if (!this->expect(Token::LPAREN, "'('")) { |
Ethan Nicholas | 1967177 | 2016-11-28 16:30:17 -0500 | [diff] [blame] | 685 | return Layout(location, offset, binding, index, set, builtin, inputAttachmentIndex, |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 686 | originUpperLeft, overrideCoverage, blendSupportAllEquations, format, |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 687 | pushConstant, primitive, maxVertices, invocations, when, key); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 688 | } |
| 689 | for (;;) { |
| 690 | Token t = this->nextToken(); |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 691 | YY_BUFFER_STATE buffer; |
| 692 | buffer = layout_scan_string(t.fText.c_str(), fLayoutScanner); |
| 693 | int token = layoutlex(fLayoutScanner); |
| 694 | layout_delete_buffer(buffer, fLayoutScanner); |
| 695 | if (token != Token::INVALID_TOKEN) { |
| 696 | switch (token) { |
| 697 | case Token::LOCATION: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 698 | location = this->layoutInt(); |
| 699 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 700 | case Token::OFFSET: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 701 | offset = this->layoutInt(); |
| 702 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 703 | case Token::BINDING: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 704 | binding = this->layoutInt(); |
| 705 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 706 | case Token::INDEX: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 707 | index = this->layoutInt(); |
| 708 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 709 | case Token::SET: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 710 | set = this->layoutInt(); |
| 711 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 712 | case Token::BUILTIN: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 713 | builtin = this->layoutInt(); |
| 714 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 715 | case Token::INPUT_ATTACHMENT_INDEX: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 716 | inputAttachmentIndex = this->layoutInt(); |
| 717 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 718 | case Token::ORIGIN_UPPER_LEFT: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 719 | originUpperLeft = true; |
| 720 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 721 | case Token::OVERRIDE_COVERAGE: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 722 | overrideCoverage = true; |
| 723 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 724 | case Token::BLEND_SUPPORT_ALL_EQUATIONS: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 725 | blendSupportAllEquations = true; |
| 726 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 727 | case Token::PUSH_CONSTANT: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 728 | pushConstant = true; |
| 729 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 730 | case Token::POINTS: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 731 | primitive = Layout::kPoints_Primitive; |
| 732 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 733 | case Token::LINES: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 734 | primitive = Layout::kLines_Primitive; |
| 735 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 736 | case Token::LINE_STRIP: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 737 | primitive = Layout::kLineStrip_Primitive; |
| 738 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 739 | case Token::LINES_ADJACENCY: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 740 | primitive = Layout::kLinesAdjacency_Primitive; |
| 741 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 742 | case Token::TRIANGLES: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 743 | primitive = Layout::kTriangles_Primitive; |
| 744 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 745 | case Token::TRIANGLE_STRIP: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 746 | primitive = Layout::kTriangleStrip_Primitive; |
| 747 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 748 | case Token::TRIANGLES_ADJACENCY: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 749 | primitive = Layout::kTrianglesAdjacency_Primitive; |
| 750 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 751 | case Token::MAX_VERTICES: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 752 | maxVertices = this->layoutInt(); |
| 753 | break; |
Ethan Nicholas | bfe15f6 | 2017-03-01 11:46:51 -0500 | [diff] [blame] | 754 | case Token::INVOCATIONS: |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 755 | invocations = this->layoutInt(); |
| 756 | break; |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 757 | case Token::WHEN: |
| 758 | when = this->layoutCode(); |
| 759 | break; |
| 760 | case Token::KEY: |
| 761 | key = this->layoutKey(); |
| 762 | break; |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 763 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 764 | } else if (Layout::ReadFormat(t.fText, &format)) { |
Brian Salomon | 2a51de8 | 2016-11-16 12:06:01 -0500 | [diff] [blame] | 765 | // AST::ReadFormat stored the result in 'format'. |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 766 | } else { |
Greg Daniel | 64773e6 | 2016-11-22 09:44:03 -0500 | [diff] [blame] | 767 | this->error(t.fPosition, ("'" + t.fText + |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 768 | "' is not a valid layout qualifier").c_str()); |
| 769 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 770 | if (this->checkNext(Token::RPAREN)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 771 | break; |
| 772 | } |
| 773 | if (!this->expect(Token::COMMA, "','")) { |
| 774 | break; |
| 775 | } |
| 776 | } |
| 777 | } |
Ethan Nicholas | 1967177 | 2016-11-28 16:30:17 -0500 | [diff] [blame] | 778 | return Layout(location, offset, binding, index, set, builtin, inputAttachmentIndex, |
| 779 | originUpperLeft, overrideCoverage, blendSupportAllEquations, format, |
Ethan Nicholas | 762466e | 2017-06-29 10:03:38 -0400 | [diff] [blame] | 780 | pushConstant, primitive, maxVertices, invocations, when, key); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 781 | } |
| 782 | |
Brian Salomon | f9f4512 | 2016-11-29 11:59:17 -0500 | [diff] [blame] | 783 | /* layout? (UNIFORM | CONST | IN | OUT | INOUT | LOWP | MEDIUMP | HIGHP | FLAT | NOPERSPECTIVE | |
Ethan Nicholas | 0dd30d9 | 2017-05-01 16:57:07 -0400 | [diff] [blame] | 784 | READONLY | WRITEONLY | COHERENT | VOLATILE | RESTRICT | BUFFER)* */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 785 | Modifiers Parser::modifiers() { |
| 786 | Layout layout = this->layout(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 787 | int flags = 0; |
| 788 | for (;;) { |
| 789 | // TODO: handle duplicate / incompatible flags |
| 790 | switch (peek().fKind) { |
| 791 | case Token::UNIFORM: |
| 792 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 793 | flags |= Modifiers::kUniform_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 794 | break; |
| 795 | case Token::CONST: |
| 796 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 797 | flags |= Modifiers::kConst_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 798 | break; |
| 799 | case Token::IN: |
| 800 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 801 | flags |= Modifiers::kIn_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 802 | break; |
| 803 | case Token::OUT: |
| 804 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 805 | flags |= Modifiers::kOut_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 806 | break; |
| 807 | case Token::INOUT: |
| 808 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 809 | flags |= Modifiers::kIn_Flag; |
| 810 | flags |= Modifiers::kOut_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 811 | break; |
| 812 | case Token::LOWP: |
| 813 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 814 | flags |= Modifiers::kLowp_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 815 | break; |
| 816 | case Token::MEDIUMP: |
| 817 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 818 | flags |= Modifiers::kMediump_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 819 | break; |
| 820 | case Token::HIGHP: |
| 821 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 822 | flags |= Modifiers::kHighp_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 823 | break; |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 824 | case Token::FLAT: |
| 825 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 826 | flags |= Modifiers::kFlat_Flag; |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 827 | break; |
| 828 | case Token::NOPERSPECTIVE: |
| 829 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 830 | flags |= Modifiers::kNoPerspective_Flag; |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 831 | break; |
Brian Salomon | f9f4512 | 2016-11-29 11:59:17 -0500 | [diff] [blame] | 832 | case Token::READONLY: |
| 833 | this->nextToken(); |
| 834 | flags |= Modifiers::kReadOnly_Flag; |
| 835 | break; |
| 836 | case Token::WRITEONLY: |
| 837 | this->nextToken(); |
| 838 | flags |= Modifiers::kWriteOnly_Flag; |
| 839 | break; |
| 840 | case Token::COHERENT: |
| 841 | this->nextToken(); |
| 842 | flags |= Modifiers::kCoherent_Flag; |
| 843 | break; |
| 844 | case Token::VOLATILE: |
| 845 | this->nextToken(); |
| 846 | flags |= Modifiers::kVolatile_Flag; |
| 847 | break; |
| 848 | case Token::RESTRICT: |
| 849 | this->nextToken(); |
| 850 | flags |= Modifiers::kRestrict_Flag; |
| 851 | break; |
Ethan Nicholas | 0dd30d9 | 2017-05-01 16:57:07 -0400 | [diff] [blame] | 852 | case Token::BUFFER: |
| 853 | this->nextToken(); |
| 854 | flags |= Modifiers::kBuffer_Flag; |
| 855 | break; |
Ethan Nicholas | cb67096 | 2017-04-20 19:31:52 -0400 | [diff] [blame] | 856 | case Token::HASSIDEEFFECTS: |
| 857 | this->nextToken(); |
| 858 | flags |= Modifiers::kHasSideEffects_Flag; |
| 859 | break; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 860 | default: |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 861 | return Modifiers(layout, flags); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 862 | } |
| 863 | } |
| 864 | } |
| 865 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 866 | Modifiers Parser::modifiersWithDefaults(int defaultFlags) { |
| 867 | Modifiers result = this->modifiers(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 868 | if (!result.fFlags) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 869 | return Modifiers(result.fLayout, defaultFlags); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 870 | } |
| 871 | return result; |
| 872 | } |
| 873 | |
| 874 | /* ifStatement | forStatement | doStatement | whileStatement | block | expression */ |
| 875 | std::unique_ptr<ASTStatement> Parser::statement() { |
| 876 | Token start = this->peek(); |
| 877 | switch (start.fKind) { |
Ethan Nicholas | 5ac13c2 | 2017-05-10 15:06:17 -0400 | [diff] [blame] | 878 | case Token::IF: // fall through |
| 879 | case Token::STATIC_IF: |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 880 | return this->ifStatement(); |
| 881 | case Token::FOR: |
| 882 | return this->forStatement(); |
| 883 | case Token::DO: |
| 884 | return this->doStatement(); |
| 885 | case Token::WHILE: |
| 886 | return this->whileStatement(); |
Ethan Nicholas | 5ac13c2 | 2017-05-10 15:06:17 -0400 | [diff] [blame] | 887 | case Token::SWITCH: // fall through |
| 888 | case Token::STATIC_SWITCH: |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 889 | return this->switchStatement(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 890 | case Token::RETURN: |
| 891 | return this->returnStatement(); |
| 892 | case Token::BREAK: |
| 893 | return this->breakStatement(); |
| 894 | case Token::CONTINUE: |
| 895 | return this->continueStatement(); |
| 896 | case Token::DISCARD: |
| 897 | return this->discardStatement(); |
| 898 | case Token::LBRACE: |
| 899 | return this->block(); |
| 900 | case Token::SEMICOLON: |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 901 | this->nextToken(); |
| 902 | return std::unique_ptr<ASTStatement>(new ASTBlock(start.fPosition, |
ethannicholas | 0730be7 | 2016-09-01 07:59:02 -0700 | [diff] [blame] | 903 | std::vector<std::unique_ptr<ASTStatement>>())); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 904 | case Token::CONST: // fall through |
| 905 | case Token::HIGHP: // fall through |
| 906 | case Token::MEDIUMP: // fall through |
| 907 | case Token::LOWP: { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 908 | auto decl = this->varDeclarations(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 909 | if (!decl) { |
| 910 | return nullptr; |
| 911 | } |
| 912 | return std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement(std::move(decl))); |
| 913 | } |
| 914 | case Token::IDENTIFIER: |
| 915 | if (this->isType(start.fText)) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 916 | auto decl = this->varDeclarations(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 917 | if (!decl) { |
| 918 | return nullptr; |
| 919 | } |
| 920 | return std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement( |
| 921 | std::move(decl))); |
| 922 | } |
| 923 | // fall through |
| 924 | default: |
| 925 | return this->expressionStatement(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 926 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 927 | } |
| 928 | |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 929 | /* IDENTIFIER(type) (LBRACKET intLiteral? RBRACKET)* */ |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 930 | std::unique_ptr<ASTType> Parser::type() { |
| 931 | Token type; |
| 932 | if (!this->expect(Token::IDENTIFIER, "a type", &type)) { |
| 933 | return nullptr; |
| 934 | } |
| 935 | if (!this->isType(type.fText)) { |
| 936 | this->error(type.fPosition, ("no type named '" + type.fText + "'").c_str()); |
| 937 | return nullptr; |
| 938 | } |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 939 | std::vector<int> sizes; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 940 | while (this->checkNext(Token::LBRACKET)) { |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 941 | if (this->peek().fKind != Token::RBRACKET) { |
| 942 | int64_t i; |
| 943 | if (this->intLiteral(&i)) { |
| 944 | sizes.push_back(i); |
| 945 | } else { |
| 946 | return nullptr; |
| 947 | } |
| 948 | } else { |
| 949 | sizes.push_back(-1); |
| 950 | } |
| 951 | this->expect(Token::RBRACKET, "']'"); |
| 952 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 953 | return std::unique_ptr<ASTType>(new ASTType(type.fPosition, std::move(type.fText), |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 954 | ASTType::kIdentifier_Kind, sizes)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 955 | } |
| 956 | |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 957 | /* IDENTIFIER LBRACE varDeclaration* RBRACE (IDENTIFIER (LBRACKET expression? RBRACKET)*)? */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 958 | std::unique_ptr<ASTDeclaration> Parser::interfaceBlock(Modifiers mods) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 959 | Token name; |
| 960 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 961 | return nullptr; |
| 962 | } |
| 963 | if (peek().fKind != Token::LBRACE) { |
| 964 | // 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] | 965 | // 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] | 966 | // it's better to report it as an unknown type |
| 967 | this->error(name.fPosition, "no type named '" + name.fText + "'"); |
| 968 | return nullptr; |
| 969 | } |
| 970 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 971 | std::vector<std::unique_ptr<ASTVarDeclarations>> decls; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 972 | while (this->peek().fKind != Token::RBRACE) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 973 | std::unique_ptr<ASTVarDeclarations> decl = this->varDeclarations(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 974 | if (!decl) { |
| 975 | return nullptr; |
| 976 | } |
| 977 | decls.push_back(std::move(decl)); |
| 978 | } |
| 979 | this->nextToken(); |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 980 | std::vector<std::unique_ptr<ASTExpression>> sizes; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 981 | Token instanceName; |
| 982 | if (this->checkNext(Token::IDENTIFIER, &instanceName)) { |
| 983 | while (this->checkNext(Token::LBRACKET)) { |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 984 | if (this->peek().fKind != Token::RBRACKET) { |
| 985 | std::unique_ptr<ASTExpression> size = this->expression(); |
| 986 | if (!size) { |
| 987 | return nullptr; |
| 988 | } |
| 989 | sizes.push_back(std::move(size)); |
| 990 | } else { |
| 991 | sizes.push_back(nullptr); |
| 992 | } |
| 993 | this->expect(Token::RBRACKET, "']'"); |
| 994 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 995 | } |
| 996 | this->expect(Token::SEMICOLON, "';'"); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 997 | return std::unique_ptr<ASTDeclaration>(new ASTInterfaceBlock(name.fPosition, mods, |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 998 | std::move(name.fText), |
| 999 | std::move(decls), |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1000 | std::move(instanceName.fText), |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 1001 | std::move(sizes))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1002 | } |
| 1003 | |
| 1004 | /* IF LPAREN expression RPAREN statement (ELSE statement)? */ |
| 1005 | std::unique_ptr<ASTIfStatement> Parser::ifStatement() { |
| 1006 | Token start; |
Ethan Nicholas | 5ac13c2 | 2017-05-10 15:06:17 -0400 | [diff] [blame] | 1007 | bool isStatic = this->checkNext(Token::STATIC_IF, &start); |
| 1008 | if (!isStatic && !this->expect(Token::IF, "'if'", &start)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1009 | return nullptr; |
| 1010 | } |
| 1011 | if (!this->expect(Token::LPAREN, "'('")) { |
| 1012 | return nullptr; |
| 1013 | } |
| 1014 | std::unique_ptr<ASTExpression> test(this->expression()); |
| 1015 | if (!test) { |
| 1016 | return nullptr; |
| 1017 | } |
| 1018 | if (!this->expect(Token::RPAREN, "')'")) { |
| 1019 | return nullptr; |
| 1020 | } |
| 1021 | std::unique_ptr<ASTStatement> ifTrue(this->statement()); |
| 1022 | if (!ifTrue) { |
| 1023 | return nullptr; |
| 1024 | } |
| 1025 | std::unique_ptr<ASTStatement> ifFalse; |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1026 | if (this->checkNext(Token::ELSE)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1027 | ifFalse = this->statement(); |
| 1028 | if (!ifFalse) { |
| 1029 | return nullptr; |
| 1030 | } |
| 1031 | } |
Ethan Nicholas | 5ac13c2 | 2017-05-10 15:06:17 -0400 | [diff] [blame] | 1032 | return std::unique_ptr<ASTIfStatement>(new ASTIfStatement(start.fPosition, |
| 1033 | isStatic, |
| 1034 | std::move(test), |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1035 | std::move(ifTrue), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1036 | std::move(ifFalse))); |
| 1037 | } |
| 1038 | |
| 1039 | /* DO statement WHILE LPAREN expression RPAREN SEMICOLON */ |
| 1040 | std::unique_ptr<ASTDoStatement> Parser::doStatement() { |
| 1041 | Token start; |
| 1042 | if (!this->expect(Token::DO, "'do'", &start)) { |
| 1043 | return nullptr; |
| 1044 | } |
| 1045 | std::unique_ptr<ASTStatement> statement(this->statement()); |
| 1046 | if (!statement) { |
| 1047 | return nullptr; |
| 1048 | } |
| 1049 | if (!this->expect(Token::WHILE, "'while'")) { |
| 1050 | return nullptr; |
| 1051 | } |
| 1052 | if (!this->expect(Token::LPAREN, "'('")) { |
| 1053 | return nullptr; |
| 1054 | } |
| 1055 | std::unique_ptr<ASTExpression> test(this->expression()); |
| 1056 | if (!test) { |
| 1057 | return nullptr; |
| 1058 | } |
| 1059 | if (!this->expect(Token::RPAREN, "')'")) { |
| 1060 | return nullptr; |
| 1061 | } |
| 1062 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1063 | return nullptr; |
| 1064 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1065 | return std::unique_ptr<ASTDoStatement>(new ASTDoStatement(start.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1066 | std::move(statement), |
| 1067 | std::move(test))); |
| 1068 | } |
| 1069 | |
| 1070 | /* WHILE LPAREN expression RPAREN STATEMENT */ |
| 1071 | std::unique_ptr<ASTWhileStatement> Parser::whileStatement() { |
| 1072 | Token start; |
| 1073 | if (!this->expect(Token::WHILE, "'while'", &start)) { |
| 1074 | return nullptr; |
| 1075 | } |
| 1076 | if (!this->expect(Token::LPAREN, "'('")) { |
| 1077 | return nullptr; |
| 1078 | } |
| 1079 | std::unique_ptr<ASTExpression> test(this->expression()); |
| 1080 | if (!test) { |
| 1081 | return nullptr; |
| 1082 | } |
| 1083 | if (!this->expect(Token::RPAREN, "')'")) { |
| 1084 | return nullptr; |
| 1085 | } |
| 1086 | std::unique_ptr<ASTStatement> statement(this->statement()); |
| 1087 | if (!statement) { |
| 1088 | return nullptr; |
| 1089 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1090 | return std::unique_ptr<ASTWhileStatement>(new ASTWhileStatement(start.fPosition, |
| 1091 | std::move(test), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1092 | std::move(statement))); |
| 1093 | } |
| 1094 | |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 1095 | /* CASE expression COLON statement* */ |
| 1096 | std::unique_ptr<ASTSwitchCase> Parser::switchCase() { |
| 1097 | Token start; |
| 1098 | if (!this->expect(Token::CASE, "'case'", &start)) { |
| 1099 | return nullptr; |
| 1100 | } |
| 1101 | std::unique_ptr<ASTExpression> value = this->expression(); |
| 1102 | if (!value) { |
| 1103 | return nullptr; |
| 1104 | } |
| 1105 | if (!this->expect(Token::COLON, "':'")) { |
| 1106 | return nullptr; |
| 1107 | } |
| 1108 | std::vector<std::unique_ptr<ASTStatement>> statements; |
| 1109 | while (this->peek().fKind != Token::RBRACE && this->peek().fKind != Token::CASE && |
| 1110 | this->peek().fKind != Token::DEFAULT) { |
| 1111 | std::unique_ptr<ASTStatement> s = this->statement(); |
| 1112 | if (!s) { |
| 1113 | return nullptr; |
| 1114 | } |
| 1115 | statements.push_back(std::move(s)); |
| 1116 | } |
| 1117 | return std::unique_ptr<ASTSwitchCase>(new ASTSwitchCase(start.fPosition, std::move(value), |
| 1118 | std::move(statements))); |
| 1119 | } |
| 1120 | |
| 1121 | /* SWITCH LPAREN expression RPAREN LBRACE switchCase* (DEFAULT COLON statement*)? RBRACE */ |
| 1122 | std::unique_ptr<ASTStatement> Parser::switchStatement() { |
| 1123 | Token start; |
Ethan Nicholas | 5ac13c2 | 2017-05-10 15:06:17 -0400 | [diff] [blame] | 1124 | bool isStatic = this->checkNext(Token::STATIC_SWITCH, &start); |
| 1125 | if (!isStatic && !this->expect(Token::SWITCH, "'switch'", &start)) { |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 1126 | return nullptr; |
| 1127 | } |
| 1128 | if (!this->expect(Token::LPAREN, "'('")) { |
| 1129 | return nullptr; |
| 1130 | } |
| 1131 | std::unique_ptr<ASTExpression> value(this->expression()); |
| 1132 | if (!value) { |
| 1133 | return nullptr; |
| 1134 | } |
| 1135 | if (!this->expect(Token::RPAREN, "')'")) { |
| 1136 | return nullptr; |
| 1137 | } |
| 1138 | if (!this->expect(Token::LBRACE, "'{'")) { |
| 1139 | return nullptr; |
| 1140 | } |
| 1141 | std::vector<std::unique_ptr<ASTSwitchCase>> cases; |
| 1142 | while (this->peek().fKind == Token::CASE) { |
| 1143 | std::unique_ptr<ASTSwitchCase> c = this->switchCase(); |
| 1144 | if (!c) { |
| 1145 | return nullptr; |
| 1146 | } |
| 1147 | cases.push_back(std::move(c)); |
| 1148 | } |
| 1149 | // Requiring default: to be last (in defiance of C and GLSL) was a deliberate decision. Other |
| 1150 | // parts of the compiler may rely upon this assumption. |
| 1151 | if (this->peek().fKind == Token::DEFAULT) { |
| 1152 | Token defaultStart; |
Ethan Nicholas | 0df1b04 | 2017-03-31 13:56:23 -0400 | [diff] [blame] | 1153 | ASSERT_RESULT(this->expect(Token::DEFAULT, "'default'", &defaultStart)); |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 1154 | if (!this->expect(Token::COLON, "':'")) { |
| 1155 | return nullptr; |
| 1156 | } |
| 1157 | std::vector<std::unique_ptr<ASTStatement>> statements; |
| 1158 | while (this->peek().fKind != Token::RBRACE) { |
| 1159 | std::unique_ptr<ASTStatement> s = this->statement(); |
| 1160 | if (!s) { |
| 1161 | return nullptr; |
| 1162 | } |
| 1163 | statements.push_back(std::move(s)); |
| 1164 | } |
| 1165 | cases.emplace_back(new ASTSwitchCase(defaultStart.fPosition, nullptr, |
| 1166 | std::move(statements))); |
| 1167 | } |
| 1168 | if (!this->expect(Token::RBRACE, "'}'")) { |
| 1169 | return nullptr; |
| 1170 | } |
| 1171 | return std::unique_ptr<ASTStatement>(new ASTSwitchStatement(start.fPosition, |
Ethan Nicholas | 5ac13c2 | 2017-05-10 15:06:17 -0400 | [diff] [blame] | 1172 | isStatic, |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame] | 1173 | std::move(value), |
| 1174 | std::move(cases))); |
| 1175 | } |
| 1176 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1177 | /* FOR LPAREN (declaration | expression)? SEMICOLON expression? SEMICOLON expression? RPAREN |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1178 | STATEMENT */ |
| 1179 | std::unique_ptr<ASTForStatement> Parser::forStatement() { |
| 1180 | Token start; |
| 1181 | if (!this->expect(Token::FOR, "'for'", &start)) { |
| 1182 | return nullptr; |
| 1183 | } |
| 1184 | if (!this->expect(Token::LPAREN, "'('")) { |
| 1185 | return nullptr; |
| 1186 | } |
| 1187 | std::unique_ptr<ASTStatement> initializer; |
| 1188 | Token nextToken = this->peek(); |
| 1189 | switch (nextToken.fKind) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1190 | case Token::SEMICOLON: |
ethannicholas | 22f939e | 2016-10-13 13:25:34 -0700 | [diff] [blame] | 1191 | this->nextToken(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1192 | break; |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1193 | case Token::CONST: { |
| 1194 | std::unique_ptr<ASTVarDeclarations> vd = this->varDeclarations(); |
| 1195 | if (!vd) { |
| 1196 | return nullptr; |
| 1197 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1198 | initializer = std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement( |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1199 | std::move(vd))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1200 | break; |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1201 | } |
| 1202 | case Token::IDENTIFIER: { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1203 | if (this->isType(nextToken.fText)) { |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1204 | std::unique_ptr<ASTVarDeclarations> vd = this->varDeclarations(); |
| 1205 | if (!vd) { |
| 1206 | return nullptr; |
| 1207 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1208 | initializer = std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement( |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1209 | std::move(vd))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1210 | break; |
| 1211 | } |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1212 | } // fall through |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1213 | default: |
| 1214 | initializer = this->expressionStatement(); |
| 1215 | } |
| 1216 | std::unique_ptr<ASTExpression> test; |
| 1217 | if (this->peek().fKind != Token::SEMICOLON) { |
| 1218 | test = this->expression(); |
| 1219 | if (!test) { |
| 1220 | return nullptr; |
| 1221 | } |
| 1222 | } |
| 1223 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1224 | return nullptr; |
| 1225 | } |
| 1226 | std::unique_ptr<ASTExpression> next; |
ethannicholas | 22f939e | 2016-10-13 13:25:34 -0700 | [diff] [blame] | 1227 | if (this->peek().fKind != Token::RPAREN) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1228 | next = this->expression(); |
| 1229 | if (!next) { |
| 1230 | return nullptr; |
| 1231 | } |
| 1232 | } |
| 1233 | if (!this->expect(Token::RPAREN, "')'")) { |
| 1234 | return nullptr; |
| 1235 | } |
| 1236 | std::unique_ptr<ASTStatement> statement(this->statement()); |
| 1237 | if (!statement) { |
| 1238 | return nullptr; |
| 1239 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1240 | return std::unique_ptr<ASTForStatement>(new ASTForStatement(start.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1241 | std::move(initializer), |
| 1242 | std::move(test), std::move(next), |
| 1243 | std::move(statement))); |
| 1244 | } |
| 1245 | |
| 1246 | /* RETURN expression? SEMICOLON */ |
| 1247 | std::unique_ptr<ASTReturnStatement> Parser::returnStatement() { |
| 1248 | Token start; |
| 1249 | if (!this->expect(Token::RETURN, "'return'", &start)) { |
| 1250 | return nullptr; |
| 1251 | } |
| 1252 | std::unique_ptr<ASTExpression> expression; |
| 1253 | if (this->peek().fKind != Token::SEMICOLON) { |
| 1254 | expression = this->expression(); |
| 1255 | if (!expression) { |
| 1256 | return nullptr; |
| 1257 | } |
| 1258 | } |
| 1259 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1260 | return nullptr; |
| 1261 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1262 | return std::unique_ptr<ASTReturnStatement>(new ASTReturnStatement(start.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1263 | std::move(expression))); |
| 1264 | } |
| 1265 | |
| 1266 | /* BREAK SEMICOLON */ |
| 1267 | std::unique_ptr<ASTBreakStatement> Parser::breakStatement() { |
| 1268 | Token start; |
| 1269 | if (!this->expect(Token::BREAK, "'break'", &start)) { |
| 1270 | return nullptr; |
| 1271 | } |
| 1272 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1273 | return nullptr; |
| 1274 | } |
| 1275 | return std::unique_ptr<ASTBreakStatement>(new ASTBreakStatement(start.fPosition)); |
| 1276 | } |
| 1277 | |
| 1278 | /* CONTINUE SEMICOLON */ |
| 1279 | std::unique_ptr<ASTContinueStatement> Parser::continueStatement() { |
| 1280 | Token start; |
| 1281 | if (!this->expect(Token::CONTINUE, "'continue'", &start)) { |
| 1282 | return nullptr; |
| 1283 | } |
| 1284 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1285 | return nullptr; |
| 1286 | } |
| 1287 | return std::unique_ptr<ASTContinueStatement>(new ASTContinueStatement(start.fPosition)); |
| 1288 | } |
| 1289 | |
| 1290 | /* DISCARD SEMICOLON */ |
| 1291 | std::unique_ptr<ASTDiscardStatement> Parser::discardStatement() { |
| 1292 | Token start; |
| 1293 | if (!this->expect(Token::DISCARD, "'continue'", &start)) { |
| 1294 | return nullptr; |
| 1295 | } |
| 1296 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1297 | return nullptr; |
| 1298 | } |
| 1299 | return std::unique_ptr<ASTDiscardStatement>(new ASTDiscardStatement(start.fPosition)); |
| 1300 | } |
| 1301 | |
| 1302 | /* LBRACE statement* RBRACE */ |
| 1303 | std::unique_ptr<ASTBlock> Parser::block() { |
ethannicholas | cad6416 | 2016-10-27 10:54:02 -0700 | [diff] [blame] | 1304 | AutoDepth depth(this); |
| 1305 | if (!depth.checkValid()) { |
| 1306 | return nullptr; |
| 1307 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1308 | Token start; |
| 1309 | if (!this->expect(Token::LBRACE, "'{'", &start)) { |
| 1310 | return nullptr; |
| 1311 | } |
| 1312 | std::vector<std::unique_ptr<ASTStatement>> statements; |
| 1313 | for (;;) { |
| 1314 | switch (this->peek().fKind) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1315 | case Token::RBRACE: |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1316 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1317 | return std::unique_ptr<ASTBlock>(new ASTBlock(start.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1318 | std::move(statements))); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1319 | case Token::END_OF_FILE: |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1320 | this->error(this->peek().fPosition, "expected '}', but found end of file"); |
| 1321 | return nullptr; |
| 1322 | default: { |
| 1323 | std::unique_ptr<ASTStatement> statement = this->statement(); |
| 1324 | if (!statement) { |
| 1325 | return nullptr; |
| 1326 | } |
| 1327 | statements.push_back(std::move(statement)); |
| 1328 | } |
| 1329 | } |
| 1330 | } |
| 1331 | } |
| 1332 | |
| 1333 | /* expression SEMICOLON */ |
| 1334 | std::unique_ptr<ASTExpressionStatement> Parser::expressionStatement() { |
| 1335 | std::unique_ptr<ASTExpression> expr = this->expression(); |
| 1336 | if (expr) { |
| 1337 | if (this->expect(Token::SEMICOLON, "';'")) { |
| 1338 | ASTExpressionStatement* result = new ASTExpressionStatement(std::move(expr)); |
| 1339 | return std::unique_ptr<ASTExpressionStatement>(result); |
| 1340 | } |
| 1341 | } |
| 1342 | return nullptr; |
| 1343 | } |
| 1344 | |
| 1345 | /* assignmentExpression */ |
| 1346 | std::unique_ptr<ASTExpression> Parser::expression() { |
ethannicholas | cad6416 | 2016-10-27 10:54:02 -0700 | [diff] [blame] | 1347 | AutoDepth depth(this); |
| 1348 | if (!depth.checkValid()) { |
| 1349 | return nullptr; |
| 1350 | } |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 1351 | return this->commaExpression(); |
| 1352 | } |
| 1353 | |
| 1354 | /* assignmentExpression (COMMA assignmentExpression)* */ |
| 1355 | std::unique_ptr<ASTExpression> Parser::commaExpression() { |
| 1356 | std::unique_ptr<ASTExpression> result = this->assignmentExpression(); |
| 1357 | if (!result) { |
| 1358 | return nullptr; |
| 1359 | } |
| 1360 | Token t; |
| 1361 | while (this->checkNext(Token::COMMA, &t)) { |
| 1362 | std::unique_ptr<ASTExpression> right = this->commaExpression(); |
| 1363 | if (!right) { |
| 1364 | return nullptr; |
| 1365 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1366 | 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] | 1367 | } |
| 1368 | return result; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1369 | } |
| 1370 | |
| 1371 | /* ternaryExpression ((EQEQ | STAREQ | SLASHEQ | PERCENTEQ | PLUSEQ | MINUSEQ | SHLEQ | SHREQ | |
| 1372 | BITWISEANDEQ | BITWISEXOREQ | BITWISEOREQ | LOGICALANDEQ | LOGICALXOREQ | LOGICALOREQ) |
| 1373 | assignmentExpression)* |
| 1374 | */ |
| 1375 | std::unique_ptr<ASTExpression> Parser::assignmentExpression() { |
| 1376 | std::unique_ptr<ASTExpression> result = this->ternaryExpression(); |
| 1377 | if (!result) { |
| 1378 | return nullptr; |
| 1379 | } |
| 1380 | for (;;) { |
| 1381 | switch (this->peek().fKind) { |
| 1382 | case Token::EQ: // fall through |
| 1383 | case Token::STAREQ: // fall through |
| 1384 | case Token::SLASHEQ: // fall through |
| 1385 | case Token::PERCENTEQ: // fall through |
| 1386 | case Token::PLUSEQ: // fall through |
| 1387 | case Token::MINUSEQ: // fall through |
| 1388 | case Token::SHLEQ: // fall through |
| 1389 | case Token::SHREQ: // fall through |
| 1390 | case Token::BITWISEANDEQ: // fall through |
| 1391 | case Token::BITWISEXOREQ: // fall through |
| 1392 | case Token::BITWISEOREQ: // fall through |
| 1393 | case Token::LOGICALANDEQ: // fall through |
| 1394 | case Token::LOGICALXOREQ: // fall through |
| 1395 | case Token::LOGICALOREQ: { |
| 1396 | Token t = this->nextToken(); |
| 1397 | std::unique_ptr<ASTExpression> right = this->assignmentExpression(); |
| 1398 | if (!right) { |
| 1399 | return nullptr; |
| 1400 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1401 | result = std::unique_ptr<ASTExpression>(new ASTBinaryExpression(std::move(result), |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1402 | std::move(t), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1403 | std::move(right))); |
| 1404 | } |
| 1405 | default: |
| 1406 | return result; |
| 1407 | } |
| 1408 | } |
| 1409 | } |
| 1410 | |
| 1411 | /* logicalOrExpression ('?' expression ':' assignmentExpression)? */ |
| 1412 | std::unique_ptr<ASTExpression> Parser::ternaryExpression() { |
| 1413 | std::unique_ptr<ASTExpression> result = this->logicalOrExpression(); |
| 1414 | if (!result) { |
| 1415 | return nullptr; |
| 1416 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1417 | if (this->checkNext(Token::QUESTION)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1418 | std::unique_ptr<ASTExpression> trueExpr = this->expression(); |
| 1419 | if (!trueExpr) { |
| 1420 | return nullptr; |
| 1421 | } |
| 1422 | if (this->expect(Token::COLON, "':'")) { |
| 1423 | std::unique_ptr<ASTExpression> falseExpr = this->assignmentExpression(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1424 | return std::unique_ptr<ASTExpression>(new ASTTernaryExpression(std::move(result), |
| 1425 | std::move(trueExpr), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1426 | std::move(falseExpr))); |
| 1427 | } |
| 1428 | return nullptr; |
| 1429 | } |
| 1430 | return result; |
| 1431 | } |
| 1432 | |
| 1433 | /* logicalXorExpression (LOGICALOR logicalXorExpression)* */ |
| 1434 | std::unique_ptr<ASTExpression> Parser::logicalOrExpression() { |
| 1435 | std::unique_ptr<ASTExpression> result = this->logicalXorExpression(); |
| 1436 | if (!result) { |
| 1437 | return nullptr; |
| 1438 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1439 | Token t; |
| 1440 | while (this->checkNext(Token::LOGICALOR, &t)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1441 | std::unique_ptr<ASTExpression> right = this->logicalXorExpression(); |
| 1442 | if (!right) { |
| 1443 | return nullptr; |
| 1444 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1445 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1446 | } |
| 1447 | return result; |
| 1448 | } |
| 1449 | |
| 1450 | /* logicalAndExpression (LOGICALXOR logicalAndExpression)* */ |
| 1451 | std::unique_ptr<ASTExpression> Parser::logicalXorExpression() { |
| 1452 | std::unique_ptr<ASTExpression> result = this->logicalAndExpression(); |
| 1453 | if (!result) { |
| 1454 | return nullptr; |
| 1455 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1456 | Token t; |
| 1457 | while (this->checkNext(Token::LOGICALXOR, &t)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1458 | std::unique_ptr<ASTExpression> right = this->logicalAndExpression(); |
| 1459 | if (!right) { |
| 1460 | return nullptr; |
| 1461 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1462 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1463 | } |
| 1464 | return result; |
| 1465 | } |
| 1466 | |
| 1467 | /* bitwiseOrExpression (LOGICALAND bitwiseOrExpression)* */ |
| 1468 | std::unique_ptr<ASTExpression> Parser::logicalAndExpression() { |
| 1469 | std::unique_ptr<ASTExpression> result = this->bitwiseOrExpression(); |
| 1470 | if (!result) { |
| 1471 | return nullptr; |
| 1472 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1473 | Token t; |
| 1474 | while (this->checkNext(Token::LOGICALAND, &t)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1475 | std::unique_ptr<ASTExpression> right = this->bitwiseOrExpression(); |
| 1476 | if (!right) { |
| 1477 | return nullptr; |
| 1478 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1479 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1480 | } |
| 1481 | return result; |
| 1482 | } |
| 1483 | |
| 1484 | /* bitwiseXorExpression (BITWISEOR bitwiseXorExpression)* */ |
| 1485 | std::unique_ptr<ASTExpression> Parser::bitwiseOrExpression() { |
| 1486 | std::unique_ptr<ASTExpression> result = this->bitwiseXorExpression(); |
| 1487 | if (!result) { |
| 1488 | return nullptr; |
| 1489 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1490 | Token t; |
| 1491 | while (this->checkNext(Token::BITWISEOR, &t)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1492 | std::unique_ptr<ASTExpression> right = this->bitwiseXorExpression(); |
| 1493 | if (!right) { |
| 1494 | return nullptr; |
| 1495 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1496 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1497 | } |
| 1498 | return result; |
| 1499 | } |
| 1500 | |
| 1501 | /* bitwiseAndExpression (BITWISEXOR bitwiseAndExpression)* */ |
| 1502 | std::unique_ptr<ASTExpression> Parser::bitwiseXorExpression() { |
| 1503 | std::unique_ptr<ASTExpression> result = this->bitwiseAndExpression(); |
| 1504 | if (!result) { |
| 1505 | return nullptr; |
| 1506 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1507 | Token t; |
| 1508 | while (this->checkNext(Token::BITWISEXOR, &t)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1509 | std::unique_ptr<ASTExpression> right = this->bitwiseAndExpression(); |
| 1510 | if (!right) { |
| 1511 | return nullptr; |
| 1512 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1513 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1514 | } |
| 1515 | return result; |
| 1516 | } |
| 1517 | |
| 1518 | /* equalityExpression (BITWISEAND equalityExpression)* */ |
| 1519 | std::unique_ptr<ASTExpression> Parser::bitwiseAndExpression() { |
| 1520 | std::unique_ptr<ASTExpression> result = this->equalityExpression(); |
| 1521 | if (!result) { |
| 1522 | return nullptr; |
| 1523 | } |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1524 | Token t; |
| 1525 | while (this->checkNext(Token::BITWISEAND, &t)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1526 | std::unique_ptr<ASTExpression> right = this->equalityExpression(); |
| 1527 | if (!right) { |
| 1528 | return nullptr; |
| 1529 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1530 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1531 | } |
| 1532 | return result; |
| 1533 | } |
| 1534 | |
| 1535 | /* relationalExpression ((EQEQ | NEQ) relationalExpression)* */ |
| 1536 | std::unique_ptr<ASTExpression> Parser::equalityExpression() { |
| 1537 | std::unique_ptr<ASTExpression> result = this->relationalExpression(); |
| 1538 | if (!result) { |
| 1539 | return nullptr; |
| 1540 | } |
| 1541 | for (;;) { |
| 1542 | switch (this->peek().fKind) { |
| 1543 | case Token::EQEQ: // fall through |
| 1544 | case Token::NEQ: { |
| 1545 | Token t = this->nextToken(); |
| 1546 | std::unique_ptr<ASTExpression> right = this->relationalExpression(); |
| 1547 | if (!right) { |
| 1548 | return nullptr; |
| 1549 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1550 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1551 | break; |
| 1552 | } |
| 1553 | default: |
| 1554 | return result; |
| 1555 | } |
| 1556 | } |
| 1557 | } |
| 1558 | |
| 1559 | /* shiftExpression ((LT | GT | LTEQ | GTEQ) shiftExpression)* */ |
| 1560 | std::unique_ptr<ASTExpression> Parser::relationalExpression() { |
| 1561 | std::unique_ptr<ASTExpression> result = this->shiftExpression(); |
| 1562 | if (!result) { |
| 1563 | return nullptr; |
| 1564 | } |
| 1565 | for (;;) { |
| 1566 | switch (this->peek().fKind) { |
| 1567 | case Token::LT: // fall through |
| 1568 | case Token::GT: // fall through |
| 1569 | case Token::LTEQ: // fall through |
| 1570 | case Token::GTEQ: { |
| 1571 | Token t = this->nextToken(); |
| 1572 | std::unique_ptr<ASTExpression> right = this->shiftExpression(); |
| 1573 | if (!right) { |
| 1574 | return nullptr; |
| 1575 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1576 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), |
| 1577 | std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1578 | break; |
| 1579 | } |
| 1580 | default: |
| 1581 | return result; |
| 1582 | } |
| 1583 | } |
| 1584 | } |
| 1585 | |
| 1586 | /* additiveExpression ((SHL | SHR) additiveExpression)* */ |
| 1587 | std::unique_ptr<ASTExpression> Parser::shiftExpression() { |
| 1588 | std::unique_ptr<ASTExpression> result = this->additiveExpression(); |
| 1589 | if (!result) { |
| 1590 | return nullptr; |
| 1591 | } |
| 1592 | for (;;) { |
| 1593 | switch (this->peek().fKind) { |
| 1594 | case Token::SHL: // fall through |
| 1595 | case Token::SHR: { |
| 1596 | Token t = this->nextToken(); |
| 1597 | std::unique_ptr<ASTExpression> right = this->additiveExpression(); |
| 1598 | if (!right) { |
| 1599 | return nullptr; |
| 1600 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1601 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), |
| 1602 | std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1603 | break; |
| 1604 | } |
| 1605 | default: |
| 1606 | return result; |
| 1607 | } |
| 1608 | } |
| 1609 | } |
| 1610 | |
| 1611 | /* multiplicativeExpression ((PLUS | MINUS) multiplicativeExpression)* */ |
| 1612 | std::unique_ptr<ASTExpression> Parser::additiveExpression() { |
| 1613 | std::unique_ptr<ASTExpression> result = this->multiplicativeExpression(); |
| 1614 | if (!result) { |
| 1615 | return nullptr; |
| 1616 | } |
| 1617 | for (;;) { |
| 1618 | switch (this->peek().fKind) { |
| 1619 | case Token::PLUS: // fall through |
| 1620 | case Token::MINUS: { |
| 1621 | Token t = this->nextToken(); |
| 1622 | std::unique_ptr<ASTExpression> right = this->multiplicativeExpression(); |
| 1623 | if (!right) { |
| 1624 | return nullptr; |
| 1625 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1626 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), |
| 1627 | std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1628 | break; |
| 1629 | } |
| 1630 | default: |
| 1631 | return result; |
| 1632 | } |
| 1633 | } |
| 1634 | } |
| 1635 | |
| 1636 | /* unaryExpression ((STAR | SLASH | PERCENT) unaryExpression)* */ |
| 1637 | std::unique_ptr<ASTExpression> Parser::multiplicativeExpression() { |
| 1638 | std::unique_ptr<ASTExpression> result = this->unaryExpression(); |
| 1639 | if (!result) { |
| 1640 | return nullptr; |
| 1641 | } |
| 1642 | for (;;) { |
| 1643 | switch (this->peek().fKind) { |
| 1644 | case Token::STAR: // fall through |
| 1645 | case Token::SLASH: // fall through |
| 1646 | case Token::PERCENT: { |
| 1647 | Token t = this->nextToken(); |
| 1648 | std::unique_ptr<ASTExpression> right = this->unaryExpression(); |
| 1649 | if (!right) { |
| 1650 | return nullptr; |
| 1651 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1652 | result.reset(new ASTBinaryExpression(std::move(result), std::move(t), |
| 1653 | std::move(right))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1654 | break; |
| 1655 | } |
| 1656 | default: |
| 1657 | return result; |
| 1658 | } |
| 1659 | } |
| 1660 | } |
| 1661 | |
| 1662 | /* postfixExpression | (PLUS | MINUS | NOT | PLUSPLUS | MINUSMINUS) unaryExpression */ |
| 1663 | std::unique_ptr<ASTExpression> Parser::unaryExpression() { |
| 1664 | switch (this->peek().fKind) { |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 1665 | case Token::PLUS: // fall through |
| 1666 | case Token::MINUS: // fall through |
| 1667 | case Token::LOGICALNOT: // fall through |
| 1668 | case Token::BITWISENOT: // fall through |
| 1669 | case Token::PLUSPLUS: // fall through |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1670 | case Token::MINUSMINUS: { |
| 1671 | Token t = this->nextToken(); |
| 1672 | std::unique_ptr<ASTExpression> expr = this->unaryExpression(); |
| 1673 | if (!expr) { |
| 1674 | return nullptr; |
| 1675 | } |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1676 | return std::unique_ptr<ASTExpression>(new ASTPrefixExpression(std::move(t), |
| 1677 | std::move(expr))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1678 | } |
| 1679 | default: |
| 1680 | return this->postfixExpression(); |
| 1681 | } |
| 1682 | } |
| 1683 | |
| 1684 | /* term suffix* */ |
| 1685 | std::unique_ptr<ASTExpression> Parser::postfixExpression() { |
| 1686 | std::unique_ptr<ASTExpression> result = this->term(); |
| 1687 | if (!result) { |
| 1688 | return nullptr; |
| 1689 | } |
| 1690 | for (;;) { |
| 1691 | switch (this->peek().fKind) { |
| 1692 | case Token::LBRACKET: // fall through |
| 1693 | case Token::DOT: // fall through |
| 1694 | case Token::LPAREN: // fall through |
| 1695 | case Token::PLUSPLUS: // fall through |
| 1696 | case Token::MINUSMINUS: { |
| 1697 | std::unique_ptr<ASTSuffix> s = this->suffix(); |
| 1698 | if (!s) { |
| 1699 | return nullptr; |
| 1700 | } |
| 1701 | result.reset(new ASTSuffixExpression(std::move(result), std::move(s))); |
| 1702 | break; |
| 1703 | } |
| 1704 | default: |
| 1705 | return result; |
| 1706 | } |
| 1707 | } |
| 1708 | } |
| 1709 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1710 | /* LBRACKET expression? RBRACKET | DOT IDENTIFIER | LPAREN parameters RPAREN | |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1711 | PLUSPLUS | MINUSMINUS */ |
| 1712 | std::unique_ptr<ASTSuffix> Parser::suffix() { |
| 1713 | Token next = this->nextToken(); |
| 1714 | switch (next.fKind) { |
| 1715 | case Token::LBRACKET: { |
Ethan Nicholas | 0c9d13b | 2017-05-08 16:18:19 -0400 | [diff] [blame] | 1716 | if (this->checkNext(Token::RBRACKET)) { |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 1717 | return std::unique_ptr<ASTSuffix>(new ASTIndexSuffix(next.fPosition)); |
| 1718 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1719 | std::unique_ptr<ASTExpression> e = this->expression(); |
| 1720 | if (!e) { |
| 1721 | return nullptr; |
| 1722 | } |
| 1723 | this->expect(Token::RBRACKET, "']' to complete array access expression"); |
| 1724 | return std::unique_ptr<ASTSuffix>(new ASTIndexSuffix(std::move(e))); |
| 1725 | } |
| 1726 | case Token::DOT: { |
| 1727 | Position pos = this->peek().fPosition; |
Ethan Nicholas | 0df1b04 | 2017-03-31 13:56:23 -0400 | [diff] [blame] | 1728 | String text; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1729 | if (this->identifier(&text)) { |
| 1730 | return std::unique_ptr<ASTSuffix>(new ASTFieldSuffix(pos, std::move(text))); |
| 1731 | } |
| 1732 | return nullptr; |
| 1733 | } |
| 1734 | case Token::LPAREN: { |
| 1735 | std::vector<std::unique_ptr<ASTExpression>> parameters; |
| 1736 | if (this->peek().fKind != Token::RPAREN) { |
| 1737 | for (;;) { |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 1738 | std::unique_ptr<ASTExpression> expr = this->assignmentExpression(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1739 | if (!expr) { |
| 1740 | return nullptr; |
| 1741 | } |
| 1742 | parameters.push_back(std::move(expr)); |
Ethan Nicholas | 4b330df | 2017-05-17 10:52:55 -0400 | [diff] [blame] | 1743 | if (!this->checkNext(Token::COMMA)) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1744 | break; |
| 1745 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1746 | } |
| 1747 | } |
| 1748 | this->expect(Token::RPAREN, "')' to complete function parameters"); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1749 | return std::unique_ptr<ASTSuffix>(new ASTCallSuffix(next.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1750 | std::move(parameters))); |
| 1751 | } |
| 1752 | case Token::PLUSPLUS: |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1753 | return std::unique_ptr<ASTSuffix>(new ASTSuffix(next.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1754 | ASTSuffix::kPostIncrement_Kind)); |
| 1755 | case Token::MINUSMINUS: |
| 1756 | return std::unique_ptr<ASTSuffix>(new ASTSuffix(next.fPosition, |
| 1757 | ASTSuffix::kPostDecrement_Kind)); |
| 1758 | default: { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1759 | this->error(next.fPosition, "expected expression suffix, but found '" + next.fText + |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1760 | "'\n"); |
| 1761 | return nullptr; |
| 1762 | } |
| 1763 | } |
| 1764 | } |
| 1765 | |
| 1766 | /* IDENTIFIER | intLiteral | floatLiteral | boolLiteral | '(' expression ')' */ |
| 1767 | std::unique_ptr<ASTExpression> Parser::term() { |
| 1768 | std::unique_ptr<ASTExpression> result; |
| 1769 | Token t = this->peek(); |
| 1770 | switch (t.fKind) { |
| 1771 | case Token::IDENTIFIER: { |
Ethan Nicholas | 0df1b04 | 2017-03-31 13:56:23 -0400 | [diff] [blame] | 1772 | String text; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1773 | if (this->identifier(&text)) { |
| 1774 | result.reset(new ASTIdentifier(t.fPosition, std::move(text))); |
| 1775 | } |
| 1776 | break; |
| 1777 | } |
| 1778 | case Token::INT_LITERAL: { |
| 1779 | int64_t i; |
| 1780 | if (this->intLiteral(&i)) { |
| 1781 | result.reset(new ASTIntLiteral(t.fPosition, i)); |
| 1782 | } |
| 1783 | break; |
| 1784 | } |
| 1785 | case Token::FLOAT_LITERAL: { |
| 1786 | double f; |
| 1787 | if (this->floatLiteral(&f)) { |
| 1788 | result.reset(new ASTFloatLiteral(t.fPosition, f)); |
| 1789 | } |
| 1790 | break; |
| 1791 | } |
| 1792 | case Token::TRUE_LITERAL: // fall through |
| 1793 | case Token::FALSE_LITERAL: { |
| 1794 | bool b; |
| 1795 | if (this->boolLiteral(&b)) { |
| 1796 | result.reset(new ASTBoolLiteral(t.fPosition, b)); |
| 1797 | } |
| 1798 | break; |
| 1799 | } |
| 1800 | case Token::LPAREN: { |
| 1801 | this->nextToken(); |
| 1802 | result = this->expression(); |
| 1803 | if (result) { |
| 1804 | this->expect(Token::RPAREN, "')' to complete expression"); |
| 1805 | } |
| 1806 | break; |
| 1807 | } |
| 1808 | default: |
| 1809 | this->nextToken(); |
| 1810 | this->error(t.fPosition, "expected expression, but found '" + t.fText + "'\n"); |
| 1811 | result = nullptr; |
| 1812 | } |
| 1813 | return result; |
| 1814 | } |
| 1815 | |
| 1816 | /* INT_LITERAL */ |
| 1817 | bool Parser::intLiteral(int64_t* dest) { |
| 1818 | Token t; |
| 1819 | if (this->expect(Token::INT_LITERAL, "integer literal", &t)) { |
| 1820 | *dest = SkSL::stol(t.fText); |
| 1821 | return true; |
| 1822 | } |
| 1823 | return false; |
| 1824 | } |
| 1825 | |
| 1826 | /* FLOAT_LITERAL */ |
| 1827 | bool Parser::floatLiteral(double* dest) { |
| 1828 | Token t; |
| 1829 | if (this->expect(Token::FLOAT_LITERAL, "float literal", &t)) { |
| 1830 | *dest = SkSL::stod(t.fText); |
| 1831 | return true; |
| 1832 | } |
| 1833 | return false; |
| 1834 | } |
| 1835 | |
| 1836 | /* TRUE_LITERAL | FALSE_LITERAL */ |
| 1837 | bool Parser::boolLiteral(bool* dest) { |
| 1838 | Token t = this->nextToken(); |
| 1839 | switch (t.fKind) { |
| 1840 | case Token::TRUE_LITERAL: |
| 1841 | *dest = true; |
| 1842 | return true; |
| 1843 | case Token::FALSE_LITERAL: |
| 1844 | *dest = false; |
| 1845 | return true; |
| 1846 | default: |
| 1847 | this->error(t.fPosition, "expected 'true' or 'false', but found '" + t.fText + "'\n"); |
| 1848 | return false; |
| 1849 | } |
| 1850 | } |
| 1851 | |
| 1852 | /* IDENTIFIER */ |
Ethan Nicholas | 0df1b04 | 2017-03-31 13:56:23 -0400 | [diff] [blame] | 1853 | bool Parser::identifier(String* dest) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1854 | Token t; |
| 1855 | if (this->expect(Token::IDENTIFIER, "identifier", &t)) { |
Brian Osman | 634624a | 2017-08-15 11:14:30 -0400 | [diff] [blame^] | 1856 | *dest = std::move(t.fText); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1857 | return true; |
| 1858 | } |
| 1859 | return false; |
| 1860 | } |
| 1861 | |
| 1862 | } // namespace |