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 |
| 13 | #ifdef __clang__ |
| 14 | #pragma clang diagnostic push |
| 15 | #pragma clang diagnostic ignored "-Wunneeded-internal-declaration" |
ethannicholas | 8e5a588 | 2016-07-06 06:55:44 -0700 | [diff] [blame] | 16 | #pragma clang diagnostic ignored "-Wnull-conversion" |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 17 | #pragma clang diagnostic ignored "-Wsign-compare" |
| 18 | #endif |
| 19 | #ifdef __GNUC__ |
| 20 | #pragma GCC diagnostic push |
| 21 | #pragma GCC diagnostic ignored "-Wsign-compare" |
| 22 | #endif |
| 23 | #ifdef _MSC_VER |
| 24 | #pragma warning(push) |
| 25 | #pragma warning(disable:4018) |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 26 | #endif |
| 27 | #include "lex.sksl.c" |
| 28 | #ifdef __clang__ |
| 29 | #pragma clang diagnostic pop |
| 30 | #endif |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 31 | #ifdef __GNUC__ |
| 32 | #pragma GCC diagnostic pop |
| 33 | #endif |
| 34 | #ifdef _MSC_VER |
| 35 | #pragma warning(pop) |
| 36 | #endif |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 37 | #undef register |
| 38 | |
| 39 | #include "ast/SkSLASTBinaryExpression.h" |
| 40 | #include "ast/SkSLASTBlock.h" |
| 41 | #include "ast/SkSLASTBoolLiteral.h" |
| 42 | #include "ast/SkSLASTBreakStatement.h" |
| 43 | #include "ast/SkSLASTCallSuffix.h" |
| 44 | #include "ast/SkSLASTContinueStatement.h" |
| 45 | #include "ast/SkSLASTDiscardStatement.h" |
| 46 | #include "ast/SkSLASTDoStatement.h" |
| 47 | #include "ast/SkSLASTExpression.h" |
| 48 | #include "ast/SkSLASTExpressionStatement.h" |
| 49 | #include "ast/SkSLASTExtension.h" |
| 50 | #include "ast/SkSLASTFieldSuffix.h" |
| 51 | #include "ast/SkSLASTFloatLiteral.h" |
| 52 | #include "ast/SkSLASTForStatement.h" |
| 53 | #include "ast/SkSLASTFunction.h" |
| 54 | #include "ast/SkSLASTIdentifier.h" |
| 55 | #include "ast/SkSLASTIfStatement.h" |
| 56 | #include "ast/SkSLASTIndexSuffix.h" |
| 57 | #include "ast/SkSLASTInterfaceBlock.h" |
| 58 | #include "ast/SkSLASTIntLiteral.h" |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 59 | #include "ast/SkSLASTModifiersDeclaration.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 60 | #include "ast/SkSLASTParameter.h" |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 61 | #include "ast/SkSLASTPrecision.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 62 | #include "ast/SkSLASTPrefixExpression.h" |
| 63 | #include "ast/SkSLASTReturnStatement.h" |
| 64 | #include "ast/SkSLASTStatement.h" |
| 65 | #include "ast/SkSLASTSuffixExpression.h" |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame^] | 66 | #include "ast/SkSLASTSwitchCase.h" |
| 67 | #include "ast/SkSLASTSwitchStatement.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 68 | #include "ast/SkSLASTTernaryExpression.h" |
| 69 | #include "ast/SkSLASTType.h" |
| 70 | #include "ast/SkSLASTVarDeclaration.h" |
| 71 | #include "ast/SkSLASTVarDeclarationStatement.h" |
| 72 | #include "ast/SkSLASTWhileStatement.h" |
| 73 | #include "ir/SkSLSymbolTable.h" |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 74 | #include "ir/SkSLModifiers.h" |
ethannicholas | d598f79 | 2016-07-25 10:08:54 -0700 | [diff] [blame] | 75 | #include "ir/SkSLType.h" |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 76 | |
| 77 | namespace SkSL { |
| 78 | |
ethannicholas | cad6416 | 2016-10-27 10:54:02 -0700 | [diff] [blame] | 79 | #define MAX_PARSE_DEPTH 50 |
| 80 | |
| 81 | class AutoDepth { |
| 82 | public: |
| 83 | AutoDepth(Parser* p) |
| 84 | : fParser(p) { |
| 85 | fParser->fDepth++; |
| 86 | } |
| 87 | |
| 88 | ~AutoDepth() { |
| 89 | fParser->fDepth--; |
| 90 | } |
| 91 | |
| 92 | bool checkValid() { |
| 93 | if (fParser->fDepth > MAX_PARSE_DEPTH) { |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 94 | fParser->error(fParser->peek().fPosition, SkString("exceeded max parse depth")); |
ethannicholas | cad6416 | 2016-10-27 10:54:02 -0700 | [diff] [blame] | 95 | return false; |
| 96 | } |
| 97 | return true; |
| 98 | } |
| 99 | |
| 100 | private: |
| 101 | Parser* fParser; |
| 102 | }; |
| 103 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 104 | Parser::Parser(SkString text, SymbolTable& types, ErrorReporter& errors) |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 105 | : fPushback(Position(-1, -1), Token::INVALID_TOKEN, SkString()) |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 106 | , fTypes(types) |
| 107 | , fErrors(errors) { |
| 108 | sksllex_init(&fScanner); |
| 109 | fBuffer = sksl_scan_string(text.c_str(), fScanner); |
| 110 | skslset_lineno(1, fScanner); |
| 111 | |
| 112 | if (false) { |
| 113 | // avoid unused warning |
| 114 | yyunput(0, nullptr, fScanner); |
| 115 | } |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 116 | |
| 117 | fLayoutKeys[SkString("location")] = kLocation_LayoutKey; |
| 118 | fLayoutKeys[SkString("offset")] = kOffset_LayoutKey; |
| 119 | fLayoutKeys[SkString("binding")] = kBinding_LayoutKey; |
| 120 | fLayoutKeys[SkString("index")] = kIndex_LayoutKey; |
| 121 | fLayoutKeys[SkString("set")] = kSet_LayoutKey; |
| 122 | fLayoutKeys[SkString("builtin")] = kBuiltin_LayoutKey; |
| 123 | fLayoutKeys[SkString("input_attachment_index")] = kInputAttachmentIndex_LayoutKey; |
| 124 | fLayoutKeys[SkString("origin_upper_left")] = kOriginUpperLeft_LayoutKey; |
| 125 | fLayoutKeys[SkString("override_coverage")] = kOverrideCoverage_LayoutKey; |
| 126 | fLayoutKeys[SkString("blend_support_all_equations")] = kBlendSupportAllEquations_LayoutKey; |
| 127 | fLayoutKeys[SkString("push_constant")] = kPushConstant_LayoutKey; |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 128 | fLayoutKeys[SkString("points")] = kPoints_LayoutKey; |
| 129 | fLayoutKeys[SkString("lines")] = kLines_LayoutKey; |
| 130 | fLayoutKeys[SkString("line_strip")] = kLineStrip_LayoutKey; |
| 131 | fLayoutKeys[SkString("lines_adjacency")] = kLinesAdjacency_LayoutKey; |
| 132 | fLayoutKeys[SkString("triangles")] = kTriangles_LayoutKey; |
| 133 | fLayoutKeys[SkString("triangle_strip")] = kTriangleStrip_LayoutKey; |
| 134 | fLayoutKeys[SkString("triangles_adjacency")] = kTrianglesAdjacency_LayoutKey; |
| 135 | fLayoutKeys[SkString("max_vertices")] = kMaxVertices_LayoutKey; |
| 136 | fLayoutKeys[SkString("invocations")] = kInvocations_LayoutKey; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | Parser::~Parser() { |
| 140 | sksl_delete_buffer(fBuffer, fScanner); |
ethannicholas | 69a7e7c | 2016-07-01 19:09:27 -0700 | [diff] [blame] | 141 | sksllex_destroy(fScanner); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 142 | } |
| 143 | |
| 144 | /* (precision | directive | declaration)* END_OF_FILE */ |
| 145 | std::vector<std::unique_ptr<ASTDeclaration>> Parser::file() { |
| 146 | std::vector<std::unique_ptr<ASTDeclaration>> result; |
| 147 | for (;;) { |
| 148 | switch (this->peek().fKind) { |
| 149 | case Token::END_OF_FILE: |
| 150 | return result; |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 151 | case Token::PRECISION: { |
| 152 | std::unique_ptr<ASTDeclaration> precision = this->precision(); |
| 153 | if (precision) { |
| 154 | result.push_back(std::move(precision)); |
| 155 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 156 | break; |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 157 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 158 | case Token::DIRECTIVE: { |
| 159 | std::unique_ptr<ASTDeclaration> decl = this->directive(); |
| 160 | if (decl) { |
| 161 | result.push_back(std::move(decl)); |
| 162 | } |
| 163 | break; |
| 164 | } |
| 165 | default: { |
| 166 | std::unique_ptr<ASTDeclaration> decl = this->declaration(); |
| 167 | if (!decl) { |
| 168 | continue; |
| 169 | } |
| 170 | result.push_back(std::move(decl)); |
| 171 | } |
| 172 | } |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | Token Parser::nextToken() { |
| 177 | if (fPushback.fKind != Token::INVALID_TOKEN) { |
| 178 | Token result = fPushback; |
| 179 | fPushback.fKind = Token::INVALID_TOKEN; |
| 180 | fPushback.fText = ""; |
| 181 | return result; |
| 182 | } |
| 183 | int token = sksllex(fScanner); |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 184 | SkString text; |
ethannicholas | 471e894 | 2016-10-28 09:02:46 -0700 | [diff] [blame] | 185 | switch ((Token::Kind) token) { |
| 186 | case Token::IDENTIFIER: // fall through |
| 187 | case Token::INT_LITERAL: // fall through |
| 188 | case Token::FLOAT_LITERAL: // fall through |
| 189 | case Token::DIRECTIVE: |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 190 | text = SkString(skslget_text(fScanner)); |
ethannicholas | 471e894 | 2016-10-28 09:02:46 -0700 | [diff] [blame] | 191 | break; |
| 192 | default: |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 193 | #ifdef SK_DEBUG |
| 194 | text = SkString(skslget_text(fScanner)); |
| 195 | #endif |
ethannicholas | 471e894 | 2016-10-28 09:02:46 -0700 | [diff] [blame] | 196 | break; |
| 197 | } |
| 198 | return Token(Position(skslget_lineno(fScanner), -1), (Token::Kind) token, text); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | void Parser::pushback(Token t) { |
| 202 | ASSERT(fPushback.fKind == Token::INVALID_TOKEN); |
| 203 | fPushback = t; |
| 204 | } |
| 205 | |
| 206 | Token Parser::peek() { |
| 207 | fPushback = this->nextToken(); |
| 208 | return fPushback; |
| 209 | } |
| 210 | |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 211 | |
| 212 | bool Parser::expect(Token::Kind kind, const char* expected, Token* result) { |
| 213 | return this->expect(kind, SkString(expected), result); |
| 214 | } |
| 215 | |
| 216 | bool Parser::expect(Token::Kind kind, SkString expected, Token* result) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 217 | Token next = this->nextToken(); |
| 218 | if (next.fKind == kind) { |
| 219 | if (result) { |
| 220 | *result = next; |
| 221 | } |
| 222 | return true; |
| 223 | } else { |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 224 | if (next.fText.size()) { |
| 225 | this->error(next.fPosition, "expected " + expected + ", but found '" + next.fText + |
| 226 | "'"); |
| 227 | } else { |
| 228 | this->error(next.fPosition, "parse error, recompile in debug mode for details"); |
| 229 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 230 | return false; |
| 231 | } |
| 232 | } |
| 233 | |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 234 | void Parser::error(Position p, const char* msg) { |
| 235 | this->error(p, SkString(msg)); |
| 236 | } |
| 237 | |
| 238 | void Parser::error(Position p, SkString msg) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 239 | fErrors.error(p, msg); |
| 240 | } |
| 241 | |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 242 | bool Parser::isType(SkString name) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 243 | return nullptr != fTypes[name]; |
| 244 | } |
| 245 | |
| 246 | /* PRECISION (LOWP | MEDIUMP | HIGHP) type SEMICOLON */ |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 247 | std::unique_ptr<ASTDeclaration> Parser::precision() { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 248 | if (!this->expect(Token::PRECISION, "'precision'")) { |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 249 | return nullptr; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 250 | } |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 251 | Modifiers::Flag result; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 252 | Token p = this->nextToken(); |
| 253 | switch (p.fKind) { |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 254 | case Token::LOWP: |
| 255 | result = Modifiers::kLowp_Flag; |
| 256 | break; |
| 257 | case Token::MEDIUMP: |
| 258 | result = Modifiers::kMediump_Flag; |
| 259 | break; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 260 | case Token::HIGHP: |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 261 | result = Modifiers::kHighp_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 262 | break; |
| 263 | default: |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 264 | this->error(p.fPosition, "expected 'lowp', 'mediump', or 'highp', but found '" + |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 265 | p.fText + "'"); |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 266 | return nullptr; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 267 | } |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 268 | // FIXME handle the type |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 269 | if (!this->type()) { |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 270 | return nullptr; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 271 | } |
| 272 | this->expect(Token::SEMICOLON, "';'"); |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 273 | return std::unique_ptr<ASTDeclaration>(new ASTPrecision(p.fPosition, result)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 274 | } |
| 275 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 276 | /* DIRECTIVE(#version) INT_LITERAL ("es" | "compatibility")? | |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 277 | DIRECTIVE(#extension) IDENTIFIER COLON IDENTIFIER */ |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 278 | std::unique_ptr<ASTDeclaration> Parser::directive() { |
| 279 | Token start; |
| 280 | if (!this->expect(Token::DIRECTIVE, "a directive", &start)) { |
| 281 | return nullptr; |
| 282 | } |
| 283 | if (start.fText == "#version") { |
| 284 | this->expect(Token::INT_LITERAL, "a version number"); |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 285 | Token next = this->peek(); |
| 286 | if (next.fText == "es" || next.fText == "compatibility") { |
| 287 | this->nextToken(); |
| 288 | } |
| 289 | // version is ignored for now; it will eventually become an error when we stop pretending |
| 290 | // to be GLSL |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 291 | return nullptr; |
| 292 | } else if (start.fText == "#extension") { |
| 293 | Token name; |
| 294 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 295 | return nullptr; |
| 296 | } |
| 297 | if (!this->expect(Token::COLON, "':'")) { |
| 298 | return nullptr; |
| 299 | } |
| 300 | // FIXME: need to start paying attention to this token |
| 301 | if (!this->expect(Token::IDENTIFIER, "an identifier")) { |
| 302 | return nullptr; |
| 303 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 304 | return std::unique_ptr<ASTDeclaration>(new ASTExtension(start.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 305 | std::move(name.fText))); |
| 306 | } else { |
| 307 | this->error(start.fPosition, "unsupported directive '" + start.fText + "'"); |
| 308 | return nullptr; |
| 309 | } |
| 310 | } |
| 311 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 312 | /* modifiers (structVarDeclaration | type IDENTIFIER ((LPAREN parameter |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 313 | (COMMA parameter)* RPAREN (block | SEMICOLON)) | SEMICOLON) | interfaceBlock) */ |
| 314 | std::unique_ptr<ASTDeclaration> Parser::declaration() { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 315 | Modifiers modifiers = this->modifiers(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 316 | Token lookahead = this->peek(); |
| 317 | if (lookahead.fKind == Token::IDENTIFIER && !this->isType(lookahead.fText)) { |
| 318 | // we have an identifier that's not a type, could be the start of an interface block |
| 319 | return this->interfaceBlock(modifiers); |
| 320 | } |
| 321 | if (lookahead.fKind == Token::STRUCT) { |
| 322 | return this->structVarDeclaration(modifiers); |
| 323 | } |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 324 | if (lookahead.fKind == Token::SEMICOLON) { |
| 325 | this->nextToken(); |
| 326 | return std::unique_ptr<ASTDeclaration>(new ASTModifiersDeclaration(modifiers)); |
| 327 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 328 | std::unique_ptr<ASTType> type(this->type()); |
| 329 | if (!type) { |
| 330 | return nullptr; |
| 331 | } |
| 332 | if (type->fKind == ASTType::kStruct_Kind && peek().fKind == Token::SEMICOLON) { |
| 333 | this->nextToken(); |
| 334 | return nullptr; |
| 335 | } |
| 336 | Token name; |
| 337 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 338 | return nullptr; |
| 339 | } |
| 340 | if (!modifiers.fFlags && this->peek().fKind == Token::LPAREN) { |
| 341 | this->nextToken(); |
| 342 | std::vector<std::unique_ptr<ASTParameter>> parameters; |
| 343 | while (this->peek().fKind != Token::RPAREN) { |
| 344 | if (parameters.size() > 0) { |
| 345 | if (!this->expect(Token::COMMA, "','")) { |
| 346 | return nullptr; |
| 347 | } |
| 348 | } |
| 349 | std::unique_ptr<ASTParameter> parameter = this->parameter(); |
| 350 | if (!parameter) { |
| 351 | return nullptr; |
| 352 | } |
| 353 | parameters.push_back(std::move(parameter)); |
| 354 | } |
| 355 | this->nextToken(); |
| 356 | std::unique_ptr<ASTBlock> body; |
| 357 | if (this->peek().fKind == Token::SEMICOLON) { |
| 358 | this->nextToken(); |
| 359 | } else { |
| 360 | body = this->block(); |
| 361 | if (!body) { |
| 362 | return nullptr; |
| 363 | } |
| 364 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 365 | return std::unique_ptr<ASTDeclaration>(new ASTFunction(name.fPosition, std::move(type), |
| 366 | std::move(name.fText), |
| 367 | std::move(parameters), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 368 | std::move(body))); |
| 369 | } else { |
| 370 | return this->varDeclarationEnd(modifiers, std::move(type), name.fText); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | /* modifiers type IDENTIFIER varDeclarationEnd */ |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 375 | std::unique_ptr<ASTVarDeclarations> Parser::varDeclarations() { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 376 | Modifiers modifiers = this->modifiers(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 377 | std::unique_ptr<ASTType> type(this->type()); |
| 378 | if (!type) { |
| 379 | return nullptr; |
| 380 | } |
| 381 | Token name; |
| 382 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 383 | return nullptr; |
| 384 | } |
| 385 | return this->varDeclarationEnd(modifiers, std::move(type), std::move(name.fText)); |
| 386 | } |
| 387 | |
| 388 | /* STRUCT IDENTIFIER LBRACE varDeclaration* RBRACE */ |
| 389 | std::unique_ptr<ASTType> Parser::structDeclaration() { |
| 390 | if (!this->expect(Token::STRUCT, "'struct'")) { |
| 391 | return nullptr; |
| 392 | } |
| 393 | Token name; |
| 394 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 395 | return nullptr; |
| 396 | } |
| 397 | if (!this->expect(Token::LBRACE, "'{'")) { |
| 398 | return nullptr; |
| 399 | } |
| 400 | std::vector<Type::Field> fields; |
| 401 | while (this->peek().fKind != Token::RBRACE) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 402 | std::unique_ptr<ASTVarDeclarations> decl = this->varDeclarations(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 403 | if (!decl) { |
| 404 | return nullptr; |
| 405 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 406 | for (const auto& var : decl->fVars) { |
ethannicholas | d598f79 | 2016-07-25 10:08:54 -0700 | [diff] [blame] | 407 | auto type = (const Type*) fTypes[decl->fType->fName]; |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 408 | for (int i = (int) var.fSizes.size() - 1; i >= 0; i--) { |
ethannicholas | dd4645b | 2016-10-14 12:14:46 -0700 | [diff] [blame] | 409 | if (!var.fSizes[i] || var.fSizes[i]->fKind != ASTExpression::kInt_Kind) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 410 | this->error(decl->fPosition, "array size in struct field must be a constant"); |
ethannicholas | dd4645b | 2016-10-14 12:14:46 -0700 | [diff] [blame] | 411 | return nullptr; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 412 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 413 | uint64_t columns = ((ASTIntLiteral&) *var.fSizes[i]).fValue; |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 414 | SkString name = type->name() + "[" + to_string(columns) + "]"; |
ethannicholas | d598f79 | 2016-07-25 10:08:54 -0700 | [diff] [blame] | 415 | type = new Type(name, Type::kArray_Kind, *type, (int) columns); |
| 416 | fTypes.takeOwnership((Type*) type); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 417 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 418 | fields.push_back(Type::Field(decl->fModifiers, var.fName, type)); |
| 419 | if (var.fValue) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 420 | this->error(decl->fPosition, "initializers are not permitted on struct fields"); |
| 421 | } |
| 422 | } |
| 423 | } |
| 424 | if (!this->expect(Token::RBRACE, "'}'")) { |
| 425 | return nullptr; |
| 426 | } |
Ethan Nicholas | 1967177 | 2016-11-28 16:30:17 -0500 | [diff] [blame] | 427 | 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] | 428 | return std::unique_ptr<ASTType>(new ASTType(name.fPosition, name.fText, |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 429 | ASTType::kStruct_Kind, std::vector<int>())); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | /* structDeclaration ((IDENTIFIER varDeclarationEnd) | SEMICOLON) */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 433 | std::unique_ptr<ASTVarDeclarations> Parser::structVarDeclaration(Modifiers modifiers) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 434 | std::unique_ptr<ASTType> type = this->structDeclaration(); |
| 435 | if (!type) { |
| 436 | return nullptr; |
| 437 | } |
| 438 | if (peek().fKind == Token::IDENTIFIER) { |
| 439 | Token name = this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 440 | std::unique_ptr<ASTVarDeclarations> result = this->varDeclarationEnd(modifiers, |
| 441 | std::move(type), |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 442 | std::move(name.fText)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 443 | if (result) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 444 | for (const auto& var : result->fVars) { |
| 445 | if (var.fValue) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 446 | this->error(var.fValue->fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 447 | "struct variables cannot be initialized"); |
| 448 | } |
| 449 | } |
| 450 | } |
| 451 | return result; |
| 452 | } |
| 453 | this->expect(Token::SEMICOLON, "';'"); |
| 454 | return nullptr; |
| 455 | } |
| 456 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 457 | /* (LBRACKET expression? RBRACKET)* (EQ expression)? (COMMA IDENTIFER |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 458 | (LBRACKET expression? RBRACKET)* (EQ expression)?)* SEMICOLON */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 459 | std::unique_ptr<ASTVarDeclarations> Parser::varDeclarationEnd(Modifiers mods, |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 460 | std::unique_ptr<ASTType> type, |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 461 | SkString name) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 462 | std::vector<ASTVarDeclaration> vars; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 463 | std::vector<std::unique_ptr<ASTExpression>> currentVarSizes; |
| 464 | while (this->peek().fKind == Token::LBRACKET) { |
| 465 | this->nextToken(); |
| 466 | if (this->peek().fKind == Token::RBRACKET) { |
| 467 | this->nextToken(); |
| 468 | currentVarSizes.push_back(nullptr); |
| 469 | } else { |
| 470 | std::unique_ptr<ASTExpression> size(this->expression()); |
| 471 | if (!size) { |
| 472 | return nullptr; |
| 473 | } |
| 474 | currentVarSizes.push_back(std::move(size)); |
| 475 | if (!this->expect(Token::RBRACKET, "']'")) { |
| 476 | return nullptr; |
| 477 | } |
| 478 | } |
| 479 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 480 | std::unique_ptr<ASTExpression> value; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 481 | if (this->peek().fKind == Token::EQ) { |
| 482 | this->nextToken(); |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 483 | value = this->expression(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 484 | if (!value) { |
| 485 | return nullptr; |
| 486 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 487 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 488 | vars.emplace_back(std::move(name), std::move(currentVarSizes), std::move(value)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 489 | while (this->peek().fKind == Token::COMMA) { |
| 490 | this->nextToken(); |
| 491 | Token name; |
| 492 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 493 | return nullptr; |
| 494 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 495 | currentVarSizes.clear(); |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 496 | value.reset(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 497 | while (this->peek().fKind == Token::LBRACKET) { |
| 498 | this->nextToken(); |
| 499 | if (this->peek().fKind == Token::RBRACKET) { |
| 500 | this->nextToken(); |
| 501 | currentVarSizes.push_back(nullptr); |
| 502 | } else { |
| 503 | std::unique_ptr<ASTExpression> size(this->expression()); |
| 504 | if (!size) { |
| 505 | return nullptr; |
| 506 | } |
| 507 | currentVarSizes.push_back(std::move(size)); |
| 508 | if (!this->expect(Token::RBRACKET, "']'")) { |
| 509 | return nullptr; |
| 510 | } |
| 511 | } |
| 512 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 513 | if (this->peek().fKind == Token::EQ) { |
| 514 | this->nextToken(); |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 515 | value = this->expression(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 516 | if (!value) { |
| 517 | return nullptr; |
| 518 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 519 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 520 | vars.emplace_back(std::move(name.fText), std::move(currentVarSizes), std::move(value)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 521 | } |
| 522 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 523 | return nullptr; |
| 524 | } |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 525 | return std::unique_ptr<ASTVarDeclarations>(new ASTVarDeclarations(std::move(mods), |
| 526 | std::move(type), |
| 527 | std::move(vars))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | /* modifiers type IDENTIFIER (LBRACKET INT_LITERAL RBRACKET)? */ |
| 531 | std::unique_ptr<ASTParameter> Parser::parameter() { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 532 | Modifiers modifiers = this->modifiersWithDefaults(Modifiers::kIn_Flag); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 533 | std::unique_ptr<ASTType> type = this->type(); |
| 534 | if (!type) { |
| 535 | return nullptr; |
| 536 | } |
| 537 | Token name; |
| 538 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 539 | return nullptr; |
| 540 | } |
| 541 | std::vector<int> sizes; |
| 542 | while (this->peek().fKind == Token::LBRACKET) { |
| 543 | this->nextToken(); |
| 544 | Token sizeToken; |
| 545 | if (!this->expect(Token::INT_LITERAL, "a positive integer", &sizeToken)) { |
| 546 | return nullptr; |
| 547 | } |
| 548 | sizes.push_back(SkSL::stoi(sizeToken.fText)); |
| 549 | if (!this->expect(Token::RBRACKET, "']'")) { |
| 550 | return nullptr; |
| 551 | } |
| 552 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 553 | return std::unique_ptr<ASTParameter>(new ASTParameter(name.fPosition, modifiers, |
| 554 | std::move(type), name.fText, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 555 | std::move(sizes))); |
| 556 | } |
| 557 | |
| 558 | /** (EQ INT_LITERAL)? */ |
| 559 | int Parser::layoutInt() { |
| 560 | if (!this->expect(Token::EQ, "'='")) { |
| 561 | return -1; |
| 562 | } |
| 563 | Token resultToken; |
| 564 | if (this->expect(Token::INT_LITERAL, "a non-negative integer", &resultToken)) { |
| 565 | return SkSL::stoi(resultToken.fText); |
| 566 | } |
| 567 | return -1; |
| 568 | } |
| 569 | |
ethannicholas | 8ac838d | 2016-11-22 08:39:36 -0800 | [diff] [blame] | 570 | /* LAYOUT LPAREN IDENTIFIER (EQ INT_LITERAL)? (COMMA IDENTIFIER (EQ INT_LITERAL)?)* RPAREN */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 571 | Layout Parser::layout() { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 572 | int location = -1; |
Ethan Nicholas | 1967177 | 2016-11-28 16:30:17 -0500 | [diff] [blame] | 573 | int offset = -1; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 574 | int binding = -1; |
| 575 | int index = -1; |
| 576 | int set = -1; |
| 577 | int builtin = -1; |
Greg Daniel | 64773e6 | 2016-11-22 09:44:03 -0500 | [diff] [blame] | 578 | int inputAttachmentIndex = -1; |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 579 | bool originUpperLeft = false; |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 580 | bool overrideCoverage = false; |
| 581 | bool blendSupportAllEquations = false; |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 582 | Layout::Format format = Layout::Format::kUnspecified; |
ethannicholas | 8ac838d | 2016-11-22 08:39:36 -0800 | [diff] [blame] | 583 | bool pushConstant = false; |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 584 | Layout::Primitive primitive = Layout::kUnspecified_Primitive; |
| 585 | int maxVertices = -1; |
| 586 | int invocations = -1; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 587 | if (this->peek().fKind == Token::LAYOUT) { |
| 588 | this->nextToken(); |
| 589 | if (!this->expect(Token::LPAREN, "'('")) { |
Ethan Nicholas | 1967177 | 2016-11-28 16:30:17 -0500 | [diff] [blame] | 590 | return Layout(location, offset, binding, index, set, builtin, inputAttachmentIndex, |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 591 | originUpperLeft, overrideCoverage, blendSupportAllEquations, format, |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 592 | pushConstant, primitive, maxVertices, invocations); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 593 | } |
| 594 | for (;;) { |
| 595 | Token t = this->nextToken(); |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 596 | auto found = fLayoutKeys.find(t.fText); |
| 597 | if (found != fLayoutKeys.end()) { |
| 598 | switch (found->second) { |
| 599 | case kLocation_LayoutKey: |
| 600 | location = this->layoutInt(); |
| 601 | break; |
| 602 | case kOffset_LayoutKey: |
| 603 | offset = this->layoutInt(); |
| 604 | break; |
| 605 | case kBinding_LayoutKey: |
| 606 | binding = this->layoutInt(); |
| 607 | break; |
| 608 | case kIndex_LayoutKey: |
| 609 | index = this->layoutInt(); |
| 610 | break; |
| 611 | case kSet_LayoutKey: |
| 612 | set = this->layoutInt(); |
| 613 | break; |
| 614 | case kBuiltin_LayoutKey: |
| 615 | builtin = this->layoutInt(); |
| 616 | break; |
| 617 | case kInputAttachmentIndex_LayoutKey: |
| 618 | inputAttachmentIndex = this->layoutInt(); |
| 619 | break; |
| 620 | case kOriginUpperLeft_LayoutKey: |
| 621 | originUpperLeft = true; |
| 622 | break; |
| 623 | case kOverrideCoverage_LayoutKey: |
| 624 | overrideCoverage = true; |
| 625 | break; |
| 626 | case kBlendSupportAllEquations_LayoutKey: |
| 627 | blendSupportAllEquations = true; |
| 628 | break; |
| 629 | case kPushConstant_LayoutKey: |
| 630 | pushConstant = true; |
| 631 | break; |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 632 | case kPoints_LayoutKey: |
| 633 | primitive = Layout::kPoints_Primitive; |
| 634 | break; |
| 635 | case kLines_LayoutKey: |
| 636 | primitive = Layout::kLines_Primitive; |
| 637 | break; |
| 638 | case kLineStrip_LayoutKey: |
| 639 | primitive = Layout::kLineStrip_Primitive; |
| 640 | break; |
| 641 | case kLinesAdjacency_LayoutKey: |
| 642 | primitive = Layout::kLinesAdjacency_Primitive; |
| 643 | break; |
| 644 | case kTriangles_LayoutKey: |
| 645 | primitive = Layout::kTriangles_Primitive; |
| 646 | break; |
| 647 | case kTriangleStrip_LayoutKey: |
| 648 | primitive = Layout::kTriangleStrip_Primitive; |
| 649 | break; |
| 650 | case kTrianglesAdjacency_LayoutKey: |
| 651 | primitive = Layout::kTrianglesAdjacency_Primitive; |
| 652 | break; |
| 653 | case kMaxVertices_LayoutKey: |
| 654 | maxVertices = this->layoutInt(); |
| 655 | break; |
| 656 | case kInvocations_LayoutKey: |
| 657 | invocations = this->layoutInt(); |
| 658 | break; |
Ethan Nicholas | 3614d9a | 2017-02-15 12:33:30 -0500 | [diff] [blame] | 659 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 660 | } else if (Layout::ReadFormat(t.fText, &format)) { |
Brian Salomon | 2a51de8 | 2016-11-16 12:06:01 -0500 | [diff] [blame] | 661 | // AST::ReadFormat stored the result in 'format'. |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 662 | } else { |
Greg Daniel | 64773e6 | 2016-11-22 09:44:03 -0500 | [diff] [blame] | 663 | this->error(t.fPosition, ("'" + t.fText + |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 664 | "' is not a valid layout qualifier").c_str()); |
| 665 | } |
| 666 | if (this->peek().fKind == Token::RPAREN) { |
| 667 | this->nextToken(); |
| 668 | break; |
| 669 | } |
| 670 | if (!this->expect(Token::COMMA, "','")) { |
| 671 | break; |
| 672 | } |
| 673 | } |
| 674 | } |
Ethan Nicholas | 1967177 | 2016-11-28 16:30:17 -0500 | [diff] [blame] | 675 | return Layout(location, offset, binding, index, set, builtin, inputAttachmentIndex, |
| 676 | originUpperLeft, overrideCoverage, blendSupportAllEquations, format, |
Ethan Nicholas | 52cad15 | 2017-02-16 16:37:32 -0500 | [diff] [blame] | 677 | pushConstant, primitive, maxVertices, invocations); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 678 | } |
| 679 | |
Brian Salomon | f9f4512 | 2016-11-29 11:59:17 -0500 | [diff] [blame] | 680 | /* layout? (UNIFORM | CONST | IN | OUT | INOUT | LOWP | MEDIUMP | HIGHP | FLAT | NOPERSPECTIVE | |
| 681 | READONLY | WRITEONLY | COHERENT | VOLATILE | RESTRICT)* */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 682 | Modifiers Parser::modifiers() { |
| 683 | Layout layout = this->layout(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 684 | int flags = 0; |
| 685 | for (;;) { |
| 686 | // TODO: handle duplicate / incompatible flags |
| 687 | switch (peek().fKind) { |
| 688 | case Token::UNIFORM: |
| 689 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 690 | flags |= Modifiers::kUniform_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 691 | break; |
| 692 | case Token::CONST: |
| 693 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 694 | flags |= Modifiers::kConst_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 695 | break; |
| 696 | case Token::IN: |
| 697 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 698 | flags |= Modifiers::kIn_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 699 | break; |
| 700 | case Token::OUT: |
| 701 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 702 | flags |= Modifiers::kOut_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 703 | break; |
| 704 | case Token::INOUT: |
| 705 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 706 | flags |= Modifiers::kIn_Flag; |
| 707 | flags |= Modifiers::kOut_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 708 | break; |
| 709 | case Token::LOWP: |
| 710 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 711 | flags |= Modifiers::kLowp_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 712 | break; |
| 713 | case Token::MEDIUMP: |
| 714 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 715 | flags |= Modifiers::kMediump_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 716 | break; |
| 717 | case Token::HIGHP: |
| 718 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 719 | flags |= Modifiers::kHighp_Flag; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 720 | break; |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 721 | case Token::FLAT: |
| 722 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 723 | flags |= Modifiers::kFlat_Flag; |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 724 | break; |
| 725 | case Token::NOPERSPECTIVE: |
| 726 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 727 | flags |= Modifiers::kNoPerspective_Flag; |
ethannicholas | f789b38 | 2016-08-03 12:43:36 -0700 | [diff] [blame] | 728 | break; |
Brian Salomon | f9f4512 | 2016-11-29 11:59:17 -0500 | [diff] [blame] | 729 | case Token::READONLY: |
| 730 | this->nextToken(); |
| 731 | flags |= Modifiers::kReadOnly_Flag; |
| 732 | break; |
| 733 | case Token::WRITEONLY: |
| 734 | this->nextToken(); |
| 735 | flags |= Modifiers::kWriteOnly_Flag; |
| 736 | break; |
| 737 | case Token::COHERENT: |
| 738 | this->nextToken(); |
| 739 | flags |= Modifiers::kCoherent_Flag; |
| 740 | break; |
| 741 | case Token::VOLATILE: |
| 742 | this->nextToken(); |
| 743 | flags |= Modifiers::kVolatile_Flag; |
| 744 | break; |
| 745 | case Token::RESTRICT: |
| 746 | this->nextToken(); |
| 747 | flags |= Modifiers::kRestrict_Flag; |
| 748 | break; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 749 | default: |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 750 | return Modifiers(layout, flags); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 751 | } |
| 752 | } |
| 753 | } |
| 754 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 755 | Modifiers Parser::modifiersWithDefaults(int defaultFlags) { |
| 756 | Modifiers result = this->modifiers(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 757 | if (!result.fFlags) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 758 | return Modifiers(result.fLayout, defaultFlags); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 759 | } |
| 760 | return result; |
| 761 | } |
| 762 | |
| 763 | /* ifStatement | forStatement | doStatement | whileStatement | block | expression */ |
| 764 | std::unique_ptr<ASTStatement> Parser::statement() { |
| 765 | Token start = this->peek(); |
| 766 | switch (start.fKind) { |
| 767 | case Token::IF: |
| 768 | return this->ifStatement(); |
| 769 | case Token::FOR: |
| 770 | return this->forStatement(); |
| 771 | case Token::DO: |
| 772 | return this->doStatement(); |
| 773 | case Token::WHILE: |
| 774 | return this->whileStatement(); |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame^] | 775 | case Token::SWITCH: |
| 776 | return this->switchStatement(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 777 | case Token::RETURN: |
| 778 | return this->returnStatement(); |
| 779 | case Token::BREAK: |
| 780 | return this->breakStatement(); |
| 781 | case Token::CONTINUE: |
| 782 | return this->continueStatement(); |
| 783 | case Token::DISCARD: |
| 784 | return this->discardStatement(); |
| 785 | case Token::LBRACE: |
| 786 | return this->block(); |
| 787 | case Token::SEMICOLON: |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 788 | this->nextToken(); |
| 789 | return std::unique_ptr<ASTStatement>(new ASTBlock(start.fPosition, |
ethannicholas | 0730be7 | 2016-09-01 07:59:02 -0700 | [diff] [blame] | 790 | std::vector<std::unique_ptr<ASTStatement>>())); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 791 | case Token::CONST: // fall through |
| 792 | case Token::HIGHP: // fall through |
| 793 | case Token::MEDIUMP: // fall through |
| 794 | case Token::LOWP: { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 795 | auto decl = this->varDeclarations(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 796 | if (!decl) { |
| 797 | return nullptr; |
| 798 | } |
| 799 | return std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement(std::move(decl))); |
| 800 | } |
| 801 | case Token::IDENTIFIER: |
| 802 | if (this->isType(start.fText)) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 803 | auto decl = this->varDeclarations(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 804 | if (!decl) { |
| 805 | return nullptr; |
| 806 | } |
| 807 | return std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement( |
| 808 | std::move(decl))); |
| 809 | } |
| 810 | // fall through |
| 811 | default: |
| 812 | return this->expressionStatement(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 813 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 814 | } |
| 815 | |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 816 | /* IDENTIFIER(type) (LBRACKET intLiteral? RBRACKET)* */ |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 817 | std::unique_ptr<ASTType> Parser::type() { |
| 818 | Token type; |
| 819 | if (!this->expect(Token::IDENTIFIER, "a type", &type)) { |
| 820 | return nullptr; |
| 821 | } |
| 822 | if (!this->isType(type.fText)) { |
| 823 | this->error(type.fPosition, ("no type named '" + type.fText + "'").c_str()); |
| 824 | return nullptr; |
| 825 | } |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 826 | std::vector<int> sizes; |
| 827 | while (this->peek().fKind == Token::LBRACKET) { |
| 828 | this->expect(Token::LBRACKET, "'['"); |
| 829 | if (this->peek().fKind != Token::RBRACKET) { |
| 830 | int64_t i; |
| 831 | if (this->intLiteral(&i)) { |
| 832 | sizes.push_back(i); |
| 833 | } else { |
| 834 | return nullptr; |
| 835 | } |
| 836 | } else { |
| 837 | sizes.push_back(-1); |
| 838 | } |
| 839 | this->expect(Token::RBRACKET, "']'"); |
| 840 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 841 | 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] | 842 | ASTType::kIdentifier_Kind, sizes)); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 843 | } |
| 844 | |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 845 | /* IDENTIFIER LBRACE varDeclaration* RBRACE (IDENTIFIER (LBRACKET expression? RBRACKET)*)? */ |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 846 | std::unique_ptr<ASTDeclaration> Parser::interfaceBlock(Modifiers mods) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 847 | Token name; |
| 848 | if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { |
| 849 | return nullptr; |
| 850 | } |
| 851 | if (peek().fKind != Token::LBRACE) { |
| 852 | // 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] | 853 | // 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] | 854 | // it's better to report it as an unknown type |
| 855 | this->error(name.fPosition, "no type named '" + name.fText + "'"); |
| 856 | return nullptr; |
| 857 | } |
| 858 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 859 | std::vector<std::unique_ptr<ASTVarDeclarations>> decls; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 860 | while (this->peek().fKind != Token::RBRACE) { |
ethannicholas | 14fe8cc | 2016-09-07 13:37:16 -0700 | [diff] [blame] | 861 | std::unique_ptr<ASTVarDeclarations> decl = this->varDeclarations(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 862 | if (!decl) { |
| 863 | return nullptr; |
| 864 | } |
| 865 | decls.push_back(std::move(decl)); |
| 866 | } |
| 867 | this->nextToken(); |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 868 | SkString instanceName; |
| 869 | std::vector<std::unique_ptr<ASTExpression>> sizes; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 870 | if (this->peek().fKind == Token::IDENTIFIER) { |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 871 | instanceName = this->nextToken().fText; |
| 872 | while (this->peek().fKind == Token::LBRACKET) { |
| 873 | this->expect(Token::LBRACKET, "'['"); |
| 874 | if (this->peek().fKind != Token::RBRACKET) { |
| 875 | std::unique_ptr<ASTExpression> size = this->expression(); |
| 876 | if (!size) { |
| 877 | return nullptr; |
| 878 | } |
| 879 | sizes.push_back(std::move(size)); |
| 880 | } else { |
| 881 | sizes.push_back(nullptr); |
| 882 | } |
| 883 | this->expect(Token::RBRACKET, "']'"); |
| 884 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 885 | } |
| 886 | this->expect(Token::SEMICOLON, "';'"); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 887 | return std::unique_ptr<ASTDeclaration>(new ASTInterfaceBlock(name.fPosition, mods, |
Ethan Nicholas | 50afc17 | 2017-02-16 14:49:57 -0500 | [diff] [blame] | 888 | name.fText, std::move(decls), |
| 889 | std::move(instanceName), |
| 890 | std::move(sizes))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 891 | } |
| 892 | |
| 893 | /* IF LPAREN expression RPAREN statement (ELSE statement)? */ |
| 894 | std::unique_ptr<ASTIfStatement> Parser::ifStatement() { |
| 895 | Token start; |
| 896 | if (!this->expect(Token::IF, "'if'", &start)) { |
| 897 | return nullptr; |
| 898 | } |
| 899 | if (!this->expect(Token::LPAREN, "'('")) { |
| 900 | return nullptr; |
| 901 | } |
| 902 | std::unique_ptr<ASTExpression> test(this->expression()); |
| 903 | if (!test) { |
| 904 | return nullptr; |
| 905 | } |
| 906 | if (!this->expect(Token::RPAREN, "')'")) { |
| 907 | return nullptr; |
| 908 | } |
| 909 | std::unique_ptr<ASTStatement> ifTrue(this->statement()); |
| 910 | if (!ifTrue) { |
| 911 | return nullptr; |
| 912 | } |
| 913 | std::unique_ptr<ASTStatement> ifFalse; |
| 914 | if (this->peek().fKind == Token::ELSE) { |
| 915 | this->nextToken(); |
| 916 | ifFalse = this->statement(); |
| 917 | if (!ifFalse) { |
| 918 | return nullptr; |
| 919 | } |
| 920 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 921 | return std::unique_ptr<ASTIfStatement>(new ASTIfStatement(start.fPosition, std::move(test), |
| 922 | std::move(ifTrue), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 923 | std::move(ifFalse))); |
| 924 | } |
| 925 | |
| 926 | /* DO statement WHILE LPAREN expression RPAREN SEMICOLON */ |
| 927 | std::unique_ptr<ASTDoStatement> Parser::doStatement() { |
| 928 | Token start; |
| 929 | if (!this->expect(Token::DO, "'do'", &start)) { |
| 930 | return nullptr; |
| 931 | } |
| 932 | std::unique_ptr<ASTStatement> statement(this->statement()); |
| 933 | if (!statement) { |
| 934 | return nullptr; |
| 935 | } |
| 936 | if (!this->expect(Token::WHILE, "'while'")) { |
| 937 | return nullptr; |
| 938 | } |
| 939 | if (!this->expect(Token::LPAREN, "'('")) { |
| 940 | return nullptr; |
| 941 | } |
| 942 | std::unique_ptr<ASTExpression> test(this->expression()); |
| 943 | if (!test) { |
| 944 | return nullptr; |
| 945 | } |
| 946 | if (!this->expect(Token::RPAREN, "')'")) { |
| 947 | return nullptr; |
| 948 | } |
| 949 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 950 | return nullptr; |
| 951 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 952 | return std::unique_ptr<ASTDoStatement>(new ASTDoStatement(start.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 953 | std::move(statement), |
| 954 | std::move(test))); |
| 955 | } |
| 956 | |
| 957 | /* WHILE LPAREN expression RPAREN STATEMENT */ |
| 958 | std::unique_ptr<ASTWhileStatement> Parser::whileStatement() { |
| 959 | Token start; |
| 960 | if (!this->expect(Token::WHILE, "'while'", &start)) { |
| 961 | return nullptr; |
| 962 | } |
| 963 | if (!this->expect(Token::LPAREN, "'('")) { |
| 964 | return nullptr; |
| 965 | } |
| 966 | std::unique_ptr<ASTExpression> test(this->expression()); |
| 967 | if (!test) { |
| 968 | return nullptr; |
| 969 | } |
| 970 | if (!this->expect(Token::RPAREN, "')'")) { |
| 971 | return nullptr; |
| 972 | } |
| 973 | std::unique_ptr<ASTStatement> statement(this->statement()); |
| 974 | if (!statement) { |
| 975 | return nullptr; |
| 976 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 977 | return std::unique_ptr<ASTWhileStatement>(new ASTWhileStatement(start.fPosition, |
| 978 | std::move(test), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 979 | std::move(statement))); |
| 980 | } |
| 981 | |
Ethan Nicholas | af19769 | 2017-02-27 13:26:45 -0500 | [diff] [blame^] | 982 | /* CASE expression COLON statement* */ |
| 983 | std::unique_ptr<ASTSwitchCase> Parser::switchCase() { |
| 984 | Token start; |
| 985 | if (!this->expect(Token::CASE, "'case'", &start)) { |
| 986 | return nullptr; |
| 987 | } |
| 988 | std::unique_ptr<ASTExpression> value = this->expression(); |
| 989 | if (!value) { |
| 990 | return nullptr; |
| 991 | } |
| 992 | if (!this->expect(Token::COLON, "':'")) { |
| 993 | return nullptr; |
| 994 | } |
| 995 | std::vector<std::unique_ptr<ASTStatement>> statements; |
| 996 | while (this->peek().fKind != Token::RBRACE && this->peek().fKind != Token::CASE && |
| 997 | this->peek().fKind != Token::DEFAULT) { |
| 998 | std::unique_ptr<ASTStatement> s = this->statement(); |
| 999 | if (!s) { |
| 1000 | return nullptr; |
| 1001 | } |
| 1002 | statements.push_back(std::move(s)); |
| 1003 | } |
| 1004 | return std::unique_ptr<ASTSwitchCase>(new ASTSwitchCase(start.fPosition, std::move(value), |
| 1005 | std::move(statements))); |
| 1006 | } |
| 1007 | |
| 1008 | /* SWITCH LPAREN expression RPAREN LBRACE switchCase* (DEFAULT COLON statement*)? RBRACE */ |
| 1009 | std::unique_ptr<ASTStatement> Parser::switchStatement() { |
| 1010 | Token start; |
| 1011 | if (!this->expect(Token::SWITCH, "'switch'", &start)) { |
| 1012 | return nullptr; |
| 1013 | } |
| 1014 | if (!this->expect(Token::LPAREN, "'('")) { |
| 1015 | return nullptr; |
| 1016 | } |
| 1017 | std::unique_ptr<ASTExpression> value(this->expression()); |
| 1018 | if (!value) { |
| 1019 | return nullptr; |
| 1020 | } |
| 1021 | if (!this->expect(Token::RPAREN, "')'")) { |
| 1022 | return nullptr; |
| 1023 | } |
| 1024 | if (!this->expect(Token::LBRACE, "'{'")) { |
| 1025 | return nullptr; |
| 1026 | } |
| 1027 | std::vector<std::unique_ptr<ASTSwitchCase>> cases; |
| 1028 | while (this->peek().fKind == Token::CASE) { |
| 1029 | std::unique_ptr<ASTSwitchCase> c = this->switchCase(); |
| 1030 | if (!c) { |
| 1031 | return nullptr; |
| 1032 | } |
| 1033 | cases.push_back(std::move(c)); |
| 1034 | } |
| 1035 | // Requiring default: to be last (in defiance of C and GLSL) was a deliberate decision. Other |
| 1036 | // parts of the compiler may rely upon this assumption. |
| 1037 | if (this->peek().fKind == Token::DEFAULT) { |
| 1038 | Token defaultStart; |
| 1039 | SkAssertResult(this->expect(Token::DEFAULT, "'default'", &defaultStart)); |
| 1040 | if (!this->expect(Token::COLON, "':'")) { |
| 1041 | return nullptr; |
| 1042 | } |
| 1043 | std::vector<std::unique_ptr<ASTStatement>> statements; |
| 1044 | while (this->peek().fKind != Token::RBRACE) { |
| 1045 | std::unique_ptr<ASTStatement> s = this->statement(); |
| 1046 | if (!s) { |
| 1047 | return nullptr; |
| 1048 | } |
| 1049 | statements.push_back(std::move(s)); |
| 1050 | } |
| 1051 | cases.emplace_back(new ASTSwitchCase(defaultStart.fPosition, nullptr, |
| 1052 | std::move(statements))); |
| 1053 | } |
| 1054 | if (!this->expect(Token::RBRACE, "'}'")) { |
| 1055 | return nullptr; |
| 1056 | } |
| 1057 | return std::unique_ptr<ASTStatement>(new ASTSwitchStatement(start.fPosition, |
| 1058 | std::move(value), |
| 1059 | std::move(cases))); |
| 1060 | } |
| 1061 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1062 | /* FOR LPAREN (declaration | expression)? SEMICOLON expression? SEMICOLON expression? RPAREN |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1063 | STATEMENT */ |
| 1064 | std::unique_ptr<ASTForStatement> Parser::forStatement() { |
| 1065 | Token start; |
| 1066 | if (!this->expect(Token::FOR, "'for'", &start)) { |
| 1067 | return nullptr; |
| 1068 | } |
| 1069 | if (!this->expect(Token::LPAREN, "'('")) { |
| 1070 | return nullptr; |
| 1071 | } |
| 1072 | std::unique_ptr<ASTStatement> initializer; |
| 1073 | Token nextToken = this->peek(); |
| 1074 | switch (nextToken.fKind) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1075 | case Token::SEMICOLON: |
ethannicholas | 22f939e | 2016-10-13 13:25:34 -0700 | [diff] [blame] | 1076 | this->nextToken(); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1077 | break; |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1078 | case Token::CONST: { |
| 1079 | std::unique_ptr<ASTVarDeclarations> vd = this->varDeclarations(); |
| 1080 | if (!vd) { |
| 1081 | return nullptr; |
| 1082 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1083 | initializer = std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement( |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1084 | std::move(vd))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1085 | break; |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1086 | } |
| 1087 | case Token::IDENTIFIER: { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1088 | if (this->isType(nextToken.fText)) { |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1089 | std::unique_ptr<ASTVarDeclarations> vd = this->varDeclarations(); |
| 1090 | if (!vd) { |
| 1091 | return nullptr; |
| 1092 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1093 | initializer = std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement( |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1094 | std::move(vd))); |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1095 | break; |
| 1096 | } |
ethannicholas | a54401d | 2016-10-14 08:37:32 -0700 | [diff] [blame] | 1097 | } // fall through |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1098 | default: |
| 1099 | initializer = this->expressionStatement(); |
| 1100 | } |
| 1101 | std::unique_ptr<ASTExpression> test; |
| 1102 | if (this->peek().fKind != Token::SEMICOLON) { |
| 1103 | test = this->expression(); |
| 1104 | if (!test) { |
| 1105 | return nullptr; |
| 1106 | } |
| 1107 | } |
| 1108 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1109 | return nullptr; |
| 1110 | } |
| 1111 | std::unique_ptr<ASTExpression> next; |
ethannicholas | 22f939e | 2016-10-13 13:25:34 -0700 | [diff] [blame] | 1112 | if (this->peek().fKind != Token::RPAREN) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1113 | next = this->expression(); |
| 1114 | if (!next) { |
| 1115 | return nullptr; |
| 1116 | } |
| 1117 | } |
| 1118 | if (!this->expect(Token::RPAREN, "')'")) { |
| 1119 | return nullptr; |
| 1120 | } |
| 1121 | std::unique_ptr<ASTStatement> statement(this->statement()); |
| 1122 | if (!statement) { |
| 1123 | return nullptr; |
| 1124 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1125 | return std::unique_ptr<ASTForStatement>(new ASTForStatement(start.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1126 | std::move(initializer), |
| 1127 | std::move(test), std::move(next), |
| 1128 | std::move(statement))); |
| 1129 | } |
| 1130 | |
| 1131 | /* RETURN expression? SEMICOLON */ |
| 1132 | std::unique_ptr<ASTReturnStatement> Parser::returnStatement() { |
| 1133 | Token start; |
| 1134 | if (!this->expect(Token::RETURN, "'return'", &start)) { |
| 1135 | return nullptr; |
| 1136 | } |
| 1137 | std::unique_ptr<ASTExpression> expression; |
| 1138 | if (this->peek().fKind != Token::SEMICOLON) { |
| 1139 | expression = this->expression(); |
| 1140 | if (!expression) { |
| 1141 | return nullptr; |
| 1142 | } |
| 1143 | } |
| 1144 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1145 | return nullptr; |
| 1146 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1147 | return std::unique_ptr<ASTReturnStatement>(new ASTReturnStatement(start.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1148 | std::move(expression))); |
| 1149 | } |
| 1150 | |
| 1151 | /* BREAK SEMICOLON */ |
| 1152 | std::unique_ptr<ASTBreakStatement> Parser::breakStatement() { |
| 1153 | Token start; |
| 1154 | if (!this->expect(Token::BREAK, "'break'", &start)) { |
| 1155 | return nullptr; |
| 1156 | } |
| 1157 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1158 | return nullptr; |
| 1159 | } |
| 1160 | return std::unique_ptr<ASTBreakStatement>(new ASTBreakStatement(start.fPosition)); |
| 1161 | } |
| 1162 | |
| 1163 | /* CONTINUE SEMICOLON */ |
| 1164 | std::unique_ptr<ASTContinueStatement> Parser::continueStatement() { |
| 1165 | Token start; |
| 1166 | if (!this->expect(Token::CONTINUE, "'continue'", &start)) { |
| 1167 | return nullptr; |
| 1168 | } |
| 1169 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1170 | return nullptr; |
| 1171 | } |
| 1172 | return std::unique_ptr<ASTContinueStatement>(new ASTContinueStatement(start.fPosition)); |
| 1173 | } |
| 1174 | |
| 1175 | /* DISCARD SEMICOLON */ |
| 1176 | std::unique_ptr<ASTDiscardStatement> Parser::discardStatement() { |
| 1177 | Token start; |
| 1178 | if (!this->expect(Token::DISCARD, "'continue'", &start)) { |
| 1179 | return nullptr; |
| 1180 | } |
| 1181 | if (!this->expect(Token::SEMICOLON, "';'")) { |
| 1182 | return nullptr; |
| 1183 | } |
| 1184 | return std::unique_ptr<ASTDiscardStatement>(new ASTDiscardStatement(start.fPosition)); |
| 1185 | } |
| 1186 | |
| 1187 | /* LBRACE statement* RBRACE */ |
| 1188 | std::unique_ptr<ASTBlock> Parser::block() { |
ethannicholas | cad6416 | 2016-10-27 10:54:02 -0700 | [diff] [blame] | 1189 | AutoDepth depth(this); |
| 1190 | if (!depth.checkValid()) { |
| 1191 | return nullptr; |
| 1192 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1193 | Token start; |
| 1194 | if (!this->expect(Token::LBRACE, "'{'", &start)) { |
| 1195 | return nullptr; |
| 1196 | } |
| 1197 | std::vector<std::unique_ptr<ASTStatement>> statements; |
| 1198 | for (;;) { |
| 1199 | switch (this->peek().fKind) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1200 | case Token::RBRACE: |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1201 | this->nextToken(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1202 | return std::unique_ptr<ASTBlock>(new ASTBlock(start.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1203 | std::move(statements))); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1204 | case Token::END_OF_FILE: |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1205 | this->error(this->peek().fPosition, "expected '}', but found end of file"); |
| 1206 | return nullptr; |
| 1207 | default: { |
| 1208 | std::unique_ptr<ASTStatement> statement = this->statement(); |
| 1209 | if (!statement) { |
| 1210 | return nullptr; |
| 1211 | } |
| 1212 | statements.push_back(std::move(statement)); |
| 1213 | } |
| 1214 | } |
| 1215 | } |
| 1216 | } |
| 1217 | |
| 1218 | /* expression SEMICOLON */ |
| 1219 | std::unique_ptr<ASTExpressionStatement> Parser::expressionStatement() { |
| 1220 | std::unique_ptr<ASTExpression> expr = this->expression(); |
| 1221 | if (expr) { |
| 1222 | if (this->expect(Token::SEMICOLON, "';'")) { |
| 1223 | ASTExpressionStatement* result = new ASTExpressionStatement(std::move(expr)); |
| 1224 | return std::unique_ptr<ASTExpressionStatement>(result); |
| 1225 | } |
| 1226 | } |
| 1227 | return nullptr; |
| 1228 | } |
| 1229 | |
| 1230 | /* assignmentExpression */ |
| 1231 | std::unique_ptr<ASTExpression> Parser::expression() { |
ethannicholas | cad6416 | 2016-10-27 10:54:02 -0700 | [diff] [blame] | 1232 | AutoDepth depth(this); |
| 1233 | if (!depth.checkValid()) { |
| 1234 | return nullptr; |
| 1235 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1236 | return this->assignmentExpression(); |
| 1237 | } |
| 1238 | |
| 1239 | /* ternaryExpression ((EQEQ | STAREQ | SLASHEQ | PERCENTEQ | PLUSEQ | MINUSEQ | SHLEQ | SHREQ | |
| 1240 | BITWISEANDEQ | BITWISEXOREQ | BITWISEOREQ | LOGICALANDEQ | LOGICALXOREQ | LOGICALOREQ) |
| 1241 | assignmentExpression)* |
| 1242 | */ |
| 1243 | std::unique_ptr<ASTExpression> Parser::assignmentExpression() { |
| 1244 | std::unique_ptr<ASTExpression> result = this->ternaryExpression(); |
| 1245 | if (!result) { |
| 1246 | return nullptr; |
| 1247 | } |
| 1248 | for (;;) { |
| 1249 | switch (this->peek().fKind) { |
| 1250 | case Token::EQ: // fall through |
| 1251 | case Token::STAREQ: // fall through |
| 1252 | case Token::SLASHEQ: // fall through |
| 1253 | case Token::PERCENTEQ: // fall through |
| 1254 | case Token::PLUSEQ: // fall through |
| 1255 | case Token::MINUSEQ: // fall through |
| 1256 | case Token::SHLEQ: // fall through |
| 1257 | case Token::SHREQ: // fall through |
| 1258 | case Token::BITWISEANDEQ: // fall through |
| 1259 | case Token::BITWISEXOREQ: // fall through |
| 1260 | case Token::BITWISEOREQ: // fall through |
| 1261 | case Token::LOGICALANDEQ: // fall through |
| 1262 | case Token::LOGICALXOREQ: // fall through |
| 1263 | case Token::LOGICALOREQ: { |
| 1264 | Token t = this->nextToken(); |
| 1265 | std::unique_ptr<ASTExpression> right = this->assignmentExpression(); |
| 1266 | if (!right) { |
| 1267 | return nullptr; |
| 1268 | } |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1269 | result = std::unique_ptr<ASTExpression>(new ASTBinaryExpression(std::move(result), |
| 1270 | t, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1271 | std::move(right))); |
| 1272 | } |
| 1273 | default: |
| 1274 | return result; |
| 1275 | } |
| 1276 | } |
| 1277 | } |
| 1278 | |
| 1279 | /* logicalOrExpression ('?' expression ':' assignmentExpression)? */ |
| 1280 | std::unique_ptr<ASTExpression> Parser::ternaryExpression() { |
| 1281 | std::unique_ptr<ASTExpression> result = this->logicalOrExpression(); |
| 1282 | if (!result) { |
| 1283 | return nullptr; |
| 1284 | } |
| 1285 | if (this->peek().fKind == Token::QUESTION) { |
| 1286 | Token question = this->nextToken(); |
| 1287 | std::unique_ptr<ASTExpression> trueExpr = this->expression(); |
| 1288 | if (!trueExpr) { |
| 1289 | return nullptr; |
| 1290 | } |
| 1291 | if (this->expect(Token::COLON, "':'")) { |
| 1292 | std::unique_ptr<ASTExpression> falseExpr = this->assignmentExpression(); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1293 | return std::unique_ptr<ASTExpression>(new ASTTernaryExpression(std::move(result), |
| 1294 | std::move(trueExpr), |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1295 | std::move(falseExpr))); |
| 1296 | } |
| 1297 | return nullptr; |
| 1298 | } |
| 1299 | return result; |
| 1300 | } |
| 1301 | |
| 1302 | /* logicalXorExpression (LOGICALOR logicalXorExpression)* */ |
| 1303 | std::unique_ptr<ASTExpression> Parser::logicalOrExpression() { |
| 1304 | std::unique_ptr<ASTExpression> result = this->logicalXorExpression(); |
| 1305 | if (!result) { |
| 1306 | return nullptr; |
| 1307 | } |
| 1308 | while (this->peek().fKind == Token::LOGICALOR) { |
| 1309 | Token t = this->nextToken(); |
| 1310 | std::unique_ptr<ASTExpression> right = this->logicalXorExpression(); |
| 1311 | if (!right) { |
| 1312 | return nullptr; |
| 1313 | } |
| 1314 | result.reset(new ASTBinaryExpression(std::move(result), t, std::move(right))); |
| 1315 | } |
| 1316 | return result; |
| 1317 | } |
| 1318 | |
| 1319 | /* logicalAndExpression (LOGICALXOR logicalAndExpression)* */ |
| 1320 | std::unique_ptr<ASTExpression> Parser::logicalXorExpression() { |
| 1321 | std::unique_ptr<ASTExpression> result = this->logicalAndExpression(); |
| 1322 | if (!result) { |
| 1323 | return nullptr; |
| 1324 | } |
| 1325 | while (this->peek().fKind == Token::LOGICALXOR) { |
| 1326 | Token t = this->nextToken(); |
| 1327 | std::unique_ptr<ASTExpression> right = this->logicalAndExpression(); |
| 1328 | if (!right) { |
| 1329 | return nullptr; |
| 1330 | } |
| 1331 | result.reset(new ASTBinaryExpression(std::move(result), t, std::move(right))); |
| 1332 | } |
| 1333 | return result; |
| 1334 | } |
| 1335 | |
| 1336 | /* bitwiseOrExpression (LOGICALAND bitwiseOrExpression)* */ |
| 1337 | std::unique_ptr<ASTExpression> Parser::logicalAndExpression() { |
| 1338 | std::unique_ptr<ASTExpression> result = this->bitwiseOrExpression(); |
| 1339 | if (!result) { |
| 1340 | return nullptr; |
| 1341 | } |
| 1342 | while (this->peek().fKind == Token::LOGICALAND) { |
| 1343 | Token t = this->nextToken(); |
| 1344 | std::unique_ptr<ASTExpression> right = this->bitwiseOrExpression(); |
| 1345 | if (!right) { |
| 1346 | return nullptr; |
| 1347 | } |
| 1348 | result.reset(new ASTBinaryExpression(std::move(result), t, std::move(right))); |
| 1349 | } |
| 1350 | return result; |
| 1351 | } |
| 1352 | |
| 1353 | /* bitwiseXorExpression (BITWISEOR bitwiseXorExpression)* */ |
| 1354 | std::unique_ptr<ASTExpression> Parser::bitwiseOrExpression() { |
| 1355 | std::unique_ptr<ASTExpression> result = this->bitwiseXorExpression(); |
| 1356 | if (!result) { |
| 1357 | return nullptr; |
| 1358 | } |
| 1359 | while (this->peek().fKind == Token::BITWISEOR) { |
| 1360 | Token t = this->nextToken(); |
| 1361 | std::unique_ptr<ASTExpression> right = this->bitwiseXorExpression(); |
| 1362 | if (!right) { |
| 1363 | return nullptr; |
| 1364 | } |
| 1365 | result.reset(new ASTBinaryExpression(std::move(result), t, std::move(right))); |
| 1366 | } |
| 1367 | return result; |
| 1368 | } |
| 1369 | |
| 1370 | /* bitwiseAndExpression (BITWISEXOR bitwiseAndExpression)* */ |
| 1371 | std::unique_ptr<ASTExpression> Parser::bitwiseXorExpression() { |
| 1372 | std::unique_ptr<ASTExpression> result = this->bitwiseAndExpression(); |
| 1373 | if (!result) { |
| 1374 | return nullptr; |
| 1375 | } |
| 1376 | while (this->peek().fKind == Token::BITWISEXOR) { |
| 1377 | Token t = this->nextToken(); |
| 1378 | std::unique_ptr<ASTExpression> right = this->bitwiseAndExpression(); |
| 1379 | if (!right) { |
| 1380 | return nullptr; |
| 1381 | } |
| 1382 | result.reset(new ASTBinaryExpression(std::move(result), t, std::move(right))); |
| 1383 | } |
| 1384 | return result; |
| 1385 | } |
| 1386 | |
| 1387 | /* equalityExpression (BITWISEAND equalityExpression)* */ |
| 1388 | std::unique_ptr<ASTExpression> Parser::bitwiseAndExpression() { |
| 1389 | std::unique_ptr<ASTExpression> result = this->equalityExpression(); |
| 1390 | if (!result) { |
| 1391 | return nullptr; |
| 1392 | } |
| 1393 | while (this->peek().fKind == Token::BITWISEAND) { |
| 1394 | Token t = this->nextToken(); |
| 1395 | std::unique_ptr<ASTExpression> right = this->equalityExpression(); |
| 1396 | if (!right) { |
| 1397 | return nullptr; |
| 1398 | } |
| 1399 | result.reset(new ASTBinaryExpression(std::move(result), t, std::move(right))); |
| 1400 | } |
| 1401 | return result; |
| 1402 | } |
| 1403 | |
| 1404 | /* relationalExpression ((EQEQ | NEQ) relationalExpression)* */ |
| 1405 | std::unique_ptr<ASTExpression> Parser::equalityExpression() { |
| 1406 | std::unique_ptr<ASTExpression> result = this->relationalExpression(); |
| 1407 | if (!result) { |
| 1408 | return nullptr; |
| 1409 | } |
| 1410 | for (;;) { |
| 1411 | switch (this->peek().fKind) { |
| 1412 | case Token::EQEQ: // fall through |
| 1413 | case Token::NEQ: { |
| 1414 | Token t = this->nextToken(); |
| 1415 | std::unique_ptr<ASTExpression> right = this->relationalExpression(); |
| 1416 | if (!right) { |
| 1417 | return nullptr; |
| 1418 | } |
| 1419 | result.reset(new ASTBinaryExpression(std::move(result), t, std::move(right))); |
| 1420 | break; |
| 1421 | } |
| 1422 | default: |
| 1423 | return result; |
| 1424 | } |
| 1425 | } |
| 1426 | } |
| 1427 | |
| 1428 | /* shiftExpression ((LT | GT | LTEQ | GTEQ) shiftExpression)* */ |
| 1429 | std::unique_ptr<ASTExpression> Parser::relationalExpression() { |
| 1430 | std::unique_ptr<ASTExpression> result = this->shiftExpression(); |
| 1431 | if (!result) { |
| 1432 | return nullptr; |
| 1433 | } |
| 1434 | for (;;) { |
| 1435 | switch (this->peek().fKind) { |
| 1436 | case Token::LT: // fall through |
| 1437 | case Token::GT: // fall through |
| 1438 | case Token::LTEQ: // fall through |
| 1439 | case Token::GTEQ: { |
| 1440 | Token t = this->nextToken(); |
| 1441 | std::unique_ptr<ASTExpression> right = this->shiftExpression(); |
| 1442 | if (!right) { |
| 1443 | return nullptr; |
| 1444 | } |
| 1445 | result.reset(new ASTBinaryExpression(std::move(result), t, std::move(right))); |
| 1446 | break; |
| 1447 | } |
| 1448 | default: |
| 1449 | return result; |
| 1450 | } |
| 1451 | } |
| 1452 | } |
| 1453 | |
| 1454 | /* additiveExpression ((SHL | SHR) additiveExpression)* */ |
| 1455 | std::unique_ptr<ASTExpression> Parser::shiftExpression() { |
| 1456 | std::unique_ptr<ASTExpression> result = this->additiveExpression(); |
| 1457 | if (!result) { |
| 1458 | return nullptr; |
| 1459 | } |
| 1460 | for (;;) { |
| 1461 | switch (this->peek().fKind) { |
| 1462 | case Token::SHL: // fall through |
| 1463 | case Token::SHR: { |
| 1464 | Token t = this->nextToken(); |
| 1465 | std::unique_ptr<ASTExpression> right = this->additiveExpression(); |
| 1466 | if (!right) { |
| 1467 | return nullptr; |
| 1468 | } |
| 1469 | result.reset(new ASTBinaryExpression(std::move(result), t, std::move(right))); |
| 1470 | break; |
| 1471 | } |
| 1472 | default: |
| 1473 | return result; |
| 1474 | } |
| 1475 | } |
| 1476 | } |
| 1477 | |
| 1478 | /* multiplicativeExpression ((PLUS | MINUS) multiplicativeExpression)* */ |
| 1479 | std::unique_ptr<ASTExpression> Parser::additiveExpression() { |
| 1480 | std::unique_ptr<ASTExpression> result = this->multiplicativeExpression(); |
| 1481 | if (!result) { |
| 1482 | return nullptr; |
| 1483 | } |
| 1484 | for (;;) { |
| 1485 | switch (this->peek().fKind) { |
| 1486 | case Token::PLUS: // fall through |
| 1487 | case Token::MINUS: { |
| 1488 | Token t = this->nextToken(); |
| 1489 | std::unique_ptr<ASTExpression> right = this->multiplicativeExpression(); |
| 1490 | if (!right) { |
| 1491 | return nullptr; |
| 1492 | } |
| 1493 | result.reset(new ASTBinaryExpression(std::move(result), t, std::move(right))); |
| 1494 | break; |
| 1495 | } |
| 1496 | default: |
| 1497 | return result; |
| 1498 | } |
| 1499 | } |
| 1500 | } |
| 1501 | |
| 1502 | /* unaryExpression ((STAR | SLASH | PERCENT) unaryExpression)* */ |
| 1503 | std::unique_ptr<ASTExpression> Parser::multiplicativeExpression() { |
| 1504 | std::unique_ptr<ASTExpression> result = this->unaryExpression(); |
| 1505 | if (!result) { |
| 1506 | return nullptr; |
| 1507 | } |
| 1508 | for (;;) { |
| 1509 | switch (this->peek().fKind) { |
| 1510 | case Token::STAR: // fall through |
| 1511 | case Token::SLASH: // fall through |
| 1512 | case Token::PERCENT: { |
| 1513 | Token t = this->nextToken(); |
| 1514 | std::unique_ptr<ASTExpression> right = this->unaryExpression(); |
| 1515 | if (!right) { |
| 1516 | return nullptr; |
| 1517 | } |
| 1518 | result.reset(new ASTBinaryExpression(std::move(result), t, std::move(right))); |
| 1519 | break; |
| 1520 | } |
| 1521 | default: |
| 1522 | return result; |
| 1523 | } |
| 1524 | } |
| 1525 | } |
| 1526 | |
| 1527 | /* postfixExpression | (PLUS | MINUS | NOT | PLUSPLUS | MINUSMINUS) unaryExpression */ |
| 1528 | std::unique_ptr<ASTExpression> Parser::unaryExpression() { |
| 1529 | switch (this->peek().fKind) { |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 1530 | case Token::PLUS: // fall through |
| 1531 | case Token::MINUS: // fall through |
| 1532 | case Token::LOGICALNOT: // fall through |
| 1533 | case Token::BITWISENOT: // fall through |
| 1534 | case Token::PLUSPLUS: // fall through |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1535 | case Token::MINUSMINUS: { |
| 1536 | Token t = this->nextToken(); |
| 1537 | std::unique_ptr<ASTExpression> expr = this->unaryExpression(); |
| 1538 | if (!expr) { |
| 1539 | return nullptr; |
| 1540 | } |
| 1541 | return std::unique_ptr<ASTExpression>(new ASTPrefixExpression(t, std::move(expr))); |
| 1542 | } |
| 1543 | default: |
| 1544 | return this->postfixExpression(); |
| 1545 | } |
| 1546 | } |
| 1547 | |
| 1548 | /* term suffix* */ |
| 1549 | std::unique_ptr<ASTExpression> Parser::postfixExpression() { |
| 1550 | std::unique_ptr<ASTExpression> result = this->term(); |
| 1551 | if (!result) { |
| 1552 | return nullptr; |
| 1553 | } |
| 1554 | for (;;) { |
| 1555 | switch (this->peek().fKind) { |
| 1556 | case Token::LBRACKET: // fall through |
| 1557 | case Token::DOT: // fall through |
| 1558 | case Token::LPAREN: // fall through |
| 1559 | case Token::PLUSPLUS: // fall through |
| 1560 | case Token::MINUSMINUS: { |
| 1561 | std::unique_ptr<ASTSuffix> s = this->suffix(); |
| 1562 | if (!s) { |
| 1563 | return nullptr; |
| 1564 | } |
| 1565 | result.reset(new ASTSuffixExpression(std::move(result), std::move(s))); |
| 1566 | break; |
| 1567 | } |
| 1568 | default: |
| 1569 | return result; |
| 1570 | } |
| 1571 | } |
| 1572 | } |
| 1573 | |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1574 | /* LBRACKET expression? RBRACKET | DOT IDENTIFIER | LPAREN parameters RPAREN | |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1575 | PLUSPLUS | MINUSMINUS */ |
| 1576 | std::unique_ptr<ASTSuffix> Parser::suffix() { |
| 1577 | Token next = this->nextToken(); |
| 1578 | switch (next.fKind) { |
| 1579 | case Token::LBRACKET: { |
ethannicholas | 5961bc9 | 2016-10-12 06:39:56 -0700 | [diff] [blame] | 1580 | if (this->peek().fKind == Token::RBRACKET) { |
| 1581 | this->nextToken(); |
| 1582 | return std::unique_ptr<ASTSuffix>(new ASTIndexSuffix(next.fPosition)); |
| 1583 | } |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1584 | std::unique_ptr<ASTExpression> e = this->expression(); |
| 1585 | if (!e) { |
| 1586 | return nullptr; |
| 1587 | } |
| 1588 | this->expect(Token::RBRACKET, "']' to complete array access expression"); |
| 1589 | return std::unique_ptr<ASTSuffix>(new ASTIndexSuffix(std::move(e))); |
| 1590 | } |
| 1591 | case Token::DOT: { |
| 1592 | Position pos = this->peek().fPosition; |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 1593 | SkString text; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1594 | if (this->identifier(&text)) { |
| 1595 | return std::unique_ptr<ASTSuffix>(new ASTFieldSuffix(pos, std::move(text))); |
| 1596 | } |
| 1597 | return nullptr; |
| 1598 | } |
| 1599 | case Token::LPAREN: { |
| 1600 | std::vector<std::unique_ptr<ASTExpression>> parameters; |
| 1601 | if (this->peek().fKind != Token::RPAREN) { |
| 1602 | for (;;) { |
| 1603 | std::unique_ptr<ASTExpression> expr = this->expression(); |
| 1604 | if (!expr) { |
| 1605 | return nullptr; |
| 1606 | } |
| 1607 | parameters.push_back(std::move(expr)); |
| 1608 | if (this->peek().fKind != Token::COMMA) { |
| 1609 | break; |
| 1610 | } |
| 1611 | this->nextToken(); |
| 1612 | } |
| 1613 | } |
| 1614 | this->expect(Token::RPAREN, "')' to complete function parameters"); |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1615 | return std::unique_ptr<ASTSuffix>(new ASTCallSuffix(next.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1616 | std::move(parameters))); |
| 1617 | } |
| 1618 | case Token::PLUSPLUS: |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1619 | return std::unique_ptr<ASTSuffix>(new ASTSuffix(next.fPosition, |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1620 | ASTSuffix::kPostIncrement_Kind)); |
| 1621 | case Token::MINUSMINUS: |
| 1622 | return std::unique_ptr<ASTSuffix>(new ASTSuffix(next.fPosition, |
| 1623 | ASTSuffix::kPostDecrement_Kind)); |
| 1624 | default: { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1625 | this->error(next.fPosition, "expected expression suffix, but found '" + next.fText + |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1626 | "'\n"); |
| 1627 | return nullptr; |
| 1628 | } |
| 1629 | } |
| 1630 | } |
| 1631 | |
| 1632 | /* IDENTIFIER | intLiteral | floatLiteral | boolLiteral | '(' expression ')' */ |
| 1633 | std::unique_ptr<ASTExpression> Parser::term() { |
| 1634 | std::unique_ptr<ASTExpression> result; |
| 1635 | Token t = this->peek(); |
| 1636 | switch (t.fKind) { |
| 1637 | case Token::IDENTIFIER: { |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 1638 | SkString text; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1639 | if (this->identifier(&text)) { |
| 1640 | result.reset(new ASTIdentifier(t.fPosition, std::move(text))); |
| 1641 | } |
| 1642 | break; |
| 1643 | } |
| 1644 | case Token::INT_LITERAL: { |
| 1645 | int64_t i; |
| 1646 | if (this->intLiteral(&i)) { |
| 1647 | result.reset(new ASTIntLiteral(t.fPosition, i)); |
| 1648 | } |
| 1649 | break; |
| 1650 | } |
| 1651 | case Token::FLOAT_LITERAL: { |
| 1652 | double f; |
| 1653 | if (this->floatLiteral(&f)) { |
| 1654 | result.reset(new ASTFloatLiteral(t.fPosition, f)); |
| 1655 | } |
| 1656 | break; |
| 1657 | } |
| 1658 | case Token::TRUE_LITERAL: // fall through |
| 1659 | case Token::FALSE_LITERAL: { |
| 1660 | bool b; |
| 1661 | if (this->boolLiteral(&b)) { |
| 1662 | result.reset(new ASTBoolLiteral(t.fPosition, b)); |
| 1663 | } |
| 1664 | break; |
| 1665 | } |
| 1666 | case Token::LPAREN: { |
| 1667 | this->nextToken(); |
| 1668 | result = this->expression(); |
| 1669 | if (result) { |
| 1670 | this->expect(Token::RPAREN, "')' to complete expression"); |
| 1671 | } |
| 1672 | break; |
| 1673 | } |
| 1674 | default: |
| 1675 | this->nextToken(); |
| 1676 | this->error(t.fPosition, "expected expression, but found '" + t.fText + "'\n"); |
| 1677 | result = nullptr; |
| 1678 | } |
| 1679 | return result; |
| 1680 | } |
| 1681 | |
| 1682 | /* INT_LITERAL */ |
| 1683 | bool Parser::intLiteral(int64_t* dest) { |
| 1684 | Token t; |
| 1685 | if (this->expect(Token::INT_LITERAL, "integer literal", &t)) { |
| 1686 | *dest = SkSL::stol(t.fText); |
| 1687 | return true; |
| 1688 | } |
| 1689 | return false; |
| 1690 | } |
| 1691 | |
| 1692 | /* FLOAT_LITERAL */ |
| 1693 | bool Parser::floatLiteral(double* dest) { |
| 1694 | Token t; |
| 1695 | if (this->expect(Token::FLOAT_LITERAL, "float literal", &t)) { |
| 1696 | *dest = SkSL::stod(t.fText); |
| 1697 | return true; |
| 1698 | } |
| 1699 | return false; |
| 1700 | } |
| 1701 | |
| 1702 | /* TRUE_LITERAL | FALSE_LITERAL */ |
| 1703 | bool Parser::boolLiteral(bool* dest) { |
| 1704 | Token t = this->nextToken(); |
| 1705 | switch (t.fKind) { |
| 1706 | case Token::TRUE_LITERAL: |
| 1707 | *dest = true; |
| 1708 | return true; |
| 1709 | case Token::FALSE_LITERAL: |
| 1710 | *dest = false; |
| 1711 | return true; |
| 1712 | default: |
| 1713 | this->error(t.fPosition, "expected 'true' or 'false', but found '" + t.fText + "'\n"); |
| 1714 | return false; |
| 1715 | } |
| 1716 | } |
| 1717 | |
| 1718 | /* IDENTIFIER */ |
Ethan Nicholas | 9e1138d | 2016-11-21 10:39:35 -0500 | [diff] [blame] | 1719 | bool Parser::identifier(SkString* dest) { |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1720 | Token t; |
| 1721 | if (this->expect(Token::IDENTIFIER, "identifier", &t)) { |
Ethan Nicholas | 11d5397 | 2016-11-28 11:23:23 -0500 | [diff] [blame] | 1722 | *dest = t.fText; |
ethannicholas | b3058bd | 2016-07-01 08:22:01 -0700 | [diff] [blame] | 1723 | return true; |
| 1724 | } |
| 1725 | return false; |
| 1726 | } |
| 1727 | |
| 1728 | } // namespace |