diff options
author | Ethan Nicholas <ethannicholas@google.com> | 2017-09-07 15:44:01 -0400 |
---|---|---|
committer | Skia Commit-Bot <skia-commit-bot@chromium.org> | 2017-09-11 16:17:00 +0000 |
commit | c576e93d174f3106e072a2f506bca3990b541265 (patch) | |
tree | d4a410200aa71183c95643535b440bec919f2e18 /src/sksl/SkSLParser.cpp | |
parent | a2bdf005f3c706065d1aa93f319f4b73932721d4 (diff) |
Switch to the new SkSL lexer.
This completely replaces flex with a new in-house lexical analyzer generator,
which we have done for performance and memory usage reasons. Flex requires us
to copy strings every time we need the text of a token, whereas this new lexer
allows us to handle strings as a (non-null-terminated) pointer and length
everywhere, eliminating most string copies.
Bug: skia:
Change-Id: I2add26efc9e20cb699520e82abcf713af3968aca
Reviewed-on: https://skia-review.googlesource.com/39780
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Diffstat (limited to 'src/sksl/SkSLParser.cpp')
-rw-r--r-- | src/sksl/SkSLParser.cpp | 337 |
1 files changed, 151 insertions, 186 deletions
diff --git a/src/sksl/SkSLParser.cpp b/src/sksl/SkSLParser.cpp index f712b34e1a..d8ecc618bc 100644 --- a/src/sksl/SkSLParser.cpp +++ b/src/sksl/SkSLParser.cpp @@ -7,26 +7,6 @@ #include "stdio.h" #include "SkSLParser.h" -#include "SkSLToken.h" - -#define register -#include "disable_flex_warnings.h" -#include "lex.sksl.c" -static_assert(YY_FLEX_MAJOR_VERSION * 10000 + YY_FLEX_MINOR_VERSION * 100 + - YY_FLEX_SUBMINOR_VERSION >= 20601, - "we require Flex 2.6.1 or better for security reasons"); -#undef register -#ifdef __clang__ -#pragma clang diagnostic pop -#endif -#ifdef __GNUC__ -#pragma GCC diagnostic pop -#endif -#ifdef _MSC_VER -#pragma warning(pop) -#endif - -#include "lex.layout.h" #include "ast/SkSLASTBinaryExpression.h" #include "ast/SkSLASTBlock.h" #include "ast/SkSLASTBoolLiteral.h" @@ -83,7 +63,7 @@ public: bool checkValid() { if (fParser->fDepth > MAX_PARSE_DEPTH) { - fParser->error(fParser->peek().fPosition, String("exceeded max parse depth")); + fParser->error(fParser->peek(), String("exceeded max parse depth")); return false; } return true; @@ -93,20 +73,12 @@ private: Parser* fParser; }; -Parser::Parser(String text, SymbolTable& types, ErrorReporter& errors) -: fPushback(Position(-1, -1), Token::INVALID_TOKEN, String()) +Parser::Parser(const char* text, size_t length, SymbolTable& types, ErrorReporter& errors) +: fText(text) +, fPushback(Token::INVALID, -1, -1) , fTypes(types) , fErrors(errors) { - sksllex_init(&fScanner); - layoutlex_init(&fLayoutScanner); - fBuffer = sksl_scan_string(text.c_str(), fScanner); - skslset_lineno(1, fScanner); -} - -Parser::~Parser() { - sksl_delete_buffer(fBuffer, fScanner); - sksllex_destroy(fScanner); - layoutlex_destroy(fLayoutScanner); + fLexer.start(text, length); } /* (precision | directive | section | declaration)* END_OF_FILE */ @@ -148,53 +120,39 @@ std::vector<std::unique_ptr<ASTDeclaration>> Parser::file() { } } -Token Parser::nextRawToken(bool needText) { - if (fPushback.fKind != Token::INVALID_TOKEN) { - Token result(std::move(fPushback)); - fPushback.fKind = Token::INVALID_TOKEN; - fPushback.fText.clear(); +Token Parser::nextRawToken() { + if (fPushback.fKind != Token::INVALID) { + Token result = fPushback; + fPushback.fKind = Token::INVALID; return result; } - Token::Kind kind = (Token::Kind) sksllex(fScanner); - if (!needText) { - switch (kind) { - case Token::Kind::DIRECTIVE: // fall through - case Token::Kind::IDENTIFIER: // fall through - case Token::Kind::INT_LITERAL: // fall through - case Token::Kind::FLOAT_LITERAL: // fall through - case Token::Kind::SECTION: - needText = true; - default: - break; - } - } - static String unavailable("<unavailable>"); - return Token(Position(skslget_lineno(fScanner), -1), kind, - needText ? String(skslget_text(fScanner)) : unavailable); + Token result = fLexer.next(); + return result; } Token Parser::nextToken() { - Token token; - do { - token = this->nextRawToken(false); - } while (token.fKind == Token::WHITESPACE); + Token token = this->nextRawToken(); + while (token.fKind == Token::WHITESPACE || token.fKind == Token::LINE_COMMENT || + token.fKind == Token::BLOCK_COMMENT) { + token = this->nextRawToken(); + } return token; } void Parser::pushback(Token t) { - ASSERT(fPushback.fKind == Token::INVALID_TOKEN); + ASSERT(fPushback.fKind == Token::INVALID); fPushback = std::move(t); } Token Parser::peek() { - if (fPushback.fKind == Token::INVALID_TOKEN) { + if (fPushback.fKind == Token::INVALID) { fPushback = this->nextToken(); } return fPushback; } bool Parser::checkNext(Token::Kind kind, Token* result) { - if (fPushback.fKind != Token::INVALID_TOKEN && fPushback.fKind != kind) { + if (fPushback.fKind != Token::INVALID && fPushback.fKind != kind) { return false; } Token next = this->nextToken(); @@ -216,25 +174,25 @@ bool Parser::expect(Token::Kind kind, const char* expected, Token* result) { } return true; } else { - if (next.fText.size()) { - this->error(next.fPosition, "expected " + String(expected) + ", but found '" + - next.fText + "'"); - } else { - this->error(next.fPosition, "parse error, recompile in debug mode for details"); - } + this->error(next, "expected " + String(expected) + ", but found '" + + this->text(next) + "'"); return false; } } -void Parser::error(Position p, const char* msg) { - this->error(p, String(msg)); +StringFragment Parser::text(Token token) { + return StringFragment(fText + token.fOffset, token.fLength); +} + +void Parser::error(Token token, String msg) { + this->error(token.fOffset, msg); } -void Parser::error(Position p, String msg) { - fErrors.error(p, msg); +void Parser::error(int offset, String msg) { + fErrors.error(offset, msg); } -bool Parser::isType(const String& name) { +bool Parser::isType(StringFragment name) { return nullptr != fTypes[name]; } @@ -256,8 +214,8 @@ std::unique_ptr<ASTDeclaration> Parser::precision() { result = Modifiers::kHighp_Flag; break; default: - this->error(p.fPosition, "expected 'lowp', 'mediump', or 'highp', but found '" + - p.fText + "'"); + this->error(p, "expected 'lowp', 'mediump', or 'highp', but found '" + + this->text(p) + "'"); return nullptr; } // FIXME handle the type @@ -265,7 +223,7 @@ std::unique_ptr<ASTDeclaration> Parser::precision() { return nullptr; } this->expect(Token::SEMICOLON, "';'"); - return std::unique_ptr<ASTDeclaration>(new ASTPrecision(p.fPosition, result)); + return std::unique_ptr<ASTDeclaration>(new ASTPrecision(p.fOffset, result)); } /* DIRECTIVE(#version) INT_LITERAL ("es" | "compatibility")? | @@ -275,16 +233,18 @@ std::unique_ptr<ASTDeclaration> Parser::directive() { if (!this->expect(Token::DIRECTIVE, "a directive", &start)) { return nullptr; } - if (start.fText == "#version") { + StringFragment text = this->text(start); + if (text == "#version") { this->expect(Token::INT_LITERAL, "a version number"); Token next = this->peek(); - if (next.fText == "es" || next.fText == "compatibility") { + StringFragment nextText = this->text(next); + if (nextText == "es" || nextText == "compatibility") { this->nextToken(); } // version is ignored for now; it will eventually become an error when we stop pretending // to be GLSL return nullptr; - } else if (start.fText == "#extension") { + } else if (text == "#extension") { Token name; if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { return nullptr; @@ -296,10 +256,10 @@ std::unique_ptr<ASTDeclaration> Parser::directive() { if (!this->expect(Token::IDENTIFIER, "an identifier")) { return nullptr; } - return std::unique_ptr<ASTDeclaration>(new ASTExtension(start.fPosition, - std::move(name.fText))); + return std::unique_ptr<ASTDeclaration>(new ASTExtension(start.fOffset, + String(this->text(name)))); } else { - this->error(start.fPosition, "unsupported directive '" + start.fText + "'"); + this->error(start, "unsupported directive '" + this->text(start) + "'"); return nullptr; } } @@ -318,7 +278,7 @@ std::unique_ptr<ASTDeclaration> Parser::section() { if (!this->expect(Token::IDENTIFIER, "an identifier", &argToken)) { return nullptr; } - argument = argToken.fText; + argument = this->text(argToken); if (!this->expect(Token::RPAREN, "')'")) { return nullptr; } @@ -329,7 +289,7 @@ std::unique_ptr<ASTDeclaration> Parser::section() { String text; int level = 1; for (;;) { - Token next = this->nextRawToken(true); + Token next = this->nextRawToken(); switch (next.fKind) { case Token::LBRACE: ++level; @@ -338,7 +298,7 @@ std::unique_ptr<ASTDeclaration> Parser::section() { --level; break; case Token::END_OF_FILE: - this->error(start.fPosition, "reached end of file while parsing section"); + this->error(start, "reached end of file while parsing section"); return nullptr; default: break; @@ -346,10 +306,13 @@ std::unique_ptr<ASTDeclaration> Parser::section() { if (!level) { break; } - text += next.fText; + text += this->text(next); } - return std::unique_ptr<ASTDeclaration>(new ASTSection(start.fPosition, - String(start.fText.c_str() + 1), + StringFragment name = this->text(start); + ++name.fChars; + --name.fLength; + return std::unique_ptr<ASTDeclaration>(new ASTSection(start.fOffset, + String(name), argument, text)); } @@ -359,7 +322,7 @@ std::unique_ptr<ASTDeclaration> Parser::section() { std::unique_ptr<ASTDeclaration> Parser::declaration() { Modifiers modifiers = this->modifiers(); Token lookahead = this->peek(); - if (lookahead.fKind == Token::IDENTIFIER && !this->isType(lookahead.fText)) { + if (lookahead.fKind == Token::IDENTIFIER && !this->isType(this->text(lookahead))) { // we have an identifier that's not a type, could be the start of an interface block return this->interfaceBlock(modifiers); } @@ -403,14 +366,14 @@ std::unique_ptr<ASTDeclaration> Parser::declaration() { return nullptr; } } - return std::unique_ptr<ASTDeclaration>(new ASTFunction(name.fPosition, + return std::unique_ptr<ASTDeclaration>(new ASTFunction(name.fOffset, modifiers, std::move(type), - std::move(name.fText), + this->text(name), std::move(parameters), std::move(body))); } else { - return this->varDeclarationEnd(modifiers, std::move(type), std::move(name.fText)); + return this->varDeclarationEnd(modifiers, std::move(type), this->text(name)); } } @@ -425,7 +388,7 @@ std::unique_ptr<ASTVarDeclarations> Parser::varDeclarations() { if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { return nullptr; } - return this->varDeclarationEnd(modifiers, std::move(type), std::move(name.fText)); + return this->varDeclarationEnd(modifiers, std::move(type), this->text(name)); } /* STRUCT IDENTIFIER LBRACE varDeclaration* RBRACE */ @@ -450,7 +413,7 @@ std::unique_ptr<ASTType> Parser::structDeclaration() { auto type = (const Type*) fTypes[decl->fType->fName]; for (int i = (int) var.fSizes.size() - 1; i >= 0; i--) { if (!var.fSizes[i] || var.fSizes[i]->fKind != ASTExpression::kInt_Kind) { - this->error(decl->fPosition, "array size in struct field must be a constant"); + this->error(decl->fOffset, "array size in struct field must be a constant"); return nullptr; } uint64_t columns = ((ASTIntLiteral&) *var.fSizes[i]).fValue; @@ -460,15 +423,16 @@ std::unique_ptr<ASTType> Parser::structDeclaration() { } fields.push_back(Type::Field(decl->fModifiers, var.fName, type)); if (var.fValue) { - this->error(decl->fPosition, "initializers are not permitted on struct fields"); + this->error(decl->fOffset, "initializers are not permitted on struct fields"); } } } if (!this->expect(Token::RBRACE, "'}'")) { return nullptr; } - fTypes.add(name.fText, std::unique_ptr<Type>(new Type(name.fPosition, name.fText, fields))); - return std::unique_ptr<ASTType>(new ASTType(name.fPosition, name.fText, + fTypes.add(this->text(name), std::unique_ptr<Type>(new Type(name.fOffset, this->text(name), + fields))); + return std::unique_ptr<ASTType>(new ASTType(name.fOffset, this->text(name), ASTType::kStruct_Kind, std::vector<int>())); } @@ -482,11 +446,11 @@ std::unique_ptr<ASTVarDeclarations> Parser::structVarDeclaration(Modifiers modif if (this->checkNext(Token::IDENTIFIER, &name)) { std::unique_ptr<ASTVarDeclarations> result = this->varDeclarationEnd(modifiers, std::move(type), - std::move(name.fText)); + this->text(name)); if (result) { for (const auto& var : result->fVars) { if (var.fValue) { - this->error(var.fValue->fPosition, + this->error(var.fValue->fOffset, "struct variables cannot be initialized"); } } @@ -501,7 +465,7 @@ std::unique_ptr<ASTVarDeclarations> Parser::structVarDeclaration(Modifiers modif (LBRACKET expression? RBRACKET)* (EQ assignmentExpression)?)* SEMICOLON */ std::unique_ptr<ASTVarDeclarations> Parser::varDeclarationEnd(Modifiers mods, std::unique_ptr<ASTType> type, - String name) { + StringFragment name) { std::vector<ASTVarDeclaration> vars; std::vector<std::unique_ptr<ASTExpression>> currentVarSizes; while (this->checkNext(Token::LBRACKET)) { @@ -525,7 +489,7 @@ std::unique_ptr<ASTVarDeclarations> Parser::varDeclarationEnd(Modifiers mods, return nullptr; } } - vars.emplace_back(std::move(name), std::move(currentVarSizes), std::move(value)); + vars.emplace_back(name, std::move(currentVarSizes), std::move(value)); while (this->checkNext(Token::COMMA)) { Token name; if (!this->expect(Token::IDENTIFIER, "an identifier", &name)) { @@ -553,7 +517,7 @@ std::unique_ptr<ASTVarDeclarations> Parser::varDeclarationEnd(Modifiers mods, return nullptr; } } - vars.emplace_back(std::move(name.fText), std::move(currentVarSizes), std::move(value)); + vars.emplace_back(this->text(name), std::move(currentVarSizes), std::move(value)); } if (!this->expect(Token::SEMICOLON, "';'")) { return nullptr; @@ -580,14 +544,13 @@ std::unique_ptr<ASTParameter> Parser::parameter() { if (!this->expect(Token::INT_LITERAL, "a positive integer", &sizeToken)) { return nullptr; } - sizes.push_back(SkSL::stoi(sizeToken.fText)); + sizes.push_back(SkSL::stoi(this->text(sizeToken))); if (!this->expect(Token::RBRACKET, "']'")) { return nullptr; } } - return std::unique_ptr<ASTParameter>(new ASTParameter(name.fPosition, modifiers, - std::move(type), name.fText, - std::move(sizes))); + return std::unique_ptr<ASTParameter>(new ASTParameter(name.fOffset, modifiers, std::move(type), + this->text(name), std::move(sizes))); } /** (EQ INT_LITERAL)? */ @@ -597,7 +560,7 @@ int Parser::layoutInt() { } Token resultToken; if (this->expect(Token::INT_LITERAL, "a non-negative integer", &resultToken)) { - return SkSL::stoi(resultToken.fText); + return SkSL::stoi(this->text(resultToken)); } return -1; } @@ -607,13 +570,13 @@ String Parser::layoutCode() { if (!this->expect(Token::EQ, "'='")) { return ""; } - Token start = this->nextRawToken(true); + Token start = this->nextRawToken(); this->pushback(start); String code; int level = 1; bool done = false; while (!done) { - Token next = this->nextRawToken(true); + Token next = this->nextRawToken(); switch (next.fKind) { case Token::LPAREN: ++level; @@ -627,7 +590,7 @@ String Parser::layoutCode() { } break; case Token::END_OF_FILE: - this->error(start.fPosition, "reached end of file while parsing layout"); + this->error(start, "reached end of file while parsing layout"); return nullptr; default: break; @@ -639,7 +602,7 @@ String Parser::layoutCode() { this->pushback(std::move(next)); } else { - code += next.fText; + code += this->text(next); } } return code; @@ -651,10 +614,10 @@ Layout::Key Parser::layoutKey() { this->expect(Token::EQ, "'='"); Token key; if (this->expect(Token::IDENTIFIER, "an identifer", &key)) { - if (key.fText == "identity") { + if (this->text(key) == "identity") { return Layout::kIdentity_Key; } else { - this->error(key.fPosition, "unsupported layout key"); + this->error(key, "unsupported layout key"); } } } @@ -688,84 +651,84 @@ Layout Parser::layout() { } for (;;) { Token t = this->nextToken(); - YY_BUFFER_STATE buffer; - buffer = layout_scan_string(t.fText.c_str(), fLayoutScanner); - int token = layoutlex(fLayoutScanner); - layout_delete_buffer(buffer, fLayoutScanner); - if (token != Token::INVALID_TOKEN) { + String text = this->text(t); + fLayoutLexer.start(text.c_str(), text.size()); + int token = fLayoutLexer.next().fKind; + if (token != LayoutToken::INVALID) { switch (token) { - case Token::LOCATION: + case LayoutToken::LOCATION: location = this->layoutInt(); break; - case Token::OFFSET: + case LayoutToken::OFFSET: offset = this->layoutInt(); break; - case Token::BINDING: + case LayoutToken::BINDING: binding = this->layoutInt(); break; - case Token::INDEX: + case LayoutToken::INDEX: index = this->layoutInt(); break; - case Token::SET: + case LayoutToken::SET: set = this->layoutInt(); break; - case Token::BUILTIN: + case LayoutToken::BUILTIN: builtin = this->layoutInt(); break; - case Token::INPUT_ATTACHMENT_INDEX: + case LayoutToken::INPUT_ATTACHMENT_INDEX: inputAttachmentIndex = this->layoutInt(); break; - case Token::ORIGIN_UPPER_LEFT: + case LayoutToken::ORIGIN_UPPER_LEFT: originUpperLeft = true; break; - case Token::OVERRIDE_COVERAGE: + case LayoutToken::OVERRIDE_COVERAGE: overrideCoverage = true; break; - case Token::BLEND_SUPPORT_ALL_EQUATIONS: + case LayoutToken::BLEND_SUPPORT_ALL_EQUATIONS: blendSupportAllEquations = true; break; - case Token::PUSH_CONSTANT: + case LayoutToken::PUSH_CONSTANT: pushConstant = true; break; - case Token::POINTS: + case LayoutToken::POINTS: primitive = Layout::kPoints_Primitive; break; - case Token::LINES: + case LayoutToken::LINES: primitive = Layout::kLines_Primitive; break; - case Token::LINE_STRIP: + case LayoutToken::LINE_STRIP: primitive = Layout::kLineStrip_Primitive; break; - case Token::LINES_ADJACENCY: + case LayoutToken::LINES_ADJACENCY: primitive = Layout::kLinesAdjacency_Primitive; break; - case Token::TRIANGLES: + case LayoutToken::TRIANGLES: primitive = Layout::kTriangles_Primitive; break; - case Token::TRIANGLE_STRIP: + case LayoutToken::TRIANGLE_STRIP: primitive = Layout::kTriangleStrip_Primitive; break; - case Token::TRIANGLES_ADJACENCY: + case LayoutToken::TRIANGLES_ADJACENCY: primitive = Layout::kTrianglesAdjacency_Primitive; break; - case Token::MAX_VERTICES: + case LayoutToken::MAX_VERTICES: maxVertices = this->layoutInt(); break; - case Token::INVOCATIONS: + case LayoutToken::INVOCATIONS: invocations = this->layoutInt(); break; - case Token::WHEN: + case LayoutToken::WHEN: when = this->layoutCode(); break; - case Token::KEY: + case LayoutToken::KEY: key = this->layoutKey(); break; + default: + ASSERT(false); } - } else if (Layout::ReadFormat(t.fText, &format)) { + } else if (Layout::ReadFormat(this->text(t), &format)) { // AST::ReadFormat stored the result in 'format'. } else { - this->error(t.fPosition, ("'" + t.fText + - "' is not a valid layout qualifier").c_str()); + this->error(t, ("'" + this->text(t) + "' is not a valid layout qualifier").c_str()); } if (this->checkNext(Token::RPAREN)) { break; @@ -899,7 +862,7 @@ std::unique_ptr<ASTStatement> Parser::statement() { return this->block(); case Token::SEMICOLON: this->nextToken(); - return std::unique_ptr<ASTStatement>(new ASTBlock(start.fPosition, + return std::unique_ptr<ASTStatement>(new ASTBlock(start.fOffset, std::vector<std::unique_ptr<ASTStatement>>())); case Token::CONST: // fall through case Token::HIGHP: // fall through @@ -912,7 +875,7 @@ std::unique_ptr<ASTStatement> Parser::statement() { return std::unique_ptr<ASTStatement>(new ASTVarDeclarationStatement(std::move(decl))); } case Token::IDENTIFIER: - if (this->isType(start.fText)) { + if (this->isType(this->text(start))) { auto decl = this->varDeclarations(); if (!decl) { return nullptr; @@ -932,8 +895,8 @@ std::unique_ptr<ASTType> Parser::type() { if (!this->expect(Token::IDENTIFIER, "a type", &type)) { return nullptr; } - if (!this->isType(type.fText)) { - this->error(type.fPosition, ("no type named '" + type.fText + "'").c_str()); + if (!this->isType(this->text(type))) { + this->error(type, ("no type named '" + this->text(type) + "'").c_str()); return nullptr; } std::vector<int> sizes; @@ -950,7 +913,7 @@ std::unique_ptr<ASTType> Parser::type() { } this->expect(Token::RBRACKET, "']'"); } - return std::unique_ptr<ASTType>(new ASTType(type.fPosition, std::move(type.fText), + return std::unique_ptr<ASTType>(new ASTType(type.fOffset, this->text(type), ASTType::kIdentifier_Kind, sizes)); } @@ -964,7 +927,7 @@ std::unique_ptr<ASTDeclaration> Parser::interfaceBlock(Modifiers mods) { // we only get into interfaceBlock if we found a top-level identifier which was not a type. // 99% of the time, the user was not actually intending to create an interface block, so // it's better to report it as an unknown type - this->error(name.fPosition, "no type named '" + name.fText + "'"); + this->error(name, "no type named '" + this->text(name) + "'"); return nullptr; } this->nextToken(); @@ -978,8 +941,9 @@ std::unique_ptr<ASTDeclaration> Parser::interfaceBlock(Modifiers mods) { } this->nextToken(); std::vector<std::unique_ptr<ASTExpression>> sizes; - Token instanceName; - if (this->checkNext(Token::IDENTIFIER, &instanceName)) { + StringFragment instanceName; + Token instanceNameToken; + if (this->checkNext(Token::IDENTIFIER, &instanceNameToken)) { while (this->checkNext(Token::LBRACKET)) { if (this->peek().fKind != Token::RBRACKET) { std::unique_ptr<ASTExpression> size = this->expression(); @@ -992,12 +956,13 @@ std::unique_ptr<ASTDeclaration> Parser::interfaceBlock(Modifiers mods) { } this->expect(Token::RBRACKET, "']'"); } + instanceName = this->text(instanceNameToken); } this->expect(Token::SEMICOLON, "';'"); - return std::unique_ptr<ASTDeclaration>(new ASTInterfaceBlock(name.fPosition, mods, - std::move(name.fText), + return std::unique_ptr<ASTDeclaration>(new ASTInterfaceBlock(name.fOffset, mods, + this->text(name), std::move(decls), - std::move(instanceName.fText), + instanceName, std::move(sizes))); } @@ -1029,7 +994,7 @@ std::unique_ptr<ASTIfStatement> Parser::ifStatement() { return nullptr; } } - return std::unique_ptr<ASTIfStatement>(new ASTIfStatement(start.fPosition, + return std::unique_ptr<ASTIfStatement>(new ASTIfStatement(start.fOffset, isStatic, std::move(test), std::move(ifTrue), @@ -1062,7 +1027,7 @@ std::unique_ptr<ASTDoStatement> Parser::doStatement() { if (!this->expect(Token::SEMICOLON, "';'")) { return nullptr; } - return std::unique_ptr<ASTDoStatement>(new ASTDoStatement(start.fPosition, + return std::unique_ptr<ASTDoStatement>(new ASTDoStatement(start.fOffset, std::move(statement), std::move(test))); } @@ -1087,7 +1052,7 @@ std::unique_ptr<ASTWhileStatement> Parser::whileStatement() { if (!statement) { return nullptr; } - return std::unique_ptr<ASTWhileStatement>(new ASTWhileStatement(start.fPosition, + return std::unique_ptr<ASTWhileStatement>(new ASTWhileStatement(start.fOffset, std::move(test), std::move(statement))); } @@ -1114,7 +1079,7 @@ std::unique_ptr<ASTSwitchCase> Parser::switchCase() { } statements.push_back(std::move(s)); } - return std::unique_ptr<ASTSwitchCase>(new ASTSwitchCase(start.fPosition, std::move(value), + return std::unique_ptr<ASTSwitchCase>(new ASTSwitchCase(start.fOffset, std::move(value), std::move(statements))); } @@ -1162,13 +1127,13 @@ std::unique_ptr<ASTStatement> Parser::switchStatement() { } statements.push_back(std::move(s)); } - cases.emplace_back(new ASTSwitchCase(defaultStart.fPosition, nullptr, + cases.emplace_back(new ASTSwitchCase(defaultStart.fOffset, nullptr, std::move(statements))); } if (!this->expect(Token::RBRACE, "'}'")) { return nullptr; } - return std::unique_ptr<ASTStatement>(new ASTSwitchStatement(start.fPosition, + return std::unique_ptr<ASTStatement>(new ASTSwitchStatement(start.fOffset, isStatic, std::move(value), std::move(cases))); @@ -1200,7 +1165,7 @@ std::unique_ptr<ASTForStatement> Parser::forStatement() { break; } case Token::IDENTIFIER: { - if (this->isType(nextToken.fText)) { + if (this->isType(this->text(nextToken))) { std::unique_ptr<ASTVarDeclarations> vd = this->varDeclarations(); if (!vd) { return nullptr; @@ -1237,7 +1202,7 @@ std::unique_ptr<ASTForStatement> Parser::forStatement() { if (!statement) { return nullptr; } - return std::unique_ptr<ASTForStatement>(new ASTForStatement(start.fPosition, + return std::unique_ptr<ASTForStatement>(new ASTForStatement(start.fOffset, std::move(initializer), std::move(test), std::move(next), std::move(statement))); @@ -1259,7 +1224,7 @@ std::unique_ptr<ASTReturnStatement> Parser::returnStatement() { if (!this->expect(Token::SEMICOLON, "';'")) { return nullptr; } - return std::unique_ptr<ASTReturnStatement>(new ASTReturnStatement(start.fPosition, + return std::unique_ptr<ASTReturnStatement>(new ASTReturnStatement(start.fOffset, std::move(expression))); } @@ -1272,7 +1237,7 @@ std::unique_ptr<ASTBreakStatement> Parser::breakStatement() { if (!this->expect(Token::SEMICOLON, "';'")) { return nullptr; } - return std::unique_ptr<ASTBreakStatement>(new ASTBreakStatement(start.fPosition)); + return std::unique_ptr<ASTBreakStatement>(new ASTBreakStatement(start.fOffset)); } /* CONTINUE SEMICOLON */ @@ -1284,7 +1249,7 @@ std::unique_ptr<ASTContinueStatement> Parser::continueStatement() { if (!this->expect(Token::SEMICOLON, "';'")) { return nullptr; } - return std::unique_ptr<ASTContinueStatement>(new ASTContinueStatement(start.fPosition)); + return std::unique_ptr<ASTContinueStatement>(new ASTContinueStatement(start.fOffset)); } /* DISCARD SEMICOLON */ @@ -1296,7 +1261,7 @@ std::unique_ptr<ASTDiscardStatement> Parser::discardStatement() { if (!this->expect(Token::SEMICOLON, "';'")) { return nullptr; } - return std::unique_ptr<ASTDiscardStatement>(new ASTDiscardStatement(start.fPosition)); + return std::unique_ptr<ASTDiscardStatement>(new ASTDiscardStatement(start.fOffset)); } /* LBRACE statement* RBRACE */ @@ -1314,10 +1279,10 @@ std::unique_ptr<ASTBlock> Parser::block() { switch (this->peek().fKind) { case Token::RBRACE: this->nextToken(); - return std::unique_ptr<ASTBlock>(new ASTBlock(start.fPosition, + return std::unique_ptr<ASTBlock>(new ASTBlock(start.fOffset, std::move(statements))); case Token::END_OF_FILE: - this->error(this->peek().fPosition, "expected '}', but found end of file"); + this->error(this->peek(), "expected '}', but found end of file"); return nullptr; default: { std::unique_ptr<ASTStatement> statement = this->statement(); @@ -1714,7 +1679,7 @@ std::unique_ptr<ASTSuffix> Parser::suffix() { switch (next.fKind) { case Token::LBRACKET: { if (this->checkNext(Token::RBRACKET)) { - return std::unique_ptr<ASTSuffix>(new ASTIndexSuffix(next.fPosition)); + return std::unique_ptr<ASTSuffix>(new ASTIndexSuffix(next.fOffset)); } std::unique_ptr<ASTExpression> e = this->expression(); if (!e) { @@ -1724,10 +1689,10 @@ std::unique_ptr<ASTSuffix> Parser::suffix() { return std::unique_ptr<ASTSuffix>(new ASTIndexSuffix(std::move(e))); } case Token::DOT: { - Position pos = this->peek().fPosition; - String text; + int offset = this->peek().fOffset; + StringFragment text; if (this->identifier(&text)) { - return std::unique_ptr<ASTSuffix>(new ASTFieldSuffix(pos, std::move(text))); + return std::unique_ptr<ASTSuffix>(new ASTFieldSuffix(offset, std::move(text))); } return nullptr; } @@ -1746,17 +1711,17 @@ std::unique_ptr<ASTSuffix> Parser::suffix() { } } this->expect(Token::RPAREN, "')' to complete function parameters"); - return std::unique_ptr<ASTSuffix>(new ASTCallSuffix(next.fPosition, + return std::unique_ptr<ASTSuffix>(new ASTCallSuffix(next.fOffset, std::move(parameters))); } case Token::PLUSPLUS: - return std::unique_ptr<ASTSuffix>(new ASTSuffix(next.fPosition, + return std::unique_ptr<ASTSuffix>(new ASTSuffix(next.fOffset, ASTSuffix::kPostIncrement_Kind)); case Token::MINUSMINUS: - return std::unique_ptr<ASTSuffix>(new ASTSuffix(next.fPosition, + return std::unique_ptr<ASTSuffix>(new ASTSuffix(next.fOffset, ASTSuffix::kPostDecrement_Kind)); default: { - this->error(next.fPosition, "expected expression suffix, but found '" + next.fText + + this->error(next, "expected expression suffix, but found '" + this->text(next) + "'\n"); return nullptr; } @@ -1769,23 +1734,23 @@ std::unique_ptr<ASTExpression> Parser::term() { Token t = this->peek(); switch (t.fKind) { case Token::IDENTIFIER: { - String text; + StringFragment text; if (this->identifier(&text)) { - result.reset(new ASTIdentifier(t.fPosition, std::move(text))); + result.reset(new ASTIdentifier(t.fOffset, std::move(text))); } break; } case Token::INT_LITERAL: { int64_t i; if (this->intLiteral(&i)) { - result.reset(new ASTIntLiteral(t.fPosition, i)); + result.reset(new ASTIntLiteral(t.fOffset, i)); } break; } case Token::FLOAT_LITERAL: { double f; if (this->floatLiteral(&f)) { - result.reset(new ASTFloatLiteral(t.fPosition, f)); + result.reset(new ASTFloatLiteral(t.fOffset, f)); } break; } @@ -1793,7 +1758,7 @@ std::unique_ptr<ASTExpression> Parser::term() { case Token::FALSE_LITERAL: { bool b; if (this->boolLiteral(&b)) { - result.reset(new ASTBoolLiteral(t.fPosition, b)); + result.reset(new ASTBoolLiteral(t.fOffset, b)); } break; } @@ -1807,7 +1772,7 @@ std::unique_ptr<ASTExpression> Parser::term() { } default: this->nextToken(); - this->error(t.fPosition, "expected expression, but found '" + t.fText + "'\n"); + this->error(t.fOffset, "expected expression, but found '" + this->text(t) + "'\n"); result = nullptr; } return result; @@ -1817,7 +1782,7 @@ std::unique_ptr<ASTExpression> Parser::term() { bool Parser::intLiteral(int64_t* dest) { Token t; if (this->expect(Token::INT_LITERAL, "integer literal", &t)) { - *dest = SkSL::stol(t.fText); + *dest = SkSL::stol(this->text(t)); return true; } return false; @@ -1827,7 +1792,7 @@ bool Parser::intLiteral(int64_t* dest) { bool Parser::floatLiteral(double* dest) { Token t; if (this->expect(Token::FLOAT_LITERAL, "float literal", &t)) { - *dest = SkSL::stod(t.fText); + *dest = SkSL::stod(this->text(t)); return true; } return false; @@ -1844,16 +1809,16 @@ bool Parser::boolLiteral(bool* dest) { *dest = false; return true; default: - this->error(t.fPosition, "expected 'true' or 'false', but found '" + t.fText + "'\n"); + this->error(t, "expected 'true' or 'false', but found '" + this->text(t) + "'\n"); return false; } } /* IDENTIFIER */ -bool Parser::identifier(String* dest) { +bool Parser::identifier(StringFragment* dest) { Token t; if (this->expect(Token::IDENTIFIER, "identifier", &t)) { - *dest = std::move(t.fText); + *dest = this->text(t); return true; } return false; |