Linter Demo

Errors: 2

Warnings: 31

File: /home/fstrocco/Dart/dart/benchmark/devcompiler/lib/src/codegen/ast_builder.dart

// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file // for details. All rights reserved. Use of this source code is governed by a // BSD-style license that can be found in the LICENSE file. library dev_compiler.src.codegen.ast_builder; import 'package:analyzer/src/generated/ast.dart'; import 'package:analyzer/src/generated/scanner.dart'; import 'package:analyzer/src/generated/utilities_dart.dart'; import 'package:logging/logging.dart' as logger; final _log = new logger.Logger('dev_compiler.ast_builder'); // Wrappers around constructors for the dart ast. The AstBuilder class // provides a higher-level interface, abstracting both from the lexical // details and some of helper classes. The RawAstBuilder class provides // a low-level wrapper class (below) abstracts from the lexical details // but otherwise faithfully mirrors the construction API. class AstBuilder { static SimpleIdentifier identifierFromString(String name) { return RawAstBuilder.identifierFromString(name); } static PrefixedIdentifier prefixedIdentifier(Identifier pre, Identifier id) { return RawAstBuilder.prefixedIdentifier(pre, id); } static TypeParameter typeParameter(Identifier name, [TypeName bound = null]) { return RawAstBuilder.typeParameter(name, bound); } static TypeParameterList typeParameterList(List<TypeParameter> params) { return RawAstBuilder.typeParameterList(params); } static TypeArgumentList typeArgumentList(List<TypeName> args) { return RawAstBuilder.typeArgumentList(args); } static ArgumentList argumentList(List<Expression> args) { return RawAstBuilder.argumentList(args); } static TypeName typeName(Identifier id, List<TypeName> args) { TypeArgumentList argList = null; if (args != null && args.length > 0) argList = typeArgumentList(args); return RawAstBuilder.typeName(id, argList); } static FunctionTypeAlias functionTypeAlias(TypeName ret, Identifier name, List<TypeParameter> tParams, List<FormalParameter> params) { TypeParameterList tps = (tParams.length == 0) ? null : typeParameterList(tParams); FormalParameterList fps = formalParameterList(params); return RawAstBuilder.functionTypeAlias(ret, name, tps, fps); } static BooleanLiteral booleanLiteral(bool b) { return RawAstBuilder.booleanLiteral(b); } static NullLiteral nullLiteral() { return RawAstBuilder.nullLiteral(); } static IntegerLiteral integerLiteral(int i) { return RawAstBuilder.integerLiteral(i); } static StringLiteral stringLiteral(String s) { return RawAstBuilder.simpleStringLiteral(s); } static StringLiteral multiLineStringLiteral(String s) { return RawAstBuilder.tripleQuotedStringLiteral(s); } static AsExpression asExpression(Expression exp, TypeName type) { return RawAstBuilder.asExpression(exp, type); } static IsExpression isExpression(Expression exp, TypeName type) { return RawAstBuilder.isExpression(exp, type); } static ParenthesizedExpression parenthesizedExpression(Expression exp) { return RawAstBuilder.parenthesizedExpression(exp); } static Expression parenthesize(Expression exp) { if (exp is Identifier || exp is ParenthesizedExpression || exp is FunctionExpressionInvocation || exp is MethodInvocation) return exp; return parenthesizedExpression(exp); } static TokenType getTokenType(String lexeme) { switch (lexeme) { case "&": return TokenType.AMPERSAND; case "&&": return TokenType.AMPERSAND_AMPERSAND; case "&=": return TokenType.AMPERSAND_EQ; case "@": return TokenType.AT; case "!": return TokenType.BANG; case "!=": return TokenType.BANG_EQ; case "|": return TokenType.BAR; case "||": return TokenType.BAR_BAR; case "|=": return TokenType.BAR_EQ; case ":": return TokenType.COLON; case ",": return TokenType.COMMA; case "^": return TokenType.CARET; case "^=": return TokenType.CARET_EQ; case "}": return TokenType.CLOSE_CURLY_BRACKET; case ")": return TokenType.CLOSE_PAREN; case "]": return TokenType.CLOSE_SQUARE_BRACKET; case "=": return TokenType.EQ; case "==": return TokenType.EQ_EQ; case "=>": return TokenType.FUNCTION; case ">": return TokenType.GT; case ">=": return TokenType.GT_EQ; case ">>": return TokenType.GT_GT; case ">>=": return TokenType.GT_GT_EQ; case "#": return TokenType.HASH; case "[]": return TokenType.INDEX; case "[]=": return TokenType.INDEX_EQ; case "is": return TokenType.IS; case "<": return TokenType.LT; case "<=": return TokenType.LT_EQ; case "<<": return TokenType.LT_LT; case "<<=": return TokenType.LT_LT_EQ; case "-": return TokenType.MINUS; case "-=": return TokenType.MINUS_EQ; case "--": return TokenType.MINUS_MINUS; case "{": return TokenType.OPEN_CURLY_BRACKET; case "(": return TokenType.OPEN_PAREN; case "[": return TokenType.OPEN_SQUARE_BRACKET; case "%": return TokenType.PERCENT; case "%=": return TokenType.PERCENT_EQ; case ".": return TokenType.PERIOD; case "..": return TokenType.PERIOD_PERIOD; case "+": return TokenType.PLUS; case "+=": return TokenType.PLUS_EQ; case "++": return TokenType.PLUS_PLUS; case "?": return TokenType.QUESTION; case ";": return TokenType.SEMICOLON; case "/": return TokenType.SLASH; case "/=": return TokenType.SLASH_EQ; case "*": return TokenType.STAR; case "*=": return TokenType.STAR_EQ; case "\${": return TokenType.STRING_INTERPOLATION_EXPRESSION; case "\$": return TokenType.STRING_INTERPOLATION_IDENTIFIER; case "~": return TokenType.TILDE; case "~/": return TokenType.TILDE_SLASH; case "~/=": return TokenType.TILDE_SLASH_EQ; case "`": return TokenType.BACKPING; case "\\": return TokenType.BACKSLASH; case "...": return TokenType.PERIOD_PERIOD_PERIOD; default: return null; } } static Token _binaryOperation(String oper) { var type = getTokenType(oper); assert(type != null); return new Token(type, 0); } static BinaryExpression binaryExpression( Expression l, String oper, Expression r) { Token token = _binaryOperation(oper); return RawAstBuilder.binaryExpression(l, token, r); } static ConditionalExpression conditionalExpression( Expression cond, Expression tExp, Expression fExp) { return RawAstBuilder.conditionalExpression(cond, tExp, fExp); } static Expression application(Expression function, List<Expression> es) { ArgumentList args = argumentList(es); return RawAstBuilder.functionExpressionInvocation(function, args); } static FormalParameterList formalParameterList(List<FormalParameter> params) { return RawAstBuilder.formalParameterList(params); } static Block block(List<Statement> statements) { return RawAstBuilder.block(statements); } static MethodDeclaration blockMethodDeclaration(TypeName rt, Identifier m, List<FormalParameter> params, List<Statement> statements, {bool isStatic: false}) { FormalParameterList fl = formalParameterList(params); Block b = block(statements); BlockFunctionBody body = RawAstBuilder.blockFunctionBody(b); return RawAstBuilder.methodDeclaration(rt, m, fl, body, isStatic: isStatic); } static FunctionDeclaration blockFunctionDeclaration(TypeName rt, Identifier f, List<FormalParameter> params, List<Statement> statements) { FunctionExpression fexp = blockFunction(params, statements); return RawAstBuilder.functionDeclaration(rt, f, fexp); } static FunctionExpression blockFunction( List<FormalParameter> params, List<Statement> statements) { FormalParameterList fl = formalParameterList(params); Block b = block(statements); BlockFunctionBody body = RawAstBuilder.blockFunctionBody(b); return RawAstBuilder.functionExpression(fl, body); } static FunctionExpression expressionFunction( List<FormalParameter> params, Expression body, [bool decl = false]) { FormalParameterList fl = formalParameterList(params); ExpressionFunctionBody b = RawAstBuilder.expressionFunctionBody(body, decl); return RawAstBuilder.functionExpression(fl, b); } static FunctionDeclarationStatement functionDeclarationStatement( TypeName rType, Identifier name, FunctionExpression fe) { var fd = RawAstBuilder.functionDeclaration(rType, name, fe); return RawAstBuilder.functionDeclarationStatement(fd); } static Statement returnExpression([Expression e]) { return RawAstBuilder.returnExpression(e); } // let b = e1 in e2 == (\b.e2)(e1) static Expression letExpression( FormalParameter b, Expression e1, Expression e2) { FunctionExpression l = expressionFunction(<FormalParameter>[b], e2); return application(parenthesize(l), <Expression>[e1]); } static SimpleFormalParameter simpleFormal(Identifier v, TypeName t) { return RawAstBuilder.simpleFormalParameter(v, t); } static FunctionTypedFormalParameter functionTypedFormal( TypeName ret, Identifier v, List<FormalParameter> params) { FormalParameterList ps = formalParameterList(params); return RawAstBuilder.functionTypedFormalParameter(ret, v, ps); } static FormalParameter requiredFormal(NormalFormalParameter fp) { return RawAstBuilder.requiredFormalParameter(fp); } static FormalParameter optionalFormal(NormalFormalParameter fp) { return RawAstBuilder.optionalFormalParameter(fp); } static FormalParameter namedFormal(NormalFormalParameter fp) { return RawAstBuilder.namedFormalParameter(fp); } static NamedExpression namedParameter(String s, Expression e) { return namedExpression(s, e); } static NamedExpression namedExpression(String s, Expression e) { return RawAstBuilder.namedExpression(identifierFromString(s), e); } } // This class provides a low-level wrapper around the constructors for // the AST. It mostly simply abstracts from the lexical tokens. class RawAstBuilder { static SimpleIdentifier identifierFromString(String name) { StringToken token = new SyntheticStringToken(TokenType.IDENTIFIER, name, 0); return new SimpleIdentifier(token); } static PrefixedIdentifier prefixedIdentifier(Identifier pre, Identifier id) { Token period = new Token(TokenType.PERIOD, 0); return new PrefixedIdentifier(pre, period, id); } static TypeParameter typeParameter(Identifier name, [TypeName bound = null]) { Token keyword = (bound == null) ? null : new KeywordToken(Keyword.EXTENDS, 0); return new TypeParameter(null, null, name, keyword, bound); } static TypeParameterList typeParameterList(List<TypeParameter> params) { Token lb = new Token(TokenType.LT, 0); Token rb = new Token(TokenType.GT, 0); return new TypeParameterList(lb, params, rb); } static TypeArgumentList typeArgumentList(List<TypeName> args) { Token lb = new Token(TokenType.LT, 0); Token rb = new Token(TokenType.GT, 0); return new TypeArgumentList(lb, args, rb); } static ArgumentList argumentList(List<Expression> args) { Token lp = new BeginToken(TokenType.OPEN_PAREN, 0); Token rp = new Token(TokenType.CLOSE_PAREN, 0); return new ArgumentList(lp, args, rp); } static TypeName typeName(Identifier id, TypeArgumentList l) { return new TypeName(id, l); } static FunctionTypeAlias functionTypeAlias(TypeName ret, Identifier name, TypeParameterList tps, FormalParameterList fps) { Token semi = new Token(TokenType.SEMICOLON, 0); Token td = new KeywordToken(Keyword.TYPEDEF, 0); return new FunctionTypeAlias(null, null, td, ret, name, tps, fps, semi); } static BooleanLiteral booleanLiteral(bool b) { var k = new KeywordToken(b ? Keyword.TRUE : Keyword.FALSE, 0); return new BooleanLiteral(k, b); } static NullLiteral nullLiteral() { var n = new KeywordToken(Keyword.NULL, 0); return new NullLiteral(n); } static IntegerLiteral integerLiteral(int i) { StringToken token = new StringToken(TokenType.INT, '$i', 0); return new IntegerLiteral(token, i); } static SimpleStringLiteral simpleStringLiteral(String s) { StringToken token = new StringToken(TokenType.STRING, "\"" + s + "\"", 0); return new SimpleStringLiteral(token, s); } static SimpleStringLiteral tripleQuotedStringLiteral(String s) { StringToken token = new StringToken(TokenType.STRING, '"""' + s + '"""', 0); return new SimpleStringLiteral(token, s); } static AsExpression asExpression(Expression exp, TypeName type) { Token token = new KeywordToken(Keyword.AS, 0); return new AsExpression(exp, token, type); } static IsExpression isExpression(Expression exp, TypeName type) { Token token = new KeywordToken(Keyword.IS, 0); return new IsExpression(exp, token, null, type); } static ParenthesizedExpression parenthesizedExpression(Expression exp) { Token lp = new BeginToken(TokenType.OPEN_PAREN, exp.offset); Token rp = new Token(TokenType.CLOSE_PAREN, exp.end); return new ParenthesizedExpression(lp, exp, rp); } static BinaryExpression binaryExpression( Expression l, Token op, Expression r) { return new BinaryExpression(l, op, r); } static ConditionalExpression conditionalExpression( Expression cond, Expression tExp, Expression fExp) { var q = new Token(TokenType.QUESTION, 0); var c = new Token(TokenType.COLON, 0); return new ConditionalExpression(cond, q, tExp, c, fExp); } static Expression functionExpressionInvocation( Expression function, ArgumentList es) { return new FunctionExpressionInvocation(function, es); } static FormalParameterList formalParameterList(List<FormalParameter> params) { Token lp = new BeginToken(TokenType.OPEN_PAREN, 0); Token rp = new Token(TokenType.CLOSE_PAREN, 0); bool hasOptional = params.any((p) => p.kind == ParameterKind.POSITIONAL); bool hasNamed = params.any((p) => p.kind == ParameterKind.NAMED); assert(!(hasOptional && hasNamed)); Token ld = null; Token rd = null; if (hasOptional) { ld = new BeginToken(TokenType.OPEN_SQUARE_BRACKET, 0); rd = new Token(TokenType.CLOSE_SQUARE_BRACKET, 0); } if (hasNamed) { ld = new BeginToken(TokenType.OPEN_CURLY_BRACKET, 0); rd = new Token(TokenType.CLOSE_CURLY_BRACKET, 0); } return new FormalParameterList(lp, params, ld, rd, rp); } static Block block(List<Statement> statements) { Token ld = new BeginToken(TokenType.OPEN_CURLY_BRACKET, 0); Token rd = new Token(TokenType.CLOSE_CURLY_BRACKET, 0); return new Block(ld, statements, rd); } static BlockFunctionBody blockFunctionBody(Block b) { return new BlockFunctionBody(null, null, b); } static ExpressionFunctionBody expressionFunctionBody(Expression body, [bool decl = false]) { Token semi = (decl) ? new Token(TokenType.SEMICOLON, 0) : null; return new ExpressionFunctionBody(null, null, body, semi); } static FunctionDeclaration functionDeclaration( TypeName rt, Identifier f, FunctionExpression fexp) { return new FunctionDeclaration(null, null, null, rt, null, f, fexp); } static MethodDeclaration methodDeclaration( TypeName rt, Identifier m, FormalParameterList fl, FunctionBody body, {bool isStatic: false}) { Token st = isStatic ? new KeywordToken(Keyword.STATIC, 0) : null; return new MethodDeclaration( null, null, null, st, rt, null, null, m, fl, body); } static FunctionExpression functionExpression( FormalParameterList fl, FunctionBody body) { return new FunctionExpression(fl, body); } static FunctionDeclarationStatement functionDeclarationStatement( FunctionDeclaration fd) { return new FunctionDeclarationStatement(fd); } static Statement returnExpression([Expression e]) { Token ret = new KeywordToken(Keyword.RETURN, 0); Token semi = new Token(TokenType.SEMICOLON, 0); return new ReturnStatement(ret, e, semi); } static SimpleFormalParameter simpleFormalParameter(Identifier v, TypeName t) { return new SimpleFormalParameter(null, <Annotation>[], null, t, v); } static FunctionTypedFormalParameter functionTypedFormalParameter( TypeName ret, Identifier v, FormalParameterList ps) { return new FunctionTypedFormalParameter(null, <Annotation>[], ret, v, ps); } static FormalParameter requiredFormalParameter(NormalFormalParameter fp) { return fp; } static FormalParameter optionalFormalParameter(NormalFormalParameter fp) { return new DefaultFormalParameter(fp, ParameterKind.POSITIONAL, null, null); } static FormalParameter namedFormalParameter(NormalFormalParameter fp) { return new DefaultFormalParameter(fp, ParameterKind.NAMED, null, null); } static NamedExpression namedParameter(Identifier s, Expression e) { return namedExpression(s, e); } static NamedExpression namedExpression(Identifier s, Expression e) { Label l = new Label(s, new Token(TokenType.COLON, 0)); return new NamedExpression(l, e); } }