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Diffstat (limited to 'module/language/ecmascript/parse.scm')
-rw-r--r-- | module/language/ecmascript/parse.scm | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/module/language/ecmascript/parse.scm b/module/language/ecmascript/parse.scm new file mode 100644 index 000000000..be41e4b9c --- /dev/null +++ b/module/language/ecmascript/parse.scm @@ -0,0 +1,352 @@ +;;; ECMAScript for Guile + +;; Copyright (C) 2009, 2010 Free Software Foundation, Inc. + +;;;; This library is free software; you can redistribute it and/or +;;;; modify it under the terms of the GNU Lesser General Public +;;;; License as published by the Free Software Foundation; either +;;;; version 3 of the License, or (at your option) any later version. +;;;; +;;;; This library is distributed in the hope that it will be useful, +;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +;;;; Lesser General Public License for more details. +;;;; +;;;; You should have received a copy of the GNU Lesser General Public +;;;; License along with this library; if not, write to the Free Software +;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + +;;; Code: + +(define-module (language ecmascript parse) + #:use-module (system base lalr) + #:use-module (language ecmascript tokenize) + #:export (read-ecmascript read-ecmascript/1 make-parser)) + +(define* (syntax-error message #:optional token) + (if (lexical-token? token) + (throw 'syntax-error #f message + (and=> (lexical-token-source token) + source-location->source-properties) + (or (lexical-token-value token) + (lexical-token-category token)) + #f) + (throw 'syntax-error #f message #f token #f))) + +(define (read-ecmascript port) + (let ((parse (make-parser))) + (parse (make-tokenizer port) syntax-error))) + +(define (read-ecmascript/1 port) + (let ((parse (make-parser))) + (parse (make-tokenizer/1 port) syntax-error))) + +(define *eof-object* + (call-with-input-string "" read-char)) + +(define (make-parser) + ;; Return a fresh ECMAScript parser. Parsers produced by `lalr-scm' are now + ;; stateful (e.g., they won't invoke the tokenizer any more once it has + ;; returned `*eoi*'), hence the need to instantiate new parsers. + + (lalr-parser + ;; terminal (i.e. input) token types + (lbrace rbrace lparen rparen lbracket rbracket dot semicolon comma < + > <= >= == != === !== + - * % ++ -- << >> >>> & bor ^ ! ~ && or ? + colon = += -= *= %= <<= >>= >>>= &= bor= ^= / /= + + break else new var case finally return void catch for switch while + continue function this with default if throw delete in try do + instanceof typeof null true false + + Identifier StringLiteral NumericLiteral RegexpLiteral) + + + (Program (SourceElements) : $1 + (*eoi*) : *eof-object*) + + ;; + ;; Verily, here we define statements. Expressions are defined + ;; afterwards. + ;; + + (SourceElement (Statement) : $1 + (FunctionDeclaration) : $1) + + (FunctionDeclaration (function Identifier lparen rparen lbrace FunctionBody rbrace) : `(var (,$2 (lambda () ,$6))) + (function Identifier lparen FormalParameterList rparen lbrace FunctionBody rbrace) : `(var (,$2 (lambda ,$4 ,$7)))) + (FunctionExpression (function lparen rparen lbrace FunctionBody rbrace) : `(lambda () ,$5) + (function Identifier lparen rparen lbrace FunctionBody rbrace) : `(lambda () ,$6) + (function lparen FormalParameterList rparen lbrace FunctionBody rbrace) : `(lambda ,$3 ,$6) + (function Identifier lparen FormalParameterList rparen lbrace FunctionBody rbrace) : `(lambda ,$4 ,$7)) + (FormalParameterList (Identifier) : `(,$1) + (FormalParameterList comma Identifier) : `(,@$1 ,$3)) + (SourceElements (SourceElement) : $1 + (SourceElements SourceElement) : (if (and (pair? $1) (eq? (car $1) 'begin)) + `(begin ,@(cdr $1) ,$2) + `(begin ,$1 ,$2))) + (FunctionBody (SourceElements) : $1 + () : '(begin)) + + (Statement (Block) : $1 + (VariableStatement) : $1 + (EmptyStatement) : $1 + (ExpressionStatement) : $1 + (IfStatement) : $1 + (IterationStatement) : $1 + (ContinueStatement) : $1 + (BreakStatement) : $1 + (ReturnStatement) : $1 + (WithStatement) : $1 + (LabelledStatement) : $1 + (SwitchStatement) : $1 + (ThrowStatement) : $1 + (TryStatement) : $1) + + (Block (lbrace StatementList rbrace) : `(block ,$2)) + (StatementList (Statement) : $1 + (StatementList Statement) : (if (and (pair? $1) (eq? (car $1) 'begin)) + `(begin ,@(cdr $1) ,$2) + `(begin ,$1 ,$2))) + + (VariableStatement (var VariableDeclarationList) : `(var ,@$2)) + (VariableDeclarationList (VariableDeclaration) : `(,$1) + (VariableDeclarationList comma VariableDeclaration) : `(,@$1 ,$2)) + (VariableDeclarationListNoIn (VariableDeclarationNoIn) : `(,$1) + (VariableDeclarationListNoIn comma VariableDeclarationNoIn) : `(,@$1 ,$2)) + (VariableDeclaration (Identifier) : `(,$1) + (Identifier Initialiser) : `(,$1 ,$2)) + (VariableDeclarationNoIn (Identifier) : `(,$1) + (Identifier Initialiser) : `(,$1 ,$2)) + (Initialiser (= AssignmentExpression) : $2) + (InitialiserNoIn (= AssignmentExpressionNoIn) : $2) + + (EmptyStatement (semicolon) : '(begin)) + + (ExpressionStatement (Expression semicolon) : $1) + + (IfStatement (if lparen Expression rparen Statement else Statement) : `(if ,$3 ,$5 ,$7) + (if lparen Expression rparen Statement) : `(if ,$3 ,$5)) + + (IterationStatement (do Statement while lparen Expression rparen semicolon) : `(do ,$2 ,$5) + + (while lparen Expression rparen Statement) : `(while ,$3 ,$5) + + (for lparen semicolon semicolon rparen Statement) : `(for #f #f #f ,$6) + (for lparen semicolon semicolon Expression rparen Statement) : `(for #f #f ,$5 ,$7) + (for lparen semicolon Expression semicolon rparen Statement) : `(for #f ,$4 #f ,$7) + (for lparen semicolon Expression semicolon Expression rparen Statement) : `(for #f ,$4 ,$6 ,$8) + + (for lparen ExpressionNoIn semicolon semicolon rparen Statement) : `(for ,$3 #f #f ,$7) + (for lparen ExpressionNoIn semicolon semicolon Expression rparen Statement) : `(for ,$3 #f ,$6 ,$8) + (for lparen ExpressionNoIn semicolon Expression semicolon rparen Statement) : `(for ,$3 ,$5 #f ,$8) + (for lparen ExpressionNoIn semicolon Expression semicolon Expression rparen Statement) : `(for ,$3 ,$5 ,$7 ,$9) + + (for lparen var VariableDeclarationListNoIn semicolon semicolon rparen Statement) : `(for (var ,@$4) #f #f ,$8) + (for lparen var VariableDeclarationListNoIn semicolon semicolon Expression rparen Statement) : `(for (var ,@$4) #f ,$7 ,$9) + (for lparen var VariableDeclarationListNoIn semicolon Expression semicolon rparen Statement) : `(for (var ,@$4) ,$6 #f ,$9) + (for lparen var VariableDeclarationListNoIn semicolon Expression semicolon Expression rparen Statement) : `(for (var ,@$4) ,$6 ,$8 ,$10) + + (for lparen LeftHandSideExpression in Expression rparen Statement) : `(for-in ,$3 ,$5 ,$7) + (for lparen var VariableDeclarationNoIn in Expression rparen Statement) : `(begin (var ,$4) (for-in (ref ,@$4) ,$6 ,$8))) + + (ContinueStatement (continue Identifier semicolon) : `(continue ,$2) + (continue semicolon) : `(continue)) + + (BreakStatement (break Identifier semicolon) : `(break ,$2) + (break semicolon) : `(break)) + + (ReturnStatement (return Expression semicolon) : `(return ,$2) + (return semicolon) : `(return)) + + (WithStatement (with lparen Expression rparen Statement) : `(with ,$3 ,$5)) + + (SwitchStatement (switch lparen Expression rparen CaseBlock) : `(switch ,$3 ,@$5)) + (CaseBlock (lbrace rbrace) : '() + (lbrace CaseClauses rbrace) : $2 + (lbrace CaseClauses DefaultClause rbrace) : `(,@$2 ,@$3) + (lbrace DefaultClause rbrace) : `(,$2) + (lbrace DefaultClause CaseClauses rbrace) : `(,@$2 ,@$3)) + (CaseClauses (CaseClause) : `(,$1) + (CaseClauses CaseClause) : `(,@$1 ,$2)) + (CaseClause (case Expression colon) : `(case ,$2) + (case Expression colon StatementList) : `(case ,$2 ,$4)) + (DefaultClause (default colon) : `(default) + (default colon StatementList) : `(default ,$3)) + + (LabelledStatement (Identifier colon Statement) : `(label ,$1 ,$3)) + + (ThrowStatement (throw Expression semicolon) : `(throw ,$2)) + + (TryStatement (try Block Catch) : `(try ,$2 ,$3 #f) + (try Block Finally) : `(try ,$2 #f ,$3) + (try Block Catch Finally) : `(try ,$2 ,$3 ,$4)) + (Catch (catch lparen Identifier rparen Block) : `(catch ,$3 ,$5)) + (Finally (finally Block) : `(finally ,$2)) + + ;; + ;; As promised, expressions. We build up to Expression bottom-up, so + ;; as to get operator precedence right. + ;; + + (PrimaryExpression (this) : 'this + (null) : 'null + (true) : 'true + (false) : 'false + (Identifier) : `(ref ,$1) + (StringLiteral) : `(string ,$1) + (RegexpLiteral) : `(regexp ,$1) + (NumericLiteral) : `(number ,$1) + (dot NumericLiteral) : `(number ,(string->number (string-append "." (number->string $2)))) + (ArrayLiteral) : $1 + (ObjectLiteral) : $1 + (lparen Expression rparen) : $2) + + (ArrayLiteral (lbracket rbracket) : '(array) + (lbracket Elision rbracket) : '(array ,@$2) + (lbracket ElementList rbracket) : `(array ,@$2) + (lbracket ElementList comma rbracket) : `(array ,@$2) + (lbracket ElementList comma Elision rbracket) : `(array ,@$2)) + (ElementList (AssignmentExpression) : `(,$1) + (Elision AssignmentExpression) : `(,@$1 ,$2) + (ElementList comma AssignmentExpression) : `(,@$1 ,$3) + (ElementList comma Elision AssignmentExpression) : `(,@$1 ,@$3 ,$4)) + (Elision (comma) : '((number 0)) + (Elision comma) : `(,@$1 (number 0))) + + (ObjectLiteral (lbrace rbrace) : `(object) + (lbrace PropertyNameAndValueList rbrace) : `(object ,@$2)) + (PropertyNameAndValueList (PropertyName colon AssignmentExpression) : `((,$1 ,$3)) + (PropertyNameAndValueList comma PropertyName colon AssignmentExpression) : `(,@$1 (,$3 ,$5))) + (PropertyName (Identifier) : $1 + (StringLiteral) : (string->symbol $1) + (NumericLiteral) : $1) + + (MemberExpression (PrimaryExpression) : $1 + (FunctionExpression) : $1 + (MemberExpression lbracket Expression rbracket) : `(aref ,$1 ,$3) + (MemberExpression dot Identifier) : `(pref ,$1 ,$3) + (new MemberExpression Arguments) : `(new ,$2 ,$3)) + + (NewExpression (MemberExpression) : $1 + (new NewExpression) : `(new ,$2 ())) + + (CallExpression (MemberExpression Arguments) : `(call ,$1 ,$2) + (CallExpression Arguments) : `(call ,$1 ,$2) + (CallExpression lbracket Expression rbracket) : `(aref ,$1 ,$3) + (CallExpression dot Identifier) : `(pref ,$1 ,$3)) + (Arguments (lparen rparen) : '() + (lparen ArgumentList rparen) : $2) + (ArgumentList (AssignmentExpression) : `(,$1) + (ArgumentList comma AssignmentExpression) : `(,@$1 ,$3)) + + (LeftHandSideExpression (NewExpression) : $1 + (CallExpression) : $1) + + (PostfixExpression (LeftHandSideExpression) : $1 + (LeftHandSideExpression ++) : `(postinc ,$1) + (LeftHandSideExpression --) : `(postdec ,$1)) + + (UnaryExpression (PostfixExpression) : $1 + (delete UnaryExpression) : `(delete ,$2) + (void UnaryExpression) : `(void ,$2) + (typeof UnaryExpression) : `(typeof ,$2) + (++ UnaryExpression) : `(preinc ,$2) + (-- UnaryExpression) : `(predec ,$2) + (+ UnaryExpression) : `(+ ,$2) + (- UnaryExpression) : `(- ,$2) + (~ UnaryExpression) : `(~ ,$2) + (! UnaryExpression) : `(! ,$2)) + + (MultiplicativeExpression (UnaryExpression) : $1 + (MultiplicativeExpression * UnaryExpression) : `(* ,$1 ,$3) + (MultiplicativeExpression / UnaryExpression) : `(/ ,$1 ,$3) + (MultiplicativeExpression % UnaryExpression) : `(% ,$1 ,$3)) + + (AdditiveExpression (MultiplicativeExpression) : $1 + (AdditiveExpression + MultiplicativeExpression) : `(+ ,$1 ,$3) + (AdditiveExpression - MultiplicativeExpression) : `(- ,$1 ,$3)) + + (ShiftExpression (AdditiveExpression) : $1 + (ShiftExpression << MultiplicativeExpression) : `(<< ,$1 ,$3) + (ShiftExpression >> MultiplicativeExpression) : `(>> ,$1 ,$3) + (ShiftExpression >>> MultiplicativeExpression) : `(>>> ,$1 ,$3)) + + (RelationalExpression (ShiftExpression) : $1 + (RelationalExpression < ShiftExpression) : `(< ,$1 ,$3) + (RelationalExpression > ShiftExpression) : `(> ,$1 ,$3) + (RelationalExpression <= ShiftExpression) : `(<= ,$1 ,$3) + (RelationalExpression >= ShiftExpression) : `(>= ,$1 ,$3) + (RelationalExpression instanceof ShiftExpression) : `(instanceof ,$1 ,$3) + (RelationalExpression in ShiftExpression) : `(in ,$1 ,$3)) + + (RelationalExpressionNoIn (ShiftExpression) : $1 + (RelationalExpressionNoIn < ShiftExpression) : `(< ,$1 ,$3) + (RelationalExpressionNoIn > ShiftExpression) : `(> ,$1 ,$3) + (RelationalExpressionNoIn <= ShiftExpression) : `(<= ,$1 ,$3) + (RelationalExpressionNoIn >= ShiftExpression) : `(>= ,$1 ,$3) + (RelationalExpressionNoIn instanceof ShiftExpression) : `(instanceof ,$1 ,$3)) + + (EqualityExpression (RelationalExpression) : $1 + (EqualityExpression == RelationalExpression) : `(== ,$1 ,$3) + (EqualityExpression != RelationalExpression) : `(!= ,$1 ,$3) + (EqualityExpression === RelationalExpression) : `(=== ,$1 ,$3) + (EqualityExpression !== RelationalExpression) : `(!== ,$1 ,$3)) + + (EqualityExpressionNoIn (RelationalExpressionNoIn) : $1 + (EqualityExpressionNoIn == RelationalExpressionNoIn) : `(== ,$1 ,$3) + (EqualityExpressionNoIn != RelationalExpressionNoIn) : `(!= ,$1 ,$3) + (EqualityExpressionNoIn === RelationalExpressionNoIn) : `(=== ,$1 ,$3) + (EqualityExpressionNoIn !== RelationalExpressionNoIn) : `(!== ,$1 ,$3)) + + (BitwiseANDExpression (EqualityExpression) : $1 + (BitwiseANDExpression & EqualityExpression) : `(& ,$1 ,$3)) + (BitwiseANDExpressionNoIn (EqualityExpressionNoIn) : $1 + (BitwiseANDExpressionNoIn & EqualityExpressionNoIn) : `(& ,$1 ,$3)) + + (BitwiseXORExpression (BitwiseANDExpression) : $1 + (BitwiseXORExpression ^ BitwiseANDExpression) : `(^ ,$1 ,$3)) + (BitwiseXORExpressionNoIn (BitwiseANDExpressionNoIn) : $1 + (BitwiseXORExpressionNoIn ^ BitwiseANDExpressionNoIn) : `(^ ,$1 ,$3)) + + (BitwiseORExpression (BitwiseXORExpression) : $1 + (BitwiseORExpression bor BitwiseXORExpression) : `(bor ,$1 ,$3)) + (BitwiseORExpressionNoIn (BitwiseXORExpressionNoIn) : $1 + (BitwiseORExpressionNoIn bor BitwiseXORExpressionNoIn) : `(bor ,$1 ,$3)) + + (LogicalANDExpression (BitwiseORExpression) : $1 + (LogicalANDExpression && BitwiseORExpression) : `(and ,$1 ,$3)) + (LogicalANDExpressionNoIn (BitwiseORExpressionNoIn) : $1 + (LogicalANDExpressionNoIn && BitwiseORExpressionNoIn) : `(and ,$1 ,$3)) + + (LogicalORExpression (LogicalANDExpression) : $1 + (LogicalORExpression or LogicalANDExpression) : `(or ,$1 ,$3)) + (LogicalORExpressionNoIn (LogicalANDExpressionNoIn) : $1 + (LogicalORExpressionNoIn or LogicalANDExpressionNoIn) : `(or ,$1 ,$3)) + + (ConditionalExpression (LogicalORExpression) : $1 + (LogicalORExpression ? AssignmentExpression colon AssignmentExpression) : `(if ,$1 ,$3 ,$5)) + (ConditionalExpressionNoIn (LogicalORExpressionNoIn) : $1 + (LogicalORExpressionNoIn ? AssignmentExpressionNoIn colon AssignmentExpressionNoIn) : `(if ,$1 ,$3 ,$5)) + + (AssignmentExpression (ConditionalExpression) : $1 + (LeftHandSideExpression AssignmentOperator AssignmentExpression) : `(,$2 ,$1 ,$3)) + (AssignmentExpressionNoIn (ConditionalExpressionNoIn) : $1 + (LeftHandSideExpression AssignmentOperator AssignmentExpressionNoIn) : `(,$2 ,$1 ,$3)) + (AssignmentOperator (=) : '= + (*=) : '*= + (/=) : '/= + (%=) : '%= + (+=) : '+= + (-=) : '-= + (<<=) : '<<= + (>>=) : '>>= + (>>>=) : '>>>= + (&=) : '&= + (^=) : '^= + (bor=) : 'bor=) + + (Expression (AssignmentExpression) : $1 + (Expression comma AssignmentExpression) : `(begin ,$1 ,$3)) + (ExpressionNoIn (AssignmentExpressionNoIn) : $1 + (ExpressionNoIn comma AssignmentExpressionNoIn) : `(begin ,$1 ,$3)))) |