diff options
Diffstat (limited to 'vendor/github.com/robertkrimen/otto/parser/statement.go')
-rw-r--r-- | vendor/github.com/robertkrimen/otto/parser/statement.go | 938 |
1 files changed, 938 insertions, 0 deletions
diff --git a/vendor/github.com/robertkrimen/otto/parser/statement.go b/vendor/github.com/robertkrimen/otto/parser/statement.go new file mode 100644 index 000000000..6ff19d975 --- /dev/null +++ b/vendor/github.com/robertkrimen/otto/parser/statement.go @@ -0,0 +1,938 @@ +package parser + +import ( + "github.com/robertkrimen/otto/ast" + "github.com/robertkrimen/otto/token" +) + +func (self *_parser) parseBlockStatement() *ast.BlockStatement { + node := &ast.BlockStatement{} + + // Find comments before the leading brace + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(node, self.comments.FetchAll(), ast.LEADING) + self.comments.Unset() + } + + node.LeftBrace = self.expect(token.LEFT_BRACE) + node.List = self.parseStatementList() + + if self.mode&StoreComments != 0 { + self.comments.Unset() + self.comments.CommentMap.AddComments(node, self.comments.FetchAll(), ast.FINAL) + self.comments.AfterBlock() + } + + node.RightBrace = self.expect(token.RIGHT_BRACE) + + // Find comments after the trailing brace + if self.mode&StoreComments != 0 { + self.comments.ResetLineBreak() + self.comments.CommentMap.AddComments(node, self.comments.Fetch(), ast.TRAILING) + } + + return node +} + +func (self *_parser) parseEmptyStatement() ast.Statement { + idx := self.expect(token.SEMICOLON) + return &ast.EmptyStatement{Semicolon: idx} +} + +func (self *_parser) parseStatementList() (list []ast.Statement) { + for self.token != token.RIGHT_BRACE && self.token != token.EOF { + statement := self.parseStatement() + list = append(list, statement) + } + + return +} + +func (self *_parser) parseStatement() ast.Statement { + + if self.token == token.EOF { + self.errorUnexpectedToken(self.token) + return &ast.BadStatement{From: self.idx, To: self.idx + 1} + } + + if self.mode&StoreComments != 0 { + self.comments.ResetLineBreak() + } + + switch self.token { + case token.SEMICOLON: + return self.parseEmptyStatement() + case token.LEFT_BRACE: + return self.parseBlockStatement() + case token.IF: + return self.parseIfStatement() + case token.DO: + statement := self.parseDoWhileStatement() + self.comments.PostProcessNode(statement) + return statement + case token.WHILE: + return self.parseWhileStatement() + case token.FOR: + return self.parseForOrForInStatement() + case token.BREAK: + return self.parseBreakStatement() + case token.CONTINUE: + return self.parseContinueStatement() + case token.DEBUGGER: + return self.parseDebuggerStatement() + case token.WITH: + return self.parseWithStatement() + case token.VAR: + return self.parseVariableStatement() + case token.FUNCTION: + return self.parseFunctionStatement() + case token.SWITCH: + return self.parseSwitchStatement() + case token.RETURN: + return self.parseReturnStatement() + case token.THROW: + return self.parseThrowStatement() + case token.TRY: + return self.parseTryStatement() + } + + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + } + + expression := self.parseExpression() + + if identifier, isIdentifier := expression.(*ast.Identifier); isIdentifier && self.token == token.COLON { + // LabelledStatement + colon := self.idx + if self.mode&StoreComments != 0 { + self.comments.Unset() + } + self.next() // : + + label := identifier.Name + for _, value := range self.scope.labels { + if label == value { + self.error(identifier.Idx0(), "Label '%s' already exists", label) + } + } + var labelComments []*ast.Comment + if self.mode&StoreComments != 0 { + labelComments = self.comments.FetchAll() + } + self.scope.labels = append(self.scope.labels, label) // Push the label + statement := self.parseStatement() + self.scope.labels = self.scope.labels[:len(self.scope.labels)-1] // Pop the label + exp := &ast.LabelledStatement{ + Label: identifier, + Colon: colon, + Statement: statement, + } + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(exp, labelComments, ast.LEADING) + } + + return exp + } + + self.optionalSemicolon() + + statement := &ast.ExpressionStatement{ + Expression: expression, + } + + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(statement, comments, ast.LEADING) + } + return statement +} + +func (self *_parser) parseTryStatement() ast.Statement { + var tryComments []*ast.Comment + if self.mode&StoreComments != 0 { + tryComments = self.comments.FetchAll() + } + node := &ast.TryStatement{ + Try: self.expect(token.TRY), + Body: self.parseBlockStatement(), + } + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(node, tryComments, ast.LEADING) + self.comments.CommentMap.AddComments(node.Body, self.comments.FetchAll(), ast.TRAILING) + } + + if self.token == token.CATCH { + catch := self.idx + if self.mode&StoreComments != 0 { + self.comments.Unset() + } + self.next() + self.expect(token.LEFT_PARENTHESIS) + if self.token != token.IDENTIFIER { + self.expect(token.IDENTIFIER) + self.nextStatement() + return &ast.BadStatement{From: catch, To: self.idx} + } else { + identifier := self.parseIdentifier() + self.expect(token.RIGHT_PARENTHESIS) + node.Catch = &ast.CatchStatement{ + Catch: catch, + Parameter: identifier, + Body: self.parseBlockStatement(), + } + + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(node.Catch.Body, self.comments.FetchAll(), ast.TRAILING) + } + } + } + + if self.token == token.FINALLY { + if self.mode&StoreComments != 0 { + self.comments.Unset() + } + self.next() + if self.mode&StoreComments != 0 { + tryComments = self.comments.FetchAll() + } + + node.Finally = self.parseBlockStatement() + + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(node.Finally, tryComments, ast.LEADING) + } + } + + if node.Catch == nil && node.Finally == nil { + self.error(node.Try, "Missing catch or finally after try") + return &ast.BadStatement{From: node.Try, To: node.Body.Idx1()} + } + + return node +} + +func (self *_parser) parseFunctionParameterList() *ast.ParameterList { + opening := self.expect(token.LEFT_PARENTHESIS) + if self.mode&StoreComments != 0 { + self.comments.Unset() + } + var list []*ast.Identifier + for self.token != token.RIGHT_PARENTHESIS && self.token != token.EOF { + if self.token != token.IDENTIFIER { + self.expect(token.IDENTIFIER) + } else { + identifier := self.parseIdentifier() + list = append(list, identifier) + } + if self.token != token.RIGHT_PARENTHESIS { + if self.mode&StoreComments != 0 { + self.comments.Unset() + } + self.expect(token.COMMA) + } + } + closing := self.expect(token.RIGHT_PARENTHESIS) + + return &ast.ParameterList{ + Opening: opening, + List: list, + Closing: closing, + } +} + +func (self *_parser) parseParameterList() (list []string) { + for self.token != token.EOF { + if self.token != token.IDENTIFIER { + self.expect(token.IDENTIFIER) + } + list = append(list, self.literal) + self.next() + if self.token != token.EOF { + self.expect(token.COMMA) + } + } + return +} + +func (self *_parser) parseFunctionStatement() *ast.FunctionStatement { + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + } + function := &ast.FunctionStatement{ + Function: self.parseFunction(true), + } + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(function, comments, ast.LEADING) + } + + return function +} + +func (self *_parser) parseFunction(declaration bool) *ast.FunctionLiteral { + + node := &ast.FunctionLiteral{ + Function: self.expect(token.FUNCTION), + } + + var name *ast.Identifier + if self.token == token.IDENTIFIER { + name = self.parseIdentifier() + if declaration { + self.scope.declare(&ast.FunctionDeclaration{ + Function: node, + }) + } + } else if declaration { + // Use expect error handling + self.expect(token.IDENTIFIER) + } + if self.mode&StoreComments != 0 { + self.comments.Unset() + } + node.Name = name + node.ParameterList = self.parseFunctionParameterList() + self.parseFunctionBlock(node) + node.Source = self.slice(node.Idx0(), node.Idx1()) + + return node +} + +func (self *_parser) parseFunctionBlock(node *ast.FunctionLiteral) { + { + self.openScope() + inFunction := self.scope.inFunction + self.scope.inFunction = true + defer func() { + self.scope.inFunction = inFunction + self.closeScope() + }() + node.Body = self.parseBlockStatement() + node.DeclarationList = self.scope.declarationList + } +} + +func (self *_parser) parseDebuggerStatement() ast.Statement { + idx := self.expect(token.DEBUGGER) + + node := &ast.DebuggerStatement{ + Debugger: idx, + } + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(node, self.comments.FetchAll(), ast.TRAILING) + } + + self.semicolon() + return node +} + +func (self *_parser) parseReturnStatement() ast.Statement { + idx := self.expect(token.RETURN) + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + } + + if !self.scope.inFunction { + self.error(idx, "Illegal return statement") + self.nextStatement() + return &ast.BadStatement{From: idx, To: self.idx} + } + + node := &ast.ReturnStatement{ + Return: idx, + } + + if !self.implicitSemicolon && self.token != token.SEMICOLON && self.token != token.RIGHT_BRACE && self.token != token.EOF { + node.Argument = self.parseExpression() + } + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(node, comments, ast.LEADING) + } + + self.semicolon() + + return node +} + +func (self *_parser) parseThrowStatement() ast.Statement { + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + } + idx := self.expect(token.THROW) + + if self.implicitSemicolon { + if self.chr == -1 { // Hackish + self.error(idx, "Unexpected end of input") + } else { + self.error(idx, "Illegal newline after throw") + } + self.nextStatement() + return &ast.BadStatement{From: idx, To: self.idx} + } + + node := &ast.ThrowStatement{ + Argument: self.parseExpression(), + } + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(node, comments, ast.LEADING) + } + + self.semicolon() + + return node +} + +func (self *_parser) parseSwitchStatement() ast.Statement { + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + } + self.expect(token.SWITCH) + if self.mode&StoreComments != 0 { + comments = append(comments, self.comments.FetchAll()...) + } + self.expect(token.LEFT_PARENTHESIS) + node := &ast.SwitchStatement{ + Discriminant: self.parseExpression(), + Default: -1, + } + self.expect(token.RIGHT_PARENTHESIS) + if self.mode&StoreComments != 0 { + comments = append(comments, self.comments.FetchAll()...) + } + + self.expect(token.LEFT_BRACE) + + inSwitch := self.scope.inSwitch + self.scope.inSwitch = true + defer func() { + self.scope.inSwitch = inSwitch + }() + + for index := 0; self.token != token.EOF; index++ { + if self.token == token.RIGHT_BRACE { + self.next() + break + } + + clause := self.parseCaseStatement() + if clause.Test == nil { + if node.Default != -1 { + self.error(clause.Case, "Already saw a default in switch") + } + node.Default = index + } + node.Body = append(node.Body, clause) + } + + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(node, comments, ast.LEADING) + } + + return node +} + +func (self *_parser) parseWithStatement() ast.Statement { + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + } + self.expect(token.WITH) + var withComments []*ast.Comment + if self.mode&StoreComments != 0 { + withComments = self.comments.FetchAll() + } + + self.expect(token.LEFT_PARENTHESIS) + + node := &ast.WithStatement{ + Object: self.parseExpression(), + } + self.expect(token.RIGHT_PARENTHESIS) + + if self.mode&StoreComments != 0 { + //comments = append(comments, self.comments.FetchAll()...) + self.comments.CommentMap.AddComments(node, comments, ast.LEADING) + self.comments.CommentMap.AddComments(node, withComments, ast.WITH) + } + + node.Body = self.parseStatement() + + return node +} + +func (self *_parser) parseCaseStatement() *ast.CaseStatement { + node := &ast.CaseStatement{ + Case: self.idx, + } + + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + self.comments.Unset() + } + + if self.token == token.DEFAULT { + self.next() + } else { + self.expect(token.CASE) + node.Test = self.parseExpression() + } + + if self.mode&StoreComments != 0 { + self.comments.Unset() + } + self.expect(token.COLON) + + for { + if self.token == token.EOF || + self.token == token.RIGHT_BRACE || + self.token == token.CASE || + self.token == token.DEFAULT { + break + } + consequent := self.parseStatement() + node.Consequent = append(node.Consequent, consequent) + } + + // Link the comments to the case statement + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(node, comments, ast.LEADING) + } + + return node +} + +func (self *_parser) parseIterationStatement() ast.Statement { + inIteration := self.scope.inIteration + self.scope.inIteration = true + defer func() { + self.scope.inIteration = inIteration + }() + return self.parseStatement() +} + +func (self *_parser) parseForIn(into ast.Expression) *ast.ForInStatement { + + // Already have consumed "<into> in" + + source := self.parseExpression() + self.expect(token.RIGHT_PARENTHESIS) + body := self.parseIterationStatement() + + forin := &ast.ForInStatement{ + Into: into, + Source: source, + Body: body, + } + + return forin +} + +func (self *_parser) parseFor(initializer ast.Expression) *ast.ForStatement { + + // Already have consumed "<initializer> ;" + + var test, update ast.Expression + + if self.token != token.SEMICOLON { + test = self.parseExpression() + } + if self.mode&StoreComments != 0 { + self.comments.Unset() + } + self.expect(token.SEMICOLON) + + if self.token != token.RIGHT_PARENTHESIS { + update = self.parseExpression() + } + self.expect(token.RIGHT_PARENTHESIS) + body := self.parseIterationStatement() + + forstatement := &ast.ForStatement{ + Initializer: initializer, + Test: test, + Update: update, + Body: body, + } + + return forstatement +} + +func (self *_parser) parseForOrForInStatement() ast.Statement { + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + } + idx := self.expect(token.FOR) + var forComments []*ast.Comment + if self.mode&StoreComments != 0 { + forComments = self.comments.FetchAll() + } + self.expect(token.LEFT_PARENTHESIS) + + var left []ast.Expression + + forIn := false + if self.token != token.SEMICOLON { + + allowIn := self.scope.allowIn + self.scope.allowIn = false + if self.token == token.VAR { + var_ := self.idx + var varComments []*ast.Comment + if self.mode&StoreComments != 0 { + varComments = self.comments.FetchAll() + self.comments.Unset() + } + self.next() + list := self.parseVariableDeclarationList(var_) + if len(list) == 1 && self.token == token.IN { + if self.mode&StoreComments != 0 { + self.comments.Unset() + } + self.next() // in + forIn = true + left = []ast.Expression{list[0]} // There is only one declaration + } else { + left = list + } + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(left[0], varComments, ast.LEADING) + } + } else { + left = append(left, self.parseExpression()) + if self.token == token.IN { + self.next() + forIn = true + } + } + self.scope.allowIn = allowIn + } + + if forIn { + switch left[0].(type) { + case *ast.Identifier, *ast.DotExpression, *ast.BracketExpression, *ast.VariableExpression: + // These are all acceptable + default: + self.error(idx, "Invalid left-hand side in for-in") + self.nextStatement() + return &ast.BadStatement{From: idx, To: self.idx} + } + + forin := self.parseForIn(left[0]) + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(forin, comments, ast.LEADING) + self.comments.CommentMap.AddComments(forin, forComments, ast.FOR) + } + return forin + } + + if self.mode&StoreComments != 0 { + self.comments.Unset() + } + self.expect(token.SEMICOLON) + initializer := &ast.SequenceExpression{Sequence: left} + forstatement := self.parseFor(initializer) + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(forstatement, comments, ast.LEADING) + self.comments.CommentMap.AddComments(forstatement, forComments, ast.FOR) + } + return forstatement +} + +func (self *_parser) parseVariableStatement() *ast.VariableStatement { + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + } + idx := self.expect(token.VAR) + + list := self.parseVariableDeclarationList(idx) + + statement := &ast.VariableStatement{ + Var: idx, + List: list, + } + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(statement, comments, ast.LEADING) + self.comments.Unset() + } + self.semicolon() + + return statement +} + +func (self *_parser) parseDoWhileStatement() ast.Statement { + inIteration := self.scope.inIteration + self.scope.inIteration = true + defer func() { + self.scope.inIteration = inIteration + }() + + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + } + self.expect(token.DO) + var doComments []*ast.Comment + if self.mode&StoreComments != 0 { + doComments = self.comments.FetchAll() + } + + node := &ast.DoWhileStatement{} + if self.token == token.LEFT_BRACE { + node.Body = self.parseBlockStatement() + } else { + node.Body = self.parseStatement() + } + + self.expect(token.WHILE) + var whileComments []*ast.Comment + if self.mode&StoreComments != 0 { + whileComments = self.comments.FetchAll() + } + self.expect(token.LEFT_PARENTHESIS) + node.Test = self.parseExpression() + self.expect(token.RIGHT_PARENTHESIS) + + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(node, comments, ast.LEADING) + self.comments.CommentMap.AddComments(node, doComments, ast.DO) + self.comments.CommentMap.AddComments(node, whileComments, ast.WHILE) + } + + return node +} + +func (self *_parser) parseWhileStatement() ast.Statement { + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + } + self.expect(token.WHILE) + + var whileComments []*ast.Comment + if self.mode&StoreComments != 0 { + whileComments = self.comments.FetchAll() + } + + self.expect(token.LEFT_PARENTHESIS) + node := &ast.WhileStatement{ + Test: self.parseExpression(), + } + self.expect(token.RIGHT_PARENTHESIS) + node.Body = self.parseIterationStatement() + + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(node, comments, ast.LEADING) + self.comments.CommentMap.AddComments(node, whileComments, ast.WHILE) + } + + return node +} + +func (self *_parser) parseIfStatement() ast.Statement { + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + } + self.expect(token.IF) + var ifComments []*ast.Comment + if self.mode&StoreComments != 0 { + ifComments = self.comments.FetchAll() + } + + self.expect(token.LEFT_PARENTHESIS) + node := &ast.IfStatement{ + Test: self.parseExpression(), + } + self.expect(token.RIGHT_PARENTHESIS) + if self.token == token.LEFT_BRACE { + node.Consequent = self.parseBlockStatement() + } else { + node.Consequent = self.parseStatement() + } + + if self.token == token.ELSE { + self.next() + node.Alternate = self.parseStatement() + } + + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(node, comments, ast.LEADING) + self.comments.CommentMap.AddComments(node, ifComments, ast.IF) + } + + return node +} + +func (self *_parser) parseSourceElement() ast.Statement { + statement := self.parseStatement() + //self.comments.Unset() + return statement +} + +func (self *_parser) parseSourceElements() []ast.Statement { + body := []ast.Statement(nil) + + for { + if self.token != token.STRING { + break + } + body = append(body, self.parseSourceElement()) + } + + for self.token != token.EOF { + body = append(body, self.parseSourceElement()) + } + + return body +} + +func (self *_parser) parseProgram() *ast.Program { + self.openScope() + defer self.closeScope() + return &ast.Program{ + Body: self.parseSourceElements(), + DeclarationList: self.scope.declarationList, + File: self.file, + } +} + +func (self *_parser) parseBreakStatement() ast.Statement { + var comments []*ast.Comment + if self.mode&StoreComments != 0 { + comments = self.comments.FetchAll() + } + idx := self.expect(token.BREAK) + semicolon := self.implicitSemicolon + if self.token == token.SEMICOLON { + semicolon = true + self.next() + } + + if semicolon || self.token == token.RIGHT_BRACE { + self.implicitSemicolon = false + if !self.scope.inIteration && !self.scope.inSwitch { + goto illegal + } + breakStatement := &ast.BranchStatement{ + Idx: idx, + Token: token.BREAK, + } + + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(breakStatement, comments, ast.LEADING) + self.comments.CommentMap.AddComments(breakStatement, self.comments.FetchAll(), ast.TRAILING) + } + + return breakStatement + } + + if self.token == token.IDENTIFIER { + identifier := self.parseIdentifier() + if !self.scope.hasLabel(identifier.Name) { + self.error(idx, "Undefined label '%s'", identifier.Name) + return &ast.BadStatement{From: idx, To: identifier.Idx1()} + } + self.semicolon() + breakStatement := &ast.BranchStatement{ + Idx: idx, + Token: token.BREAK, + Label: identifier, + } + if self.mode&StoreComments != 0 { + self.comments.CommentMap.AddComments(breakStatement, comments, ast.LEADING) + } + + return breakStatement + } + + self.expect(token.IDENTIFIER) + +illegal: + self.error(idx, "Illegal break statement") + self.nextStatement() + return &ast.BadStatement{From: idx, To: self.idx} +} + +func (self *_parser) parseContinueStatement() ast.Statement { + idx := self.expect(token.CONTINUE) + semicolon := self.implicitSemicolon + if self.token == token.SEMICOLON { + semicolon = true + self.next() + } + + if semicolon || self.token == token.RIGHT_BRACE { + self.implicitSemicolon = false + if !self.scope.inIteration { + goto illegal + } + return &ast.BranchStatement{ + Idx: idx, + Token: token.CONTINUE, + } + } + + if self.token == token.IDENTIFIER { + identifier := self.parseIdentifier() + if !self.scope.hasLabel(identifier.Name) { + self.error(idx, "Undefined label '%s'", identifier.Name) + return &ast.BadStatement{From: idx, To: identifier.Idx1()} + } + if !self.scope.inIteration { + goto illegal + } + self.semicolon() + return &ast.BranchStatement{ + Idx: idx, + Token: token.CONTINUE, + Label: identifier, + } + } + + self.expect(token.IDENTIFIER) + +illegal: + self.error(idx, "Illegal continue statement") + self.nextStatement() + return &ast.BadStatement{From: idx, To: self.idx} +} + +// Find the next statement after an error (recover) +func (self *_parser) nextStatement() { + for { + switch self.token { + case token.BREAK, token.CONTINUE, + token.FOR, token.IF, token.RETURN, token.SWITCH, + token.VAR, token.DO, token.TRY, token.WITH, + token.WHILE, token.THROW, token.CATCH, token.FINALLY: + // Return only if parser made some progress since last + // sync or if it has not reached 10 next calls without + // progress. Otherwise consume at least one token to + // avoid an endless parser loop + if self.idx == self.recover.idx && self.recover.count < 10 { + self.recover.count++ + return + } + if self.idx > self.recover.idx { + self.recover.idx = self.idx + self.recover.count = 0 + return + } + // Reaching here indicates a parser bug, likely an + // incorrect token list in this function, but it only + // leads to skipping of possibly correct code if a + // previous error is present, and thus is preferred + // over a non-terminating parse. + case token.EOF: + return + } + self.next() + } +} |