--- a/ThirdParty/Jasy/jasy/js/parse/Parser.py Thu Jan 10 14:23:49 2019 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1448 +0,0 @@
-#
-# Jasy - Web Tooling Framework
-# Copyright 2010-2012 Zynga Inc.
-# Copyright 2013-2014 Sebastian Werner
-#
-
-#
-# License: MPL 1.1/GPL 2.0/LGPL 2.1
-# Authors:
-# - Brendan Eich <brendan@mozilla.org> (Original JavaScript) (2004-2010)
-# - Sebastian Werner <info@sebastian-werner.net> (Python Port) (2010-2012)
-#
-
-from __future__ import unicode_literals
-
-import jasy.js.tokenize.Tokenizer
-import jasy.js.parse.VanillaBuilder
-import jasy.js.tokenize.Lang
-
-__all__ = [ "parse", "parseExpression" ]
-
-def parseExpression(source, fileId=None, line=1, builder=None):
- if builder == None:
- builder = jasy.js.parse.VanillaBuilder.VanillaBuilder()
-
- # Convert source into expression statement to be friendly to the Tokenizer
- if not source.endswith(";"):
- source = source + ";"
-
- tokenizer = jasy.js.tokenize.Tokenizer.Tokenizer(source, fileId, line)
- staticContext = StaticContext(False, builder)
-
- return Expression(tokenizer, staticContext)
-
-
-
-def parse(source, fileId=None, line=1, builder=None):
- if builder == None:
- builder = jasy.js.parse.VanillaBuilder.VanillaBuilder()
-
- tokenizer = jasy.js.tokenize.Tokenizer.Tokenizer(source, fileId, line)
- staticContext = StaticContext(False, builder)
- node = Script(tokenizer, staticContext)
-
- # store fileId on top-level node
- node.fileId = tokenizer.fileId
-
- # add missing comments e.g. empty file with only a comment etc.
- # if there is something non-attached by an inner node it is attached to
- # the top level node, which is not correct, but might be better than
- # just ignoring the comment after all.
- if len(node) > 0:
- builder.COMMENTS_add(node[-1], None, tokenizer.getComments())
- else:
- builder.COMMENTS_add(node, None, tokenizer.getComments())
-
- if not tokenizer.done():
- raise SyntaxError("Unexpected end of file", tokenizer)
-
- return node
-
-
-
-class SyntaxError(Exception):
- def __init__(self, message, tokenizer):
- Exception.__init__(self, "Syntax error: %s\n%s:%s" % (message, tokenizer.fileId, tokenizer.line))
-
-
-# Used as a status container during tree-building for every def body and the global body
-class StaticContext(object):
- # inFunction is used to check if a return stm appears in a valid context.
- def __init__(self, inFunction, builder):
- # Whether this is inside a function, mostly True, only for top-level scope it's False
- self.inFunction = inFunction
-
- self.hasEmptyReturn = False
- self.hasReturnWithValue = False
- self.isGenerator = False
- self.blockId = 0
- self.builder = builder
- self.statementStack = []
-
- # Sets to store variable uses
- # self.functions = set()
- # self.variables = set()
-
- # Status
- # self.needsHoisting = False
- self.bracketLevel = 0
- self.curlyLevel = 0
- self.parenLevel = 0
- self.hookLevel = 0
-
- # Configure strict ecmascript 3 mode
- self.ecma3OnlyMode = False
-
- # Status flag during parsing
- self.inForLoopInit = False
-
-
-def Script(tokenizer, staticContext):
- """Parses the toplevel and def bodies."""
- node = Statements(tokenizer, staticContext)
-
- # change type from "block" to "script" for script root
- node.type = "script"
-
- # copy over data from compiler context
- # node.functions = staticContext.functions
- # node.variables = staticContext.variables
-
- return node
-
-
-def nest(tokenizer, staticContext, node, func, end=None):
- """Statement stack and nested statement handler."""
- staticContext.statementStack.append(node)
- node = func(tokenizer, staticContext)
- staticContext.statementStack.pop()
- end and tokenizer.mustMatch(end)
-
- return node
-
-
-def Statements(tokenizer, staticContext):
- """Parses a list of Statements."""
-
- builder = staticContext.builder
- node = builder.BLOCK_build(tokenizer, staticContext.blockId)
- staticContext.blockId += 1
-
- builder.BLOCK_hoistLets(node)
- staticContext.statementStack.append(node)
-
- prevNode = None
- while not tokenizer.done() and tokenizer.peek(True) != "right_curly":
- comments = tokenizer.getComments()
- childNode = Statement(tokenizer, staticContext)
- builder.COMMENTS_add(childNode, prevNode, comments)
- builder.BLOCK_addStatement(node, childNode)
- prevNode = childNode
-
- staticContext.statementStack.pop()
- builder.BLOCK_finish(node)
-
- # if getattr(node, "needsHoisting", False):
- # # TODO
- # raise Exception("Needs hoisting went true!!!")
- # builder.setHoists(node.id, node.variables)
- # # Propagate up to the function.
- # staticContext.needsHoisting = True
-
- return node
-
-
-def Block(tokenizer, staticContext):
- tokenizer.mustMatch("left_curly")
- node = Statements(tokenizer, staticContext)
- tokenizer.mustMatch("right_curly")
-
- return node
-
-
-def Statement(tokenizer, staticContext):
- """Parses a Statement."""
-
- tokenType = tokenizer.get(True)
- builder = staticContext.builder
-
- # Cases for statements ending in a right curly return early, avoiding the
- # common semicolon insertion magic after this switch.
-
- if tokenType == "function":
- # "declared_form" extends functions of staticContext, "statement_form" doesn'tokenizer.
- if len(staticContext.statementStack) > 1:
- kind = "statement_form"
- else:
- kind = "declared_form"
-
- return FunctionDefinition(tokenizer, staticContext, True, kind)
-
-
- elif tokenType == "left_curly":
- node = Statements(tokenizer, staticContext)
- tokenizer.mustMatch("right_curly")
-
- return node
-
-
- elif tokenType == "if":
- node = builder.IF_build(tokenizer)
- builder.IF_setCondition(node, ParenExpression(tokenizer, staticContext))
- staticContext.statementStack.append(node)
- builder.IF_setThenPart(node, Statement(tokenizer, staticContext))
-
- if tokenizer.match("else"):
- comments = tokenizer.getComments()
- elsePart = Statement(tokenizer, staticContext)
- builder.COMMENTS_add(elsePart, node, comments)
- builder.IF_setElsePart(node, elsePart)
-
- staticContext.statementStack.pop()
- builder.IF_finish(node)
-
- return node
-
-
- elif tokenType == "switch":
- # This allows CASEs after a "default", which is in the standard.
- node = builder.SWITCH_build(tokenizer)
- builder.SWITCH_setDiscriminant(node, ParenExpression(tokenizer, staticContext))
- staticContext.statementStack.append(node)
-
- tokenizer.mustMatch("left_curly")
- tokenType = tokenizer.get()
-
- while tokenType != "right_curly":
- if tokenType == "default":
- if node.defaultIndex >= 0:
- raise SyntaxError("More than one switch default", tokenizer)
-
- childNode = builder.DEFAULT_build(tokenizer)
- builder.SWITCH_setDefaultIndex(node, len(node)-1)
- tokenizer.mustMatch("colon")
- builder.DEFAULT_initializeStatements(childNode, tokenizer)
-
- while True:
- tokenType=tokenizer.peek(True)
- if tokenType == "case" or tokenType == "default" or tokenType == "right_curly":
- break
- builder.DEFAULT_addStatement(childNode, Statement(tokenizer, staticContext))
-
- builder.DEFAULT_finish(childNode)
-
- elif tokenType == "case":
- childNode = builder.CASE_build(tokenizer)
- builder.CASE_setLabel(childNode, Expression(tokenizer, staticContext))
- tokenizer.mustMatch("colon")
- builder.CASE_initializeStatements(childNode, tokenizer)
-
- while True:
- tokenType=tokenizer.peek(True)
- if tokenType == "case" or tokenType == "default" or tokenType == "right_curly":
- break
- builder.CASE_addStatement(childNode, Statement(tokenizer, staticContext))
-
- builder.CASE_finish(childNode)
-
- else:
- raise SyntaxError("Invalid switch case", tokenizer)
-
- builder.SWITCH_addCase(node, childNode)
- tokenType = tokenizer.get()
-
- staticContext.statementStack.pop()
- builder.SWITCH_finish(node)
-
- return node
-
-
- elif tokenType == "for":
- node = builder.FOR_build(tokenizer)
- forBlock = None
-
- if tokenizer.match("identifier") and tokenizer.token.value == "each":
- builder.FOR_rebuildForEach(node)
-
- tokenizer.mustMatch("left_paren")
- tokenType = tokenizer.peek()
- childNode = None
-
- if tokenType != "semicolon":
- staticContext.inForLoopInit = True
-
- if tokenType == "var" or tokenType == "const":
- tokenizer.get()
- childNode = Variables(tokenizer, staticContext)
-
- elif tokenType == "let":
- tokenizer.get()
-
- if tokenizer.peek() == "left_paren":
- childNode = LetBlock(tokenizer, staticContext, False)
-
- else:
- # Let in for head, we need to add an implicit block
- # around the rest of the for.
- forBlock = builder.BLOCK_build(tokenizer, staticContext.blockId)
- staticContext.blockId += 1
- staticContext.statementStack.append(forBlock)
- childNode = Variables(tokenizer, staticContext, forBlock)
-
- else:
- childNode = Expression(tokenizer, staticContext)
-
- staticContext.inForLoopInit = False
-
- if childNode and tokenizer.match("in"):
- builder.FOR_rebuildForIn(node)
- builder.FOR_setObject(node, Expression(tokenizer, staticContext), forBlock)
-
- if childNode.type == "var" or childNode.type == "let":
- if len(childNode) != 1:
- raise SyntaxError("Invalid for..in left-hand side", tokenizer)
-
- builder.FOR_setIterator(node, childNode, forBlock)
-
- else:
- builder.FOR_setIterator(node, childNode, forBlock)
-
- else:
- builder.FOR_setSetup(node, childNode)
- tokenizer.mustMatch("semicolon")
-
- if node.isEach:
- raise SyntaxError("Invalid for each..in loop", tokenizer)
-
- if tokenizer.peek() == "semicolon":
- builder.FOR_setCondition(node, None)
- else:
- builder.FOR_setCondition(node, Expression(tokenizer, staticContext))
-
- tokenizer.mustMatch("semicolon")
-
- if tokenizer.peek() == "right_paren":
- builder.FOR_setUpdate(node, None)
- else:
- builder.FOR_setUpdate(node, Expression(tokenizer, staticContext))
-
- tokenizer.mustMatch("right_paren")
- builder.FOR_setBody(node, nest(tokenizer, staticContext, node, Statement))
-
- if forBlock:
- builder.BLOCK_finish(forBlock)
- staticContext.statementStack.pop()
-
- builder.FOR_finish(node)
- return node
-
-
- elif tokenType == "while":
- node = builder.WHILE_build(tokenizer)
-
- builder.WHILE_setCondition(node, ParenExpression(tokenizer, staticContext))
- builder.WHILE_setBody(node, nest(tokenizer, staticContext, node, Statement))
- builder.WHILE_finish(node)
-
- return node
-
-
- elif tokenType == "do":
- node = builder.DO_build(tokenizer)
-
- builder.DO_setBody(node, nest(tokenizer, staticContext, node, Statement, "while"))
- builder.DO_setCondition(node, ParenExpression(tokenizer, staticContext))
- builder.DO_finish(node)
-
- if not staticContext.ecma3OnlyMode:
- # <script language="JavaScript"> (without version hints) may need
- # automatic semicolon insertion without a newline after do-while.
- # See http://bugzilla.mozilla.org/show_bug.cgi?id=238945.
- tokenizer.match("semicolon")
- return node
-
- # NO RETURN
-
-
- elif tokenType == "break" or tokenType == "continue":
- if tokenType == "break":
- node = builder.BREAK_build(tokenizer)
- else:
- node = builder.CONTINUE_build(tokenizer)
-
- if tokenizer.peekOnSameLine() == "identifier":
- tokenizer.get()
-
- if tokenType == "break":
- builder.BREAK_setLabel(node, tokenizer.token.value)
- else:
- builder.CONTINUE_setLabel(node, tokenizer.token.value)
-
- statementStack = staticContext.statementStack
- i = len(statementStack)
- label = node.label if hasattr(node, "label") else None
-
- if label:
- while True:
- i -= 1
- if i < 0:
- raise SyntaxError("Label not found", tokenizer)
- if getattr(statementStack[i], "label", None) == label:
- break
-
- #
- # Both break and continue to label need to be handled specially
- # within a labeled loop, so that they target that loop. If not in
- # a loop, then break targets its labeled statement. Labels can be
- # nested so we skip all labels immediately enclosing the nearest
- # non-label statement.
- #
- while i < len(statementStack) - 1 and statementStack[i+1].type == "label":
- i += 1
-
- if i < len(statementStack) - 1 and getattr(statementStack[i+1], "isLoop", False):
- i += 1
- elif tokenType == "continue":
- raise SyntaxError("Invalid continue", tokenizer)
-
- else:
- while True:
- i -= 1
- if i < 0:
- if tokenType == "break":
- raise SyntaxError("Invalid break", tokenizer)
- else:
- raise SyntaxError("Invalid continue", tokenizer)
-
- if getattr(statementStack[i], "isLoop", False) or (tokenType == "break" and statementStack[i].type == "switch"):
- break
-
- if tokenType == "break":
- builder.BREAK_finish(node)
- else:
- builder.CONTINUE_finish(node)
-
- # NO RETURN
-
-
- elif tokenType == "try":
- node = builder.TRY_build(tokenizer)
- builder.TRY_setTryBlock(node, Block(tokenizer, staticContext))
-
- while tokenizer.match("catch"):
- childNode = builder.CATCH_build(tokenizer)
- tokenizer.mustMatch("left_paren")
- nextTokenType = tokenizer.get()
-
- if nextTokenType == "left_bracket" or nextTokenType == "left_curly":
- # Destructured catch identifiers.
- tokenizer.unget()
- exception = DestructuringExpression(tokenizer, staticContext, True)
-
- elif nextTokenType == "identifier":
- exception = builder.CATCH_wrapException(tokenizer)
-
- else:
- raise SyntaxError("Missing identifier in catch", tokenizer)
-
- builder.CATCH_setException(childNode, exception)
-
- if tokenizer.match("if"):
- if staticContext.ecma3OnlyMode:
- raise SyntaxError("Illegal catch guard", tokenizer)
-
- if node.getChildrenLength() > 0 and not node.getUnrelatedChildren()[0].guard:
- raise SyntaxError("Guarded catch after unguarded", tokenizer)
-
- builder.CATCH_setGuard(childNode, Expression(tokenizer, staticContext))
-
- else:
- builder.CATCH_setGuard(childNode, None)
-
- tokenizer.mustMatch("right_paren")
-
- builder.CATCH_setBlock(childNode, Block(tokenizer, staticContext))
- builder.CATCH_finish(childNode)
-
- builder.TRY_addCatch(node, childNode)
-
- builder.TRY_finishCatches(node)
-
- if tokenizer.match("finally"):
- builder.TRY_setFinallyBlock(node, Block(tokenizer, staticContext))
-
- if node.getChildrenLength() == 0 and not hasattr(node, "finallyBlock"):
- raise SyntaxError("Invalid try statement", tokenizer)
-
- builder.TRY_finish(node)
- return node
-
-
- elif tokenType == "catch" or tokenType == "finally":
- raise SyntaxError(tokens[tokenType] + " without preceding try", tokenizer)
-
-
- elif tokenType == "throw":
- node = builder.THROW_build(tokenizer)
-
- builder.THROW_setException(node, Expression(tokenizer, staticContext))
- builder.THROW_finish(node)
-
- # NO RETURN
-
-
- elif tokenType == "return":
- node = returnOrYield(tokenizer, staticContext)
-
- # NO RETURN
-
-
- elif tokenType == "with":
- node = builder.WITH_build(tokenizer)
-
- builder.WITH_setObject(node, ParenExpression(tokenizer, staticContext))
- builder.WITH_setBody(node, nest(tokenizer, staticContext, node, Statement))
- builder.WITH_finish(node)
-
- return node
-
-
- elif tokenType == "var" or tokenType == "const":
- node = Variables(tokenizer, staticContext)
-
- # NO RETURN
-
-
- elif tokenType == "let":
- if tokenizer.peek() == "left_paren":
- node = LetBlock(tokenizer, staticContext, True)
- else:
- node = Variables(tokenizer, staticContext)
-
- # NO RETURN
-
-
- elif tokenType == "debugger":
- node = builder.DEBUGGER_build(tokenizer)
-
- # NO RETURN
-
-
- elif tokenType == "newline" or tokenType == "semicolon":
- node = builder.SEMICOLON_build(tokenizer)
-
- builder.SEMICOLON_setExpression(node, None)
- builder.SEMICOLON_finish(tokenizer)
-
- return node
-
-
- else:
- if tokenType == "identifier":
- tokenType = tokenizer.peek()
-
- # Labeled statement.
- if tokenType == "colon":
- label = tokenizer.token.value
- statementStack = staticContext.statementStack
-
- i = len(statementStack)-1
- while i >= 0:
- if getattr(statementStack[i], "label", None) == label:
- raise SyntaxError("Duplicate label", tokenizer)
-
- i -= 1
-
- tokenizer.get()
- node = builder.LABEL_build(tokenizer)
-
- builder.LABEL_setLabel(node, label)
- builder.LABEL_setStatement(node, nest(tokenizer, staticContext, node, Statement))
- builder.LABEL_finish(node)
-
- return node
-
- # Expression statement.
- # We unget the current token to parse the expression as a whole.
- node = builder.SEMICOLON_build(tokenizer)
- tokenizer.unget()
- builder.SEMICOLON_setExpression(node, Expression(tokenizer, staticContext))
- node.end = node.expression.end
- builder.SEMICOLON_finish(node)
-
- # NO RETURN
-
-
- MagicalSemicolon(tokenizer)
- return node
-
-
-
-def MagicalSemicolon(tokenizer):
- if tokenizer.line == tokenizer.token.line:
- tokenType = tokenizer.peekOnSameLine()
-
- if tokenType != "end" and tokenType != "newline" and tokenType != "semicolon" and tokenType != "right_curly":
- raise SyntaxError("Missing ; before statement", tokenizer)
-
- tokenizer.match("semicolon")
-
-
-
-def returnOrYield(tokenizer, staticContext):
- builder = staticContext.builder
- tokenType = tokenizer.token.type
-
- if tokenType == "return":
- if not staticContext.inFunction:
- raise SyntaxError("Return not in function", tokenizer)
-
- node = builder.RETURN_build(tokenizer)
-
- else:
- if not staticContext.inFunction:
- raise SyntaxError("Yield not in function", tokenizer)
-
- staticContext.isGenerator = True
- node = builder.YIELD_build(tokenizer)
-
- nextTokenType = tokenizer.peek(True)
- if nextTokenType != "end" and nextTokenType != "newline" and nextTokenType != "semicolon" and nextTokenType != "right_curly" and (tokenType != "yield" or (nextTokenType != tokenType and nextTokenType != "right_bracket" and nextTokenType != "right_paren" and nextTokenType != "colon" and nextTokenType != "comma")):
- if tokenType == "return":
- builder.RETURN_setValue(node, Expression(tokenizer, staticContext))
- staticContext.hasReturnWithValue = True
- else:
- builder.YIELD_setValue(node, AssignExpression(tokenizer, staticContext))
-
- elif tokenType == "return":
- staticContext.hasEmptyReturn = True
-
- # Disallow return v; in generator.
- if staticContext.hasReturnWithValue and staticContext.isGenerator:
- raise SyntaxError("Generator returns a value", tokenizer)
-
- if tokenType == "return":
- builder.RETURN_finish(node)
- else:
- builder.YIELD_finish(node)
-
- return node
-
-
-
-def FunctionDefinition(tokenizer, staticContext, requireName, functionForm):
- builder = staticContext.builder
- functionNode = builder.FUNCTION_build(tokenizer)
-
- if tokenizer.match("identifier"):
- builder.FUNCTION_setName(functionNode, tokenizer.token.value)
- elif requireName:
- raise SyntaxError("Missing def identifier", tokenizer)
-
- tokenizer.mustMatch("left_paren")
-
- if not tokenizer.match("right_paren"):
- builder.FUNCTION_initParams(functionNode, tokenizer)
- prevParamNode = None
- while True:
- tokenType = tokenizer.get()
- if tokenType == "left_bracket" or tokenType == "left_curly":
- # Destructured formal parameters.
- tokenizer.unget()
- paramNode = DestructuringExpression(tokenizer, staticContext)
-
- elif tokenType == "identifier":
- paramNode = builder.FUNCTION_wrapParam(tokenizer)
-
- else:
- raise SyntaxError("Missing formal parameter", tokenizer)
-
- builder.FUNCTION_addParam(functionNode, tokenizer, paramNode)
- builder.COMMENTS_add(paramNode, prevParamNode, tokenizer.getComments())
-
- if not tokenizer.match("comma"):
- break
-
- prevParamNode = paramNode
-
- tokenizer.mustMatch("right_paren")
-
- # Do we have an expression closure or a normal body?
- tokenType = tokenizer.get()
- if tokenType != "left_curly":
- builder.FUNCTION_setExpressionClosure(functionNode, True)
- tokenizer.unget()
-
- childContext = StaticContext(True, builder)
-
- if staticContext.inFunction:
- # Inner functions don't reset block numbering, only functions at
- # the top level of the program do.
- childContext.blockId = staticContext.blockId
-
- if tokenType != "left_curly":
- builder.FUNCTION_setBody(functionNode, AssignExpression(tokenizer, staticContext))
- if staticContext.isGenerator:
- raise SyntaxError("Generator returns a value", tokenizer)
-
- else:
- builder.FUNCTION_hoistVars(childContext.blockId)
- builder.FUNCTION_setBody(functionNode, Script(tokenizer, childContext))
-
- if tokenType == "left_curly":
- tokenizer.mustMatch("right_curly")
-
- functionNode.end = tokenizer.token.end
- functionNode.functionForm = functionForm
-
- builder.COMMENTS_add(functionNode.body, functionNode.body, tokenizer.getComments())
- builder.FUNCTION_finish(functionNode, staticContext)
-
- return functionNode
-
-
-
-def Variables(tokenizer, staticContext, letBlock=None):
- """Parses a comma-separated list of var declarations (and maybe initializations)."""
-
- builder = staticContext.builder
- if tokenizer.token.type == "var":
- build = builder.VAR_build
- addDecl = builder.VAR_addDecl
- finish = builder.VAR_finish
- childContext = staticContext
-
- elif tokenizer.token.type == "const":
- build = builder.CONST_build
- addDecl = builder.CONST_addDecl
- finish = builder.CONST_finish
- childContext = staticContext
-
- elif tokenizer.token.type == "let" or tokenizer.token.type == "left_paren":
- build = builder.LET_build
- addDecl = builder.LET_addDecl
- finish = builder.LET_finish
-
- if not letBlock:
- statementStack = staticContext.statementStack
- i = len(statementStack) - 1
-
- # a BLOCK *must* be found.
- while statementStack[i].type != "block":
- i -= 1
-
- # Lets at the def toplevel are just vars, at least in SpiderMonkey.
- if i == 0:
- build = builder.VAR_build
- addDecl = builder.VAR_addDecl
- finish = builder.VAR_finish
- childContext = staticContext
-
- else:
- childContext = statementStack[i]
-
- else:
- childContext = letBlock
-
- node = build(tokenizer)
-
- while True:
- tokenType = tokenizer.get()
-
- # Done in Python port!
- # FIXME Should have a special DECLARATION node instead of overloading
- # IDENTIFIER to mean both identifier declarations and destructured
- # declarations.
- childNode = builder.DECL_build(tokenizer)
-
- if tokenType == "left_bracket" or tokenType == "left_curly":
- # Pass in childContext if we need to add each pattern matched into
- # its variables, else pass in staticContext.
- # Need to unget to parse the full destructured expression.
- tokenizer.unget()
- builder.DECL_setNames(childNode, DestructuringExpression(tokenizer, staticContext, True, childContext))
-
- if staticContext.inForLoopInit and tokenizer.peek() == "in":
- addDecl(node, childNode, childContext)
- if tokenizer.match("comma"):
- continue
- else:
- break
-
- tokenizer.mustMatch("assign")
- if tokenizer.token.assignOp:
- raise SyntaxError("Invalid variable initialization", tokenizer)
-
- # Parse the init as a normal assignment.
- builder.DECL_setInitializer(childNode, AssignExpression(tokenizer, staticContext))
- builder.DECL_finish(childNode)
- addDecl(node, childNode, childContext)
-
- # Copy over names for variable list
- # for nameNode in childNode.names:
- # childContext.variables.add(nameNode.value)
-
- if tokenizer.match("comma"):
- continue
- else:
- break
-
- if tokenType != "identifier":
- raise SyntaxError("Missing variable name", tokenizer)
-
- builder.DECL_setName(childNode, tokenizer.token.value)
- builder.DECL_setReadOnly(childNode, node.type == "const")
- addDecl(node, childNode, childContext)
-
- if tokenizer.match("assign"):
- if tokenizer.token.assignOp:
- raise SyntaxError("Invalid variable initialization", tokenizer)
-
- initializerNode = AssignExpression(tokenizer, staticContext)
- builder.DECL_setInitializer(childNode, initializerNode)
-
- builder.DECL_finish(childNode)
-
- # If we directly use the node in "let" constructs
- # if not hasattr(childContext, "variables"):
- # childContext.variables = set()
-
- # childContext.variables.add(childNode.name)
-
- if not tokenizer.match("comma"):
- break
-
- finish(node)
- return node
-
-
-
-def LetBlock(tokenizer, staticContext, isStatement):
- """Does not handle let inside of for loop init."""
- builder = staticContext.builder
-
- # tokenizer.token.type must be "let"
- node = builder.LETBLOCK_build(tokenizer)
- tokenizer.mustMatch("left_paren")
- builder.LETBLOCK_setVariables(node, Variables(tokenizer, staticContext, node))
- tokenizer.mustMatch("right_paren")
-
- if isStatement and tokenizer.peek() != "left_curly":
- # If this is really an expression in let statement guise, then we
- # need to wrap the "let_block" node in a "semicolon" node so that we pop
- # the return value of the expression.
- childNode = builder.SEMICOLON_build(tokenizer)
- builder.SEMICOLON_setExpression(childNode, node)
- builder.SEMICOLON_finish(childNode)
- isStatement = False
-
- if isStatement:
- childNode = Block(tokenizer, staticContext)
- builder.LETBLOCK_setBlock(node, childNode)
-
- else:
- childNode = AssignExpression(tokenizer, staticContext)
- builder.LETBLOCK_setExpression(node, childNode)
-
- builder.LETBLOCK_finish(node)
- return node
-
-
-def checkDestructuring(tokenizer, staticContext, node, simpleNamesOnly=None, data=None):
- if node.type == "array_comp":
- raise SyntaxError("Invalid array comprehension left-hand side", tokenizer)
-
- if node.type != "array_init" and node.type != "object_init":
- return
-
- builder = staticContext.builder
-
- for child in node:
- if child == None:
- continue
-
- if child.type == "property_init":
- lhs = child[0]
- rhs = child[1]
- else:
- lhs = None
- rhs = None
-
-
- if rhs and (rhs.type == "array_init" or rhs.type == "object_init"):
- checkDestructuring(tokenizer, staticContext, rhs, simpleNamesOnly, data)
-
- if lhs and simpleNamesOnly:
- # In declarations, lhs must be simple names
- if lhs.type != "identifier":
- raise SyntaxError("Missing name in pattern", tokenizer)
-
- elif data:
- childNode = builder.DECL_build(tokenizer)
- builder.DECL_setName(childNode, lhs.value)
-
- # Don't need to set initializer because it's just for
- # hoisting anyways.
- builder.DECL_finish(childNode)
-
- # Each pattern needs to be added to variables.
- # data.variables.add(childNode.name)
-
-
-# JavaScript 1.7
-def DestructuringExpression(tokenizer, staticContext, simpleNamesOnly=None, data=None):
- node = PrimaryExpression(tokenizer, staticContext)
- checkDestructuring(tokenizer, staticContext, node, simpleNamesOnly, data)
-
- return node
-
-
-# JavsScript 1.7
-def GeneratorExpression(tokenizer, staticContext, expression):
- builder = staticContext.builder
- node = builder.GENERATOR_build(tokenizer)
-
- builder.GENERATOR_setExpression(node, expression)
- builder.GENERATOR_setTail(node, comprehensionTail(tokenizer, staticContext))
- builder.GENERATOR_finish(node)
-
- return node
-
-
-# JavaScript 1.7 Comprehensions Tails (Generators / Arrays)
-def comprehensionTail(tokenizer, staticContext):
- builder = staticContext.builder
-
- # tokenizer.token.type must be "for"
- body = builder.COMPTAIL_build(tokenizer)
-
- while True:
- node = builder.FOR_build(tokenizer)
-
- # Comprehension tails are always for..in loops.
- builder.FOR_rebuildForIn(node)
- if tokenizer.match("identifier"):
- # But sometimes they're for each..in.
- if tokenizer.token.value == "each":
- builder.FOR_rebuildForEach(node)
- else:
- tokenizer.unget()
-
- tokenizer.mustMatch("left_paren")
-
- tokenType = tokenizer.get()
- if tokenType == "left_bracket" or tokenType == "left_curly":
- tokenizer.unget()
- # Destructured left side of for in comprehension tails.
- builder.FOR_setIterator(node, DestructuringExpression(tokenizer, staticContext))
-
- elif tokenType == "identifier":
- # Removed variable/declaration substructure in Python port.
- # Variable declarations are not allowed here. So why process them in such a way?
-
- # declaration = builder.DECL_build(tokenizer)
- # builder.DECL_setName(declaration, tokenizer.token.value)
- # builder.DECL_finish(declaration)
- # childNode = builder.VAR_build(tokenizer)
- # builder.VAR_addDecl(childNode, declaration)
- # builder.VAR_finish(childNode)
- # builder.FOR_setIterator(node, declaration)
-
- # Don't add to variables since the semantics of comprehensions is
- # such that the variables are in their own def when desugared.
-
- identifier = builder.PRIMARY_build(tokenizer, "identifier")
- builder.FOR_setIterator(node, identifier)
-
- else:
- raise SyntaxError("Missing identifier", tokenizer)
-
- tokenizer.mustMatch("in")
- builder.FOR_setObject(node, Expression(tokenizer, staticContext))
- tokenizer.mustMatch("right_paren")
- builder.COMPTAIL_addFor(body, node)
-
- if not tokenizer.match("for"):
- break
-
- # Optional guard.
- if tokenizer.match("if"):
- builder.COMPTAIL_setGuard(body, ParenExpression(tokenizer, staticContext))
-
- builder.COMPTAIL_finish(body)
-
- return body
-
-
-def ParenExpression(tokenizer, staticContext):
- tokenizer.mustMatch("left_paren")
-
- # Always accept the 'in' operator in a parenthesized expression,
- # where it's unambiguous, even if we might be parsing the init of a
- # for statement.
- oldLoopInit = staticContext.inForLoopInit
- staticContext.inForLoopInit = False
- node = Expression(tokenizer, staticContext)
- staticContext.inForLoopInit = oldLoopInit
-
- err = "expression must be parenthesized"
- if tokenizer.match("for"):
- if node.type == "yield" and not node.parenthesized:
- raise SyntaxError("Yield " + err, tokenizer)
-
- if node.type == "comma" and not node.parenthesized:
- raise SyntaxError("Generator " + err, tokenizer)
-
- node = GeneratorExpression(tokenizer, staticContext, node)
-
- tokenizer.mustMatch("right_paren")
-
- return node
-
-
-def Expression(tokenizer, staticContext):
- """Top-down expression parser matched against SpiderMonkey."""
- builder = staticContext.builder
- node = AssignExpression(tokenizer, staticContext)
-
- if tokenizer.match("comma"):
- childNode = builder.COMMA_build(tokenizer)
- builder.COMMA_addOperand(childNode, node)
- node = childNode
- while True:
- childNode = node[len(node)-1]
- if childNode.type == "yield" and not childNode.parenthesized:
- raise SyntaxError("Yield expression must be parenthesized", tokenizer)
- builder.COMMA_addOperand(node, AssignExpression(tokenizer, staticContext))
-
- if not tokenizer.match("comma"):
- break
-
- builder.COMMA_finish(node)
-
- return node
-
-
-def AssignExpression(tokenizer, staticContext):
- builder = staticContext.builder
-
- # Have to treat yield like an operand because it could be the leftmost
- # operand of the expression.
- if tokenizer.match("yield", True):
- return returnOrYield(tokenizer, staticContext)
-
- comments = tokenizer.getComments()
- node = builder.ASSIGN_build(tokenizer)
- lhs = ConditionalExpression(tokenizer, staticContext)
- builder.COMMENTS_add(lhs, None, comments)
-
- if not tokenizer.match("assign"):
- builder.ASSIGN_finish(node)
- return lhs
-
- if lhs.type == "object_init" or lhs.type == "array_init":
- checkDestructuring(tokenizer, staticContext, lhs)
- elif lhs.type == "identifier" or lhs.type == "dot" or lhs.type == "index" or lhs.type == "call":
- pass
- else:
- raise SyntaxError("Bad left-hand side of assignment", tokenizer)
-
- builder.ASSIGN_setAssignOp(node, tokenizer.token.assignOp)
- builder.ASSIGN_addOperand(node, lhs)
- builder.ASSIGN_addOperand(node, AssignExpression(tokenizer, staticContext))
- builder.ASSIGN_finish(node)
-
- return node
-
-
-def ConditionalExpression(tokenizer, staticContext):
- builder = staticContext.builder
- node = OrExpression(tokenizer, staticContext)
-
- if tokenizer.match("hook"):
- childNode = node
- node = builder.HOOK_build(tokenizer)
- builder.HOOK_setCondition(node, childNode)
-
- # Always accept the 'in' operator in the middle clause of a ternary,
- # where it's unambiguous, even if we might be parsing the init of a
- # for statement.
- oldLoopInit = staticContext.inForLoopInit
- staticContext.inForLoopInit = False
- builder.HOOK_setThenPart(node, AssignExpression(tokenizer, staticContext))
- staticContext.inForLoopInit = oldLoopInit
-
- if not tokenizer.match("colon"):
- raise SyntaxError("Missing : after ?", tokenizer)
-
- builder.HOOK_setElsePart(node, AssignExpression(tokenizer, staticContext))
- builder.HOOK_finish(node)
-
- return node
-
-
-def OrExpression(tokenizer, staticContext):
- builder = staticContext.builder
- node = AndExpression(tokenizer, staticContext)
-
- while tokenizer.match("or"):
- childNode = builder.OR_build(tokenizer)
- builder.OR_addOperand(childNode, node)
- builder.OR_addOperand(childNode, AndExpression(tokenizer, staticContext))
- builder.OR_finish(childNode)
- node = childNode
-
- return node
-
-
-def AndExpression(tokenizer, staticContext):
- builder = staticContext.builder
- node = BitwiseOrExpression(tokenizer, staticContext)
-
- while tokenizer.match("and"):
- childNode = builder.AND_build(tokenizer)
- builder.AND_addOperand(childNode, node)
- builder.AND_addOperand(childNode, BitwiseOrExpression(tokenizer, staticContext))
- builder.AND_finish(childNode)
- node = childNode
-
- return node
-
-
-def BitwiseOrExpression(tokenizer, staticContext):
- builder = staticContext.builder
- node = BitwiseXorExpression(tokenizer, staticContext)
-
- while tokenizer.match("bitwise_or"):
- childNode = builder.BITWISEOR_build(tokenizer)
- builder.BITWISEOR_addOperand(childNode, node)
- builder.BITWISEOR_addOperand(childNode, BitwiseXorExpression(tokenizer, staticContext))
- builder.BITWISEOR_finish(childNode)
- node = childNode
-
- return node
-
-
-def BitwiseXorExpression(tokenizer, staticContext):
- builder = staticContext.builder
- node = BitwiseAndExpression(tokenizer, staticContext)
-
- while tokenizer.match("bitwise_xor"):
- childNode = builder.BITWISEXOR_build(tokenizer)
- builder.BITWISEXOR_addOperand(childNode, node)
- builder.BITWISEXOR_addOperand(childNode, BitwiseAndExpression(tokenizer, staticContext))
- builder.BITWISEXOR_finish(childNode)
- node = childNode
-
- return node
-
-
-def BitwiseAndExpression(tokenizer, staticContext):
- builder = staticContext.builder
- node = EqualityExpression(tokenizer, staticContext)
-
- while tokenizer.match("bitwise_and"):
- childNode = builder.BITWISEAND_build(tokenizer)
- builder.BITWISEAND_addOperand(childNode, node)
- builder.BITWISEAND_addOperand(childNode, EqualityExpression(tokenizer, staticContext))
- builder.BITWISEAND_finish(childNode)
- node = childNode
-
- return node
-
-
-def EqualityExpression(tokenizer, staticContext):
- builder = staticContext.builder
- node = RelationalExpression(tokenizer, staticContext)
-
- while tokenizer.match("eq") or tokenizer.match("ne") or tokenizer.match("strict_eq") or tokenizer.match("strict_ne"):
- childNode = builder.EQUALITY_build(tokenizer)
- builder.EQUALITY_addOperand(childNode, node)
- builder.EQUALITY_addOperand(childNode, RelationalExpression(tokenizer, staticContext))
- builder.EQUALITY_finish(childNode)
- node = childNode
-
- return node
-
-
-def RelationalExpression(tokenizer, staticContext):
- builder = staticContext.builder
- oldLoopInit = staticContext.inForLoopInit
-
- # Uses of the in operator in shiftExprs are always unambiguous,
- # so unset the flag that prohibits recognizing it.
- staticContext.inForLoopInit = False
- node = ShiftExpression(tokenizer, staticContext)
-
- while tokenizer.match("lt") or tokenizer.match("le") or tokenizer.match("ge") or tokenizer.match("gt") or (oldLoopInit == False and tokenizer.match("in")) or tokenizer.match("instanceof"):
- childNode = builder.RELATIONAL_build(tokenizer)
- builder.RELATIONAL_addOperand(childNode, node)
- builder.RELATIONAL_addOperand(childNode, ShiftExpression(tokenizer, staticContext))
- builder.RELATIONAL_finish(childNode)
- node = childNode
-
- staticContext.inForLoopInit = oldLoopInit
-
- return node
-
-
-def ShiftExpression(tokenizer, staticContext):
- builder = staticContext.builder
- node = AddExpression(tokenizer, staticContext)
-
- while tokenizer.match("lsh") or tokenizer.match("rsh") or tokenizer.match("ursh"):
- childNode = builder.SHIFT_build(tokenizer)
- builder.SHIFT_addOperand(childNode, node)
- builder.SHIFT_addOperand(childNode, AddExpression(tokenizer, staticContext))
- builder.SHIFT_finish(childNode)
- node = childNode
-
- return node
-
-
-def AddExpression(tokenizer, staticContext):
- builder = staticContext.builder
- node = MultiplyExpression(tokenizer, staticContext)
-
- while tokenizer.match("plus") or tokenizer.match("minus"):
- childNode = builder.ADD_build(tokenizer)
- builder.ADD_addOperand(childNode, node)
- builder.ADD_addOperand(childNode, MultiplyExpression(tokenizer, staticContext))
- builder.ADD_finish(childNode)
- node = childNode
-
- return node
-
-
-def MultiplyExpression(tokenizer, staticContext):
- builder = staticContext.builder
- node = UnaryExpression(tokenizer, staticContext)
-
- while tokenizer.match("mul") or tokenizer.match("div") or tokenizer.match("mod"):
- childNode = builder.MULTIPLY_build(tokenizer)
- builder.MULTIPLY_addOperand(childNode, node)
- builder.MULTIPLY_addOperand(childNode, UnaryExpression(tokenizer, staticContext))
- builder.MULTIPLY_finish(childNode)
- node = childNode
-
- return node
-
-
-def UnaryExpression(tokenizer, staticContext):
- builder = staticContext.builder
- tokenType = tokenizer.get(True)
-
- if tokenType in ["delete", "void", "typeof", "not", "bitwise_not", "plus", "minus"]:
- node = builder.UNARY_build(tokenizer)
- builder.UNARY_addOperand(node, UnaryExpression(tokenizer, staticContext))
-
- elif tokenType == "increment" or tokenType == "decrement":
- # Prefix increment/decrement.
- node = builder.UNARY_build(tokenizer)
- builder.UNARY_addOperand(node, MemberExpression(tokenizer, staticContext, True))
-
- else:
- tokenizer.unget()
- node = MemberExpression(tokenizer, staticContext, True)
-
- # Don't look across a newline boundary for a postfix {in,de}crement.
- if tokenizer.tokens[(tokenizer.tokenIndex + tokenizer.lookahead - 1) & 3].line == tokenizer.line:
- if tokenizer.match("increment") or tokenizer.match("decrement"):
- childNode = builder.UNARY_build(tokenizer)
- builder.UNARY_setPostfix(childNode)
- builder.UNARY_finish(node)
- builder.UNARY_addOperand(childNode, node)
- node = childNode
-
- builder.UNARY_finish(node)
- return node
-
-
-def MemberExpression(tokenizer, staticContext, allowCallSyntax):
- builder = staticContext.builder
-
- if tokenizer.match("new"):
- node = builder.MEMBER_build(tokenizer)
- builder.MEMBER_addOperand(node, MemberExpression(tokenizer, staticContext, False))
-
- if tokenizer.match("left_paren"):
- builder.MEMBER_rebuildNewWithArgs(node)
- builder.MEMBER_addOperand(node, ArgumentList(tokenizer, staticContext))
-
- builder.MEMBER_finish(node)
-
- else:
- node = PrimaryExpression(tokenizer, staticContext)
-
- while True:
- tokenType = tokenizer.get()
- if tokenType == "end":
- break
-
- if tokenType == "dot":
- childNode = builder.MEMBER_build(tokenizer)
- builder.MEMBER_addOperand(childNode, node)
- tokenizer.mustMatch("identifier")
- builder.MEMBER_addOperand(childNode, builder.MEMBER_build(tokenizer))
-
- elif tokenType == "left_bracket":
- childNode = builder.MEMBER_build(tokenizer, "index")
- builder.MEMBER_addOperand(childNode, node)
- builder.MEMBER_addOperand(childNode, Expression(tokenizer, staticContext))
- tokenizer.mustMatch("right_bracket")
-
- elif tokenType == "left_paren" and allowCallSyntax:
- childNode = builder.MEMBER_build(tokenizer, "call")
- builder.MEMBER_addOperand(childNode, node)
- builder.MEMBER_addOperand(childNode, ArgumentList(tokenizer, staticContext))
-
- else:
- tokenizer.unget()
- return node
-
- builder.MEMBER_finish(childNode)
- node = childNode
-
- return node
-
-
-def ArgumentList(tokenizer, staticContext):
- builder = staticContext.builder
- node = builder.LIST_build(tokenizer)
-
- if tokenizer.match("right_paren", True):
- return node
-
- while True:
- childNode = AssignExpression(tokenizer, staticContext)
- if childNode.type == "yield" and not childNode.parenthesized and tokenizer.peek() == "comma":
- raise SyntaxError("Yield expression must be parenthesized", tokenizer)
-
- if tokenizer.match("for"):
- childNode = GeneratorExpression(tokenizer, staticContext, childNode)
- if len(node) > 1 or tokenizer.peek(True) == "comma":
- raise SyntaxError("Generator expression must be parenthesized", tokenizer)
-
- builder.LIST_addOperand(node, childNode)
- if not tokenizer.match("comma"):
- break
-
- tokenizer.mustMatch("right_paren")
- builder.LIST_finish(node)
-
- return node
-
-
-def PrimaryExpression(tokenizer, staticContext):
- builder = staticContext.builder
- tokenType = tokenizer.get(True)
-
- if tokenType == "function":
- node = FunctionDefinition(tokenizer, staticContext, False, "expressed_form")
-
- elif tokenType == "left_bracket":
- node = builder.ARRAYINIT_build(tokenizer)
- while True:
- tokenType = tokenizer.peek(True)
- if tokenType == "right_bracket":
- break
-
- if tokenType == "comma":
- tokenizer.get()
- builder.ARRAYINIT_addElement(node, None)
- continue
-
- builder.ARRAYINIT_addElement(node, AssignExpression(tokenizer, staticContext))
-
- if tokenType != "comma" and not tokenizer.match("comma"):
- break
-
- # If we matched exactly one element and got a "for", we have an
- # array comprehension.
- if len(node) == 1 and tokenizer.match("for"):
- childNode = builder.ARRAYCOMP_build(tokenizer)
- builder.ARRAYCOMP_setExpression(childNode, node[0])
- builder.ARRAYCOMP_setTail(childNode, comprehensionTail(tokenizer, staticContext))
- node = childNode
-
- builder.COMMENTS_add(node, node, tokenizer.getComments())
- tokenizer.mustMatch("right_bracket")
- builder.PRIMARY_finish(node)
-
- elif tokenType == "left_curly":
- node = builder.OBJECTINIT_build(tokenizer)
-
- if not tokenizer.match("right_curly"):
- while True:
- tokenType = tokenizer.get()
- tokenValue = getattr(tokenizer.token, "value", None)
- comments = tokenizer.getComments()
-
- if tokenValue in ("get", "set") and tokenizer.peek() == "identifier":
- if staticContext.ecma3OnlyMode:
- raise SyntaxError("Illegal property accessor", tokenizer)
-
- fd = FunctionDefinition(tokenizer, staticContext, True, "expressed_form")
- builder.OBJECTINIT_addProperty(node, fd)
-
- else:
- if tokenType == "identifier" or tokenType == "number" or tokenType == "string":
- id = builder.PRIMARY_build(tokenizer, "identifier")
- builder.PRIMARY_finish(id)
-
- elif tokenType == "right_curly":
- if staticContext.ecma3OnlyMode:
- raise SyntaxError("Illegal trailing ,", tokenizer)
-
- tokenizer.unget()
- break
-
- else:
- if tokenValue in jasy.js.tokenize.Lang.keywords:
- id = builder.PRIMARY_build(tokenizer, "identifier")
- builder.PRIMARY_finish(id)
- else:
- print("Value is '%s'" % tokenValue)
- raise SyntaxError("Invalid property name", tokenizer)
-
- if tokenizer.match("colon"):
- childNode = builder.PROPERTYINIT_build(tokenizer)
- builder.COMMENTS_add(childNode, node, comments)
- builder.PROPERTYINIT_addOperand(childNode, id)
- builder.PROPERTYINIT_addOperand(childNode, AssignExpression(tokenizer, staticContext))
- builder.PROPERTYINIT_finish(childNode)
- builder.OBJECTINIT_addProperty(node, childNode)
-
- else:
- # Support, e.g., |var {staticContext, y} = o| as destructuring shorthand
- # for |var {staticContext: staticContext, y: y} = o|, per proposed JS2/ES4 for JS1.8.
- if tokenizer.peek() != "comma" and tokenizer.peek() != "right_curly":
- raise SyntaxError("Missing : after property", tokenizer)
- builder.OBJECTINIT_addProperty(node, id)
-
- if not tokenizer.match("comma"):
- break
-
- builder.COMMENTS_add(node, node, tokenizer.getComments())
- tokenizer.mustMatch("right_curly")
-
- builder.OBJECTINIT_finish(node)
-
- elif tokenType == "left_paren":
- # ParenExpression does its own matching on parentheses, so we need to unget.
- tokenizer.unget()
- node = ParenExpression(tokenizer, staticContext)
- node.parenthesized = True
-
- elif tokenType == "let":
- node = LetBlock(tokenizer, staticContext, False)
-
- elif tokenType in ["null", "this", "true", "false", "identifier", "number", "string", "regexp"]:
- node = builder.PRIMARY_build(tokenizer, tokenType)
- builder.PRIMARY_finish(node)
-
- else:
- raise SyntaxError("Missing operand. Found type: %s" % tokenType, tokenizer)
-
- return node
