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private static boolean inForcedStringContext ( Node n ) { if ( n . getParent ( ) . isGetElem ( ) && n . getParent ( ) . getLastChild ( ) == n ) { return true ; } return n . getParent ( ) . isAdd ( ) ; }
Returns whether this node must be coerced to a string .
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private Node tryFlattenArrayOrObjectLit ( Node parentLit ) { for ( Node child = parentLit . getFirstChild ( ) ; child != null ; ) { Node spread = child ; child = child . getNext ( ) ; if ( ! spread . isSpread ( ) ) { continue ; } Node innerLit = spread . getOnlyChild ( ) ; if ( ! parentLit . getToken ( ) . equals ( inn...
Flattens array - or object - literals that contain spreads of other literals .
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public void setWrapperPrefix ( String prefix ) { int prefixLine = 0 ; int prefixIndex = 0 ; for ( int i = 0 ; i < prefix . length ( ) ; ++ i ) { if ( prefix . charAt ( i ) == '\n' ) { prefixLine ++ ; prefixIndex = 0 ; } else { prefixIndex ++ ; } } prefixPosition = new FilePosition ( prefixLine , prefixIndex ) ; }
Sets the prefix used for wrapping the generated source file before it is written . This ensures that the source map is adjusted for the change in character offsets .
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public void setStartingPosition ( int offsetLine , int offsetIndex ) { checkState ( offsetLine >= 0 ) ; checkState ( offsetIndex >= 0 ) ; offsetPosition = new FilePosition ( offsetLine , offsetIndex ) ; }
Sets the source code that exists in the buffer for which the generated code is being generated . This ensures that the source map accurately reflects the fact that the source is being appended to an existing buffer and as such does not start at line 0 position 0 but rather some other line and position .
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public void addExtension ( String name , Object object ) throws SourceMapParseException { if ( ! name . startsWith ( "x_" ) ) { throw new SourceMapParseException ( "Extension '" + name + "' must start with 'x_'" ) ; } this . extensions . put ( name , object ) ; }
Adds field extensions to the json source map . The value is allowed to be any value accepted by json eg . string JsonObject JsonArray etc .
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private static void appendFirstField ( Appendable out , String name , CharSequence value ) throws IOException { appendFieldStart ( out , name , true ) ; out . append ( value ) ; }
Source map field helpers .
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private int prepMappings ( ) throws IOException { ( new MappingTraversal ( ) ) . traverse ( new UsedMappingCheck ( ) ) ; int id = 0 ; int maxLine = 0 ; for ( Mapping m : mappings ) { if ( m . used ) { m . id = id ++ ; int endPositionLine = m . endPosition . getLine ( ) ; maxLine = Math . max ( maxLine , endPositionLine...
Assigns sequential ids to used mappings and returns the last line mapped .
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public void appendIndexMapTo ( Appendable out , String name , List < SourceMapSection > sections ) throws IOException { out . append ( "{\n" ) ; appendFirstField ( out , "version" , "3" ) ; appendField ( out , "file" , escapeString ( name ) ) ; appendFieldStart ( out , "sections" ) ; out . append ( "[\n" ) ; boolean fi...
Appends the index source map to the given buffer .
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public static final void resetMaximumInputSize ( ) { String maxInputSizeStr = System . getProperty ( Protocol . MAX_INPUT_SIZE_KEY ) ; if ( maxInputSizeStr == null ) { maxInputSize = Protocol . FALLBACK_MAX_INPUT_SIZE ; } else { maxInputSize = Integer . parseInt ( maxInputSizeStr ) ; } }
Reset the maximum input size so that the property key is rechecked . This is needed for testing code because we are caching the maximum input size value .
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public boolean isConnectedInDirection ( DiGraphNode < N , E > dNode1 , Predicate < E > edgeMatcher , DiGraphNode < N , E > dNode2 ) { List < DiGraphEdge < N , E > > outEdges = dNode1 . getOutEdges ( ) ; int outEdgesLen = outEdges . size ( ) ; List < DiGraphEdge < N , E > > inEdges = dNode2 . getInEdges ( ) ; int inEdge...
DiGraphNode look ups can be expensive for a large graph operation prefer this method if you have the DiGraphNodes available .
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private static boolean insideGetCssNameCall ( Node n ) { Node parent = n . getParent ( ) ; return parent . isCall ( ) && parent . getFirstChild ( ) . matchesQualifiedName ( GET_CSS_NAME_FUNCTION ) ; }
Returns whether the node is an argument of a goog . getCssName call .
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protected boolean isWellDefined ( ) { int size = references . size ( ) ; if ( size == 0 ) { return false ; } Reference init = getInitializingReference ( ) ; if ( init == null ) { return false ; } checkState ( references . get ( 0 ) . isDeclaration ( ) ) ; BasicBlock initBlock = init . getBasicBlock ( ) ; for ( int i = ...
Determines if the variable for this reference collection is well - defined . A variable is well - defined if we can prove at compile - time that it s assigned a value before it s used .
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boolean isEscaped ( ) { Scope hoistScope = null ; for ( Reference ref : references ) { if ( hoistScope == null ) { hoistScope = ref . getScope ( ) . getClosestHoistScope ( ) ; } else if ( hoistScope != ref . getScope ( ) . getClosestHoistScope ( ) ) { return true ; } } return false ; }
Whether the variable is escaped into an inner function .
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Reference getInitializingReferenceForConstants ( ) { int size = references . size ( ) ; for ( int i = 0 ; i < size ; i ++ ) { if ( isInitializingDeclarationAt ( i ) || isInitializingAssignmentAt ( i ) ) { return references . get ( i ) ; } } return null ; }
Constants are allowed to be defined after their first use .
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private void protectSideEffects ( ) { if ( ! problemNodes . isEmpty ( ) ) { if ( ! preserveFunctionInjected ) { addExtern ( compiler ) ; } for ( Node n : problemNodes ) { Node name = IR . name ( PROTECTOR_FN ) . srcref ( n ) ; name . putBooleanProp ( Node . IS_CONSTANT_NAME , true ) ; Node replacement = IR . call ( nam...
Protect side - effect free nodes by making them parameters to a extern function call . This call will be removed after all the optimizations passes have run .
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static void addExtern ( AbstractCompiler compiler ) { Node name = IR . name ( PROTECTOR_FN ) ; name . putBooleanProp ( Node . IS_CONSTANT_NAME , true ) ; Node var = IR . var ( name ) ; JSDocInfoBuilder builder = new JSDocInfoBuilder ( false ) ; var . setJSDocInfo ( builder . build ( ) ) ; CompilerInput input = compiler...
Injects JSCOMPILER_PRESEVE into the synthetic externs
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private void unrollBinaryOperator ( Node n , Token op , String opStr , Context context , Context rhsContext , int leftPrecedence , int rightPrecedence ) { Node firstNonOperator = n . getFirstChild ( ) ; while ( firstNonOperator . getToken ( ) == op ) { firstNonOperator = firstNonOperator . getFirstChild ( ) ; } addExpr...
We could use addList recursively here but sometimes we produce very deeply nested operators and run out of stack space so we just unroll the recursion when possible .
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void addArrayList ( Node firstInList ) { boolean lastWasEmpty = false ; for ( Node n = firstInList ; n != null ; n = n . getNext ( ) ) { if ( n != firstInList ) { cc . listSeparator ( ) ; } addExpr ( n , 1 , Context . OTHER ) ; lastWasEmpty = n . isEmpty ( ) ; } if ( lastWasEmpty ) { cc . listSeparator ( ) ; } }
This function adds a comma - separated list as is specified by an ARRAYLIT node with the associated skipIndexes array . This is a space optimization since we avoid creating a whole Node object for each empty array literal slot .
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private String escapeUnrecognizedCharacters ( String s ) { StringBuilder sb = new StringBuilder ( ) ; for ( int i = 0 ; i < s . length ( ) ; i ++ ) { char c = s . charAt ( i ) ; switch ( c ) { case '\b' : case '\f' : case '\n' : case '\r' : case '\t' : case '\\' : case '\"' : case '\'' : case '$' : case '`' : case '\u2...
Helper to escape the characters that might be misinterpreted
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private static Node getFirstNonEmptyChild ( Node n ) { for ( Node c = n . getFirstChild ( ) ; c != null ; c = c . getNext ( ) ) { if ( c . isBlock ( ) ) { Node result = getFirstNonEmptyChild ( c ) ; if ( result != null ) { return result ; } } else if ( ! c . isEmpty ( ) ) { return c ; } } return null ; }
Gets the first non - empty child of the given node .
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private static Context getContextForArrowFunctionBody ( Context context ) { return context . inForInInitClause ( ) ? Context . START_OF_ARROW_FN_IN_FOR_INIT : Context . START_OF_ARROW_FN_BODY ; }
If we re at the start of an arrow function body we need parentheses around object literals and object patterns . We also must also pass the IN_FOR_INIT_CLAUSE flag into subexpressions .
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private boolean isValidDefineType ( JSTypeExpression expression ) { JSTypeRegistry registry = compiler . getTypeRegistry ( ) ; JSType type = registry . evaluateTypeExpressionInGlobalScope ( expression ) ; return ! type . isUnknownType ( ) && type . isSubtypeOf ( registry . getNativeType ( NUMBER_STRING_BOOLEAN ) ) ; }
Only defines of literal number string or boolean are supported .
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private static Node getConstantDeclValue ( Node name ) { Node parent = name . getParent ( ) ; if ( parent == null ) { return null ; } if ( name . isName ( ) ) { if ( parent . isConst ( ) ) { return name . getFirstChild ( ) ; } else if ( ! parent . isVar ( ) ) { return null ; } JSDocInfo jsdoc = NodeUtil . getBestJSDocI...
Checks whether the NAME node is inside either a CONST or a
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private static void setDefineInfoNotAssignable ( DefineInfo info , NodeTraversal t ) { info . setNotAssignable ( format ( REASON_DEFINE_NOT_ASSIGNABLE , t . getLineNumber ( ) , t . getSourceName ( ) ) ) ; }
Records the fact that because of the current node in the node traversal the define can t ever be assigned again .
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private static ImmutableList < String > computePathPrefixes ( String path ) { List < String > pieces = Q_NAME_SPLITTER . splitToList ( path ) ; ImmutableList . Builder < String > pathPrefixes = ImmutableList . builder ( ) ; String partial = pieces . get ( 0 ) ; pathPrefixes . add ( partial ) ; for ( int i = 1 ; i < pie...
Computes a list of the path prefixes constructed from the components of the path .
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private boolean isExportLhs ( Node lhs ) { if ( ! lhs . isQualifiedName ( ) ) { return false ; } return lhs . matchesQualifiedName ( "exports" ) || ( lhs . isGetProp ( ) && lhs . getFirstChild ( ) . matchesQualifiedName ( "exports" ) ) ; }
Is this the LHS of a goog . module export? i . e . Either exports or exports . name
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public List < String > getDependencies ( String code ) throws ServiceException { return getDependencies ( parseRequires ( code , true ) ) ; }
Gets a list of dependencies for the provided code .
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public List < String > getDependencies ( Collection < String > symbols ) throws ServiceException { return getDependencies ( symbols , new HashSet < String > ( ) ) ; }
Gets a list of dependencies for the provided list of symbols .
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private static Collection < String > parseRequires ( String code , boolean addClosureBase ) { ErrorManager errorManager = new LoggerErrorManager ( logger ) ; JsFileParser parser = new JsFileParser ( errorManager ) ; DependencyInfo deps = parser . parseFile ( "<unknown path>" , "<unknown path>" , code ) ; List < String ...
Parses a block of code for goog . require statements and extracts the required symbols .
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private DependencyInfo getDependencyInfo ( String symbol ) { for ( DependencyFile depsFile : depsFiles ) { DependencyInfo di = depsFile . getDependencyInfo ( symbol ) ; if ( di != null ) { return di ; } } return null ; }
Looks at each of the dependency files for dependency information .
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private boolean resolveViaRegistry ( ErrorReporter reporter ) { JSType type = registry . getType ( resolutionScope , reference ) ; if ( type != null ) { setReferencedAndResolvedType ( type , reporter ) ; return true ; } return false ; }
Resolves a named type by looking it up in the registry .
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private void resolveViaProperties ( ErrorReporter reporter ) { String [ ] componentNames = reference . split ( "\\." , - 1 ) ; if ( componentNames [ 0 ] . length ( ) == 0 ) { handleUnresolvedType ( reporter , true ) ; return ; } StaticTypedSlot slot = resolutionScope . getSlot ( componentNames [ 0 ] ) ; if ( slot == nu...
Resolves a named type by looking up its first component in the scope and subsequent components as properties . The scope must have been fully parsed and a symbol table constructed .
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private void handleUnresolvedType ( ErrorReporter reporter , boolean ignoreForwardReferencedTypes ) { boolean isForwardDeclared = ignoreForwardReferencedTypes && registry . isForwardDeclaredType ( reference ) ; if ( ! isForwardDeclared ) { String msg = "Bad type annotation. Unknown type " + reference ; warning ( report...
type name .
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private UndiGraph < Var , Void > computeVariableNamesInterferenceGraph ( ControlFlowGraph < Node > cfg , Set < ? extends Var > escaped ) { UndiGraph < Var , Void > interferenceGraph = LinkedUndirectedGraph . create ( ) ; List < Var > orderedVariables = liveness . getAllVariablesInOrder ( ) ; for ( Var v : orderedVariab...
In order to determine when it is appropriate to coalesce two variables we use a live variables analysis to make sure they are not alive at the same time . We take every pairing of variables and for every CFG node determine whether the two variables are alive at the same time . If two variables are alive at the same tim...
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private boolean isInMultipleLvalueDecl ( Var v ) { Token declarationType = v . declarationType ( ) ; switch ( declarationType ) { case LET : case CONST : case VAR : Node nameDecl = NodeUtil . getEnclosingNode ( v . getNode ( ) , NodeUtil :: isNameDeclaration ) ; return NodeUtil . findLhsNodesInNode ( nameDecl ) . size ...
Returns whether this variable s declaration also declares other names .
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private static void removeVarDeclaration ( Node name ) { Node var = NodeUtil . getEnclosingNode ( name , NodeUtil :: isNameDeclaration ) ; Node parent = var . getParent ( ) ; if ( var . getFirstChild ( ) . isDestructuringLhs ( ) ) { Node destructuringLhs = var . getFirstChild ( ) ; Node pattern = destructuringLhs . get...
Remove variable declaration if the variable has been coalesced with another variable that has already been declared .
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private static void makeDeclarationVar ( Var coalescedName ) { if ( coalescedName . isLet ( ) || coalescedName . isConst ( ) ) { Node declNode = NodeUtil . getEnclosingNode ( coalescedName . getParentNode ( ) , NodeUtil :: isNameDeclaration ) ; declNode . setToken ( Token . VAR ) ; } }
Because the code has already been normalized by the time this pass runs we can safely redeclare any let and const coalesced variables as vars
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private void visitMethod ( Node member , ClassDeclarationMetadata metadata ) { Node qualifiedMemberAccess = getQualifiedMemberAccess ( member , metadata ) ; Node method = member . getLastChild ( ) . detach ( ) ; Node assign = astFactory . createAssign ( qualifiedMemberAccess , method ) . useSourceInfoIfMissingFrom ( me...
Handles transpilation of a standard class member function . Getters setters and the constructor are not handled here .
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ResolveExportResult copy ( Node sourceNode , Binding . CreatedBy createdBy ) { checkNotNull ( sourceNode ) ; if ( binding == null ) { return this ; } return new ResolveExportResult ( binding . copy ( sourceNode , createdBy ) , state ) ; }
Creates a new result that has the given node for the source of the binding and given type of binding .
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private static void appendHexJavaScriptRepresentation ( int codePoint , Appendable out ) throws IOException { if ( Character . isSupplementaryCodePoint ( codePoint ) ) { char [ ] surrogates = Character . toChars ( codePoint ) ; appendHexJavaScriptRepresentation ( surrogates [ 0 ] , out ) ; appendHexJavaScriptRepresenta...
Returns a JavaScript representation of the character in a hex escaped format .
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protected Property getProperty ( String name ) { if ( ! properties . containsKey ( name ) ) { properties . put ( name , new Property ( name ) ) ; } return properties . get ( name ) ; }
Returns the property for the given name creating it if necessary .
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void renameProperties ( ) { int propsRenamed = 0 ; int propsSkipped = 0 ; int instancesRenamed = 0 ; int instancesSkipped = 0 ; int singleTypeProps = 0 ; Set < String > reported = new HashSet < > ( ) ; for ( Property prop : properties . values ( ) ) { if ( prop . shouldRename ( ) ) { UnionFind < JSType > pTypes = prop ...
Renames all properties with references on more than one type .
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private Map < JSType , String > buildPropNames ( Property prop ) { UnionFind < JSType > pTypes = prop . getTypes ( ) ; String pname = prop . name ; Map < JSType , String > names = new HashMap < > ( ) ; for ( Set < JSType > set : pTypes . allEquivalenceClasses ( ) ) { checkState ( ! set . isEmpty ( ) ) ; JSType represen...
Chooses a name to use for renaming in each equivalence class and maps the representative type of that class to that name .
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private ImmutableSet < JSType > getTypesToSkipForType ( JSType type ) { type = type . restrictByNotNullOrUndefined ( ) ; if ( type . isUnionType ( ) ) { ImmutableSet . Builder < JSType > types = ImmutableSet . builder ( ) ; types . add ( type ) ; for ( JSType alt : type . getUnionMembers ( ) ) { types . addAll ( getTyp...
Returns a set of types that should be skipped given the given type . This is necessary for interfaces as all super interfaces must also be skipped .
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private Iterable < ? extends JSType > getTypeAlternatives ( JSType type ) { if ( type . isUnionType ( ) ) { return type . getUnionMembers ( ) ; } else { ObjectType objType = type . toMaybeObjectType ( ) ; FunctionType constructor = objType != null ? objType . getConstructor ( ) : null ; if ( constructor != null && cons...
Returns the alternatives if this is a type that represents multiple types and null if not . Union and interface types can correspond to multiple other types .
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private ObjectType getTypeWithProperty ( String field , JSType type ) { if ( type == null ) { return null ; } ObjectType foundType = gtwpCacheGet ( field , type ) ; if ( foundType != null ) { return foundType . equals ( bottomObjectType ) ? null : foundType ; } if ( type . isEnumElementType ( ) ) { foundType = getTypeW...
Returns the type in the chain from the given type that contains the given field or null if it is not found anywhere . Can return a subtype of the input type .
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private static JSType getInstanceIfPrototype ( JSType maybePrototype ) { if ( maybePrototype . isFunctionPrototypeType ( ) ) { FunctionType constructor = maybePrototype . toObjectType ( ) . getOwnerFunction ( ) ; if ( constructor != null ) { if ( ! constructor . hasInstanceType ( ) ) { return null ; } return constructo...
Returns the corresponding instance if maybePrototype is a prototype of a constructor otherwise null
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private void recordInterfaces ( FunctionType constructor , JSType relatedType , Property p ) { Iterable < ObjectType > interfaces = ancestorInterfaces . get ( constructor ) ; if ( interfaces == null ) { interfaces = constructor . getAncestorInterfaces ( ) ; ancestorInterfaces . put ( constructor , interfaces ) ; } for ...
Records that this property could be referenced from any interface that this type inherits from .
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private void populateFunctionDefinitions ( String name , List < Node > references ) { AmbiguatedFunctionSummary summaryForName = checkNotNull ( summariesByName . get ( name ) ) ; List < ImmutableList < Node > > rvaluesAssignedToName = references . stream ( ) . filter ( ( n ) -> ! isDefinitelyRValue ( n ) ) . map ( Node...
For a name and its set of references record the set of functions that may define that name or blacklist the name if there are unclear definitions .
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private void updateSideEffectsForExternFunction ( Node externFunction , AmbiguatedFunctionSummary summary ) { checkArgument ( externFunction . isFunction ( ) ) ; checkArgument ( externFunction . isFromExterns ( ) ) ; JSDocInfo info = NodeUtil . getBestJSDocInfo ( externFunction ) ; JSType typei = externFunction . getJS...
Update function for
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private void visitLhsNodes ( AmbiguatedFunctionSummary sideEffectInfo , Scope scope , Node enclosingFunction , List < Node > lhsNodes , Predicate < Node > hasLocalRhs ) { for ( Node lhs : lhsNodes ) { if ( NodeUtil . isGet ( lhs ) ) { if ( lhs . getFirstChild ( ) . isThis ( ) ) { sideEffectInfo . setMutatesThis ( ) ; }...
Record information about the side effects caused by assigning a value to a given LHS .
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private void visitCall ( AmbiguatedFunctionSummary callerInfo , Node invocation ) { if ( invocation . isCall ( ) && ! NodeUtil . functionCallHasSideEffects ( invocation , compiler ) ) { return ; } if ( invocation . isNew ( ) && ! NodeUtil . constructorCallHasSideEffects ( invocation ) ) { return ; } List < AmbiguatedFu...
Record information about a call site .
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boolean propagate ( AmbiguatedFunctionSummary callee , AmbiguatedFunctionSummary caller ) { int initialCallerFlags = caller . bitmask ; if ( callerIsAlias ) { caller . setMask ( callee . bitmask ) ; return caller . bitmask != initialCallerFlags ; } if ( callee . mutatesGlobalState ( ) ) { caller . setMutatesGlobalState...
Propagate the side effects from the callee to the caller .
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@ SuppressWarnings ( "ReferenceEquality" ) private boolean hasVisitedType ( TemplateType type ) { for ( TemplateType visitedType : visitedTypes ) { if ( visitedType == type ) { return true ; } } return false ; }
Checks if the specified type has already been visited during the Visitor s traversal of a JSType .
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protected Set < String > normalizeWhitelist ( Set < String > whitelist ) { Set < String > result = new HashSet < > ( ) ; for ( String line : whitelist ) { String trimmed = line . trim ( ) ; if ( trimmed . isEmpty ( ) || trimmed . charAt ( 0 ) == '#' ) { continue ; } result . add ( LINE_NUMBER . matcher ( trimmed ) . re...
Loads legacy warnings list from the set of strings . During development line numbers are changed very often - we just cut them and compare without ones .
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public void removeType ( StaticScope scope , String name ) { scopedNameTable . remove ( getRootNodeForScope ( getLookupScope ( scope , name ) ) , name ) ; }
Removes a type by name .
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private static boolean isObjectLiteralThatCanBeSkipped ( JSType t ) { t = t . restrictByNotNullOrUndefined ( ) ; return t . isRecordType ( ) || t . isLiteralObject ( ) ; }
we don t need to store these properties in the propertyIndex separately .
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public PropDefinitionKind canPropertyBeDefined ( JSType type , String propertyName ) { if ( type . isStruct ( ) ) { switch ( type . getPropertyKind ( propertyName ) ) { case KNOWN_PRESENT : return PropDefinitionKind . KNOWN ; case MAYBE_PRESENT : return PropDefinitionKind . KNOWN ; case ABSENT : return PropDefinitionKi...
Returns whether the given property can possibly be set on the given type .
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ObjectType findCommonSuperObject ( ObjectType a , ObjectType b ) { List < ObjectType > stackA = getSuperStack ( a ) ; List < ObjectType > stackB = getSuperStack ( b ) ; ObjectType result = getNativeObjectType ( JSTypeNative . OBJECT_TYPE ) ; while ( ! stackA . isEmpty ( ) && ! stackB . isEmpty ( ) ) { ObjectType curren...
Finds the common supertype of the two given object types .
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public void overwriteDeclaredType ( StaticScope scope , String name , JSType type ) { checkState ( isDeclaredForScope ( scope , name ) , "missing name %s" , name ) ; reregister ( scope , type , name ) ; }
Overrides a declared global type name . Throws an exception if this type name hasn t been declared yet .
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public JSType getType ( StaticTypedScope scope , String jsTypeName , String sourceName , int lineno , int charno ) { return getType ( scope , jsTypeName , sourceName , lineno , charno , true ) ; }
Looks up a type by name . To allow for forward references to types an unrecognized string has to be bound to a NamedType object that will be resolved later .
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public void resolveTypes ( ) { for ( NamedType type : unresolvedNamedTypes ) { type . resolve ( reporter ) ; } unresolvedNamedTypes . clear ( ) ; PrototypeObjectType globalThis = ( PrototypeObjectType ) getNativeType ( JSTypeNative . GLOBAL_THIS ) ; JSType windowType = getTypeInternal ( null , "Window" ) ; if ( globalT...
Resolve all the unresolved types in the given scope .
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public JSType createOptionalType ( JSType type ) { if ( type instanceof UnknownType || type . isAllType ( ) ) { return type ; } else { return createUnionType ( type , getNativeType ( JSTypeNative . VOID_TYPE ) ) ; } }
Creates a type representing optional values of the given type .
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public JSType createOptionalNullableType ( JSType type ) { return createUnionType ( type , getNativeType ( JSTypeNative . VOID_TYPE ) , getNativeType ( JSTypeNative . NULL_TYPE ) ) ; }
Creates a nullable and undefine - able value of the given type .
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public JSType createUnionType ( JSType ... variants ) { UnionTypeBuilder builder = UnionTypeBuilder . create ( this ) ; for ( JSType type : variants ) { builder . addAlternate ( type ) ; } return builder . build ( ) ; }
Creates a union type whose variants are the arguments .
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public JSType createUnionType ( JSTypeNative ... variants ) { UnionTypeBuilder builder = UnionTypeBuilder . create ( this ) ; for ( JSTypeNative typeId : variants ) { builder . addAlternate ( getNativeType ( typeId ) ) ; } return builder . build ( ) ; }
Creates a union type whose variants are the built - in types specified by the arguments .
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public EnumType createEnumType ( String name , Node source , JSType elementsType ) { return new EnumType ( this , name , source , elementsType ) ; }
Creates an enum type .
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public FunctionType createFunctionType ( JSType returnType , JSType ... parameterTypes ) { return createFunctionType ( returnType , createParameters ( parameterTypes ) ) ; }
Creates a function type .
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private Node createParameters ( boolean lastVarArgs , JSType ... parameterTypes ) { FunctionParamBuilder builder = new FunctionParamBuilder ( this ) ; int max = parameterTypes . length - 1 ; for ( int i = 0 ; i <= max ; i ++ ) { if ( lastVarArgs && i == max ) { builder . addVarArgs ( parameterTypes [ i ] ) ; } else { b...
Creates a tree hierarchy representing a typed argument list .
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public Node createOptionalParameters ( JSType ... parameterTypes ) { FunctionParamBuilder builder = new FunctionParamBuilder ( this ) ; builder . addOptionalParams ( parameterTypes ) ; return builder . build ( ) ; }
Creates a tree hierarchy representing a typed parameter list in which every parameter is optional .
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public FunctionType createFunctionTypeWithNewReturnType ( FunctionType existingFunctionType , JSType returnType ) { return FunctionType . builder ( this ) . copyFromOtherFunction ( existingFunctionType ) . withReturnType ( returnType ) . build ( ) ; }
Creates a new function type based on an existing function type but with a new return type .
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public ObjectType createAnonymousObjectType ( JSDocInfo info ) { PrototypeObjectType type = new PrototypeObjectType ( this , null , null , true ) ; type . setPrettyPrint ( true ) ; type . setJSDocInfo ( info ) ; return type ; }
Create an anonymous object type .
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public FunctionType createConstructorType ( String name , Node source , Node parameters , JSType returnType , ImmutableList < TemplateType > templateKeys , boolean isAbstract ) { checkArgument ( source == null || source . isFunction ( ) || source . isClass ( ) ) ; return FunctionType . builder ( this ) . forConstructor...
Creates a constructor function type .
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public FunctionType createInterfaceType ( String name , Node source , ImmutableList < TemplateType > templateKeys , boolean struct ) { FunctionType fn = FunctionType . builder ( this ) . forInterface ( ) . withName ( name ) . withSourceNode ( source ) . withEmptyParams ( ) . withTemplateKeys ( templateKeys ) . build ( ...
Creates an interface function type .
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public TemplateTypeMap createTemplateTypeMap ( ImmutableList < TemplateType > templateKeys , ImmutableList < JSType > templateValues ) { if ( templateKeys == null ) { templateKeys = ImmutableList . of ( ) ; } if ( templateValues == null ) { templateValues = ImmutableList . of ( ) ; } return ( templateKeys . isEmpty ( )...
Creates a template type map from the specified list of template keys and template value types .
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public NamedType createNamedType ( StaticTypedScope scope , String reference , String sourceName , int lineno , int charno ) { return new NamedType ( scope , this , reference , sourceName , lineno , charno ) ; }
Creates a named type .
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@ SuppressWarnings ( "unchecked" ) public JSType createTypeFromCommentNode ( Node n , String sourceName , StaticTypedScope scope ) { return createFromTypeNodesInternal ( n , sourceName , scope , true ) ; }
Creates a JSType from the nodes representing a type .
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private JSType createRecordTypeFromNodes ( Node n , String sourceName , StaticTypedScope scope ) { RecordTypeBuilder builder = new RecordTypeBuilder ( this ) ; for ( Node fieldTypeNode = n . getFirstChild ( ) ; fieldTypeNode != null ; fieldTypeNode = fieldTypeNode . getNext ( ) ) { Node fieldNameNode = fieldTypeNode ; ...
Creates a RecordType from the nodes representing said record type .
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public void registerTemplateTypeNamesInScope ( Iterable < TemplateType > keys , Node scopeRoot ) { for ( TemplateType key : keys ) { scopedNameTable . put ( scopeRoot , key . getReferenceName ( ) , key ) ; } }
Registers template types on the given scope root . This takes a Node rather than a StaticScope because at the time it is called the scope has not yet been created .
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public StaticTypedScope createScopeWithTemplates ( StaticTypedScope scope , Iterable < TemplateType > templates ) { return new SyntheticTemplateScope ( scope , templates ) ; }
Returns a new scope that includes the given template names for type resolution purposes .
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@ SuppressWarnings ( "unchecked" ) @ GwtIncompatible ( "ObjectOutputStream" ) public void saveContents ( ObjectOutputStream out ) throws IOException { out . writeObject ( eachRefTypeIndexedByProperty ) ; out . writeObject ( interfaceToImplementors ) ; out . writeObject ( typesIndexedByProperty ) ; }
Saves the derived state .
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@ SuppressWarnings ( "unchecked" ) @ GwtIncompatible ( "ObjectInputStream" ) public void restoreContents ( ObjectInputStream in ) throws IOException , ClassNotFoundException { eachRefTypeIndexedByProperty = ( Map < String , Map < String , ObjectType > > ) in . readObject ( ) ; interfaceToImplementors = ( Multimap < Str...
Restores the derived state .
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private void suppressBehavior ( Node behaviorValue , Node reportNode ) { if ( behaviorValue == null ) { compiler . report ( JSError . make ( reportNode , PolymerPassErrors . POLYMER_UNQUALIFIED_BEHAVIOR ) ) ; return ; } if ( behaviorValue . isArrayLit ( ) ) { for ( Node child : behaviorValue . children ( ) ) { suppress...
Strip property type annotations and add suppressions on functions .
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public static void encode ( Appendable out , int value ) throws IOException { value = toVLQSigned ( value ) ; do { int digit = value & VLQ_BASE_MASK ; value >>>= VLQ_BASE_SHIFT ; if ( value > 0 ) { digit |= VLQ_CONTINUATION_BIT ; } out . append ( Base64 . toBase64 ( digit ) ) ; } while ( value > 0 ) ; }
Writes a VLQ encoded value to the provide appendable .
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public static int decode ( CharIterator in ) { int result = 0 ; boolean continuation ; int shift = 0 ; do { char c = in . next ( ) ; int digit = Base64 . fromBase64 ( c ) ; continuation = ( digit & VLQ_CONTINUATION_BIT ) != 0 ; digit &= VLQ_BASE_MASK ; result = result + ( digit << shift ) ; shift = shift + VLQ_BASE_SHI...
Decodes the next VLQValue from the provided CharIterator .
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public List < Symbol > getAllSymbolsSorted ( ) { List < Symbol > sortedSymbols = getNaturalSymbolOrdering ( ) . sortedCopy ( symbols . values ( ) ) ; return sortedSymbols ; }
Get the symbols in their natural ordering . Always returns a mutable list .
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public Symbol getSymbolForScope ( SymbolScope scope ) { if ( scope . getSymbolForScope ( ) == null ) { scope . setSymbolForScope ( findSymbolForScope ( scope ) ) ; } return scope . getSymbolForScope ( ) ; }
All local scopes are associated with a function and some functions are associated with a symbol . Returns the symbol associated with the given scope .
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private Symbol findSymbolForScope ( SymbolScope scope ) { Node rootNode = scope . getRootNode ( ) ; if ( rootNode . getParent ( ) == null ) { return globalScope . getSlot ( GLOBAL_THIS ) ; } if ( ! rootNode . isFunction ( ) ) { return null ; } String name = NodeUtil . getBestLValueName ( NodeUtil . getBestLValue ( root...
Find the symbol associated with the given scope . Notice that we won t always be able to figure out this association dynamically so sometimes we ll just create the association when we create the scope .
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public Symbol getSymbolDeclaredBy ( FunctionType fn ) { checkState ( fn . isConstructor ( ) || fn . isInterface ( ) ) ; ObjectType instanceType = fn . getInstanceType ( ) ; return getSymbolForName ( fn . getSource ( ) , instanceType . getReferenceName ( ) ) ; }
Gets the symbol for the given constructor or interface .
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public Symbol getSymbolForInstancesOf ( Symbol sym ) { FunctionType fn = sym . getFunctionType ( ) ; if ( fn != null && fn . isNominalConstructor ( ) ) { return getSymbolForInstancesOf ( fn ) ; } return null ; }
Gets the symbol for the prototype if this is the symbol for a constructor or interface .
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public Symbol getSymbolForInstancesOf ( FunctionType fn ) { checkState ( fn . isConstructor ( ) || fn . isInterface ( ) ) ; ObjectType pType = fn . getPrototype ( ) ; return getSymbolForName ( fn . getSource ( ) , pType . getReferenceName ( ) ) ; }
Gets the symbol for the prototype of the given constructor or interface .
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public List < Symbol > getAllSymbolsForType ( JSType type ) { if ( type == null ) { return ImmutableList . of ( ) ; } UnionType unionType = type . toMaybeUnionType ( ) ; if ( unionType != null ) { List < Symbol > result = new ArrayList < > ( 2 ) ; for ( JSType alt : unionType . getAlternates ( ) ) { Symbol altSym = get...
Gets all symbols associated with the given type . For union types this may be multiple symbols . For instance types this will return the constructor of that instance .
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private Symbol getSymbolForTypeHelper ( JSType type , boolean linkToCtor ) { if ( type == null ) { return null ; } if ( type . isGlobalThisType ( ) ) { return globalScope . getSlot ( GLOBAL_THIS ) ; } else if ( type . isNominalConstructor ( ) ) { return linkToCtor ? globalScope . getSlot ( "Function" ) : getSymbolDecla...
Gets all symbols associated with the given type . If there is more that one symbol associated with the given type return null .
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void findScopes ( Node externs , Node root ) { NodeTraversal . traverseRoots ( compiler , new NodeTraversal . AbstractScopedCallback ( ) { public void enterScope ( NodeTraversal t ) { createScopeFrom ( t . getScope ( ) ) ; } public void visit ( NodeTraversal t , Node n , Node p ) { } } , externs , root ) ; }
Finds all the scopes and adds them to this symbol table .
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public void addAnonymousFunctions ( ) { TreeSet < SymbolScope > scopes = new TreeSet < > ( lexicalScopeOrdering ) ; for ( SymbolScope scope : getAllScopes ( ) ) { if ( scope . isLexicalScope ( ) ) { scopes . add ( scope ) ; } } for ( SymbolScope scope : scopes ) { addAnonymousFunctionsInScope ( scope ) ; } }
Finds anonymous functions in local scopes and gives them names and symbols . They will show up as local variables with names function%0 function%1 etc .
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private Symbol isAnySymbolDeclared ( String name , Node declNode , SymbolScope scope ) { Symbol sym = symbols . get ( declNode , name ) ; if ( sym == null ) { return scope . ownSymbols . get ( name ) ; } return sym ; }
Checks if any symbol is already declared at the given node and scope for the given name . If so returns it .
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private < S extends StaticSlot , R extends StaticRef > StaticRef findBestDeclToAdd ( StaticSymbolTable < S , R > otherSymbolTable , S slot ) { StaticRef decl = slot . getDeclaration ( ) ; if ( isGoodRefToAdd ( decl ) ) { return decl ; } for ( R ref : otherSymbolTable . getReferences ( slot ) ) { if ( isGoodRefToAdd ( r...
Helper for addSymbolsFrom to determine the best declaration spot .
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private void mergeSymbol ( Symbol from , Symbol to ) { for ( Node nodeToMove : from . references . keySet ( ) ) { if ( ! nodeToMove . equals ( from . getDeclarationNode ( ) ) ) { to . defineReferenceAt ( nodeToMove ) ; } } removeSymbol ( from ) ; }
Merges from symbol to to symbol by moving all references to point to the to symbol and removing from symbol .
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void pruneOrphanedNames ( ) { nextSymbol : for ( Symbol s : getAllSymbols ( ) ) { if ( s . isProperty ( ) ) { continue ; } String currentName = s . getName ( ) ; int dot = - 1 ; while ( - 1 != ( dot = currentName . lastIndexOf ( '.' ) ) ) { currentName = currentName . substring ( 0 , dot ) ; Symbol owner = s . scope . ...
Removes symbols where the namespace they re on has been removed .
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void fillJSDocInfo ( Node externs , Node root ) { NodeTraversal . traverseRoots ( compiler , new JSDocInfoCollector ( compiler . getTypeRegistry ( ) ) , externs , root ) ; for ( Symbol sym : getAllSymbols ( ) ) { JSDocInfo info = sym . getJSDocInfo ( ) ; if ( info == null ) { continue ; } for ( Marker marker : info . g...
Index JSDocInfo .