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GlobalTypeInfo.java
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GlobalTypeInfo.java
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/*
* Copyright 2013 The Closure Compiler Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.javascript.jscomp;
import com.google.common.base.Preconditions;
import com.google.common.collect.HashBasedTable;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.LinkedHashMultimap;
import com.google.common.collect.Multimap;
import com.google.javascript.jscomp.AbstractCompiler.MostRecentTypechecker;
import com.google.javascript.jscomp.CodingConvention.Bind;
import com.google.javascript.jscomp.NewTypeInference.WarningReporter;
import com.google.javascript.jscomp.NodeTraversal.AbstractShallowCallback;
import com.google.javascript.jscomp.newtypes.Declaration;
import com.google.javascript.jscomp.newtypes.DeclaredFunctionType;
import com.google.javascript.jscomp.newtypes.EnumType;
import com.google.javascript.jscomp.newtypes.FunctionNamespace;
import com.google.javascript.jscomp.newtypes.FunctionType;
import com.google.javascript.jscomp.newtypes.FunctionTypeBuilder;
import com.google.javascript.jscomp.newtypes.JSType;
import com.google.javascript.jscomp.newtypes.JSTypeCreatorFromJSDoc;
import com.google.javascript.jscomp.newtypes.JSTypeCreatorFromJSDoc.FunctionAndSlotType;
import com.google.javascript.jscomp.newtypes.JSTypes;
import com.google.javascript.jscomp.newtypes.Namespace;
import com.google.javascript.jscomp.newtypes.NominalType;
import com.google.javascript.jscomp.newtypes.QualifiedName;
import com.google.javascript.jscomp.newtypes.RawNominalType;
import com.google.javascript.jscomp.newtypes.Typedef;
import com.google.javascript.jscomp.newtypes.UniqueNameGenerator;
import com.google.javascript.rhino.IR;
import com.google.javascript.rhino.JSDocInfo;
import com.google.javascript.rhino.Node;
import com.google.javascript.rhino.TypeI;
import com.google.javascript.rhino.TypeIRegistry;
import com.google.javascript.rhino.jstype.JSTypeNative;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Contains information about all scopes; for every variable reference computes
* whether it is local, a formal parameter, etc.; and computes information about
* the class hierarchy.
*
* <p>Used by the new type inference. See go/jscompiler-new-type-checker for the
* latest updates.
*
* @author blickly@google.com (Ben Lickly)
* @author dimvar@google.com (Dimitris Vardoulakis)
*/
class GlobalTypeInfo implements CompilerPass, TypeIRegistry {
static final DiagnosticType DUPLICATE_JSDOC = DiagnosticType.warning(
"JSC_NTI_DUPLICATE_JSDOC",
"Found two JsDoc comments for variable: {0}.\n");
static final DiagnosticType REDECLARED_PROPERTY = DiagnosticType.warning(
"JSC_NTI_REDECLARED_PROPERTY",
"Found two declarations for property {0} on {1}.\n");
static final DiagnosticType INVALID_PROP_OVERRIDE = DiagnosticType.warning(
"JSC_NTI_INVALID_PROP_OVERRIDE",
"Invalid redeclaration of property {0}.\n"
+ "inherited type : {1}\n"
+ "overriding type : {2}\n");
static final DiagnosticType CTOR_IN_DIFFERENT_SCOPE = DiagnosticType.warning(
"JSC_NTI_CTOR_IN_DIFFERENT_SCOPE",
"Modifying the prototype is only allowed if the constructor is "
+ "in the same scope\n");
static final DiagnosticType UNRECOGNIZED_TYPE_NAME = DiagnosticType.warning(
"JSC_NTI_UNRECOGNIZED_TYPE_NAME",
"Type annotation references non-existent type {0}.");
static final DiagnosticType STRUCTDICT_WITHOUT_CTOR = DiagnosticType.warning(
"JSC_NTI_STRUCTDICT_WITHOUT_CTOR",
"{0} used without @constructor.");
static final DiagnosticType EXPECTED_CONSTRUCTOR = DiagnosticType.warning(
"JSC_NTI_EXPECTED_CONSTRUCTOR",
"Expected constructor name but found {0}.");
static final DiagnosticType EXPECTED_INTERFACE = DiagnosticType.warning(
"JSC_NTI_EXPECTED_INTERFACE",
"Expected interface name but found {0}.");
static final DiagnosticType INEXISTENT_PARAM = DiagnosticType.warning(
"JSC_NTI_INEXISTENT_PARAM",
"parameter {0} does not appear in {1}''s parameter list");
static final DiagnosticType CONST_WITHOUT_INITIALIZER =
DiagnosticType.warning(
"JSC_NTI_CONST_WITHOUT_INITIALIZER",
"Constants must be initialized when they are defined.");
static final DiagnosticType COULD_NOT_INFER_CONST_TYPE =
DiagnosticType.warning(
"JSC_NTI_COULD_NOT_INFER_CONST_TYPE",
"All constants must be typed. The compiler could not infer the type "
+ "of this constant. Please use an explicit type annotation. "
+ "For more information, see:\n"
+ "https://github.com/google/closure-compiler/wiki/Using-NTI-(new-type-inference)#warnings-about-uninferred-constants");
static final DiagnosticType MISPLACED_CONST_ANNOTATION =
DiagnosticType.warning(
"JSC_NTI_MISPLACED_CONST_ANNOTATION",
"This property cannot be @const. "
+ "The @const annotation is only allowed for "
+ "properties of namespaces, prototype properties, "
+ "static properties of constructors, and "
+ "properties of the form this.prop declared inside constructors "
+ "and prototype methods.");
static final DiagnosticType CANNOT_OVERRIDE_FINAL_METHOD =
DiagnosticType.warning(
"JSC_NTI_CANNOT_OVERRIDE_FINAL_METHOD",
"Final method {0} cannot be overriden.");
static final DiagnosticType CANNOT_INIT_TYPEDEF =
DiagnosticType.warning(
"JSC_NTI_CANNOT_INIT_TYPEDEF",
"A typedef variable represents a type name; it cannot be assigned a value.");
static final DiagnosticType ANONYMOUS_NOMINAL_TYPE =
DiagnosticType.warning(
"JSC_NTI_ANONYMOUS_NOMINAL_TYPE",
"Must specify a name when defining a class or interface.");
static final DiagnosticType MALFORMED_ENUM =
DiagnosticType.warning(
"JSC_NTI_MALFORMED_ENUM",
"An enum must be initialized to a non-empty object literal.");
static final DiagnosticType DUPLICATE_PROP_IN_ENUM =
DiagnosticType.warning(
"JSC_NTI_DUPLICATE_PROP_IN_ENUM",
"Property {0} appears twice in the enum declaration.");
static final DiagnosticType LENDS_ON_BAD_TYPE =
DiagnosticType.warning(
"JSC_NTI_LENDS_ON_BAD_TYPE",
"May only lend properties to namespaces, constructors and their"
+ " prototypes. Found {0}.");
static final DiagnosticType FUNCTION_CONSTRUCTOR_NOT_DEFINED =
DiagnosticType.error(
"JSC_NTI_FUNCTION_CONSTRUCTOR_NOT_DEFINED",
"You must provide externs that define the built-in Function constructor.");
static final DiagnosticType INVALID_INTERFACE_PROP_INITIALIZER =
DiagnosticType.warning(
"JSC_NTI_INVALID_INTERFACE_PROP_INITIALIZER",
"Invalid initialization of interface property.");
static final DiagnosticType SETTER_WITH_RETURN =
DiagnosticType.warning(
"JSC_NTI_SETTER_WITH_RETURN",
"Cannot declare a return type on a setter.");
static final DiagnosticType WRONG_PARAMETER_COUNT =
DiagnosticType.warning(
"JSC_NTI_WRONG_PARAMETER_COUNT",
"Function definition does not have the declared number of parameters.\n"
+ "Expected: {0}\n"
+ "Found: {1}");
static final DiagnosticType CANNOT_ADD_PROPERTIES_TO_TYPEDEF =
DiagnosticType.warning(
"JSC_NTI_CANNOT_ADD_PROPERTIES_TO_TYPEDEF",
"A typedef should only be used in type annotations, not as a value."
+ " Adding properties to typedefs is not allowed.");
static final DiagnosticType SUPER_INTERFACES_HAVE_INCOMPATIBLE_PROPERTIES =
DiagnosticType.warning(
"JSC_NTI_SUPER_INTERFACES_HAVE_INCOMPATIBLE_PROPERTIES",
"Interface {0} has a property {1} with incompatible types in "
+ "its super interfaces: {2}");
static final DiagnosticType ONE_TYPE_FOR_MANY_VARS = DiagnosticType.warning(
"JSC_NTI_ONE_TYPE_FOR_MANY_VARS",
"Having one type annotation for multiple variables is not allowed.");
static final DiagnosticType UNKNOWN_OVERRIDE =
DiagnosticType.warning(
"JSC_NTI_UNKNOWN_OVERRIDE",
"property {0} not defined on any supertype of {1}");
static final DiagnosticType INTERFACE_METHOD_NOT_IMPLEMENTED =
DiagnosticType.warning(
"JSC_NTI_INTERFACE_METHOD_NOT_IMPLEMENTED",
"property {0} on interface {1} is not implemented by type {2}");
static final DiagnosticType INTERFACE_METHOD_NOT_EMPTY =
DiagnosticType.warning(
"JSC_NTI_INTERFACE_METHOD_NOT_EMPTY",
"interface member functions must have an empty body");
static final DiagnosticGroup COMPATIBLE_DIAGNOSTICS = new DiagnosticGroup(
CANNOT_OVERRIDE_FINAL_METHOD,
DUPLICATE_PROP_IN_ENUM,
EXPECTED_CONSTRUCTOR,
EXPECTED_INTERFACE,
FUNCTION_CONSTRUCTOR_NOT_DEFINED,
INEXISTENT_PARAM,
INTERFACE_METHOD_NOT_IMPLEMENTED,
INTERFACE_METHOD_NOT_EMPTY,
INVALID_INTERFACE_PROP_INITIALIZER,
INVALID_PROP_OVERRIDE,
LENDS_ON_BAD_TYPE,
ONE_TYPE_FOR_MANY_VARS,
REDECLARED_PROPERTY,
STRUCTDICT_WITHOUT_CTOR,
SUPER_INTERFACES_HAVE_INCOMPATIBLE_PROPERTIES,
UNKNOWN_OVERRIDE,
UNRECOGNIZED_TYPE_NAME,
WRONG_PARAMETER_COUNT);
static final DiagnosticGroup NEW_DIAGNOSTICS = new DiagnosticGroup(
ANONYMOUS_NOMINAL_TYPE,
CANNOT_ADD_PROPERTIES_TO_TYPEDEF,
CANNOT_INIT_TYPEDEF,
CONST_WITHOUT_INITIALIZER,
COULD_NOT_INFER_CONST_TYPE,
CTOR_IN_DIFFERENT_SCOPE,
DUPLICATE_JSDOC,
MALFORMED_ENUM,
MISPLACED_CONST_ANNOTATION,
SETTER_WITH_RETURN);
// An out-to-in list of the scopes, built during CollectNamedTypes
// This will be reversed at the end of GlobalTypeInfo to make sure
// that the scopes can be processed in-to-out in NewTypeInference.
private final List<NTIScope> scopes = new ArrayList<>();
private NTIScope globalScope;
private WarningReporter warnings;
private JSTypeCreatorFromJSDoc typeParser;
private final AbstractCompiler compiler;
private final CodingConvention convention;
private final Map<Node, String> anonFunNames = new LinkedHashMap<>();
// Uses %, which is not allowed in identifiers, to avoid naming clashes
// with existing functions.
private static final String ANON_FUN_PREFIX = "%anon_fun";
private static final String WINDOW_INSTANCE = "window";
private static final String WINDOW_CLASS = "Window";
private DefaultNameGenerator funNameGen;
private UniqueNameGenerator varNameGen;
// Only for original definitions, not for aliased constructors
private Map<Node, RawNominalType> nominaltypesByNode = new LinkedHashMap<>();
// Keyed on RawNominalTypes and property names
private HashBasedTable<RawNominalType, String, PropertyDef> propertyDefs =
HashBasedTable.create();
// TODO(dimvar): Eventually attach these to nodes, like the current types.
private Map<Node, JSType> castTypes = new LinkedHashMap<>();
private Map<Node, JSType> declaredObjLitProps = new LinkedHashMap<>();
private JSTypes commonTypes;
private final Set<String> unknownTypeNames;
GlobalTypeInfo(AbstractCompiler compiler, Set<String> unknownTypeNames) {
this.warnings = new WarningReporter(compiler);
this.compiler = compiler;
this.unknownTypeNames = unknownTypeNames;
this.convention = compiler.getCodingConvention();
this.varNameGen = new UniqueNameGenerator();
this.funNameGen = new DefaultNameGenerator(ImmutableSet.<String>of(), "", null);
this.typeParser = new JSTypeCreatorFromJSDoc(this.convention, this.varNameGen);
this.commonTypes = JSTypes.make();
JSType.setCommonTypes(this.commonTypes);
}
Collection<NTIScope> getScopes() {
return scopes;
}
NTIScope getGlobalScope() {
return this.globalScope;
}
JSTypes getTypesUtilObject() {
return commonTypes;
}
JSType getCastType(Node n) {
JSType t = castTypes.get(n);
Preconditions.checkNotNull(t);
return t;
}
JSType getPropDeclaredType(Node n) {
return declaredObjLitProps.get(n);
}
// Differs from the similar method in NTIScope class on how it treats qnames.
String getFunInternalName(Node n) {
Preconditions.checkArgument(n.isFunction());
if (anonFunNames.containsKey(n)) {
return anonFunNames.get(n);
}
Node fnNameNode = NodeUtil.getNameNode(n);
// We don't want to use qualified names here
Preconditions.checkState(fnNameNode != null);
Preconditions.checkState(fnNameNode.isName());
return fnNameNode.getString();
}
@Override
public void process(Node externs, Node root) {
Preconditions.checkNotNull(warnings, "Cannot rerun GlobalTypeInfo.process");
Preconditions.checkArgument(externs == null || externs.isSyntheticBlock());
Preconditions.checkArgument(root.isSyntheticBlock());
this.compiler.setMostRecentTypechecker(MostRecentTypechecker.NTI);
this.globalScope = new NTIScope(root, null, ImmutableList.<String>of(), commonTypes);
this.globalScope.addUnknownTypeNames(this.unknownTypeNames);
scopes.add(this.globalScope);
// Processing of a scope is split into many separate phases, and it's not
// straightforward to remember which phase does what.
// (1) Find names of classes, interfaces, typedefs, enums, and namespaces
// defined in the global scope.
CollectNamedTypes rootCnt = new CollectNamedTypes(this.globalScope);
if (externs != null) {
NodeTraversal.traverseEs6(compiler, externs, rootCnt);
}
NodeTraversal.traverseEs6(compiler, root, rootCnt);
// (2) Determine the type represented by each typedef and each enum
this.globalScope.resolveTypedefs(typeParser);
this.globalScope.resolveEnums(typeParser);
// (3) Repeat steps 1-2 for all the other scopes (outer-to-inner)
for (int i = 1; i < scopes.size(); i++) {
NTIScope s = scopes.get(i);
CollectNamedTypes cnt = new CollectNamedTypes(s);
NodeTraversal.traverseEs6(compiler, s.getBody(), cnt);
s.resolveTypedefs(typeParser);
s.resolveEnums(typeParser);
if (NewTypeInference.measureMem) {
NewTypeInference.updatePeakMem();
}
}
// If the Function constructor isn't defined, we cannot create function
// types. Exit early.
if (this.commonTypes.getFunctionType() == null) {
warnings.add(JSError.make(root, FUNCTION_CONSTRUCTOR_NOT_DEFINED));
return;
}
// (4) The bulk of the global-scope processing happens here:
// - Create scopes for functions
// - Declare properties on types
ProcessScope rootPs = new ProcessScope(this.globalScope);
if (externs != null) {
NodeTraversal.traverseEs6(compiler, externs, rootPs);
}
NodeTraversal.traverseEs6(compiler, root, rootPs);
// (5) Things that must happen after the traversal of the scope
rootPs.finishProcessingScope();
// (6) Repeat steps 4-5 for all the other scopes (outer-to-inner)
for (int i = 1; i < scopes.size(); i++) {
NTIScope s = scopes.get(i);
ProcessScope ps = new ProcessScope(s);
NodeTraversal.traverseEs6(compiler, s.getBody(), ps);
ps.finishProcessingScope();
if (NewTypeInference.measureMem) {
NewTypeInference.updatePeakMem();
}
}
// (7) Adjust types of properties based on inheritance information.
// Report errors in the inheritance chain. Do Window last.
RawNominalType win = null;
for (Map.Entry<Node, RawNominalType> entry : nominaltypesByNode.entrySet()) {
RawNominalType rawType = entry.getValue();
if (rawType.getName().equals(WINDOW_CLASS) && entry.getKey().isFromExterns()) {
win = rawType;
continue;
}
checkAndFinalizeNominalType(rawType);
}
if (win != null) {
// Copy properties from window to Window.prototype, because in rare cases
// people pass window around rather than using it directly.
Namespace winNs = this.globalScope.getNamespace(WINDOW_INSTANCE);
if (winNs != null) {
winNs.copyWindowProperties(this.commonTypes, win);
}
checkAndFinalizeNominalType(win);
}
nominaltypesByNode = null;
propertyDefs = null;
for (NTIScope s : scopes) {
s.finalizeScope();
}
Map<Node, String> unknownTypes = typeParser.getUnknownTypesMap();
for (Map.Entry<Node, String> unknownTypeEntry : unknownTypes.entrySet()) {
this.warnings.add(JSError.make(unknownTypeEntry.getKey(),
UNRECOGNIZED_TYPE_NAME, unknownTypeEntry.getValue()));
}
// The jsdoc parser doesn't have access to the error functions in the jscomp
// package, so we collect its warnings here.
for (JSError warning : typeParser.getWarnings()) {
this.warnings.add(warning);
}
this.warnings = null;
this.varNameGen = null;
this.funNameGen = null;
// If a scope s1 contains a scope s2, then s2 must be before s1 in scopes.
// The type inference relies on this fact to process deeper scopes
// before shallower scopes.
Collections.reverse(scopes);
}
private Collection<PropertyDef> getPropDefsFromInterface(
NominalType nominalType, String pname) {
Preconditions.checkArgument(nominalType.isFinalized());
Preconditions.checkArgument(
nominalType.isInterface() || nominalType.isBuiltinObject());
if (nominalType.getPropDeclaredType(pname) == null) {
return ImmutableSet.of();
} else if (propertyDefs.get(nominalType.getId(), pname) != null) {
return ImmutableSet.of(propertyDefs.get(nominalType.getId(), pname));
}
ImmutableSet.Builder<PropertyDef> result = ImmutableSet.builder();
for (NominalType interf : nominalType.getInstantiatedInterfaces()) {
result.addAll(getPropDefsFromInterface(interf, pname));
}
return result.build();
}
private PropertyDef getPropDefFromClass(NominalType nominalType, String pname) {
while (nominalType.getPropDeclaredType(pname) != null) {
Preconditions.checkArgument(nominalType.isFinalized());
Preconditions.checkArgument(nominalType.isClass());
if (propertyDefs.get(nominalType.getId(), pname) != null) {
return propertyDefs.get(nominalType.getId(), pname);
}
nominalType = nominalType.getInstantiatedSuperclass();
}
return null;
}
private void checkAndFinalizeNominalType(RawNominalType rawType) {
if (rawType.isFinalized()) {
return;
}
NominalType superClass = rawType.getSuperClass();
Set<String> nonInheritedPropNames = rawType.getAllOwnProps();
if (superClass != null && !superClass.isFinalized()) {
checkAndFinalizeNominalType(superClass.getRawNominalType());
}
for (NominalType superInterf : rawType.getInterfaces()) {
if (!superInterf.isFinalized()) {
checkAndFinalizeNominalType(superInterf.getRawNominalType());
}
}
Multimap<String, DeclaredFunctionType> propMethodTypesToProcess =
LinkedHashMultimap.create();
Multimap<String, JSType> propTypesToProcess = LinkedHashMultimap.create();
// Collect inherited types for extended classes
if (superClass != null) {
Preconditions.checkState(superClass.isFinalized());
// TODO(blickly): Can we optimize this to skip unnecessary iterations?
for (String pname : superClass.getAllPropsOfClass()) {
nonInheritedPropNames.remove(pname);
checkSuperProperty(rawType, superClass, pname,
propMethodTypesToProcess, propTypesToProcess);
}
}
// Collect inherited types for extended/implemented interfaces
for (NominalType superInterf : rawType.getInterfaces()) {
Preconditions.checkState(superInterf.isFinalized());
for (String pname : superInterf.getAllPropsOfInterface()) {
nonInheritedPropNames.remove(pname);
checkSuperProperty(rawType, superInterf, pname,
propMethodTypesToProcess, propTypesToProcess);
}
}
// Munge inherited types of methods
for (String pname : propMethodTypesToProcess.keySet()) {
Collection<DeclaredFunctionType> methodTypes =
propMethodTypesToProcess.get(pname);
Preconditions.checkState(!methodTypes.isEmpty());
PropertyDef localPropDef =
propertyDefs.get(rawType, pname);
// To find the declared type of a method, we must meet declared types
// from all inherited methods.
DeclaredFunctionType superMethodType = DeclaredFunctionType.meet(methodTypes);
DeclaredFunctionType localMethodType = localPropDef.methodType;
boolean getsTypeFromParent = getsTypeInfoFromParentMethod(localPropDef);
if (superMethodType == null) {
// If the inherited types are not compatible, pick one.
superMethodType = methodTypes.iterator().next();
warnings.add(JSError.make(localPropDef.defSite,
SUPER_INTERFACES_HAVE_INCOMPATIBLE_PROPERTIES,
rawType.getName(), pname, methodTypes.toString()));
} else if (getsTypeFromParent
&& localMethodType.getMaxArity() > superMethodType.getMaxArity()) {
// When getsTypeFromParent is true, we will miss the invalid override
// earlier, so we check here.
warnings.add(JSError.make(
localPropDef.defSite, INVALID_PROP_OVERRIDE, pname,
superMethodType.toFunctionType().toString(),
localMethodType.toFunctionType().toString()));
}
DeclaredFunctionType updatedMethodType = localMethodType
.withTypeInfoFromSuper(superMethodType, getsTypeFromParent);
localPropDef.updateMethodType(updatedMethodType);
propTypesToProcess.put(pname,
commonTypes.fromFunctionType(updatedMethodType.toFunctionType()));
}
// Check inherited types of all props
add_interface_props:
for (String pname : propTypesToProcess.keySet()) {
Collection<JSType> defs = propTypesToProcess.get(pname);
Preconditions.checkState(!defs.isEmpty());
JSType resultType = JSType.TOP;
for (JSType inheritedType : defs) {
resultType = JSType.meet(resultType, inheritedType);
if (!resultType.isBottom()) {
resultType = inheritedType;
} else {
warnings.add(JSError.make(
rawType.getDefSite(),
SUPER_INTERFACES_HAVE_INCOMPATIBLE_PROPERTIES,
rawType.getName(), pname,
defs.toString()));
continue add_interface_props;
}
}
// TODO(dimvar): check if we can have @const props here
rawType.addProtoProperty(pname, null, resultType, false);
}
// Warn when inheriting from incompatible IObject types
if (rawType.inheritsFromIObject()) {
JSType wrapped = rawType.getInstanceAsJSType();
if (wrapped.getIndexType() == null) {
warnings.add(JSError.make(
rawType.getDefSite(),
SUPER_INTERFACES_HAVE_INCOMPATIBLE_PROPERTIES,
rawType.getName(),
"IObject<K,V>#index",
"the keys K have types that can't be joined."));
} else if (wrapped.getIndexedType() == null) {
warnings.add(JSError.make(
rawType.getDefSite(),
SUPER_INTERFACES_HAVE_INCOMPATIBLE_PROPERTIES,
rawType.getName(),
"IObject<K,V>#index",
"the values V should have a common subtype."));
}
}
// Warn for a prop declared with @override that isn't overriding anything.
for (String pname : nonInheritedPropNames) {
PropertyDef propDef = propertyDefs.get(rawType, pname);
Preconditions.checkState(propDef != null || rawType.getName().equals(WINDOW_CLASS));
if (propDef != null) {
Node propDefsite = propDef.defSite;
JSDocInfo jsdoc = NodeUtil.getBestJSDocInfo(propDefsite);
if (jsdoc != null && jsdoc.isOverride()) {
warnings.add(JSError.make(propDefsite, UNKNOWN_OVERRIDE,
pname, rawType.getName()));
}
}
}
// Finalize nominal type once all properties are added.
rawType.finalize();
}
// TODO(dimvar): the finalization method and this one should be cleaned up;
// they are very hard to understand.
private void checkSuperProperty(
RawNominalType current, NominalType superType, String pname,
Multimap<String, DeclaredFunctionType> propMethodTypesToProcess,
Multimap<String, JSType> propTypesToProcess) {
JSType inheritedPropType = superType.getPropDeclaredType(pname);
if (inheritedPropType == null) {
// No need to go further for undeclared props.
return;
}
Collection<PropertyDef> inheritedPropDefs;
if (superType.isInterface()) {
inheritedPropDefs = getPropDefsFromInterface(superType, pname);
} else {
inheritedPropDefs =
ImmutableSet.of(getPropDefFromClass(superType, pname));
}
if (superType.isInterface() && current.isClass()
&& !current.mayHaveProp(pname)) {
warnings.add(JSError.make(
inheritedPropDefs.iterator().next().defSite,
INTERFACE_METHOD_NOT_IMPLEMENTED,
pname, superType.toString(), current.toString()));
return;
}
PropertyDef localPropDef = propertyDefs.get(current, pname);
JSType localPropType = localPropDef == null
? null : current.getInstancePropDeclaredType(pname);
if (localPropDef != null && superType.isClass()
&& localPropType != null
&& localPropType.getFunType() != null
&& superType.hasConstantProp(pname)) {
// TODO(dimvar): This doesn't work for multiple levels in the hierarchy.
// Clean up how we process inherited properties and then fix this.
warnings.add(JSError.make(
localPropDef.defSite, CANNOT_OVERRIDE_FINAL_METHOD, pname));
return;
}
if (localPropType == null && superType.isInterface()) {
// Add property from interface to class
propTypesToProcess.put(pname, inheritedPropType);
} else if (localPropType != null
&& !getsTypeInfoFromParentMethod(localPropDef)
&& !isValidOverride(localPropType, inheritedPropType)) {
warnings.add(JSError.make(
localPropDef.defSite, INVALID_PROP_OVERRIDE, pname,
inheritedPropType.toString(), localPropType.toString()));
} else if (localPropType != null && localPropDef.methodType != null) {
// If we are looking at a method definition, munging may be needed
for (PropertyDef inheritedPropDef : inheritedPropDefs) {
if (inheritedPropDef.methodType != null) {
propMethodTypesToProcess.put(pname,
inheritedPropDef.methodType.substituteNominalGenerics(superType));
}
}
}
}
private boolean isValidOverride(JSType localPropType, JSType inheritedPropType) {
FunctionType localFunType = localPropType.getFunTypeIfSingletonObj();
FunctionType inheritedFunType = inheritedPropType.getFunTypeIfSingletonObj();
if (localFunType == null) {
return localPropType.isSubtypeOf(inheritedPropType);
} else if (inheritedFunType == null) {
return false;
} else {
return localFunType.isValidOverride(inheritedFunType);
}
}
private static boolean getsTypeInfoFromParentMethod(PropertyDef pd) {
if (pd == null || pd.methodType == null) {
return false;
}
JSDocInfo jsdoc = NodeUtil.getBestJSDocInfo(pd.defSite);
return jsdoc == null
|| jsdoc.isOverride() && !jsdoc.containsFunctionDeclaration();
}
/**
* Collects names of classes, interfaces, namespaces, typedefs and enums.
* This way, if a type name appears before its declaration, we know what
* it refers to.
*/
private class CollectNamedTypes extends AbstractShallowCallback {
private final NTIScope currentScope;
CollectNamedTypes(NTIScope s) {
this.currentScope = s;
}
@Override
public void visit(NodeTraversal t, Node n, Node parent) {
switch (n.getType()) {
case FUNCTION: {
visitFunctionEarly(n);
break;
}
case VAR: {
Node nameNode = n.getFirstChild();
String varName = nameNode.getString();
if (NodeUtil.isNamespaceDecl(nameNode)) {
visitObjlitNamespace(nameNode);
} else if (NodeUtil.isTypedefDecl(nameNode)) {
visitTypedef(nameNode);
} else if (NodeUtil.isEnumDecl(nameNode)) {
visitEnum(nameNode);
} else if (isAliasedNamespaceDefinition(nameNode)) {
visitAliasedNamespace(nameNode);
} else if (varName.equals(WINDOW_INSTANCE)
&& nameNode.isFromExterns()) {
visitWindowVar(nameNode);
} else if (isCtorDefinedByCall(nameNode)) {
visitNewCtorDefinedByCall(nameNode);
}
if (!n.isFromExterns()
&& !this.currentScope.isDefinedLocally(varName, false)) {
// Add a dummy local to avoid shadowing errors, and to calculate
// escaped variables.
this.currentScope.addLocal(varName, JSType.UNKNOWN, false, false);
}
break;
}
case NAME: {
if (this.currentScope.isFunction()) {
NTIScope.mayRecordEscapedVar(this.currentScope, n.getString());
}
break;
}
case EXPR_RESULT: {
Node expr = n.getFirstChild();
switch (expr.getType()) {
case ASSIGN:
Node lhs = expr.getFirstChild();
if (isCtorDefinedByCall(lhs)) {
visitNewCtorDefinedByCall(lhs);
return;
}
if (!lhs.isGetProp()) {
return;
}
expr = lhs;
// fall through
case GETPROP:
if (isPrototypeProperty(expr)
|| NodeUtil.referencesThis(expr)
|| !expr.isQualifiedName()) {
// Class & prototype properties are handled in ProcessScope
return;
}
processQualifiedDefinition(expr);
break;
default:
break;
}
break;
}
default:
break;
}
}
private void visitWindowVar(Node nameNode) {
JSType typeInJsdoc = getVarTypeFromAnnotation(nameNode, this.currentScope);
if (!this.currentScope.isDefinedLocally(WINDOW_INSTANCE, false)) {
this.currentScope.addLocal(WINDOW_INSTANCE, typeInJsdoc, false, true);
return;
}
// The externs may contain multiple definitions of window, or they may add
// properties to the window instance before "var window" is defined.
// In those cases, we want to pick the definition that has the Window
// nominal type.
NominalType maybeWin = typeInJsdoc == null
? null : typeInJsdoc.getNominalTypeIfSingletonObj();
if (maybeWin != null && maybeWin.getName().equals(WINDOW_CLASS)) {
this.currentScope.addLocal(WINDOW_INSTANCE, typeInJsdoc, false, true);
}
}
private void processQualifiedDefinition(Node qnameNode) {
Preconditions.checkArgument(qnameNode.isGetProp());
Preconditions.checkArgument(qnameNode.isQualifiedName());
Node recv = qnameNode.getFirstChild();
if (!currentScope.isNamespace(recv)
&& !mayCreateFunctionNamespace(recv)
&& !mayCreateWindowNamespace(recv)) {
return;
}
if (NodeUtil.isNamespaceDecl(qnameNode)) {
visitObjlitNamespace(qnameNode);
} else if (NodeUtil.isTypedefDecl(qnameNode)) {
visitTypedef(qnameNode);
} else if (NodeUtil.isEnumDecl(qnameNode)) {
visitEnum(qnameNode);
} else if (isAliasedNamespaceDefinition(qnameNode)) {
visitAliasedNamespace(qnameNode);
} else if (isQualifiedFunctionDefinition(qnameNode)) {
maybeAddFunctionToNamespace(qnameNode);
}
}
private boolean isAliasedNamespaceDefinition(Node qnameNode) {
Node rhs = NodeUtil.getRValueOfLValue(qnameNode);
if (rhs == null || !rhs.isQualifiedName()) {
return false;
}
JSDocInfo jsdoc = NodeUtil.getBestJSDocInfo(qnameNode);
if (jsdoc == null) {
return qnameNode.isFromExterns()
// If the aliased namespace is a variable, do the aliasing at
// declaration, not at a random assignment later.
&& (qnameNode.getParent().isVar() || !qnameNode.isName())
&& this.currentScope.getNamespace(QualifiedName.fromNode(rhs)) != null;
} else {
return jsdoc.isConstructorOrInterface() || jsdoc.hasConstAnnotation();
}
}
private boolean isQualifiedFunctionDefinition(Node qnameNode) {
Preconditions.checkArgument(qnameNode.isGetProp());
Preconditions.checkArgument(qnameNode.isQualifiedName());
Node parent = qnameNode.getParent();
JSDocInfo jsdoc = NodeUtil.getBestJSDocInfo(qnameNode);
return parent.isAssign()
&& parent.getParent().isExprResult()
&& parent.getLastChild().isFunction()
&& (jsdoc == null || jsdoc.containsFunctionDeclaration());
}
// Returns true iff it creates a new function namespace
private boolean mayCreateFunctionNamespace(Node qnameNode) {
if (!qnameNode.isQualifiedName()) {
return false;
}
QualifiedName qname = QualifiedName.fromNode(qnameNode);
Preconditions.checkState(!currentScope.isNamespace(qname));
if (!currentScope.isKnownFunction(qname)) {
return false;
}
if (qnameNode.isGetProp()) {
markAssignNodeAsAnalyzed(qnameNode.getGrandparent());
}
NTIScope s;
if (qnameNode.isName()) {
// s is the scope that contains the function
s = currentScope.getScope(qnameNode.getString()).getParent();
} else {
s = currentScope;
}
s.addFunNamespace(qnameNode);
return true;
}
private boolean mayCreateWindowNamespace(Node qnameNode) {
if (qnameNode.isName() && qnameNode.getString().equals(WINDOW_INSTANCE)
&& this.currentScope.isGlobalVar(WINDOW_INSTANCE)) {
globalScope.addNamespaceLit(qnameNode);
return true;
}
return false;
}
private void visitObjlitNamespace(Node qnameNode) {
if (qnameNode.isGetProp()) {
markAssignNodeAsAnalyzed(qnameNode.getParent());
}
if (currentScope.isDefined(qnameNode)) {
if (qnameNode.isGetProp()
&& !NodeUtil.getRValueOfLValue(qnameNode).isOr()) {
warnings.add(JSError.make(qnameNode, REDECLARED_PROPERTY,
qnameNode.getLastChild().getString(),
qnameNode.getFirstChild().getQualifiedName()));
}
return;
}
currentScope.addNamespaceLit(qnameNode);
}
private void markAssignNodeAsAnalyzed(Node maybeAssign) {
if (maybeAssign.isAssign()) {
maybeAssign.putBooleanProp(Node.ANALYZED_DURING_GTI, true);
} else {
// No initializer for the property
Preconditions.checkState(maybeAssign.isExprResult());
}
}
private void visitTypedef(Node qnameNode) {
Preconditions.checkState(qnameNode.isQualifiedName());
qnameNode.putBooleanProp(Node.ANALYZED_DURING_GTI, true);
if (NodeUtil.getRValueOfLValue(qnameNode) != null) {
warnings.add(JSError.make(qnameNode, CANNOT_INIT_TYPEDEF));
}
if (currentScope.isDefined(qnameNode)) {
return;
}
JSDocInfo jsdoc = NodeUtil.getBestJSDocInfo(qnameNode);
Typedef td = Typedef.make(jsdoc.getTypedefType());
currentScope.addTypedef(qnameNode, td);
}
private void visitEnum(Node qnameNode) {
Preconditions.checkState(qnameNode.isQualifiedName());
qnameNode.putBooleanProp(Node.ANALYZED_DURING_GTI, true);
if (currentScope.isDefined(qnameNode)) {
return;
}
Node init = NodeUtil.getRValueOfLValue(qnameNode);
// First check if the definition is an alias of a previous enum.
if (init != null && init.isQualifiedName()) {
EnumType et = currentScope.getEnum(QualifiedName.fromNode(init));
if (et != null) {
currentScope.addNamespace(qnameNode, et);
return;
}
}
// Then check if the enum initializer is an object literal.
if (init == null || !init.isObjectLit() || init.getFirstChild() == null) {
warnings.add(JSError.make(qnameNode, MALFORMED_ENUM));
return;
}
// Last, read the object-literal properties and create the EnumType.
JSDocInfo jsdoc = NodeUtil.getBestJSDocInfo(qnameNode);
Set<String> propNames = new LinkedHashSet<>();
for (Node prop : init.children()) {
String pname = NodeUtil.getObjectLitKeyName(prop);
if (propNames.contains(pname)) {
warnings.add(JSError.make(qnameNode, DUPLICATE_PROP_IN_ENUM, pname));
}
propNames.add(pname);
}
currentScope.addNamespace(qnameNode,
EnumType.make(
commonTypes,
qnameNode.getQualifiedName(),
qnameNode,
jsdoc.getEnumParameterType(), ImmutableSet.copyOf(propNames)));
}
private void visitFunctionEarly(Node fn) {
JSDocInfo fnDoc = NodeUtil.getBestJSDocInfo(fn);
Node nameNode = NodeUtil.getNameNode(fn);
String internalName = createFunctionInternalName(fn, nameNode);
boolean isRedeclaration;
if (nameNode == null || !nameNode.isQualifiedName()) {
isRedeclaration = false;
} else if (nameNode.isName()) {
isRedeclaration = currentScope.isDefinedLocally(nameNode.getString(), false);
} else {
Preconditions.checkState(
nameNode.isGetProp(), "Expected getprop, found %s", nameNode.getType());
isRedeclaration = currentScope.isDefined(nameNode);
if (isRedeclaration && fnDoc != null) {
nameNode.getParent().putBooleanProp(Node.ANALYZED_DURING_GTI, true);
warnings.add(JSError.make(nameNode, REDECLARED_PROPERTY,
nameNode.getLastChild().getString(),
nameNode.getFirstChild().getQualifiedName()));
}
}
NTIScope fnScope = new NTIScope(fn, this.currentScope, collectFormals(fn, fnDoc), null);
if (!fn.isFromExterns()) {
scopes.add(fnScope);
}
this.currentScope.addLocalFunDef(internalName, fnScope);
maybeRecordNominalType(fn, nameNode, fnDoc, isRedeclaration);
}
private String createFunctionInternalName(Node fn, Node nameNode) {
String internalName = null;
if (nameNode == null || !nameNode.isName()
|| nameNode.getParent().isAssign()) {
// Anonymous functions, qualified names, and stray assignments
// (eg, f = function(x) { ... }; ) get gensymed names.
internalName = ANON_FUN_PREFIX + funNameGen.generateNextName();
anonFunNames.put(fn, internalName);
} else if (currentScope.isDefinedLocally(nameNode.getString(), false)) {
String fnName = nameNode.getString();
Preconditions.checkState(!fnName.contains("."));
internalName = ANON_FUN_PREFIX + funNameGen.generateNextName();
anonFunNames.put(fn, internalName);
} else {
// fnNameNode is undefined simple name
internalName = nameNode.getString();
}
return internalName;
}
private ArrayList<String> collectFormals(Node fn, JSDocInfo fnDoc) {
Preconditions.checkArgument(fn.isFunction());
// Collect the names of the formals.
// If a formal is a placeholder for variable arity, eg,
// /** @param {...?} var_args */ function f(var_args) { ... }
// then we don't collect it.
// But to decide that we can't just use the jsdoc b/c the type parser
// may ignore the jsdoc; the only reliable way is to collect the names of
// formals after building the declared function type.
ArrayList<String> formals = new ArrayList<>();