| // Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE.md file. |
| |
| import 'package:front_end/src/fasta/type_inference/type_inference_engine.dart'; |
| import 'package:kernel/ast.dart'; |
| |
| /// Base class for [TypeInferenceListener] that defines the API for debugging. |
| /// |
| /// By default no debug info is printed. To enable debug printing, mix in |
| /// [TypeInferenceDebugging]. |
| class TypeInferenceBase { |
| void debugDependency(AccessorNode accessorNode) {} |
| |
| bool genericExpressionEnter( |
| String expressionType, Expression expression, DartType typeContext) { |
| return false; |
| } |
| |
| void genericExpressionExit( |
| String expressionType, Expression expression, DartType inferredType) {} |
| |
| void genericInitializerEnter( |
| String initializerType, Initializer initializer) {} |
| |
| void genericInitializerExit( |
| String initializerType, Initializer initializer) {} |
| |
| void genericStatementEnter(String statementType, Statement statement) {} |
| |
| void genericStatementExit(String statementType, Statement statement) {} |
| } |
| |
| /// Mixin which can be applied to [TypeInferenceListener] to cause debug info to |
| /// be printed. |
| class TypeInferenceDebugging implements TypeInferenceBase { |
| void debugDependency(AccessorNode accessorNode) { |
| print('Dependency $accessorNode'); |
| } |
| |
| bool genericExpressionEnter( |
| String expressionType, Expression expression, DartType typeContext) { |
| print('Enter $expressionType($expression) (context=$typeContext)'); |
| return true; |
| } |
| |
| void genericExpressionExit( |
| String expressionType, Expression expression, DartType inferredType) { |
| print('Exit $expressionType($expression) (type=$inferredType)'); |
| } |
| |
| void genericInitializerEnter( |
| String initializerType, Initializer initializer) { |
| print('Enter $initializerType($initializer)'); |
| } |
| |
| void genericInitializerExit(String initializerType, Initializer initializer) { |
| print('Exit $initializerType($initializer)'); |
| } |
| |
| void genericStatementEnter(String statementType, Statement statement) { |
| print('Enter $statementType($statement)'); |
| } |
| |
| void genericStatementExit(String statementType, Statement statement) { |
| print('Exit $statementType($statement)'); |
| } |
| } |
| |
| /// Callback interface used by [TypeInferrer] to report the results of type |
| /// inference to a client. |
| /// |
| /// The interface is structured as a set of enter/exit methods. The enter |
| /// methods are called as the inferrer recurses down through the AST, and the |
| /// exit methods are called on the way back up. The enter methods take a |
| /// [DartType] argument representing the downwards inference context, and return |
| /// a bool indicating whether the TypeInferenceListener needs to know the final |
| /// inferred type; the exit methods take [DartType] argument representing the |
| /// final inferred type. |
| /// |
| /// The default implementation (in this base class) does nothing, however it can |
| /// be used to debug type inference by uncommenting the |
| /// "with TypeInferenceDebugging" clause below. |
| class TypeInferenceListener |
| extends TypeInferenceBase // with TypeInferenceDebugging |
| { |
| bool asExpressionEnter(AsExpression expression, DartType typeContext) => |
| genericExpressionEnter("asExpression", expression, typeContext); |
| |
| void asExpressionExit(AsExpression expression, DartType inferredType) => |
| genericExpressionExit("asExpression", expression, inferredType); |
| |
| void assertStatementEnter(AssertStatement statement) => |
| genericStatementEnter('assertStatement', statement); |
| |
| void assertStatementExit(AssertStatement statement) => |
| genericStatementExit('assertStatement', statement); |
| |
| bool awaitExpressionEnter(AwaitExpression expression, DartType typeContext) => |
| genericExpressionEnter("awaitExpression", expression, typeContext); |
| |
| void awaitExpressionExit(AwaitExpression expression, DartType inferredType) => |
| genericExpressionExit("awaitExpression", expression, inferredType); |
| |
| void blockEnter(Block statement) => genericStatementEnter('block', statement); |
| |
| void blockExit(Block statement) => genericStatementExit('block', statement); |
| |
| bool boolLiteralEnter(BoolLiteral expression, DartType typeContext) => |
| genericExpressionEnter("boolLiteral", expression, typeContext); |
| |
| void boolLiteralExit(BoolLiteral expression, DartType inferredType) => |
| genericExpressionExit("boolLiteral", expression, inferredType); |
| |
| void breakStatementEnter(BreakStatement statement) => |
| genericStatementEnter('breakStatement', statement); |
| |
| void breakStatementExit(BreakStatement statement) => |
| genericStatementExit('breakStatement', statement); |
| |
| bool cascadeExpressionEnter(Let expression, DartType typeContext) => |
| genericExpressionEnter("cascade", expression, typeContext); |
| |
| void cascadeExpressionExit(Let expression, DartType inferredType) => |
| genericExpressionExit("cascade", expression, inferredType); |
| |
| bool conditionalExpressionEnter( |
| ConditionalExpression expression, DartType typeContext) => |
| genericExpressionEnter("conditionalExpression", expression, typeContext); |
| |
| void conditionalExpressionExit( |
| ConditionalExpression expression, DartType inferredType) => |
| genericExpressionExit("conditionalExpression", expression, inferredType); |
| |
| bool constructorInvocationEnter( |
| InvocationExpression expression, DartType typeContext) => |
| genericExpressionEnter("constructorInvocation", expression, typeContext); |
| |
| void constructorInvocationExit( |
| InvocationExpression expression, DartType inferredType) => |
| genericExpressionExit("constructorInvocation", expression, inferredType); |
| |
| void continueSwitchStatementEnter(ContinueSwitchStatement statement) => |
| genericStatementEnter('continueSwitchStatement', statement); |
| |
| void continueSwitchStatementExit(ContinueSwitchStatement statement) => |
| genericStatementExit('continueSwitchStatement', statement); |
| |
| void doStatementEnter(DoStatement statement) => |
| genericStatementEnter("doStatement", statement); |
| |
| void doStatementExit(DoStatement statement) => |
| genericStatementExit("doStatement", statement); |
| |
| bool doubleLiteralEnter(DoubleLiteral expression, DartType typeContext) => |
| genericExpressionEnter("doubleLiteral", expression, typeContext); |
| |
| void doubleLiteralExit(DoubleLiteral expression, DartType inferredType) => |
| genericExpressionExit("doubleLiteral", expression, inferredType); |
| |
| void dryRunEnter(Expression expression) => |
| genericExpressionEnter("dryRun", expression, null); |
| |
| void dryRunExit(Expression expression) => |
| genericExpressionExit("dryRun", expression, null); |
| |
| void expressionStatementEnter(ExpressionStatement statement) => |
| genericStatementEnter('expressionStatement', statement); |
| |
| void expressionStatementExit(ExpressionStatement statement) => |
| genericStatementExit('expressionStatement', statement); |
| |
| void forInStatementEnter(ForInStatement statement) => |
| genericStatementEnter('forInStatement', statement); |
| |
| void forInStatementExit(ForInStatement statement) => |
| genericStatementExit('forInStatement', statement); |
| |
| void forStatementEnter(ForStatement statement) => |
| genericStatementEnter('forStatement', statement); |
| |
| void forStatementExit(ForStatement statement) => |
| genericStatementExit('forStatement', statement); |
| |
| void functionDeclarationEnter(FunctionDeclaration statement) => |
| genericStatementEnter('functionDeclaration', statement); |
| |
| void functionDeclarationExit(FunctionDeclaration statement) => |
| genericStatementExit('functionDeclaration', statement); |
| |
| bool functionExpressionEnter( |
| FunctionExpression expression, DartType typeContext) => |
| genericExpressionEnter("functionExpression", expression, typeContext); |
| |
| void functionExpressionExit( |
| FunctionExpression expression, DartType inferredType) => |
| genericExpressionExit("functionExpression", expression, inferredType); |
| |
| bool ifNullEnter(Expression expression, DartType typeContext) => |
| genericExpressionEnter('ifNull', expression, typeContext); |
| |
| void ifNullExit(Expression expression, DartType inferredType) => |
| genericExpressionExit('ifNull', expression, inferredType); |
| |
| void ifStatementEnter(IfStatement statement) => |
| genericStatementEnter('ifStatement', statement); |
| |
| void ifStatementExit(IfStatement statement) => |
| genericStatementExit('ifStatement', statement); |
| |
| bool indexAssignEnter(Expression expression, DartType typeContext) => |
| genericExpressionEnter("indexAssign", expression, typeContext); |
| |
| void indexAssignExit(Expression expression, DartType inferredType) => |
| genericExpressionExit("indexAssign", expression, inferredType); |
| |
| bool intLiteralEnter(IntLiteral expression, DartType typeContext) => |
| genericExpressionEnter("intLiteral", expression, typeContext); |
| |
| void intLiteralExit(IntLiteral expression, DartType inferredType) => |
| genericExpressionExit("intLiteral", expression, inferredType); |
| |
| bool isExpressionEnter(IsExpression expression, DartType typeContext) => |
| genericExpressionEnter("isExpression", expression, typeContext); |
| |
| void isExpressionExit(IsExpression expression, DartType inferredType) => |
| genericExpressionExit("isExpression", expression, inferredType); |
| |
| bool isNotExpressionEnter(Not expression, DartType typeContext) => |
| genericExpressionEnter("isNotExpression", expression, typeContext); |
| |
| void isNotExpressionExit(Not expression, DartType inferredType) => |
| genericExpressionExit("isNotExpression", expression, inferredType); |
| |
| void labeledStatementEnter(LabeledStatement statement) => |
| genericStatementEnter('labeledStatement', statement); |
| |
| void labeledStatementExit(LabeledStatement statement) => |
| genericStatementExit('labeledStatement', statement); |
| |
| bool listLiteralEnter(ListLiteral expression, DartType typeContext) => |
| genericExpressionEnter("listLiteral", expression, typeContext); |
| |
| void listLiteralExit(ListLiteral expression, DartType inferredType) => |
| genericExpressionExit("listLiteral", expression, inferredType); |
| |
| bool logicalExpressionEnter( |
| LogicalExpression expression, DartType typeContext) => |
| genericExpressionEnter("logicalExpression", expression, typeContext); |
| |
| void logicalExpressionExit( |
| LogicalExpression expression, DartType inferredType) => |
| genericExpressionExit("logicalExpression", expression, inferredType); |
| |
| bool mapLiteralEnter(MapLiteral expression, DartType typeContext) => |
| genericExpressionEnter("mapLiteral", expression, typeContext); |
| |
| void mapLiteralExit(MapLiteral expression, DartType typeContext) => |
| genericExpressionExit("mapLiteral", expression, typeContext); |
| |
| bool methodInvocationEnter(Expression expression, DartType typeContext) => |
| genericExpressionEnter("methodInvocation", expression, typeContext); |
| |
| void methodInvocationExit(Expression expression, DartType inferredType) => |
| genericExpressionExit("methodInvocation", expression, inferredType); |
| |
| bool notEnter(Not expression, DartType typeContext) => |
| genericExpressionEnter("not", expression, typeContext); |
| |
| void notExit(Not expression, DartType inferredType) => |
| genericExpressionExit("not", expression, inferredType); |
| |
| bool nullLiteralEnter(NullLiteral expression, DartType typeContext) => |
| genericExpressionEnter("nullLiteral", expression, typeContext); |
| |
| void nullLiteralExit(NullLiteral expression, DartType inferredType) => |
| genericExpressionExit("nullLiteral", expression, inferredType); |
| |
| bool propertyAssignEnter(Expression expression, DartType typeContext) => |
| genericExpressionEnter("propertyAssign", expression, typeContext); |
| |
| void propertyAssignExit(Expression expression, DartType inferredType) => |
| genericExpressionExit("propertyAssign", expression, inferredType); |
| |
| bool propertyGetEnter(Expression expression, DartType typeContext) => |
| genericExpressionEnter("propertyGet", expression, typeContext); |
| |
| void propertyGetExit(Expression expression, DartType inferredType) => |
| genericExpressionExit("propertyGet", expression, inferredType); |
| |
| bool propertySetEnter(PropertySet expression, DartType typeContext) => |
| genericExpressionEnter("propertySet", expression, typeContext); |
| |
| void propertySetExit(PropertySet expression, DartType inferredType) => |
| genericExpressionExit("propertySet", expression, inferredType); |
| |
| void recordDependency(AccessorNode accessorNode) => |
| debugDependency(accessorNode); |
| |
| void redirectingInitializerEnter(RedirectingInitializer initializer) => |
| genericInitializerEnter("redirectingInitializer", initializer); |
| |
| void redirectingInitializerExit(RedirectingInitializer initializer) => |
| genericInitializerExit("redirectingInitializer", initializer); |
| |
| bool rethrowEnter(Rethrow expression, DartType typeContext) => |
| genericExpressionEnter('rethrow', expression, typeContext); |
| |
| void rethrowExit(Rethrow expression, DartType inferredType) => |
| genericExpressionExit('rethrow', expression, inferredType); |
| |
| void returnStatementEnter(ReturnStatement statement) => |
| genericStatementEnter('returnStatement', statement); |
| |
| void returnStatementExit(ReturnStatement statement) => |
| genericStatementExit('returnStatement', statement); |
| |
| bool staticAssignEnter(Expression expression, DartType typeContext) => |
| genericExpressionEnter("staticAssign", expression, typeContext); |
| |
| void staticAssignExit(Expression expression, DartType inferredType) => |
| genericExpressionExit("staticAssign", expression, inferredType); |
| |
| bool staticGetEnter(StaticGet expression, DartType typeContext) => |
| genericExpressionEnter("staticGet", expression, typeContext); |
| |
| void staticGetExit(StaticGet expression, DartType inferredType) => |
| genericExpressionExit("staticGet", expression, inferredType); |
| |
| bool staticInvocationEnter( |
| StaticInvocation expression, DartType typeContext) => |
| genericExpressionEnter("staticInvocation", expression, typeContext); |
| |
| void staticInvocationExit( |
| StaticInvocation expression, DartType inferredType) => |
| genericExpressionExit("staticInvocation", expression, inferredType); |
| |
| bool stringConcatenationEnter( |
| StringConcatenation expression, DartType typeContext) => |
| genericExpressionEnter("stringConcatenation", expression, typeContext); |
| |
| void stringConcatenationExit( |
| StringConcatenation expression, DartType inferredType) => |
| genericExpressionExit("stringConcatenation", expression, inferredType); |
| |
| bool stringLiteralEnter(StringLiteral expression, DartType typeContext) => |
| genericExpressionEnter("StringLiteral", expression, typeContext); |
| |
| void stringLiteralExit(StringLiteral expression, DartType inferredType) => |
| genericExpressionExit("StringLiteral", expression, inferredType); |
| |
| void switchStatementEnter(SwitchStatement statement) => |
| genericStatementEnter('switchStatement', statement); |
| |
| void switchStatementExit(SwitchStatement statement) => |
| genericStatementExit('switchStatement', statement); |
| |
| bool symbolLiteralEnter(SymbolLiteral expression, DartType typeContext) => |
| genericExpressionEnter("symbolLiteral", expression, typeContext); |
| |
| void symbolLiteralExit(SymbolLiteral expression, DartType inferredType) => |
| genericExpressionExit("symbolLiteral", expression, inferredType); |
| |
| bool thisExpressionEnter(ThisExpression expression, DartType typeContext) => |
| genericExpressionEnter("thisExpression", expression, typeContext); |
| |
| void thisExpressionExit(ThisExpression expression, DartType inferredType) => |
| genericExpressionExit("thisExpression", expression, inferredType); |
| |
| bool throwEnter(Throw expression, DartType typeContext) => |
| genericExpressionEnter('throw', expression, typeContext); |
| |
| void throwExit(Throw expression, DartType inferredType) => |
| genericExpressionExit('throw', expression, inferredType); |
| |
| void tryCatchEnter(TryCatch statement) => |
| genericStatementEnter('tryCatch', statement); |
| |
| void tryCatchExit(TryCatch statement) => |
| genericStatementExit('tryCatch', statement); |
| |
| void tryFinallyEnter(TryFinally statement) => |
| genericStatementEnter('tryFinally', statement); |
| |
| void tryFinallyExit(TryFinally statement) => |
| genericStatementExit('tryFinally', statement); |
| |
| bool typeLiteralEnter(TypeLiteral expression, DartType typeContext) => |
| genericExpressionEnter("typeLiteral", expression, typeContext); |
| |
| void typeLiteralExit(TypeLiteral expression, DartType inferredType) => |
| genericExpressionExit("typeLiteral", expression, inferredType); |
| |
| bool variableAssignEnter(Expression expression, DartType typeContext) => |
| genericExpressionEnter("variableAssign", expression, typeContext); |
| |
| void variableAssignExit(Expression expression, DartType inferredType) => |
| genericExpressionExit("variableAssign", expression, inferredType); |
| |
| void variableDeclarationEnter(VariableDeclaration statement) => |
| genericStatementEnter('variableDeclaration', statement); |
| |
| void variableDeclarationExit(VariableDeclaration statement) => |
| genericStatementExit('variableDeclaration', statement); |
| |
| bool variableGetEnter(VariableGet expression, DartType typeContext) => |
| genericExpressionEnter("variableGet", expression, typeContext); |
| |
| void variableGetExit(VariableGet expression, DartType inferredType) => |
| genericExpressionExit("variableGet", expression, inferredType); |
| |
| bool variableSetEnter(VariableSet expression, DartType typeContext) => |
| genericExpressionEnter("variableSet", expression, typeContext); |
| |
| void variableSetExit(VariableSet expression, DartType inferredType) => |
| genericExpressionExit("variableSet", expression, inferredType); |
| |
| void whileStatementEnter(WhileStatement statement) => |
| genericStatementEnter("whileStatement", statement); |
| |
| void whileStatementExit(WhileStatement statement) => |
| genericStatementExit("whileStatement", statement); |
| |
| void yieldStatementEnter(YieldStatement statement) => |
| genericStatementEnter('yieldStatement', statement); |
| |
| void yieldStatementExit(YieldStatement statement) => |
| genericStatementExit('yieldStatement', statement); |
| } |