Evaluate Class

(QmlJS::Evaluate)

The Evaluate class evaluates AST::Nodes to Values. More...

Header: #include <Evaluate>
Inherits: QmlJS::AST::Visitor (protected)

Public Functions

Evaluate(const QmlJS::ScopeChain *scopeChain, QmlJS::ReferenceContext *referenceContext = 0)
virtual ~Evaluate()
const QmlJS::Value *reference(AST::Node *ast)
const QmlJS::Value *value(AST::Node *ast)
const QmlJS::Value *operator()(AST::Node *ast)

Protected Functions

void accept(AST::Node *node)
const QmlJS::Value *switchResult(const QmlJS::Value *result)

Reimplemented Protected Functions

virtual bool visit(AST::UiProgram *ast) override
virtual bool visit(AST::UiHeaderItemList *ast) override
virtual bool visit(AST::NewMemberExpression *ast) override
virtual bool visit(AST::NewExpression *ast) override
virtual bool visit(AST::CallExpression *ast) override
virtual bool visit(AST::ArgumentList *ast) override
virtual bool visit(AST::PostIncrementExpression *ast) override
virtual bool visit(AST::PostDecrementExpression *ast) override
virtual bool visit(AST::DeleteExpression *ast) override
virtual bool visit(AST::VoidExpression *ast) override
virtual bool visit(AST::TypeOfExpression *ast) override
virtual bool visit(AST::PreIncrementExpression *ast) override
virtual bool visit(AST::PreDecrementExpression *ast) override
virtual bool visit(AST::UnaryPlusExpression *ast) override
virtual bool visit(AST::UnaryMinusExpression *ast) override
virtual bool visit(AST::TildeExpression *ast) override
virtual bool visit(AST::NotExpression *ast) override
virtual bool visit(AST::BinaryExpression *ast) override
virtual bool visit(AST::ConditionalExpression *ast) override
virtual bool visit(AST::Expression *ast) override
virtual bool visit(AST::Block *ast) override
virtual bool visit(AST::StatementList *ast) override
virtual bool visit(AST::VariableStatement *ast) override
virtual bool visit(AST::VariableDeclarationList *ast) override
virtual bool visit(AST::VariableDeclaration *ast) override
virtual bool visit(AST::EmptyStatement *ast) override
virtual bool visit(AST::ExpressionStatement *ast) override
virtual bool visit(AST::IfStatement *ast) override
virtual bool visit(AST::DoWhileStatement *ast) override
virtual bool visit(AST::WhileStatement *ast) override
virtual bool visit(AST::ForStatement *ast) override
virtual bool visit(AST::LocalForStatement *ast) override
virtual bool visit(AST::ForEachStatement *ast) override
virtual bool visit(AST::LocalForEachStatement *ast) override
virtual bool visit(AST::ContinueStatement *ast) override
virtual bool visit(AST::BreakStatement *ast) override
virtual bool visit(AST::ReturnStatement *ast) override
virtual bool visit(AST::WithStatement *ast) override
virtual bool visit(AST::UiQualifiedPragmaId *ast) override
virtual bool visit(AST::SwitchStatement *ast) override
virtual bool visit(AST::CaseBlock *ast) override
virtual bool visit(AST::CaseClauses *ast) override
virtual bool visit(AST::CaseClause *ast) override
virtual bool visit(AST::DefaultClause *ast) override
virtual bool visit(AST::LabelledStatement *ast) override
virtual bool visit(AST::ThrowStatement *ast) override
virtual bool visit(AST::TryStatement *ast) override
virtual bool visit(AST::Catch *ast) override
virtual bool visit(AST::Finally *ast) override
virtual bool visit(AST::FunctionDeclaration *ast) override
virtual bool visit(AST::FunctionExpression *ast) override
virtual bool visit(AST::FormalParameterList *ast) override
virtual bool visit(AST::FunctionBody *ast) override
virtual bool visit(AST::Program *ast) override
virtual bool visit(AST::SourceElements *ast) override
virtual bool visit(AST::FunctionSourceElement *ast) override
virtual bool visit(AST::StatementSourceElement *ast) override
virtual bool visit(AST::DebuggerStatement *ast) override
virtual bool visit(AST::UiPragma *ast) override
virtual bool visit(AST::UiImport *ast) override
virtual bool visit(AST::UiPublicMember *ast) override
virtual bool visit(AST::UiSourceElement *ast) override
virtual bool visit(AST::UiObjectDefinition *ast) override
virtual bool visit(AST::UiObjectInitializer *ast) override
virtual bool visit(AST::UiObjectBinding *ast) override
virtual bool visit(AST::UiScriptBinding *ast) override
virtual bool visit(AST::UiArrayBinding *ast) override
virtual bool visit(AST::UiObjectMemberList *ast) override
virtual bool visit(AST::UiArrayMemberList *ast) override
virtual bool visit(AST::UiQualifiedId *ast) override
virtual bool visit(AST::ThisExpression *ast) override
virtual bool visit(AST::IdentifierExpression *ast) override
virtual bool visit(AST::NullExpression *ast) override
virtual bool visit(AST::TrueLiteral *ast) override
virtual bool visit(AST::FalseLiteral *ast) override
virtual bool visit(AST::StringLiteral *ast) override
virtual bool visit(AST::NumericLiteral *ast) override
virtual bool visit(AST::RegExpLiteral *ast) override
virtual bool visit(AST::ArrayLiteral *ast) override
virtual bool visit(AST::ObjectLiteral *ast) override
virtual bool visit(AST::ElementList *ast) override
virtual bool visit(AST::Elision *ast) override
virtual bool visit(AST::PropertyAssignmentList *ast) override
virtual bool visit(AST::PropertyGetterSetter *ast) override
virtual bool visit(AST::PropertyNameAndValue *ast) override
virtual bool visit(AST::NestedExpression *ast) override
virtual bool visit(AST::IdentifierPropertyName *ast) override
virtual bool visit(AST::StringLiteralPropertyName *ast) override
virtual bool visit(AST::NumericLiteralPropertyName *ast) override
virtual bool visit(AST::ArrayMemberExpression *ast) override
virtual bool visit(AST::FieldMemberExpression *ast) override

Detailed Description

The Evaluate class evaluates AST::Nodes to Values.

The Evaluate visitor is constructed with a ScopeChain and accepts JavaScript expressions as well as some other AST::Nodes. It evaluates the expression in the given ScopeChain and returns a Value representing the result.

Example: Pass in the AST for "1 + 2" and NumberValue will be returned.

In normal cases only the call operator (or the equivalent value() function) will be used.

The reference() function has the special behavior of not resolving References which can be useful when interested in the identity of a variable instead of its value.

Example: In a scope where "var a = 1"

See also Value and ScopeChain.

Member Function Documentation

Evaluate::Evaluate(const QmlJS::ScopeChain *scopeChain, QmlJS::ReferenceContext *referenceContext = 0)

Default constructs an instance of Evaluate.

[virtual] Evaluate::~Evaluate()

Destroys the instance of Evaluate. The destructor is virtual.

[protected] void Evaluate::accept(AST::Node *node)

const QmlJS::Value *Evaluate::reference(AST::Node *ast)

[protected] const QmlJS::Value *Evaluate::switchResult(const QmlJS::Value *result)

const QmlJS::Value *Evaluate::value(AST::Node *ast)

[override virtual protected] bool Evaluate::visit(AST::UiProgram *ast)

[override virtual protected] bool Evaluate::visit(AST::UiHeaderItemList *ast)

[override virtual protected] bool Evaluate::visit(AST::NewMemberExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::NewExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::CallExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::ArgumentList *ast)

[override virtual protected] bool Evaluate::visit(AST::PostIncrementExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::PostDecrementExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::DeleteExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::VoidExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::TypeOfExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::PreIncrementExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::PreDecrementExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::UnaryPlusExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::UnaryMinusExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::TildeExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::NotExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::BinaryExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::ConditionalExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::Expression *ast)

[override virtual protected] bool Evaluate::visit(AST::Block *ast)

[override virtual protected] bool Evaluate::visit(AST::StatementList *ast)

[override virtual protected] bool Evaluate::visit(AST::VariableStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::VariableDeclarationList *ast)

[override virtual protected] bool Evaluate::visit(AST::VariableDeclaration *ast)

[override virtual protected] bool Evaluate::visit(AST::EmptyStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::ExpressionStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::IfStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::DoWhileStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::WhileStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::ForStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::LocalForStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::ForEachStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::LocalForEachStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::ContinueStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::BreakStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::ReturnStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::WithStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::UiQualifiedPragmaId *ast)

[override virtual protected] bool Evaluate::visit(AST::SwitchStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::CaseBlock *ast)

[override virtual protected] bool Evaluate::visit(AST::CaseClauses *ast)

[override virtual protected] bool Evaluate::visit(AST::CaseClause *ast)

[override virtual protected] bool Evaluate::visit(AST::DefaultClause *ast)

[override virtual protected] bool Evaluate::visit(AST::LabelledStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::ThrowStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::TryStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::Catch *ast)

[override virtual protected] bool Evaluate::visit(AST::Finally *ast)

[override virtual protected] bool Evaluate::visit(AST::FunctionDeclaration *ast)

[override virtual protected] bool Evaluate::visit(AST::FunctionExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::FormalParameterList *ast)

[override virtual protected] bool Evaluate::visit(AST::FunctionBody *ast)

[override virtual protected] bool Evaluate::visit(AST::Program *ast)

[override virtual protected] bool Evaluate::visit(AST::SourceElements *ast)

[override virtual protected] bool Evaluate::visit(AST::FunctionSourceElement *ast)

[override virtual protected] bool Evaluate::visit(AST::StatementSourceElement *ast)

[override virtual protected] bool Evaluate::visit(AST::DebuggerStatement *ast)

[override virtual protected] bool Evaluate::visit(AST::UiPragma *ast)

[override virtual protected] bool Evaluate::visit(AST::UiImport *ast)

[override virtual protected] bool Evaluate::visit(AST::UiPublicMember *ast)

[override virtual protected] bool Evaluate::visit(AST::UiSourceElement *ast)

[override virtual protected] bool Evaluate::visit(AST::UiObjectDefinition *ast)

[override virtual protected] bool Evaluate::visit(AST::UiObjectInitializer *ast)

[override virtual protected] bool Evaluate::visit(AST::UiObjectBinding *ast)

[override virtual protected] bool Evaluate::visit(AST::UiScriptBinding *ast)

[override virtual protected] bool Evaluate::visit(AST::UiArrayBinding *ast)

[override virtual protected] bool Evaluate::visit(AST::UiObjectMemberList *ast)

[override virtual protected] bool Evaluate::visit(AST::UiArrayMemberList *ast)

[override virtual protected] bool Evaluate::visit(AST::UiQualifiedId *ast)

[override virtual protected] bool Evaluate::visit(AST::ThisExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::IdentifierExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::NullExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::TrueLiteral *ast)

[override virtual protected] bool Evaluate::visit(AST::FalseLiteral *ast)

[override virtual protected] bool Evaluate::visit(AST::StringLiteral *ast)

[override virtual protected] bool Evaluate::visit(AST::NumericLiteral *ast)

[override virtual protected] bool Evaluate::visit(AST::RegExpLiteral *ast)

[override virtual protected] bool Evaluate::visit(AST::ArrayLiteral *ast)

[override virtual protected] bool Evaluate::visit(AST::ObjectLiteral *ast)

[override virtual protected] bool Evaluate::visit(AST::ElementList *ast)

[override virtual protected] bool Evaluate::visit(AST::Elision *ast)

[override virtual protected] bool Evaluate::visit(AST::PropertyAssignmentList *ast)

[override virtual protected] bool Evaluate::visit(AST::PropertyGetterSetter *ast)

[override virtual protected] bool Evaluate::visit(AST::PropertyNameAndValue *ast)

[override virtual protected] bool Evaluate::visit(AST::NestedExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::IdentifierPropertyName *ast)

[override virtual protected] bool Evaluate::visit(AST::StringLiteralPropertyName *ast)

[override virtual protected] bool Evaluate::visit(AST::NumericLiteralPropertyName *ast)

[override virtual protected] bool Evaluate::visit(AST::ArrayMemberExpression *ast)

[override virtual protected] bool Evaluate::visit(AST::FieldMemberExpression *ast)

const QmlJS::Value *Evaluate::operator()(AST::Node *ast)