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LibJS: Hoist function declarations

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This patch adds function declaration hoisting. The mechanism
is similar to var hoisting. Hoisted function declarations are to be put
before the hoisted var declarations, hence they have to be treated
separately.
This commit is contained in:
Marcin Gasperowicz 2020-06-04 14:48:36 +02:00 • committed by Andreas Kling
parent e162b59a5e
commit 2579d0bf55
6 changed files with 73 additions and 15 deletions
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7
Libraries/LibJS/AST.h
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@ -40,6 +40,7 @@
namespace JS {
class VariableDeclaration;
class FunctionDeclaration;
template<class T, class... Args>
static inline NonnullRefPtr<T>
@ -124,8 +125,9 @@ public:
virtual void dump(int indent) const override;
void add_variables(NonnullRefPtrVector<VariableDeclaration>);
void add_functions(NonnullRefPtrVector<FunctionDeclaration>);
const NonnullRefPtrVector<VariableDeclaration>& variables() const { return m_variables; }
const NonnullRefPtrVector<FunctionDeclaration>& functions() const { return m_functions; }
bool in_strict_mode() const { return m_strict_mode; }
void set_strict_mode() { m_strict_mode = true; }
@ -136,6 +138,7 @@ private:
virtual bool is_scope_node() const final { return true; }
NonnullRefPtrVector<Statement> m_children;
NonnullRefPtrVector<VariableDeclaration> m_variables;
NonnullRefPtrVector<FunctionDeclaration> m_functions;
bool m_strict_mode { false };
};
@ -175,6 +178,7 @@ public:
const FlyString& name() const { return m_name; }
const Statement& body() const { return *m_body; }
const Vector<Parameter>& parameters() const { return m_parameters; };
i32 function_length() const { return m_function_length; }
protected:
FunctionNode(const FlyString& name, NonnullRefPtr<Statement> body, Vector<Parameter> parameters, i32 function_length, NonnullRefPtrVector<VariableDeclaration> variables)
@ -189,7 +193,6 @@ protected:
void dump(int indent, const char* class_name) const;
const NonnullRefPtrVector<VariableDeclaration>& variables() const { return m_variables; }
i32 function_length() const { return m_function_length; }
private:
FlyString m_name;