5b41233f3a
The function returns true if the function does not do anything like:
() => {}.
Change-Id: I049d7956c443b5d2bb8017a48547376f13acd0a2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3778969
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Yoshisato Yanagisawa <yyanagisawa@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82093}
134 lines
4.2 KiB
C++
134 lines
4.2 KiB
C++
// Copyright 2021 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef INCLUDE_V8_FUNCTION_H_
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#define INCLUDE_V8_FUNCTION_H_
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#include <stddef.h>
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#include <stdint.h>
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#include "v8-function-callback.h" // NOLINT(build/include_directory)
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#include "v8-local-handle.h" // NOLINT(build/include_directory)
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#include "v8-message.h" // NOLINT(build/include_directory)
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#include "v8-object.h" // NOLINT(build/include_directory)
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#include "v8-template.h" // NOLINT(build/include_directory)
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#include "v8config.h" // NOLINT(build/include_directory)
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namespace v8 {
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class Context;
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class UnboundScript;
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/**
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* A JavaScript function object (ECMA-262, 15.3).
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*/
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class V8_EXPORT Function : public Object {
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public:
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/**
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* Create a function in the current execution context
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* for a given FunctionCallback.
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*/
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static MaybeLocal<Function> New(
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Local<Context> context, FunctionCallback callback,
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Local<Value> data = Local<Value>(), int length = 0,
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ConstructorBehavior behavior = ConstructorBehavior::kAllow,
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SideEffectType side_effect_type = SideEffectType::kHasSideEffect);
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V8_WARN_UNUSED_RESULT MaybeLocal<Object> NewInstance(
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Local<Context> context, int argc, Local<Value> argv[]) const;
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V8_WARN_UNUSED_RESULT MaybeLocal<Object> NewInstance(
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Local<Context> context) const {
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return NewInstance(context, 0, nullptr);
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}
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/**
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* When side effect checks are enabled, passing kHasNoSideEffect allows the
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* constructor to be invoked without throwing. Calls made within the
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* constructor are still checked.
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*/
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V8_WARN_UNUSED_RESULT MaybeLocal<Object> NewInstanceWithSideEffectType(
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Local<Context> context, int argc, Local<Value> argv[],
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SideEffectType side_effect_type = SideEffectType::kHasSideEffect) const;
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V8_WARN_UNUSED_RESULT MaybeLocal<Value> Call(Local<Context> context,
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Local<Value> recv, int argc,
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Local<Value> argv[]);
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void SetName(Local<String> name);
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Local<Value> GetName() const;
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MaybeLocal<UnboundScript> GetUnboundScript() const;
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/**
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* Name inferred from variable or property assignment of this function.
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* Used to facilitate debugging and profiling of JavaScript code written
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* in an OO style, where many functions are anonymous but are assigned
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* to object properties.
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*/
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Local<Value> GetInferredName() const;
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/**
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* displayName if it is set, otherwise name if it is configured, otherwise
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* function name, otherwise inferred name.
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*/
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Local<Value> GetDebugName() const;
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/**
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* Returns zero based line number of function body and
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* kLineOffsetNotFound if no information available.
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*/
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int GetScriptLineNumber() const;
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/**
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* Returns zero based column number of function body and
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* kLineOffsetNotFound if no information available.
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*/
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int GetScriptColumnNumber() const;
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/**
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* Returns scriptId.
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*/
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int ScriptId() const;
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/**
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* Returns the original function if this function is bound, else returns
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* v8::Undefined.
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*/
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Local<Value> GetBoundFunction() const;
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/**
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* Calls builtin Function.prototype.toString on this function.
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* This is different from Value::ToString() that may call a user-defined
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* toString() function, and different than Object::ObjectProtoToString() which
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* always serializes "[object Function]".
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*/
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V8_WARN_UNUSED_RESULT MaybeLocal<String> FunctionProtoToString(
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Local<Context> context);
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/**
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* Returns true if the function does nothing.
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* The function returns false on error.
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* Note that this function is experimental. Embedders should not rely on
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* this existing. We may remove this function in the future.
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*/
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V8_WARN_UNUSED_RESULT bool Experimental_IsNopFunction() const;
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ScriptOrigin GetScriptOrigin() const;
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V8_INLINE static Function* Cast(Value* value) {
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#ifdef V8_ENABLE_CHECKS
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CheckCast(value);
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#endif
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return static_cast<Function*>(value);
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}
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static const int kLineOffsetNotFound;
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private:
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Function();
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static void CheckCast(Value* obj);
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};
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} // namespace v8
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#endif // INCLUDE_V8_FUNCTION_H_
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