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v8-function.h
// Copyright 2021 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef INCLUDE_V8_FUNCTION_H_ #define INCLUDE_V8_FUNCTION_H_ #include <stddef.h> #include <stdint.h> #include "v8-function-callback.h" // NOLINT(build/include_directory) #include "v8-local-handle.h" // NOLINT(build/include_directory) #include "v8-message.h" // NOLINT(build/include_directory) #include "v8-object.h" // NOLINT(build/include_directory) #include "v8-template.h" // NOLINT(build/include_directory) #include "v8config.h" // NOLINT(build/include_directory) namespace v8 { class Context; class UnboundScript; /** * A JavaScript function object (ECMA-262, 15.3). */ class V8_EXPORT Function : public Object { public: /** * Create a function in the current execution context * for a given FunctionCallback. */ static MaybeLocal<Function> New( Local<Context> context, FunctionCallback callback, Local<Value> data = Local<Value>(), int length = 0, ConstructorBehavior behavior = ConstructorBehavior::kAllow, SideEffectType side_effect_type = SideEffectType::kHasSideEffect); V8_WARN_UNUSED_RESULT MaybeLocal<Object> NewInstance( Local<Context> context, int argc, Local<Value> argv[]) const; V8_WARN_UNUSED_RESULT MaybeLocal<Object> NewInstance( Local<Context> context) const { return NewInstance(context, 0, nullptr); } /** * When side effect checks are enabled, passing kHasNoSideEffect allows the * constructor to be invoked without throwing. Calls made within the * constructor are still checked. */ V8_WARN_UNUSED_RESULT MaybeLocal<Object> NewInstanceWithSideEffectType( Local<Context> context, int argc, Local<Value> argv[], SideEffectType side_effect_type = SideEffectType::kHasSideEffect) const; V8_WARN_UNUSED_RESULT MaybeLocal<Value> Call(Local<Context> context, Local<Value> recv, int argc, Local<Value> argv[]); void SetName(Local<String> name); Local<Value> GetName() const; V8_DEPRECATED("No direct replacement") MaybeLocal<UnboundScript> GetUnboundScript() const; /** * Name inferred from variable or property assignment of this function. * Used to facilitate debugging and profiling of JavaScript code written * in an OO style, where many functions are anonymous but are assigned * to object properties. */ Local<Value> GetInferredName() const; /** * displayName if it is set, otherwise name if it is configured, otherwise * function name, otherwise inferred name. */ Local<Value> GetDebugName() const; /** * Returns zero based line number of function body and * kLineOffsetNotFound if no information available. */ int GetScriptLineNumber() const; /** * Returns zero based column number of function body and * kLineOffsetNotFound if no information available. */ int GetScriptColumnNumber() const; /** * Returns zero based start position (character offset) of function body and * kLineOffsetNotFound if no information available. */ int GetScriptStartPosition() const; /** * Returns scriptId. */ int ScriptId() const; /** * Returns the original function if this function is bound, else returns * v8::Undefined. */ Local<Value> GetBoundFunction() const; /** * Calls builtin Function.prototype.toString on this function. * This is different from Value::ToString() that may call a user-defined * toString() function, and different than Object::ObjectProtoToString() which * always serializes "[object Function]". */ V8_WARN_UNUSED_RESULT MaybeLocal<String> FunctionProtoToString( Local<Context> context); /** * Returns true if the function does nothing. * The function returns false on error. * Note that this function is experimental. Embedders should not rely on * this existing. We may remove this function in the future. */ V8_WARN_UNUSED_RESULT bool Experimental_IsNopFunction() const; ScriptOrigin GetScriptOrigin() const; V8_INLINE static Function* Cast(Value* value) { #ifdef V8_ENABLE_CHECKS CheckCast(value); #endif return static_cast<Function*>(value); } static const int kLineOffsetNotFound; private: Function(); static void CheckCast(Value* obj); }; } // namespace v8 #endif // INCLUDE_V8_FUNCTION_H_