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v8-function.h4.8 KB · 149 lines
// 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 Location;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(v8::Isolate* isolate,                                               Local<Context> context,                                               Local<Value> recv, int argc,                                               Local<Value> argv[]);  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;   /**   * 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 line and column number of function body, else returns   * {-1, -1}.   */  Location GetScriptLocation() 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_