name : v8-source-location.h // Copyright 2020 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_SOURCE_LOCATION_H_ #define INCLUDE_SOURCE_LOCATION_H_ #include <cstddef> #include <string> #include "v8config.h" // NOLINT(build/include_directory) #if defined(__has_builtin) #define V8_SUPPORTS_SOURCE_LOCATION \ (__has_builtin(__builtin_FUNCTION) && __has_builtin(__builtin_FILE) && \ __has_builtin(__builtin_LINE)) // NOLINT #elif defined(V8_CC_GNU) && __GNUC__ >= 7 #define V8_SUPPORTS_SOURCE_LOCATION 1 #elif defined(V8_CC_INTEL) && __ICC >= 1800 #define V8_SUPPORTS_SOURCE_LOCATION 1 #else #define V8_SUPPORTS_SOURCE_LOCATION 0 #endif namespace v8 { /** * Encapsulates source location information. Mimics C++20's * `std::source_location`. */ class V8_EXPORT SourceLocation final { public: /** * Construct source location information corresponding to the location of the * call site. */ #if V8_SUPPORTS_SOURCE_LOCATION static constexpr SourceLocation Current( const char* function = __builtin_FUNCTION(), const char* file = __builtin_FILE(), size_t line = __builtin_LINE()) { return SourceLocation(function, file, line); } #else static constexpr SourceLocation Current() { return SourceLocation(); } #endif // V8_SUPPORTS_SOURCE_LOCATION /** * Constructs unspecified source location information. */ constexpr SourceLocation() = default; /** * Returns the name of the function associated with the position represented * by this object, if any. * * \returns the function name as cstring. */ constexpr const char* Function() const { return function_; } /** * Returns the name of the current source file represented by this object. * * \returns the file name as cstring. */ constexpr const char* FileName() const { return file_; } /** * Returns the line number represented by this object. * * \returns the line number. */ constexpr size_t Line() const { return line_; } /** * Returns a human-readable string representing this object. * * \returns a human-readable string representing source location information. */ std::string ToString() const; private: constexpr SourceLocation(const char* function, const char* file, size_t line) : function_(function), file_(file), line_(line) {} const char* function_ = nullptr; const char* file_ = nullptr; size_t line_ = 0u; }; } // namespace v8 #endif // INCLUDE_SOURCE_LOCATION_H_