pybind11/detail/typeid.h

0001 /*
0002     pybind11/detail/typeid.h: Compiler-independent access to type identifiers
0003
0004     Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
0005
0006     All rights reserved. Use of this source code is governed by a
0007     BSD-style license that can be found in the LICENSE file.
0008 */
0009
0010 #pragma once
0011
0012 #include <cstdio>
0013 #include <cstdlib>
0014
0015 #if defined(__GNUG__)
0016 #include <cxxabi.h>
0017 #endif
0018
0019 #include "common.h"
0020
0021 PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
0022 PYBIND11_NAMESPACE_BEGIN(detail)
0023 /// Erase all occurrences of a substring
0024 inline void erase_all(std::string &string, const std::string &search) {
0025     for (size_t pos = 0;;) {
0026         pos = string.find(search, pos);
0027         if (pos == std::string::npos) break;
0028         string.erase(pos, search.length());
0029     }
0030 }
0031
0032 PYBIND11_NOINLINE void clean_type_id(std::string &name) {
0033 #if defined(__GNUG__)
0034     int status = 0;
0035     std::unique_ptr<char, void (*)(void *)> res {
0036         abi::__cxa_demangle(name.c_str(), nullptr, nullptr, &status), std::free };
0037     if (status == 0)
0038         name = res.get();
0039 #else
0040     detail::erase_all(name, "class ");
0041     detail::erase_all(name, "struct ");
0042     detail::erase_all(name, "enum ");
0043 #endif
0044     detail::erase_all(name, "pybind11::");
0045 }
0046 PYBIND11_NAMESPACE_END(detail)
0047
0048 /// Return a string representation of a C++ type
0049 template <typename T> static std::string type_id() {
0050     std::string name(typeid(T).name());
0051     detail::clean_type_id(name);
0052     return name;
0053 }
0054
0055 PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)