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//===- TypeName.h -----------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_TYPENAME_H
#define LLVM_SUPPORT_TYPENAME_H
#include "llvm/ADT/StringRef.h"
namespace llvm {
/// We provide a function which tries to compute the (demangled) name of a type
/// statically.
///
/// This routine may fail on some platforms or for particularly unusual types.
/// Do not use it for anything other than logging and debugging aids. It isn't
/// portable or dependendable in any real sense.
///
/// The returned StringRef will point into a static storage duration string.
/// However, it may not be null terminated and may be some strangely aligned
/// inner substring of a larger string.
template <typename DesiredTypeName>
inline StringRef getTypeName() {
#if defined(__clang__) || defined(__GNUC__)
StringRef Name = __PRETTY_FUNCTION__;
StringRef Key = "DesiredTypeName = ";
Name = Name.substr(Name.find(Key));
assert(!Name.empty() && "Unable to find the template parameter!");
Name = Name.drop_front(Key.size());
assert(Name.endswith("]") && "Name doesn't end in the substitution key!");
return Name.drop_back(1);
#elif defined(_MSC_VER)
StringRef Name = __FUNCSIG__;
StringRef Key = "getTypeName<";
Name = Name.substr(Name.find(Key));
assert(!Name.empty() && "Unable to find the function name!");
Name = Name.drop_front(Key.size());
for (StringRef Prefix : {"class ", "struct ", "union ", "enum "})
if (Name.startswith(Prefix)) {
Name = Name.drop_front(Prefix.size());
break;
}
auto AnglePos = Name.rfind('>');
assert(AnglePos != StringRef::npos && "Unable to find the closing '>'!");
return Name.substr(0, AnglePos);
#else
// No known technique for statically extracting a type name on this compiler.
// We return a string that is unlikely to look like any type in LLVM.
return "UNKNOWN_TYPE";
#endif
}
}
#endif
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