C++ Different mangling (Itanium ABI)

diff_cpp_mangle.md

Testing

• C++20 (g++ & clang++)
• Circle (safe-cpp)
• D (extern(C++))
• Rust (legacy)

url: https://godbolt.org/z/P9EMxWveK

based on: llvm/llvm-project#62765

Result

• gnu: _ZNK1n1S3getIbEENSt9enable_ifIXsrSt11is_integralIT_E5valueEN4llvm8OptionalIS4_EEE4typeENS6_9StringRefE
• clang: _ZNK1n1S3getIbEENSt9enable_ifIXsr3std11is_integralIT_EE5valueEN4llvm8OptionalIS3_EEE4typeENS4_9StringRefE
• circle: _ZNK1n1S3getIbEESt11enable_if_tIXEN4llvm8OptionalIT_EEENS3_9StringRefE
• ldc: _ZNK1n1S3getIbEEN4llvm8OptionalIbEENS2_9StringRefE
• gdc: _ZNK1n1S3getIbEEN4llvm8OptionalIbEENS2_9StringRefE
• dmd: _ZNK1n1S3getIbEEN4llvm8OptionalIbEENS2_9StringRefE
• rustc: _ZN7example1n1S3get17h871c28d6645bba16E

Demangling

Note

Circle use custom-mangling, not working in c++filt or llvm-cxxfilt(upstream).

C++/GNU

$ c++filt _ZNK1n1S3getIbEENSt9enable_ifIXsrSt11is_integralIT_E5valueEN4llvm8OptionalIS4_EEE4typeENS6_9StringRefE
std::enable_if<std::is_integral<bool>::value, llvm::Optional<bool> >::type n::S::get<bool>(llvm::StringRef) const

C++/clang

$ c++filt _ZNK1n1S3getIbEENSt9enable_ifIXsr3std11is_integralIT_EE5valueEN4llvm8OptionalIS3_EEE4typeENS4_9StringRefE
std::enable_if<std::is_integral<bool>::value, llvm::Optional<bool> >::type n::S::get<bool>(llvm::StringRef) const

D

$ c++filt _ZNK1n1S3getIbEEN4llvm8OptionalIbEENS2_9StringRefE
llvm::Optional<bool> n::S::get<bool>(llvm::StringRef) const

Rust

$ c++filt _ZN7example1n1S3get17h871c28d6645bba16E           
example::n::S::get::h871c28d6645bba16