[cfe-dev] Matcher working in clang-query, but not in LibTooling

[Hartogs Siegfried via cfe-dev]

A minimal code sample to trigger the error:

#include "clang/ASTMatchers/ASTMatchers.h"

using namespace clang::ast_matchers;

int main(int argc, char** argv){
    auto m = cxxRecordDecl(has(unless(cxxRecordDecl())));
    return 0;

}

Best, Siegfried

On 16Nov, 2020, at 16:57, Hartogs Siegfried <hartogss at student.ethz.ch<mailto:hartogss at student.ethz.ch>> wrote:

Hello everyone,

Why is it that the following matcher

cxxRecordDecl(has(unless(cxxRecordDecl())))

works in clang-query, but when copied to to a .cpp file, it won't compile the matcher:

../lib/UsingAnalysis.cpp:46:29: error: no matching function for call to object of type 'const internal::ArgumentAdaptingMatcherFunc<internal::HasMatcher>'
    auto m = cxxRecordDecl(has(unless(cxxRecordDecl())));
                           ^~~
/usr/local/include/clang/ASTMatchers/ASTMatchersInternal.h:1183:3: note: candidate template ignored: could not match 'Matcher' against 'VariadicOperatorMatcher'
  operator()(const Matcher<T> &InnerMatcher) const {

Tried on macOS 10.13 & Ubuntu 20.04 with LLVM 11.0.0.

Best,
Siegfried

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