[cfe-dev] bool type is represented as "_Bool" in the AST

[Stephen Kelly via cfe-dev]

I noticed that too recently:


$ cat f.cmds

set print-matcher true

m functionDecl(returns(asString("int")))

m functionDecl(returns(asString("bool")))

m functionDecl(returns(asString("_Bool")))
$ cat foo.cpp

int foo();

bool bar();
$ clang-query -f f.cmds foo.cpp -- -std=c++17

   Matcher: functionDecl(returns(asString("int")))
   ===============================================

Match #1:

foo.cpp:2:1: note: "root" binds here
int foo();
^~~~~~~~~

1 match.

   Matcher: functionDecl(returns(asString("bool")))
   ================================================
0 matches.

   Matcher: functionDecl(returns(asString("_Bool")))
   =================================================

Match #1:

foo.cpp:4:1: note: "root" binds here
bool bar();
^~~~~~~~~~

1 match.

$


I don't know any more than that.

Thanks,

Stephen.

On 23/07/2019 15:47, Pradeep Kumar via cfe-dev wrote:
> Dear Clang-developer community,
>      I am using libTooling to query information about the source. While 
> querying the string representation of the bool type, I get "_Bool" 
> string. I got the string from QualType::getAsString(). Should I be using 
> another function to query the actual type or is it an expected behavior?
> 
>      I don't get _Bool when dumping the ast except when I dump the 
> QualType Node.
> 
> clang Version: 9.0
> LLVM Version: 9.0
> 
> Regards,
> Pradeep
> 
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