[BUG] Can't declare constexpr variable of pointer type

[JohelEGP]

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Title: Can't declare constexpr variable of pointer type.

Minimal reproducer (https://cpp2.godbolt.org/z/voMavfKhh):

main: () = {
  _: * const char == "abc";
}

Commands:

cppfront main.cpp2
clang++18 -std=c++23 -stdlib=libc++ -lc++abi -pedantic-errors -Wall -Wextra -Wconversion -Werror=unused-result -I . main.cpp

Expected result: constexpr char const* _ = "abc"; or std::type_identity_t<char const*> constexpr _ = "abc";.

Actual result and error: char const* constexpr _ = "abc";.

Cpp2 lowered to Cpp1:

//=== Cpp2 type declarations ====================================================


#include "cpp2util.h"



//=== Cpp2 type definitions and function declarations ===========================

auto main() -> int;

//=== Cpp2 function definitions =================================================

auto main() -> int{
  char const* constexpr _ = "abc";
}

Output:

main.cpp2:2:15: error: expected unqualified-id
    2 |   char const* constexpr _ = "abc";
      |               ^
1 error generated.

See also:

• #525.
• #724.