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From: "paulotorrens at gnu dot org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/53586] Internal compiler errors on cp/pt.c:12077 and expr.c:9147
Date: Wed, 06 Jun 2012 18:43:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53586

--- Comment #2 from Paulo Torrens <paulotorrens at gnu dot org> 2012-06-06 18:43:13 UTC ---
(In reply to comment #1)
> What happens if you use decltype instead of typeof ?



template<typename T> auto ptr2bitmap(T *bitmap, int width, int depth = 3) ->
decltype(decltype(unsigned char[depth])[width]) *{
  return bitmap;
};

int main() {
  void *x;
  auto a = ptr2bitmap(x, 100);
};


test.cpp:2:10: error: expected primary-expression before 'decltype'
test.cpp:2:10: error: expected ')' before 'decltype'
test.cpp:2:1: error: expected type-specifier before 'decltype'
test.cpp:2:1: error: expected initializer before 'decltype'







And without decltype and typeof at all:


template<typename T> auto ptr2bitmap(T *bitmap, int width, int depth = 3) ->
unsigned char[depth][width] *{
  return bitmap;
};

int main() {
  void *x;
  auto a = ptr2bitmap(x, 100);
};




test.cpp:2:15: error: use of parameter 'depth' outside function body
test.cpp:2:22: error: use of parameter 'width' outside function body
test.cpp:2:29: error: expected initializer before '*' token