GCC 4.5 の半分は C++03 へのやさしさでできています

When printing the name of a class template specialization, G++ will now omit any template arguments which match the default template argument for that parameter. This behavior (and the pretty-printing of function template specializations as template signature and arguments) can be disabled with the -fno-pretty-templates option.

http://gcc.gnu.org/gcc-4.5/changes.html

この文章を読んで衝撃を受ける奴はよく訓練された C++er だ．ホント， C++ は地獄だぜ！ フゥハハハーハァー！

#include <string>
#include <map>

int main()
{
  std::map<std::string, std::string> m = 1;
}

GCC 4.5 で -fno-pretty-templates オプションを付けたときのコンパイルエラー． (従来の g++ と同じ挙動)

test.cpp: In function ‘int main()’:
test.cpp:6:42: error: conversion from ‘int’ to non-scalar type ‘std::map, std::allocator >, std::basic_string, std::allocator >, std::less, std::allocator > >, std::allocator, std::allocator >, std::basic_string, std::allocator > > > >’ requested

GCC 4.5 のデフォルトのコンパイルエラー．

test.cpp: In function ‘int main()’:
test.cpp:6:42: error: conversion from ‘int’ to non-scalar type ‘std::map, std::basic_string >’ requested