http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53139
Bug #: 53139
Summary: internal compiler error: expected a type, got
'#'tree_vec' not supported by dump_expr#<expression
error>'
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: [email protected]
ReportedBy: [email protected]
This code:
// Compile: g++ -std=c++11 test.cpp
// Compile: clang++ -std=c++11 test.cpp
//#include <string>
//#include <iostream>
namespace my_types
{
struct nil {};
//original type
template <typename T, typename U>
struct chain
{
typedef T first_type;
typedef U second_type;
};
}
template <template <typename, typename> class Chain, typename Nil>
struct chain_generator
{
template <typename T, typename... Args>
struct gen
{
private:
template <std::size_t S = sizeof...(Args), typename Dummy = void>
struct inner
{
typedef Chain<T, typename gen<Args...>::type > type;
};
template <typename Dummy>
struct inner<0, Dummy>
{
typedef Chain<T, Nil> type;
};
public:
typedef typename inner<sizeof...(Args)>::type type;
};
};
int main( /* int argc, char* argv[] */ )
{
using my_types::chain;
using my_types::nil;
typedef chain<int, chain<float, chain<char, nil>>> t0;
typedef chain_generator<chain, nil> my_gen;
typedef my_gen::gen<int, float, char>::type t1;
return 0;
}
when compiling with gcc-4.7.0 produce this errors:
> source.cpp:29:22: error: 'size_t' has not been declared
> source.cpp: In instantiation of 'struct chain_generator<my_types::chain,
> my_types::nil>::gen<int, float, char>::inner<2, void>':
> source.cpp:41:53: required from 'struct chain_generator<my_types::chain,
> my_types::nil>::gen<int, float, char>'
> source.cpp:52:41: required from here
> source.cpp:32:57: error: type/value mismatch at argument 1 in template
> parameter list for 'template<template<class, class> class Chain, class Nil>
> template<class T, class ... Args> struct chain_generator<Chain, Nil>::gen'
> source.cpp:32:57: error: expected a type, got '#'tree_vec' not supported by
> dump_expr#<expression error>'
> source.cpp:32:57: error: type/value mismatch at argument 2 in template
> parameter list for 'template<template<class, class> class Chain, class Nil>
> template<class T, class ... Args> struct chain_generator<Chain, Nil>::gen'
> source.cpp:32:57: error: expected a type, got '#'tree_vec' not supported by
> dump_expr#<expression error>'
when compiling with gcc-4.6.3 produce this errors:
> source.cpp:30:13: error: 'size_t' has not been declared
> source.cpp:33:41: sorry, unimplemented: cannot expand 'Args ...' into a
> fixed-length argument list
> source.cpp:33:49: error: template argument 2 is invalid
> source.cpp:33:51: error: expected '::' before 'type'
with clang this code compiled successfully.
gcc-4.7.0 test-drive:
http://liveworkspace.org/code/6287f6a38362af545712f43a56851a0b
