I am using Intel Parallel XE (R) C++ Intel(R) 64 Compiler for applications running on Intel(R) 64, Version 19.1.0.166 Build 20191121 and Visual Studios Professional 2019 (MSVC\14.27.29110)
here is a simple sample code which gives the error while compilation:
#include<iostream>
#include<map>
int main()
{
std::cout<<"Hello Mallasarj , this is Intel compiler"<<std::endl;
std::map<int, int> mp;
mp.insert({ 2, 30 });
return 1;
}
Errors report while compilation :
C:\Users\z0046wdt\Desktop>icl /EHsc Intel.cpp /Feintel.exe
Intel(R) C++ Intel(R) 64 Compiler for applications running on Intel(R) 64, Version 19.1.0.166 Build 20191121
Copyright (C) 1985-2019 Intel Corporation. All rights reserved.
Intel.cpp
icl: NOTE: The evaluation period for this product ends on 14-nov-2020 UTC.
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(22): error: expected a "{"
_STD_BEGIN
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(25): error: a template declaration is not allowed here
template <bool _Same, class _Dest, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(26): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_conditional_explicit_v0 = false;
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(28): error: a template declaration is not allowed here
template <class... _Dests, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(29): error: _Tuple_conditional_explicit_v0 is not a template
_INLINE_VAR constexpr bool _Tuple_conditional_explicit_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(29): error: identifier "tuple" is undefined
_INLINE_VAR constexpr bool _Tuple_conditional_explicit_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(29): error: type name is not allowed
_INLINE_VAR constexpr bool _Tuple_conditional_explicit_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(29): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_conditional_explicit_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(29): error: expected a ";"
_INLINE_VAR constexpr bool _Tuple_conditional_explicit_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(32): error: a template declaration is not allowed here
template <class _Dest, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(33): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_conditional_explicit_v =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(64): error: a template declaration is not allowed here
template <bool _Same, class _Dest, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(65): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_constructible_v0 = false;
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(67): error: a template declaration is not allowed here
template <class... _Dests, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(68): error: _Tuple_constructible_v0 is not a template
_INLINE_VAR constexpr bool _Tuple_constructible_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(68): error: identifier "tuple" is undefined
_INLINE_VAR constexpr bool _Tuple_constructible_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(68): error: type name is not allowed
_INLINE_VAR constexpr bool _Tuple_constructible_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(68): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_constructible_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(68): error: expected a ";"
_INLINE_VAR constexpr bool _Tuple_constructible_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(71): error: a template declaration is not allowed here
template <class _Dest, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(72): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_constructible_v =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(75): error: a template declaration is not allowed here
template <class _Dest, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(79): error: a template declaration is not allowed here
template <bool _Same, class _Dest, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(80): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_nothrow_constructible_v0 = false;
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(82): error: a template declaration is not allowed here
template <class... _Dests, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(83): error: _Tuple_nothrow_constructible_v0 is not a template
_INLINE_VAR constexpr bool _Tuple_nothrow_constructible_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(83): error: identifier "tuple" is undefined
_INLINE_VAR constexpr bool _Tuple_nothrow_constructible_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(83): error: type name is not allowed
_INLINE_VAR constexpr bool _Tuple_nothrow_constructible_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(83): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_nothrow_constructible_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(83): error: expected a ";"
_INLINE_VAR constexpr bool _Tuple_nothrow_constructible_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(86): error: a template declaration is not allowed here
template <class _Dest, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(87): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_nothrow_constructible_v =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(91): error: a template declaration is not allowed here
template <bool _Same, class _Dest, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(92): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_assignable_v0 = false;
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(94): error: a template declaration is not allowed here
template <class... _Dests, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(95): error: _Tuple_assignable_v0 is not a template
_INLINE_VAR constexpr bool _Tuple_assignable_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(95): error: identifier "tuple" is undefined
_INLINE_VAR constexpr bool _Tuple_assignable_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(95): error: type name is not allowed
_INLINE_VAR constexpr bool _Tuple_assignable_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(95): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_assignable_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(95): error: expected a ";"
_INLINE_VAR constexpr bool _Tuple_assignable_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(98): error: a template declaration is not allowed here
template <class _Dest, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(99): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_assignable_v =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(102): error: a template declaration is not allowed here
template <class _Dest, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(106): error: a template declaration is not allowed here
template <bool _Same, class _Dest, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(107): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_nothrow_assignable_v0 = false;
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(109): error: a template declaration is not allowed here
template <class... _Dests, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(110): error: _Tuple_nothrow_assignable_v0 is not a template
_INLINE_VAR constexpr bool _Tuple_nothrow_assignable_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(110): error: identifier "tuple" is undefined
_INLINE_VAR constexpr bool _Tuple_nothrow_assignable_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(110): error: type name is not allowed
_INLINE_VAR constexpr bool _Tuple_nothrow_assignable_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(110): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_nothrow_assignable_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(110): error: expected a ";"
_INLINE_VAR constexpr bool _Tuple_nothrow_assignable_v0<true, tuple<_Dests...>, _Srcs...> =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(113): error: a template declaration is not allowed here
template <class _Dest, class... _Srcs>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(114): error: "constexpr" is not valid here
_INLINE_VAR constexpr bool _Tuple_nothrow_assignable_v =
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(119): error: a template declaration is not allowed here
template <class _Myself, class... _Other>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(122): error: a template declaration is not allowed here
template <class _This, class _Uty>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(123): error: identifier "tuple" is undefined
struct _Tuple_convert_copy_val<tuple<_This>, _Uty>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(123): error: type name is not allowed
struct _Tuple_convert_copy_val<tuple<_This>, _Uty>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(123): error: _Tuple_convert_copy_val is not a template
struct _Tuple_convert_copy_val<tuple<_This>, _Uty>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(123): error: expected a ";"
struct _Tuple_convert_copy_val<tuple<_This>, _Uty>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(129): error: a template declaration is not allowed here
template <class _Myself, class... _Other>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(132): error: a template declaration is not allowed here
template <class _This, class _Uty>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(133): error: identifier "tuple" is undefined
struct _Tuple_convert_move_val<tuple<_This>, _Uty>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(133): error: type name is not allowed
struct _Tuple_convert_move_val<tuple<_This>, _Uty>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(133): error: _Tuple_convert_move_val is not a template
struct _Tuple_convert_move_val<tuple<_This>, _Uty>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(133): error: expected a ";"
struct _Tuple_convert_move_val<tuple<_This>, _Uty>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(139): error: a template declaration is not allowed here
template <class _Myself, class _This2, class... _Rest2>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(142): error: a template declaration is not allowed here
template <class _Myself, class _This2>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(143): error: a template argument list is not allowed in a declaration of a primary template
struct _Tuple_perfect_val<_Myself, _This2>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(148): error: a template declaration is not allowed here
template <class _Ty>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(158): error: a template declaration is not allowed here
template <class _Ty>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(201): error: a template declaration is not allowed here
template <class... _Types>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(204): error: a template declaration is not allowed here
template <>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(205): error: tuple is not a template
class tuple<> { // empty tuple
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(209): error: function "<error>::tuple" is not a type name
constexpr tuple(const tuple&) noexcept /* strengthened */ {} // TRANSITION, ABI: should be defaulted
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(211): error: a template declaration is not allowed here
template <class _Alloc>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(212): error: identifier "allocator_arg_t" is undefined
tuple(allocator_arg_t, const _Alloc&) noexcept /* strengthened */ {}
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(214): error: a template declaration is not allowed here
template <class _Alloc>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(215): error: identifier "allocator_arg_t" is undefined
tuple(allocator_arg_t, const _Alloc&, const tuple&) noexcept /* strengthened */ {}
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(215): error: overloaded function "<error>::tuple" is not a type name
tuple(allocator_arg_t, const _Alloc&, const tuple&) noexcept /* strengthened */ {}
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(217): error: enable_if_t is not a template
template <class _Tag, enable_if_t<is_same_v<_Tag, _Exact_args_t>, int> = 0>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(217): error: identifier "is_same_v" is undefined
template <class _Tag, enable_if_t<is_same_v<_Tag, _Exact_args_t>, int> = 0>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(217): error: type name is not allowed
template <class _Tag, enable_if_t<is_same_v<_Tag, _Exact_args_t>, int> = 0>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(217): error: a template declaration is not allowed here
template <class _Tag, enable_if_t<is_same_v<_Tag, _Exact_args_t>, int> = 0>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(217): error: expected a declaration
template <class _Tag, enable_if_t<is_same_v<_Tag, _Exact_args_t>, int> = 0>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(217): error: expected a ";"
template <class _Tag, enable_if_t<is_same_v<_Tag, _Exact_args_t>, int> = 0>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(225): error: overloaded function "<error>::tuple" is not a type name
void swap(tuple&) noexcept {}
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(227): error: overloaded function "<error>::tuple" is not a type name
constexpr bool _Equals(const tuple&) const noexcept {
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(231): error: overloaded function "<error>::tuple" is not a type name
constexpr bool _Less(const tuple&) const noexcept {
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(236): error: a template declaration is not allowed here
template <class _This, class... _Rest>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(237): error: a template argument list is not allowed in a declaration of a primary template
class tuple<_This, _Rest...> : private tuple<_Rest...> { // recursive tuple definition
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(716): error: a template declaration is not allowed here
template <class... _Types1, class... _Types2>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(717): error: tuple is not a template
_NODISCARD constexpr bool operator==(const tuple<_Types1...>& _Left, const tuple<_Types2...>& _Right) {
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(717): error: tuple is not a template
_NODISCARD constexpr bool operator==(const tuple<_Types1...>& _Left, const tuple<_Types2...>& _Right) {
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(722): error: a template declaration is not allowed here
template <class... _Types1, class... _Types2>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(723): error: tuple is not a template
_NODISCARD constexpr bool operator!=(const tuple<_Types1...>& _Left, const tuple<_Types2...>& _Right) {
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(723): error: tuple is not a template
_NODISCARD constexpr bool operator!=(const tuple<_Types1...>& _Left, const tuple<_Types2...>& _Right) {
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(727): error: a template declaration is not allowed here
template <class... _Types1, class... _Types2>
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(728): error: tuple is not a template
_NODISCARD constexpr bool operator<(const tuple<_Types1...>& _Left, const tuple<_Types2...>& _Right) {
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(728): error: tuple is not a template
_NODISCARD constexpr bool operator<(const tuple<_Types1...>& _Left, const tuple<_Types2...>& _Right) {
^
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.27.29110\include\tuple(733): error: a template declaration is not allowed here
template <class... _Types1, class... _Types2>
^
compilation aborted for Intel.cpp (code 4)
C:\Users\z0046wdt\Desktop>icl /EHsc Intel.cpp /Feintel.exe
Same fails if I include <map> or <set> . Can anyone please suggest what is going wrong?