Mark headers as C++ code with vim filetype

include/gsl/gsl

@@ -144,3 +144,5 @@ struct hash<gsl::not_null<T>>
 #endif // defined(_MSC_VER) && _MSC_VER < 1910
 
 #endif // GSL_GSL_H
+
+// vim: set filetype=cpp:

include/gsl/gsl_algorithm

@@ -57,3 +57,5 @@ void copy(span<SrcElementType, SrcExtent> src, span<DestElementType, DestExtent>
 #endif // _MSC_VER
 
 #endif // GSL_ALGORITHM_H
+
+// vim: set filetype=cpp:

include/gsl/gsl_assert

@@ -83,3 +83,5 @@ struct fail_fast : public std::runtime_error
 #endif
 
 #endif // GSL_CONTRACTS_H
+
+// vim: set filetype=cpp:

include/gsl/gsl_byte

@@ -153,3 +153,5 @@ inline constexpr byte to_byte() noexcept
 #endif // _MSC_VER
 
 #endif // GSL_BYTE_H
+
+// vim: set filetype=cpp:

include/gsl/gsl_util

@@ -173,3 +173,5 @@ inline constexpr const T& at(std::initializer_list<T> cont, std::ptrdiff_t index
 #endif // _MSC_VER
 
 #endif // GSL_UTIL_H
+
+// vim: set filetype=cpp:

include/gsl/multi_span

@@ -2219,3 +2219,5 @@ general_span_iterator<Span> operator+(typename general_span_iterator<Span>::diff
 #endif // _MSC_VER
 
 #endif // GSL_MULTI_SPAN_H
+
+// vim: set filetype=cpp:

include/gsl/span

@@ -699,3 +699,5 @@ inline constexpr ElementType& at(const span<ElementType, Extent>& s, std::ptrdif
 #endif // _MSC_VER
 
 #endif // GSL_SPAN_H
+
+// vim: set filetype=cpp:

include/gsl/string_span

@@ -850,3 +850,5 @@ bool operator>=(const T& one, gsl::basic_string_span<CharT, Extent> other) GSL_N
 #endif // _MSC_VER
 
 #endif // GSL_STRING_SPAN_H
+
+// vim: set filetype=cpp: