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Use template variables for our trait-likes in Clara

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This commit is contained in:
Martin Hořeňovský
2025-07-15 11:49:39 +02:00
parent 050e14dce0
commit b9c018b38a
8 changed files with 92 additions and 94 deletions
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18
src/catch2/internal/catch_clara.hpp
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@@ -66,15 +66,13 @@ namespace Catch {
};
template <typename F, typename = void>
struct is_unary_function : std::false_type {};
static constexpr bool is_unary_function_v = false;
template <typename F>
struct is_unary_function<
static constexpr bool is_unary_function_v<
F,
Catch::Detail::void_t<decltype(
std::declval<F>()( fake_arg() ) )
>
> : std::true_type {};
Catch::Detail::void_t<decltype( std::declval<F>()(
fake_arg() ) )>> = true;
// Traits for extracting arg and return type of lambdas (for single
// argument lambdas)
@@ -507,14 +505,14 @@ namespace Catch {
template <typename T,
typename = typename std::enable_if_t<
!Detail::is_unary_function<T>::value>>
!Detail::is_unary_function_v<T>>>
ParserRefImpl( T& ref, StringRef hint ):
m_ref( std::make_shared<BoundValueRef<T>>( ref ) ),
m_hint( hint ) {}
template <typename LambdaT,
typename = typename std::enable_if_t<
Detail::is_unary_function<LambdaT>::value>>
Detail::is_unary_function_v<LambdaT>>>
ParserRefImpl( LambdaT const& ref, StringRef hint ):
m_ref( std::make_shared<BoundLambda<LambdaT>>( ref ) ),
m_hint( hint ) {}
@@ -581,7 +579,7 @@ namespace Catch {
template <typename LambdaT,
typename = typename std::enable_if_t<
Detail::is_unary_function<LambdaT>::value>>
Detail::is_unary_function_v<LambdaT>>>
Opt( LambdaT const& ref, StringRef hint ):
ParserRefImpl( ref, hint ) {}
@@ -591,7 +589,7 @@ namespace Catch {
template <typename T,
typename = typename std::enable_if_t<
!Detail::is_unary_function<T>::value>>
!Detail::is_unary_function_v<T>>>
Opt( T& ref, StringRef hint ):
ParserRefImpl( ref, hint ) {}