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Move-enable Catch::optional

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This avoids copies in couple places through Catch2, e.g. reporter
spec handling, and moving around `AssertionResult` in `RunContext`.
This commit is contained in:
Martin Hořeňovský
2023-05-06 14:31:29 +02:00
parent d84777c9cb
commit c57b5cdf43
2 changed files with 76 additions and 18 deletions
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53
src/catch2/internal/catch_optional.hpp
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@@ -8,6 +8,8 @@
#ifndef CATCH_OPTIONAL_HPP_INCLUDED
#define CATCH_OPTIONAL_HPP_INCLUDED
#include <catch2/internal/catch_move_and_forward.hpp>
#include <cassert>
namespace Catch {
@@ -16,35 +18,50 @@ namespace Catch {
template<typename T>
class Optional {
public:
Optional() : nullableValue( nullptr ) {}
Optional( T const& _value )
: nullableValue( new( storage ) T( _value ) )
{}
Optional( Optional const& _other )
: nullableValue( _other ? new( storage ) T( *_other ) : nullptr )
{}
Optional(): nullableValue( nullptr ) {}
~Optional() { reset(); }
~Optional() {
Optional( T const& _value ):
nullableValue( new ( storage ) T( _value ) ) {}
Optional( T&& _value ):
nullableValue( new ( storage ) T( CATCH_MOVE( _value ) ) ) {}
Optional& operator=( T const& _value ) {
reset();
nullableValue = new ( storage ) T( _value );
return *this;
}
Optional& operator=( T&& _value ) {
reset();
nullableValue = new ( storage ) T( CATCH_MOVE( _value ) );
return *this;
}
Optional& operator= ( Optional const& _other ) {
if( &_other != this ) {
Optional( Optional const& _other ):
nullableValue( _other ? new ( storage ) T( *_other ) : nullptr ) {}
Optional( Optional&& _other ):
nullableValue( _other ? new ( storage ) T( CATCH_MOVE( *_other ) )
: nullptr ) {}
Optional& operator=( Optional const& _other ) {
if ( &_other != this ) {
reset();
if( _other )
nullableValue = new( storage ) T( *_other );
if ( _other ) { nullableValue = new ( storage ) T( *_other ); }
}
return *this;
}
Optional& operator = ( T const& _value ) {
reset();
nullableValue = new( storage ) T( _value );
Optional& operator=( Optional&& _other ) {
if ( &_other != this ) {
reset();
if ( _other ) {
nullableValue = new ( storage ) T( CATCH_MOVE( *_other ) );
}
}
return *this;
}
void reset() {
if( nullableValue )
nullableValue->~T();
if ( nullableValue ) { nullableValue->~T(); }
nullableValue = nullptr;
}
@@ -91,7 +108,7 @@ namespace Catch {
}
private:
T *nullableValue;
T* nullableValue;
alignas(alignof(T)) char storage[sizeof(T)];
};