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better showcase value::to_number

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This commit is contained in:
Dmitry Arkhipov
2022-05-23 20:48:57 +03:00
parent ba54d89369
commit b8d831b373
2 changed files with 10 additions and 18 deletions
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23
test/doc_using_numbers.cpp
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@@ -75,15 +75,8 @@ if(double* d = jv.if_double())
//----------------------------------------------------------
{
//[doc_using_numbers_3
struct convert_int64
{
value jv;
operator int() const
{
return value_to< int >( this->jv );
}
};
value jv = 1;
assert( jv.to_number< int >() == 1 );
//]
}
//----------------------------------------------------------
@@ -95,30 +88,30 @@ try
assert( jv1.is_int64() );
// ok, identity conversion
std::int64_t r1 = value_to< std::int64_t >( jv1 );
std::int64_t r1 = jv1.to_number< std::int64_t >( );
// loss of data, throws system_error
char r2 = value_to< char >( jv1 );
char r2 = jv1.to_number< char >();
// ok, no loss of data
double r3 = value_to< double >( jv1 );
double r3 = jv1.to_number< double >();
value jv2 = 1.23;
assert( jv1.is_double() );
// ok, same as static_cast<float>( jv2.get_double() )
float r4 = value_to< float >( jv2 );
float r4 = jv2.to_number< float >();
// not exact, throws system_error
int r5 = value_to< int >( jv2 );
int r5 = jv2.to_number< int >();
value jv3 = {1, 2, 3};
assert( ! jv3.is_number() );
// not a number, throws system_error
int r6 = value_to< int >( jv3 );
int r6 = jv3.to_number< int >();
//]
}
catch(...)