bool as_value::abstract_equality_comparison( const as_value & first, const as_value & second )
{
if (first.type_of() == second.type_of())
{
if( first.is_undefined() ) return true;
if( first.is_null() ) return true;
if( first.is_number() )
{
double first_number = first.to_number();
double second_number = second.to_number();
if( first_number == get_nan() || second_number == get_nan() )
{
return false;
}
return first_number == second_number;
}
else if( first.is_string() )
{
return first.to_tu_string() == second.to_tu_string();
}
else if( first.is_bool() )
{
return first.to_bool() == second.to_bool();
}
//13.Return true if x and y refer to the same object or if they refer to objects joined to each other (see
//13.1.2). Otherwise, return false.
// TODO: treat joined object
return first.to_object() == second.to_object();
}
else
{
if( first.is_null() && second.is_undefined() ) return true;
if( second.is_null() && first.is_undefined() ) return true;
if( ( first.is_number() && second.is_string() )
|| (second.is_number() && first.is_string() ) )
{
return first.to_number() == second.to_number();
}
if( first.is_bool() || second.is_bool() ) return first.to_number() == second.to_number();
// TODO:20.If Type(x) is either String or Number and Type(y) is Object,
//return the result of the comparison x == ToPrimitive(y).
//21.If Type(x) is Object and Type(y) is either String or Number,
//return the result of the comparison ToPrimitive(x) == y.
return false;
}
}
bool as_value::operator==(const as_value& v) const
// Return true if operands are equal.
{
// types don't match
if (m_type != PROPERTY && v.m_type != PROPERTY && m_type != v.m_type)
{
if ((is_undefined() && v.is_null()) || (is_null() && v.is_undefined()))
{
return true;
}
return false;
}
switch (m_type)
{
case UNDEFINED:
return v.m_type == UNDEFINED;
case STRING:
return m_string == v.to_tu_string();
case NUMBER:
return m_number == v.to_number();
case BOOLEAN:
return m_bool == v.to_bool();
case OBJECT:
return m_object.get() == v.to_object();
case PROPERTY:
{
as_value prop;
get_property(&prop);
return prop == v;
}
default:
assert(0);
return false;
}
}
//ECMA-262 11.8.5
as_value as_value::abstract_relational_comparison( const as_value & first, const as_value & second )
{
return as_value( first.to_number() < second.to_number() );
// todo
}
void operator()(const as_value& val) {
_v.push_back(val.to_number());
}