public override INumber Eval(RuntimeData runtime)
{
var den = this.Denominator.Eval(runtime);
var num = this.Numerator.Eval(runtime);
Fraction f = new Expression.Fraction(den, num);
if (runtime.Setting.DoOptimize)
{
return(f.Optimise(runtime));
}
else
{
return(f);
}
}
public override INumber Multiple(RuntimeData runtime, INumber val)
{
if (val is Number)
{ // Powあっても大丈夫
INumber res = new Expression.Fraction(
this.Denominator,
this.Numerator.Multiple(runtime, val)
);
if (runtime.Setting.DoOptimize)
{
res = res.Optimise(runtime);
}
return(res);
}
if (val is Fraction)
{
INumber res = new Fraction(
this.Denominator.Multiple(runtime, (val as Fraction).Denominator),
this.Numerator.Multiple(runtime, (val as Fraction).Numerator));
if (runtime.Setting.DoOptimize)
{
return(res.Optimise(runtime));
}
else
{
return(res);
}
}
// 旧コード 2017/01/12
// return val.Multiple(runtime, this);
{
var res = this.Clone() as Fraction;
res.Numerator = res.Numerator.Multiple(runtime, val);
return(res);
}
}