/// <summary>
/// Emits code for relation comparison: greater, less, etc.
/// </summary>
private void EmitRelation(Context ctx, Type left, Type right)
{
var gen = ctx.CurrentMethod.Generator;
// string comparisons
if (left == typeof(string))
{
LeftOperand.Emit(ctx, true);
RightOperand.Emit(ctx, true);
var method = typeof(string).GetMethod("Compare", new[] { typeof(string), typeof(string) });
gen.EmitCall(method);
if (Kind.IsAnyOf(ComparisonOperatorKind.Less, ComparisonOperatorKind.GreaterEquals))
{
gen.EmitConstant(-1);
gen.EmitCompareEqual();
if (Kind == ComparisonOperatorKind.GreaterEquals)
{
EmitInversion(gen);
}
}
else
{
gen.EmitConstant(1);
gen.EmitCompareEqual();
if (Kind == ComparisonOperatorKind.LessEquals)
{
EmitInversion(gen);
}
}
}
// numeric comparison
LoadAndConvertNumerics(ctx);
if (Kind.IsAnyOf(ComparisonOperatorKind.Less, ComparisonOperatorKind.GreaterEquals))
{
gen.EmitCompareLess();
if (Kind == ComparisonOperatorKind.GreaterEquals)
{
EmitInversion(gen);
}
}
else
{
gen.EmitCompareGreater();
if (Kind == ComparisonOperatorKind.LessEquals)
{
EmitInversion(gen);
}
}
}
