public override void Compile(ICompiler cmp, bool reverse)
{
if (group == null)
{
Alternate.Compile(cmp, reverse);
return;
}
int gid = group.Number;
LinkRef tail = cmp.NewLink();
if (FalseExpression == null)
{
// IfDefined :1
// <yes_exp>
// 1: <tail>
cmp.EmitIfDefined(gid, tail);
TrueExpression.Compile(cmp, reverse);
}
else
{
// IfDefined :1
// <yes_expr>
// Jump :2
// 1: <no_expr>
// 2: <tail>
LinkRef false_expr = cmp.NewLink();
cmp.EmitIfDefined(gid, false_expr);
TrueExpression.Compile(cmp, reverse);
cmp.EmitJump(tail);
cmp.ResolveLink(false_expr);
FalseExpression.Compile(cmp, reverse);
}
cmp.ResolveLink(tail);
}
