SpanSubscript.ceylon
"A span subscript,
to select a (sub)range from a [[Ranged]] expression
using the [[first|from]] and [[last|to]] index.
Examples:
1 .. text.size - 2
text.size - 1 .. 0"
see (`function Ranged.span`, `class SpanOperation`)
shared class SpanSubscript(from, to)
extends RangeSubscript() {
"The expression for the first selected index.
See [[Ranged.span.from]]."
shared AddingExpression from;
"The expression for the last selected index.
See [[Ranged.span.to]]."
shared AddingExpression to;
shared actual [AddingExpression, AddingExpression] children = [from, to];
shared actual Result transform<out Result>(Transformer<Result> transformer)
=> transformer.transformSpanSubscript(this);
shared actual void visit(Visitor visitor)
=> visitor.visitSpanSubscript(this);
shared actual Boolean equals(Object that) {
if (is SpanSubscript that) {
return from == that.from && to == that.to;
} else {
return false;
}
}
shared actual Integer hash
=> 31 * (from.hash + 31 * to.hash);
shared SpanSubscript copy(AddingExpression from = this.from, AddingExpression to = this.to) {
value ret = SpanSubscript(from, to);
copyExtraInfoTo(ret);
return ret;
}
}