RangeSubscript.ceylon
import ceylon.ast.core {
Node,
RangeSubscript
}
import com.redhat.ceylon.compiler.typechecker.tree {
JNode=Node,
Tree {
JElementRange=ElementRange
}
}
"Converts a RedHat AST [[ElementRange|JElementRange]] to a `ceylon.ast` [[RangeSubscript]]."
shared RangeSubscript rangeSubscriptToCeylon(JElementRange rangeSubscript, Anything(JNode,Node) update = noop) {
// the missing existence and non-existence assertions are done in the individual toCeylon functions
RangeSubscript result;
if (rangeSubscript.lowerBound exists) {
if (rangeSubscript.upperBound exists) {
result = spanSubscriptToCeylon(rangeSubscript, update);
} else if (rangeSubscript.length exists) {
result = measureSubscriptToCeylon(rangeSubscript, update);
} else {
result = spanFromSubscriptToCeylon(rangeSubscript, update);
}
} else {
result = spanToSubscriptToCeylon(rangeSubscript, update);
}
update(rangeSubscript, result);
return result;
}
"Compiles the given [[code]] for a Range Subscript
into a [[RangeSubscript]] using the Ceylon compiler
(more specifically, the rule for an `indexOrIndexRange`)."
shared RangeSubscript? compileRangeSubscript(String code, Anything(JNode,Node) update = noop) {
if (is JElementRange jElementOrRange = createParser("[``code``]").indexOrIndexRange().elementOrRange) {
return rangeSubscriptToCeylon(jElementOrRange, update);
} else {
return null;
}
}