KeySubscript.ceylon
import ceylon.ast.core {
KeySubscript,
AddingExpression,
Node
}
import com.redhat.ceylon.compiler.typechecker.tree {
JNode=Node,
Tree {
JElement=Element
}
}
"Converts a RedHat AST [[Element|JElement]] to a `ceylon.ast` [[KeySubscript]]."
shared KeySubscript keySubscriptToCeylon(JElement keySubscript, Anything(JNode,Node) update = noop) {
"Check precedence"
assert (is AddingExpression key = expressionToCeylon(keySubscript.expression, update));
value result = KeySubscript(key);
update(keySubscript, result);
return result;
}
"Compiles the given [[code]] for a Key Subscript
into a [[KeySubscript]] using the Ceylon compiler
(more specifically, the rule for a `indexOrIndexRange`)."
shared KeySubscript? compileKeySubscript(String code, Anything(JNode,Node) update = noop) {
if (is JElement jElementOrRange = createParser("[``code``]").indexOrIndexRange().elementOrRange) {
return keySubscriptToCeylon(jElementOrRange, update);
} else {
return null;
}
}