LazySpecifier.ceylon
import ceylon.ast.core {
LazySpecifier,
Node
}
import com.redhat.ceylon.compiler.typechecker.tree {
JNode=Node,
Tree {
JLazySpecifierExpression=LazySpecifierExpression
}
}
import com.redhat.ceylon.compiler.typechecker.parser {
CeylonLexer {
compute=\iCOMPUTE
}
}
"Converts a RedHat AST [[LazySpecifierExpression|JLazySpecifierExpression]] to a `ceylon.ast` [[LazySpecifier]]."
shared LazySpecifier lazySpecifierToCeylon(JLazySpecifierExpression lazySpecifier, Anything(JNode,Node) update = noop) {
"Must be a “wrapper” Expression, not a grouping Expression"
assert (!lazySpecifier.expression.mainToken exists);
"Must be a true lazy specifier"
// The grammar rule functionSpecifier allows '= expression' and proceeds to create a LazySpecifierExpression($SPECIFY). madness
assert (lazySpecifier.mainToken.type == compute);
value result = LazySpecifier(expressionToCeylon(lazySpecifier.expression.term, update));
update(lazySpecifier, result);
return result;
}
"Compiles the given [[code]] for a Lazy Specifier
into a [[LazySpecifier]] using the Ceylon compiler
(more specifically, the rule for a `lazySpecifier`)."
shared LazySpecifier? compileLazySpecifier(String code, Anything(JNode,Node) update = noop) {
if (exists jLazySpecifier = createParser(code).lazySpecifier()) {
"The grammar rule declares only SpecifierExpression, but will always return LazySpecifierExpression"
assert (is JLazySpecifierExpression jLazySpecifier);
return lazySpecifierToCeylon(jLazySpecifier, update);
} else {
return null;
}
}