VariablePattern.ceylon
import ceylon.ast.core {
Node,
VariablePattern,
UnspecifiedVariable,
Type,
ValueModifier
}
import com.redhat.ceylon.compiler.typechecker.tree {
JNode=Node,
Tree {
JStaticType=StaticType,
JValueModifier=ValueModifier,
JVariablePattern=VariablePattern
}
}
"Converts a RedHat AST [[VariablePattern|JVariablePattern]] to a `ceylon.ast` [[VariablePattern]]."
shared VariablePattern variablePatternToCeylon(JVariablePattern variablePattern, Anything(JNode,Node) update = noop) {
Type|ValueModifier? type;
value jVariable = variablePattern.variable;
value jType = jVariable.type;
if (is JStaticType jType) {
type = typeToCeylon(jType, update);
} else {
assert (is JValueModifier jType);
// The parser creates a ValueModifier with null token if the type is missing completely
type = jType.mainToken exists then valueModifierToCeylon(jType, update) else null;
}
value variable = UnspecifiedVariable(lIdentifierToCeylon(jVariable.identifier, update), type);
update(jVariable, variable);
value result = VariablePattern(variable);
update(variablePattern, result);
return result;
}
"Compiles the given [[code]] for a Variable Pattern
into a [[VariablePattern]] using the Ceylon compiler
(more specifically, the rule for a `variablePattern`)."
shared VariablePattern? compileVariablePattern(String code, Anything(JNode,Node) update = noop) {
if (exists jVariablePattern = createParser(code + ",").variablePattern()) {
// the parser needs that comma sometimes
return variablePatternToCeylon(jVariablePattern, update);
} else {
return null;
}
}