DifferenceOperation.ceylon
import ceylon.ast.core {
DifferenceOperation,
ScalingExpression,
AddingExpression
}
import com.redhat.ceylon.compiler.typechecker.tree {
Tree {
JDifferenceOp=DifferenceOp
}
}
"Converts a RedHat AST [[DifferenceOp|JDifferenceOp]] to a `ceylon.ast` [[DifferenceOperation]]."
shared DifferenceOperation differenceOperationToCeylon(JDifferenceOp differenceOperation) {
"Check precedence"
assert (is AddingExpression left = expressionToCeylon(differenceOperation.leftTerm),
is ScalingExpression right = expressionToCeylon(differenceOperation.rightTerm));
return DifferenceOperation(left, right);
}
"Compiles the given [[code]] for a Difference Operation
into a [[DifferenceOperation]] using the Ceylon compiler
(more specifically, the rule for an `additiveExpression`)."
shared DifferenceOperation? compileDifferenceOperation(String code) {
if (is JDifferenceOp jAdditiveExpression = createParser(code).additiveExpression()) {
return differenceOperationToCeylon(jAdditiveExpression);
} else {
return null;
}
}