@NotNull
private JsExpression translateAsMethodCall(
@NotNull JsExpression arrayExpression, @Nullable JsExpression toSetTo) {
boolean isGetter = toSetTo == null;
TranslationContext context = context();
ResolvedCall<FunctionDescriptor> resolvedCall =
BindingUtils.getResolvedCallForArrayAccess(bindingContext(), expression, isGetter);
if (!isGetter) {
context = contextWithValueParameterAliasInArrayGetAccess(toSetTo);
}
return CallTranslator.translate(context, resolvedCall, arrayExpression);
}
// this is hack for a[b]++ -> a.set(b, a.get(b) + 1). Frontend generate fake expression for
// a.get(b) + 1.
@NotNull
private TranslationContext contextWithValueParameterAliasInArrayGetAccess(
@NotNull JsExpression toSetTo) {
ResolvedCall<FunctionDescriptor> resolvedCall =
BindingUtils.getResolvedCallForArrayAccess(
bindingContext(), expression, /*isGetter = */ false);
List<ResolvedValueArgument> arguments = resolvedCall.getValueArgumentsByIndex();
if (arguments == null) {
throw new IllegalStateException(
"Failed to arrange value arguments by index: " + resolvedCall.getResultingDescriptor());
}
ResolvedValueArgument lastArgument = arguments.get(arguments.size() - 1);
assert lastArgument instanceof ExpressionValueArgument
: "Last argument of array-like setter must be ExpressionValueArgument: " + lastArgument;
ValueArgument valueArgument = ((ExpressionValueArgument) lastArgument).getValueArgument();
assert valueArgument != null;
JetExpression element = valueArgument.getArgumentExpression();
return context()
.innerContextWithAliasesForExpressions(Collections.singletonMap(element, toSetTo));
}