/** Find a function that matches a function call */
public ScopeSymbol findFunction(String functionName, Args args) {
// Retrieve all functions with the same name
List<ScopeSymbol> ssfuncs = getFunctions(functionName);
// Find best matching function...
ScopeSymbol bestSsfunc = null;
int bestScore = Integer.MAX_VALUE;
for (ScopeSymbol ssfunc : ssfuncs) {
boolean ok = false;
int score = 0;
TypeFunc sstype = (TypeFunc) ssfunc.getType();
// Find the ones with the same number of parameters
int argc = args.size();
if (argc == sstype.getParameters().size()) {
ok = true;
// Find the ones with matching exact parameters
for (int i = 0; i < args.size(); i++) {
Type argType = args.getArguments()[i].getReturnType();
Type funcType = sstype.getParameters().getType(i);
// Same argument?
if ((argType != null) && !argType.equals(funcType)) {
// Can we cast?
if (argType.canCast(funcType)) score++; // Add a point if we can cast
else ok = false;
}
}
}
// Found anything?
if (ok) {
// Perfect match? Don't look any further
if (score == 0) return ssfunc;
// Get the one with less argument casts
if (score < bestScore) {
bestScore = score;
bestSsfunc = ssfunc;
}
}
}
return bestSsfunc;
}
/** Class scope */
public static Scope getClassScope(Type type) {
if (type == null) return null;
return classScope.getOrCreate(type.toString());
}
