Method lookupVar

src/jvm/clojure/lang/Compiler.java:8046–8088

(Symbol sym, boolean internNew, boolean registerMacro)

static Var lookupVar(Symbol sym, boolean internNew, boolean registerMacro) {
	Var var = null;

	//note - ns-qualified vars in other namespaces must already exist
	if(sym.ns != null)
		{
		Namespace ns = namespaceFor(sym);
		if(ns == null)
			return null;
		//throw Util.runtimeException("No such namespace: " + sym.ns);
		Symbol name = Symbol.intern(sym.name);
		if(internNew && ns == currentNS())
			var = currentNS().intern(name);
		else
			var = ns.findInternedVar(name);
		}
	else if(sym.equals(NS))
		var = RT.NS_VAR;
	else if(sym.equals(IN_NS))
			var = RT.IN_NS_VAR;
		else
			{
			//is it mapped?
			Object o = currentNS().getMapping(sym);
			if(o == null)
				{
				//introduce a new var in the current ns
				if(internNew)
					var = currentNS().intern(Symbol.intern(sym.name));
					}
			else if(o instanceof Var)
				{
				var = (Var) o;
				}
			else
				{
				throw Util.runtimeException("Expecting var, but " + sym + " is mapped to " + o);
				}
			}
	if(var != null && (!var.isMacro() || registerMacro))
		registerVar(var);
	return var;
}
static Var lookupVar(Symbol sym, boolean internNew) {
    return lookupVar(sym, internNew, true);
}