Method WarnUnassignedVar

source/script.cpp:13353–13377

void Script::WarnUnassignedVar(Var *var, Line *aLine)
{
	auto warnMode = g_Warn_VarUnset;
	if (!warnMode)
		return;

	// Currently only the first reference to each var generates a warning even when using
	// StdOut/OutputDebug, since MarkAlreadyWarned() is used to suppress warnings for any
	// var which is checked with IsSet().
	//if (warnMode == WARNMODE_MSGBOX)
	{
		// The following check uses a flag separate to IsAssignedSomewhere() because setting
		// that one for the purpose of preventing multiple MsgBoxes would cause other callers
		// of IsAssignedSomewhere() to get the wrong result if a MsgBox has been shown.
		if (var->HasAlreadyWarned())
			return;
		var->MarkAlreadyWarned();
	}

	bool isUndeclaredLocal = (var->Scope() & (VAR_LOCAL | VAR_DECLARED)) == VAR_LOCAL;
	LPCTSTR sameNameAsGlobal = isUndeclaredLocal && FindGlobalVar(var->mName) ? _T("  (same name as a global)") : _T("");
	TCHAR buf[DIALOG_TITLE_SIZE];
	sntprintf(buf, _countof(buf), _T("%s %s%s"), Var::DeclarationType(var->Scope()), var->mName, sameNameAsGlobal);
	ScriptWarning(warnMode, WARNING_ALWAYS_UNSET_VARIABLE, buf, aLine);
}