public IRubyObject shadowing_lvar(IRubyObject identifier) {
String name = lexer.getIdent();
if (name == "_") return identifier;
StaticScope current = getCurrentScope();
if (current.isBlockScope()) {
if (current.exists(name) >= 0) yyerror("duplicated argument name");
if (lexer.isVerbose() && current.isDefined(name) >= 0) {
lexer.warning("shadowing outer local variable - " + name);
}
} else if (current.exists(name) >= 0) {
yyerror("duplicated argument name");
}
return identifier;
}
