# Glib::Markup::AttributeKeyLess Class Reference
[Simple XML Subset Parser]

Binary predicate used by Markup::Parser::AttributeMap. More...

`#include <glibmm/markup.h>`

List of all members.

## Public Types
typedef Glib::ustring | first_argument_type
typedef Glib::ustring | second_argument_type
typedef bool | result_type
## Public Member Functions
bool | operator() (const Glib::ustring& lhs, const Glib::ustring& rhs) const

## Detailed Description

Binary predicate used by Markup::Parser::AttributeMap.

Unlike `operator<(const ustring& lhs, const ustring& rhs)` which would be used by the default `std::less<>` predicate, the AttributeKeyLess predicate is locale-independent. This is both more correct and much more efficient.

## Member Typedef Documentation

typedef Glib::ustring Glib::Markup::AttributeKeyLess::first_argument_type

typedef bool Glib::Markup::AttributeKeyLess::result_type

typedef Glib::ustring Glib::Markup::AttributeKeyLess::second_argument_type

## Member Function Documentation

bool Glib::Markup::AttributeKeyLess::operator() | ( | const Glib::ustring& | lhs,
|  | const Glib::ustring& | rhs |
| ) |  |  | const