Description

A Lambda Expression is a compile-time invocable entity in either of the following two forms:

• Metafunction Class
• Placeholder Expression

Most of the MPL components accept either of those, and the concept gives us a consice way to describe these requirements.

Expression requirements

See corresponding Metafunction Class and Placeholder Expression specifications.

Models

• always
• unpack_args
• plus<_, int_<2> >
• if_< less<_1, int_<7> >, plus<_1,_2>, _1 >

See also

Metafunctions, Placeholders, apply, lambda