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Front Page / Metafunctions / Concepts / Placeholder Expression

Placeholder Expression

Description

A Placeholder Expression is a type that is either a placeholder or a class template specialization with at least one argument that itself is a Placeholder Expression.

Expression requirements

If X is a class template, and a1,... an are arbitrary types, then X<a1,...,an> is a Placeholder Expression if and only if all of the following conditions hold:

Models

See also

Lambda Expression, Placeholders, Metafunctions, apply, lambda