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< td class = "header-group page-location" > < a href = "../refmanual.html" class = "navigation-link" > Front Page< / a > / < a href = "./metafunctions.html" class = "navigation-link" > Metafunctions< / a > / < a href = "./metafunctions-concepts.html" class = "navigation-link" > Concepts< / a > / < a href = "./lambda-expression.html" class = "navigation-link" > Lambda Expression< / a > < / td >
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< h1 > < a class = "toc-backref" href = "./metafunctions-concepts.html#id1514" > Lambda Expression< / a > < / h1 >
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< h3 > < a class = "subsection-title" href = "#description" name = "description" > Description< / a > < / h3 >
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< p > A < a class = "reference internal" href = "./lambda-expression.html" > Lambda Expression< / a > is a compile-time invocable entity in either of the following two
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forms:< / p >
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< li > < a class = "reference internal" href = "./metafunction-class.html" > Metafunction Class< / a > < / li >
< li > < a class = "reference internal" href = "./placeholder-expression.html" > Placeholder Expression< / a > < / li >
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< p > Most of the MPL components accept either of those, and the concept
gives us a consice way to describe these requirements.< / p >
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< div class = "section" id = "id832" >
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< h3 > < a class = "subsection-title" href = "#expression-requirements" name = "expression-requirements" > Expression requirements< / a > < / h3 >
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< p > See corresponding < a class = "reference internal" href = "./metafunction-class.html" > Metafunction Class< / a > and < a class = "reference internal" href = "./placeholder-expression.html" > Placeholder Expression< / a > specifications.< / p >
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< h3 > < a class = "subsection-title" href = "#models" name = "models" > Models< / a > < / h3 >
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< li > < a class = "reference internal" href = "./always.html" > always< / a > < / li >
< li > < a class = "reference internal" href = "./unpack-args.html" > unpack_args< / a > < / li >
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< li > < tt class = "literal" > < span class = "pre" > < a href = "./plus.html" class = "identifier" > plus< / a > < _,< / span > < span class = "pre" > < a href = "./int.html" class = "identifier" > int_< / a > < 2> < / span > < span class = "pre" > > < / span > < / tt > < / li >
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< li > < tt class = "literal" > < span class = "pre" > < a href = "./if.html" class = "identifier" > if_< / a > < < / span > < span class = "pre" > < a href = "./less.html" class = "identifier" > less< / a > < < a href = "./placeholders.html" class = "identifier" > _1< / a > ,< / span > < span class = "pre" > < a href = "./int.html" class = "identifier" > int_< / a > < 7> < / span > < span class = "pre" > > ,< / span > < span class = "pre" > < a href = "./plus.html" class = "identifier" > plus< / a > < < a href = "./placeholders.html" class = "identifier" > _1< / a > ,< a href = "./placeholders.html" class = "identifier" > _2< / a > > ,< / span > < span class = "pre" > < a href = "./placeholders.html" class = "identifier" > _1< / a > < / span > < span class = "pre" > > < / span > < / tt > < / li >
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< h3 > < a class = "subsection-title" href = "#see-also" name = "see-also" > See also< / a > < / h3 >
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< p > < a class = "reference internal" href = "./metafunctions.html" > Metafunctions< / a > , < a class = "reference internal" href = "./placeholders.html" > Placeholders< / a > , < a class = "reference internal" href = "./apply.html" > apply< / a > , < a class = "reference internal" href = "./lambda.html" > lambda< / a > < / p >
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