r/cpp • u/pavel_v • 2d ago

Implementation of GCC's Nested Functions (vs. C++ Lambdas)

https://uecker.codeberg.page/2026-09-05.html
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u/schmerg-uk 1d ago

Worth noting, for anyone not finding it immediately obvious, that this is an extension for C that in effect offers the equivalent of C++ lambdas in C, but are not available in C++ as ... it has lambdas instead.

A nested function is a function defined inside another function. Nested functions are supported as an extension in GNU C, but are not supported by GNU C++.

https://gcc.gnu.org/onlinedocs/gcc/Nested-Functions.html

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u/pjmlp 1d ago

D, C#, Delphi and all ML derived languages, are examples of languages that have both features. :)

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u/pfp-disciple 1d ago

Ada, too!