A defer feature using lambda expressions

In the previous post https://gustedt.wordpress.com/2020/12/14/a-defer-mechanism-for-c/ I already presented an idea for a defer feature for C, namely a feature that would provide a simple mechanism to cleanup at the end of a block, regardless how that block is left. There are many different extension out there that provide such a feature, for example POSIX’ pthread_cleanup_push and pthread_cleanup_pop, Microsoft’s __try and __finally and gcc’s cleanup attribute. Although they are used quite often, none of these extension has yet been adopted widely enough to prefer it over the others for standardization.

In a new paper

A simple defer feature for C

we present a much simpler version of a unifying framework for such cleanup features which is conditionned to the acceptance of lambdas into C23:

   defer lambda-expression;

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