Jens Gustedt • 2/13/2025

Preprocessor meta-quotes with eĿlipsis

The article details a new feature in the eĿlipsis preprocessor called meta-quotes, using characters ⸤ and ⸥ (or digraphs <| and |>) to protect identifiers from macro expansion. It explains how this solves a common C preprocessor problem where token concatenation (##) can lead to unintended macro expansions and name collisions, offering a more robust alternative to C's limited protection rules.

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#language design #macros #metaprogramming