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2026
Filters Author: Jeremy Rifkin EWG Clear all
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Paper Title Authors Audience Doc Date
P3384R1 __COUNTER__ J. Rifkin
EWG
Intent Proposal
Mailing Date 2026-04 Post-Croydon
Author(s) Jeremy Rifkin
Target Audience EWG
Tracking issue View on GitHub
Abstract The `__COUNTER__` predefined macro is a common language extension for C and C++ which expands to an integer literal that starts at `0` and increments by `1` every time it is expanded in a translation unit. This is useful for generating unique identifiers, generating unique indices, and other preprocessor metaprogramming uses.
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