https://blog.ouankou.com/series/rex-frontend-modernization/Recent content in REX Frontend Modernization on ./CodeHugoen-US© Anjia WangSat, 16 May 2026 23:05:22 -0700https://blog.ouankou.com/2026/05/02/how-rex-fixed-the-cxx-grammar-timeout-by-owning-the-frontend-traversal-boundary/Sat, 02 May 2026 00:00:00 +0000https://blog.ouankou.com/2026/05/02/how-rex-fixed-the-cxx-grammar-timeout-by-owning-the-frontend-traversal-boundary/<p>Some compiler failures are loud in the right way. An assertion points at a broken parent pointer. A generated file fails to compile and the diagnostic tells you which declaration pair disagrees. A symbol lookup fails in a scope that should have owned it.</p> <p>Timeouts are worse.</p> <p>They say only that the compiler disappeared into work it could not finish before the test harness gave up. For a source-to-source compiler, that can mean many different things:</p>