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Feb 21, 2025 at 16:42
43
Doing another iteration on my diagnostics display. I'm reasonably happy with the bold highlighting within the error message. I'm not sure about the colour on Warning and Error though. It gives the output some visual structure, but arguably the message itself is more important.
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Jul 28, 2026 at 17:58
Today in cursed C code: void foo(int32_t int32_t, int32_t bar); Since C puts identifiers and typedefs in the same namespace, this code just produces a confusing compile error about the type of bar! (This occurred in some real code after macro expansion.)
Jul 16, 2026 at 09:23
3
Compiler error messages is such a deep topic. Even in rustc, a mature compiler that invests effort in diagnostic quality, I find interesting issues every few months. (The majority have been fixed pretty quickly, so it's really rewarding to file issues.)
May 10, 2026 at 10:21
2
What types should you infer when code is invalid? In Garden, + only applies to integers. What should the type of "x" + "y" be? (1) Int: This produces cascading errors. (2) String: We've already emitted an error anyway. (3) Bottom. Opinions?