I've finally added a loop-for-each-line macro to my loop library: https://github.com/Wilfred/loop.el#loop-for-each-line -- I've often wanted this.
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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.)
Rust macro errors are significantly improving:
@friend It seems like people find Zig comptime easier to reason about, hence the interest in introducing it to other languages.
That seems worth something. I still prefer Lisp/Clojure style macros over safer Scheme/Rust macros. Lisp macro implementations are closer to typical code.