Pass features along during expansion #22383
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r? @huonw (rust_highfive has picked a reviewer for you, use r? to override) |
| @@ -590,11 +609,18 @@ fn check_crate_inner<F>(cm: &CodeMap, span_handler: &SpanHandler, krate: &ast::C | |||
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| check(&mut cx, krate); | |||
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| // FIXME (pnkfelix): Before adding the 99th entry below, change it | |||
| // to a single-pass (instead of N calls to `.has_feature`)a. | |||
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ah good old tidy; that's what I get for introducing line breaks. |
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r=me with the comment and maybe some squashing. |
The other cases: `concat_idents!`, `log_syntax!`, and `trace_macros!`, (these macros, with `asm!`, are handled (eagerly) in feature_gate.rs).
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⌛ Testing commit dc0797c with merge a108a0a... |
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💔 Test failed - auto-win-64-opt |
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@bors: retry |
Manishearth
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…-expansion, r=huonw Pass features along during expansion Use the set of passed features to detect uses of feature-gated macros without the corresponding feature enabled. Fix rust-lang#22234. ---- Also, the framework this add (passing along a reference to the features in the expansion context) is a necessary precursor for landing a properly feature-gated desugaring-based overloaded-`box` and placement-`in` (rust-lang#22181). ---- This is fixing a bug, but since there might be code out there that is unknowingly taking advantage of that bug, I feel obligated to mark this as a: [breaking-change]
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Pass features along during expansion
Use the set of passed features to detect uses of feature-gated macros without the corresponding feature enabled.
Fix #22234.
Also, the framework this add (passing along a reference to the features in the expansion context) is a necessary precursor for landing a properly feature-gated desugaring-based overloaded-
boxand placement-in(#22181).This is fixing a bug, but since there might be code out there that is unknowingly taking advantage of that bug, I feel obligated to mark this as a:
[breaking-change]