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[beta] rustdoc: semi-revert libsyntax doctest parsing if a macro is wrapping main #57019
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[beta] rustdoc: semi-revert libsyntax doctest parsing if a macro is wrapping main #57019
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Ping @rust-lang/rustdoc, can someone review this? |
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I feel like this is getting more and more hackish code. But at least it does the job. Thanks! @bors: r+ |
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…=GuillaumeGomez [beta] rustdoc: semi-revert libsyntax doctest parsing if a macro is wrapping main Fixes #56898 This is a patch to doctest parsing on beta (that i plan to "forward-port" to master) that reverts to the old text-based `fn main` scan if it found a macro invocation in the doctest but did not find a main function. This should solve situations like `allocator_api` which wrap their main functions in a macro invocation, but doesn't solve something like the initial version of `quicli` which used a macro to *generate* the main function. (Properly doing the latter involves running macro expansion before checking, which is a bit too involved for a beta fix.)
☀️ Test successful - status-appveyor, status-travis |
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…-parsing, r=GuillaumeGomez rustdoc: use text-based doctest parsing if a macro is wrapping main This is a "forward-port" of rust-lang#57019, intended to get rust-lang#56898 on nightly, since it's now fixed on beta (and already worked on stable). To recap: * The libsyntax-based doctest parsing now checks to see whether there is a top-level macro invocation in the doctest while it's checking for `fn main` and an `extern crate` statement. * If it finds a macro invocation and *didn't* find `fn main`, then it performs the older text-based scan to allow doctests like the ones in `allocator_api` to still compile. A "proper" fix will involve changing how `make_test` works to call it later in the `run_test` function, after the initial steps of compilation have completed. I've filed [a separate issue](rust-lang#57415) for that, though.
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Fixes #56898
This is a patch to doctest parsing on beta (that i plan to "forward-port" to master) that reverts to the old text-based
fn main
scan if it found a macro invocation in the doctest but did not find a main function. This should solve situations likeallocator_api
which wrap their main functions in a macro invocation, but doesn't solve something like the initial version ofquicli
which used a macro to generate the main function. (Properly doing the latter involves running macro expansion before checking, which is a bit too involved for a beta fix.)