rustdoc: use text-based doctest parsing if a macro is wrapping main #57417
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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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Rollup of 26 pull requests Successful merges: - #56425 (Redo the docs for Vec::set_len) - #56906 (Issue #56905) - #57042 (Don't call `FieldPlacement::count` when count is too large) - #57175 (Stabilize `let` bindings and destructuring in constants and const fn) - #57192 (Change std::error::Error trait documentation to talk about `source` instead of `cause`) - #57296 (Fixed the link to the ? operator) - #57368 (Use CMAKE_{C,CXX}_COMPILER_LAUNCHER for ccache) - #57400 (Rustdoc: update Source Serif Pro and replace Heuristica italic) - #57417 (rustdoc: use text-based doctest parsing if a macro is wrapping main) - #57433 (Add link destination for `read-ownership`) - #57434 (Remove `CrateNum::Invalid`.) - #57441 (Supporting backtrace for x86_64-fortanix-unknown-sgx.) - #57450 (actually take a slice in this example) - #57459 (Reference tracking issue for inherent associated types in diagnostic) - #57463 (docs: Fix some 'second-edition' links) - #57466 (Remove outdated comment) - #57493 (use structured suggestion when casting a reference) - #57498 (make note of one more normalization that Paths do) - #57499 (note that FromStr does not work for borrowed types) - #57505 (Remove submodule step from README) - #57510 (Add a profiles section to the manifest) - #57511 (Fix undefined behavior) - #57519 (Correct RELEASES.md for 1.32.0) - #57522 (don't unwrap unexpected tokens in `format!`) - #57530 (Fixing a typographical error.) - #57535 (Stabilise irrefutable if-let and while-let patterns) Failed merges: r? @ghost
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This is a "forward-port" of #57019, intended to get #56898 on nightly, since it's now fixed on beta (and already worked on stable).
To recap:
fn mainand anextern cratestatement.fn main, then it performs the older text-based scan to allow doctests like the ones inallocator_apito still compile.A "proper" fix will involve changing how
make_testworks to call it later in therun_testfunction, after the initial steps of compilation have completed. I've filed a separate issue for that, though.