syntax: indicate an error when a macro ignores trailing tokens. #9673
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That is, only a single expression or item gets parsed, so if there are
any extra tokens (e.g. the start of another item/expression) the user
should be told, rather than silently dropping them.
An example:
macro_rules! foo {
() => {
println("hi");
println("bye);
}
}
would expand to just `println("hi")`, which is almost certainly not
what the programmer wanted.
Fixes rust-lang#8012.
bors
added a commit
that referenced
this pull request
Oct 2, 2013
That is, only a single expression or item gets parsed, so if there are
any extra tokens (e.g. the start of another item/expression) the user
should be told, rather than silently dropping them.
An example:
macro_rules! foo {
() => {
println("hi");
println("bye);
}
}
would expand to just `println("hi")`, which is almost certainly not
what the programmer wanted.
Fixes #8012.
Dylan-DPC
pushed a commit
to Dylan-DPC/rust
that referenced
this pull request
Nov 1, 2022
feat: type inference for generic associated types This PR implements type inference for generic associated types. Basically, this PR lowers generic arguments for associated types in valid places and creates `Substitution`s for them. I focused on the inference for correct Rust programs, so there are cases where we *accidentally* manage to infer things that are actually invalid (which would then be reported by flycheck so I deem them non-fatal). See the following tests and FIXME notes on them: `gats_with_dyn`, `gats_with_impl_trait`. The added tests are rather arbitrary. Let me know if there are cases I'm missing or I should add. Closes rust-lang#9673
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That is, only a single expression or item gets parsed, so if there are
any extra tokens (e.g. the start of another item/expression) the user
should be told, rather than silently dropping them.
An example:
would expand to just
println("hi"), which is almost certainly notwhat the programmer wanted.
Fixes #8012.