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due to macro expansion, the root node is not always a file
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Parser has the invariant that `{}` are balanced.
Previous code tried (unsucesfuly) maintain the same invariant for
`$()` as well, but it was done in a rather ad-hoc manner: it's not at
all obvious that it is possible to maintain both invariants!
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1796: Support completion for macros r=matklad a=uHOOCCOOHu
This is based on #1795 , and fixes #1727
Also prettify hover text of macros.
Some screenshorts below:
Completion in item place.
<img width="416" alt="Screenshot_20190910_134056" src="https://user-images.githubusercontent.com/14816024/64587159-fa72da00-d3d0-11e9-86bb-c98f169ec08d.png">
After pressing `tab`.
<img width="313" alt="Screenshot_20190910_134111" src="https://user-images.githubusercontent.com/14816024/64587160-fa72da00-d3d0-11e9-9464-21e3f6957bd7.png">
Complete macros from `std`.
<img width="588" alt="Screenshot_20190910_134147" src="https://user-images.githubusercontent.com/14816024/64587161-fb0b7080-d3d0-11e9-866e-5161f0d1b546.png">
Hover text.
<img width="521" alt="Screenshot_20190910_134242" src="https://user-images.githubusercontent.com/14816024/64587162-fb0b7080-d3d0-11e9-8f09-ad17e3f6702a.png">
Co-authored-by: uHOOCCOOHu <[email protected]>
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1806: refactor(args): Switch to pico-args r=matklad a=Geobert
Fixes https://github.com/rust-analyzer/rust-analyzer/issues/1768
Co-authored-by: Geobert Quach <[email protected]>
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cc https://github.com/rust-lang/rust/issues/64242
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We regressed $i * 2 where $i = 1 + 1, need to fix that!
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1795: Make macro scope a real name scope and fix some details r=matklad a=uHOOCCOOHu
This PR make macro's module scope a real name scope in `PerNs`, instead of handling `Either<PerNs, MacroDef>` everywhere.
In `rustc`, the macro scope behave exactly the same as type and value scope.
It is valid that macros, types and values having exact the same name, and a `use` statement will import all of them. This happened to module `alloc::vec` and macro `alloc::vec!`.
So `Either` is not suitable here.
There is a trap that not only does `#[macro_use]` import all `#[macro_export] macro_rules`, but also imports all macros `use`d in the crate root.
In other words, it just _imports all macros in the module scope of crate root_. (Visibility of `use` doesn't matter.)
And it also happened to `libstd` which has `use alloc_crate::vec;` in crate root to re-export `alloc::vec`, which it both a module and a macro.
The current implementation of `#[macro_use] extern crate` doesn't work here, so that is why only macros directly from `libstd` like `dbg!` work, while `vec!` from `liballoc` doesn't.
This PR fixes this.
Another point is that, after some tests, I figure out that _`macro_rules` does NOT define macro in current module scope at all_.
It defines itself in legacy textual scope. And if `#[macro_export]` is given, it also is defined ONLY in module scope of crate root. (Then being `macro_use`d, as mentioned above)
(Well, the nightly [Declarative Macro 2.0](https://github.com/rust-lang/rust/issues/39412) simply always define in current module scope only, just like normal items do. But it is not yet supported by us)
After this PR, in my test, all non-builtin macros are resolved now. (Hover text for documentation is available) So it fixes #1688 . Since compiler builtin macros are marked as `#[rustc_doc_only_macro]` instead of `#[macro_export]`, we can simply tweak the condition to let it resolved, but it may cause expansion error.
Some critical notes are also given in doc-comments.
<img width="447" alt="Screenshot_20190909_223859" src="https://user-images.githubusercontent.com/14816024/64540366-ac1ef600-d352-11e9-804f-566ba7559206.png">
Co-authored-by: uHOOCCOOHu <[email protected]>
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Fix some details about module scoping
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Some method resolution tests now yield `{unknown}` where they did not
before.
Other tests now succeed, likely because this is helping the solver
steer its efforts.
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As discussed on Zulip, this actually matches the present behavior of
rustc.
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1789: Debug r=matklad a=matklad
Co-authored-by: Aleksey Kladov <[email protected]>
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This is to make debugging rust-analyzer easier.
The idea is that `dbg!(krate.debug(db))` will print the actual, fuzzy
crate name, instead of precise ID. Debug printing infra is a separate
thing, to make sure that the actual hir doesn't have access to global
information.
Do not use `.debug` for `log::` logging: debugging executes queries,
and might introduce unneded dependencies to the crate graph
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1793: Fix outer doc-comments of `macro_rules` r=matklad a=uHOOCCOOHu
Document comments of `macro_rules!` is currently parsed outside the `MACRO_CALL` node,
which makes `DocCommentsOwner::doc_comments()` always empty.
For the input:
```rust
/// Some docs
macro_rules! foo {
() => {};
}
```
Current parsing tree is:
```
SOURCE_FILE
COMMENT // <- This should be children of MACRO_CALL
WHITESPACE
MACRO_CALL
PATH
<...omitted...>
```
It should be:
```
SOURCE_FILE
MACRO_CALL
COMMENT
WHITESPACE
PATH
<...omitted...>
```
Co-authored-by: uHOOCCOOHu <[email protected]>
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Add comments
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This reverts commit 2c494eb803c88ef5d23607c3b156fce60c2b8076.
See: https://github.com/rust-analyzer/rust-analyzer/pull/1784#issuecomment-529119924
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The clauses need to be wrapped in `FromEnv` clauses for elaboration (i.e.
things like inferring `T: Clone` from `T: Copy`) to work correctly.
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E.g. if we have `T: some::Trait`, we can call methods from that trait without it
needing to be in scope.
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