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path: root/src/libsyntax/ext/expand.rs
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2018-05-02make it compile againflip1995-1/+1
2018-05-02Gate tool_attributes featureSeiichi Uchida-1/+5
2018-05-02Allow Path for name of MetaItemSeiichi Uchida-1/+1
2018-04-30Auto merge of #50092 - abonander:issue-49934, r=petrochenkovbors-11/+57
Warn on pointless #[derive] in more places This fixes the regression in #49934 and ensures that unused `#[derive]` invocations on statements, expressions and generic type parameters survive to trip the `unused_attributes` lint. There is a separate warning hardcoded for `#[derive]` on macro invocations since linting (even the early-lint pass) occurs after expansion. This also adds regression tests for some nodes that were already warning properly. closes #49934
2018-04-29Warn on pointless `#[derive]` in more placesAustin Bonander-11/+57
This fixes the regression in #49934 and ensures that unused `#[derive]`s on statements, expressions and generic type parameters survive to trip the `unused_attributes` lint. For `#[derive]` on macro invocations it has a hardcoded warning since linting occurs after expansion. This also adds regression testing for some nodes that were already warning properly. closes #49934
2018-04-20rustc: Tweak custom attribute capabilitiesAlex Crichton-1/+74
This commit starts to lay some groundwork for the stabilization of custom attribute invocations and general procedural macros. It applies a number of changes discussed on [internals] as well as a [recent issue][issue], namely: * The path used to specify a custom attribute must be of length one and cannot be a global path. This'll help future-proof us against any ambiguities and give us more time to settle the precise syntax. In the meantime though a bare identifier can be used and imported to invoke a custom attribute macro. A new feature gate, `proc_macro_path_invoc`, was added to gate multi-segment paths and absolute paths. * The set of items which can be annotated by a custom procedural attribute has been restricted. Statements, expressions, and modules are disallowed behind two new feature gates: `proc_macro_expr` and `proc_macro_mod`. * The input to procedural macro attributes has been restricted and adjusted. Today an invocation like `#[foo(bar)]` will receive `(bar)` as the input token stream, but after this PR it will only receive `bar` (the delimiters were removed). Invocations like `#[foo]` are still allowed and will be invoked in the same way as `#[foo()]`. This is a **breaking change** for all nightly users as the syntax coming in to procedural macros will be tweaked slightly. * Procedural macros (`foo!()` style) can only be expanded to item-like items by default. A separate feature gate, `proc_macro_non_items`, is required to expand to items like expressions, statements, etc. Closes #50038 [internals]: https://internals.rust-lang.org/t/help-stabilize-a-subset-of-macros-2-0/7252 [issue]: https://github.com/rust-lang/rust/issues/50038
2018-04-06Use `Ident` instead of `Name` in `MetaItem`Vadim Petrochenkov-8/+9
2018-04-06Use `Span::apply_mark` where possibleVadim Petrochenkov-1/+1
2018-04-06Rename `PathSegment::identifier` to `ident`Vadim Petrochenkov-4/+4
2018-04-06Use `Span` instead of `SyntaxContext` in `Ident`Vadim Petrochenkov-1/+1
2018-04-03expand macro invocations in `extern {}` blocksAustin Bonander-0/+58
2018-04-02Expand attribute macros on statements and expressions.Austin Bonander-19/+70
Retains the `stmt_expr_attributes` feature requirement for attributes on expressions. closes #41475 cc #38356
2018-03-17Rename `Span::empty` to `Span::shrink_to_lo`, add `Span::shrink_to_hi`Vadim Petrochenkov-1/+1
2018-03-16Auto merge of #48524 - abonander:check-macro-stability, r=petrochenkovbors-16/+40
check stability of macro invocations I haven't implemented tests yet but this should be a pretty solid prototype. I think as-implemented it will also stability-check macro invocations in the same crate, dunno if we want that or not. I don't know if we want this to go through `rustc::middle::stability` or not, considering the information there wouldn't be available at the time of macro expansion (even for external crates, right?). r? @nrc closes #34079 cc @petrochenkov @durka @jseyfried #38356
2018-03-13Fix ICE on malformed plugin attributesMichael Lamparski-2/+4
2018-03-07check stability of macro invocationsAustin Bonander-16/+40
2018-03-02Replace Rc with Lrc for shared dataJohn Kåre Alsaker-5/+5
2018-02-18Replace dummy spans with empty spansSeiichi Uchida-1/+1
2018-02-18Change ast::Visibility to Spanned typeSeiichi Uchida-3/+6
2018-01-26Do not capture stderr in the compiler. Instead just panic silently for fatal ↵John Kåre Alsaker-1/+1
errors
2017-12-26Do not expand a derive invocation when derive is not allowedSeiichi Uchida-79/+91
1. Change the return type of `expand_invoc()` and its subroutines to `Option<Expansion>` from `Expansion`. 2. Return `None` when expanding a derive invocation if the item cannot have derive on it (in `expand_derive_invoc()`).
2017-12-22Rollup merge of #46858 - QuietMisdreavus:external-doc-error, r=estebankkennytm-7/+11
tweaks and fixes for doc(include) This PR makes a handful of changes around `#[doc(include="file.md")]` (https://github.com/rust-lang/rust/issues/44732): * Turns errors when loading files into full errors. This matches the original RFC text. * Makes the `missing_docs` lint check for `#[doc(include="file.md")]` as well as regular `#[doc="text"]` attributes. * Loads files included by `#[doc(include="file.md")]` into dep-info, mirroring the behavior of `include_str!()` and friends. * Adds or modifies tests to check for all of these.
2017-12-19Implement non-mod.rs mod statementsTaylor Cramer-3/+7
2017-12-19add files loaded through doc(include) into dep-infoQuietMisdreavus-0/+4
2017-12-19turn errors with external docs into actual errorsQuietMisdreavus-7/+7
2017-12-17syntax: Rename `P::unwrap` into `P::into_inner`Vadim Petrochenkov-7/+7
2017-12-14Use PathBuf instead of String where applicableOliver Schneider-3/+11
2017-12-09Use hygiene to access the injected crate (`core` or `std`) from builtin macros.Jeffrey Seyfried-2/+0
2017-11-21allow loading external files in documentationQuietMisdreavus-1/+87
Partial implementation of https://github.com/rust-lang/rfcs/pull/1990 (needs error reporting work) cc #44732
2017-11-14avoid the pprust infrastructure in macro expansionAriel Ben-Yehuda-3/+24
This changes macro expansion to format the path of a macro directly instead of usng the pprust infrastructure. The pprust infrastructure tries to perform line-breaking in a slow fashion, which is undesired when formatting the path of a macro. This should to speed up expansion by a fair amount (I saw 20% on a profiler on `rustc_mir`, and 50% of the time marked as "expansion" in the profiler/time-passes is actually spent loading dependencies).
2017-10-03Rename FileMap::path and change to an OptionPhilip Craig-2/+2
2017-09-30Don't use remapped path when loading modules and include filesPhilip Craig-4/+2
2017-09-27Apply attr proc macros before cfg processingTomas Nilsson-14/+25
Now items are not fully configured until right before expanding derives.
2017-09-25Fix bug in collecting trait and impl items with derives.Jeffrey Seyfried-7/+1
2017-09-21suggest an outer attribute when `#![derive(...)]` (predictably) failsZack M. Davis-5/+13
2017-09-21only set non-ADT derive error once per attribute, not per traitZack M. Davis-0/+18
A slight eccentricity of this change is that now non-ADT-derive errors prevent derive-macro-not-found errors from surfacing (see changes to the gating-of-derive compile-fail tests). Resolves #43927.
2017-09-17Rollup merge of #44088 - bjorn3:better_trace_macros, r=jseyfriedTim Neumann-1/+14
Fix "new trace_macros doesn't work if there's an error during expansion" Fixes #43493
2017-09-02Better trace-macro and less span_err_fatalbjorn3-1/+2
2017-08-30Make fields of `Span` privateVadim Petrochenkov-7/+6
2017-08-27Fix errorbjorn3-1/+0
2017-08-25Fix #43493 (new trace_macros doesn't work if there's an error during expansion)bjorn3-0/+13
2017-08-15use field init shorthand EVERYWHEREZack M. Davis-7/+8
Like #43008 (f668999), but _much more aggressive_.
2017-08-12syntax: #[allow_internal_unsafe] bypasses the unsafe_code lint in macros.Eduard-Mihai Burtescu-7/+20
2017-08-07Reexport all SyntaxExtension variantsOliver Schneider-9/+9
2017-07-28syntax: Add `tokens: Option<TokenStream>` to ItemAlex Crichton-0/+1
This commit adds a new field to the `Item` AST node in libsyntax to optionally contain the original token stream that the item itself was parsed from. This is currently `None` everywhere but is intended for use later with procedural macros.
2017-07-25Stabilize the `compile_error_macro` featureAlex Crichton-1/+0
Stabilizes: * `compile_error!` as a macro defined by rustc Closes #40872
2017-07-20Use the macro structure spans instead of the invocationEsteban Küber-0/+1
2017-06-26Add `LazyTokenStream`.Jeffrey Seyfried-30/+10
2017-06-26Simplify `hygiene::Mark` application, andJeffrey Seyfried-20/+16
remove variant `Token::SubstNt` in favor of `quoted::TokenTree::MetaVar`.
2017-06-19Add compile_error!Wesley Wiser-0/+1
Related to #40872
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