Alex Crichton d4d276faaf Rollup merge of #38842 - abonander:proc_macro_attribute, r=jseyfried ... Implement `#[proc_macro_attribute]` This implements `#[proc_macro_attribute]` as described in https://github.com/rust-lang/rfcs/pull/1566 The following major (hopefully non-breaking) changes are included: * Refactor `proc_macro::TokenStream` to use `syntax::tokenstream::TokenStream`. * `proc_macro::tokenstream::TokenStream` no longer emits newlines between items, this can be trivially restored if desired * `proc_macro::TokenStream::from_str` does not try to parse an item anymore, moved to `impl MultiItemModifier for CustomDerive` with more informative error message * Implement `#[proc_macro_attribute]`, which expects functions of the kind `fn(TokenStream, TokenStream) -> TokenStream` * Reactivated `#![feature(proc_macro)]` and gated `#[proc_macro_attribute]` under it * `#![feature(proc_macro)]` and `#![feature(custom_attribute)]` are mutually exclusive * adding `#![feature(proc_macro)]` makes the expansion pass assume that any attributes that are not built-in, or introduced by existing syntax extensions, are proc-macro attributes * Fix `feature_gate::find_lang_feature_issue()` to not use `unwrap()` * This change wasn't necessary for this PR, but it helped debugging a problem where I was using the wrong feature string. * Move "completed feature gate checking" pass to after "name resolution" pass * This was necessary for proper feature-gating of `#[proc_macro_attribute]` invocations when the `proc_macro` feature flag isn't set. Prototype/Litmus Test: [Implementation](https://github.com/abonander/anterofit/blob/proc_macro/service-attr/src/lib.rs#L13) -- [Usage](https://github.com/abonander/anterofit/blob/proc_macro/service-attr/examples/post_service.rs#L35)		2017-01-20 08:34:30 -08:00
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deriving	Rollup merge of #38842 - abonander:proc_macro_attribute, r=jseyfried	2017-01-20 08:34:30 -08:00
asm.rs	Use Symbol instead of InternedString in the AST, HIR, and various other places.	2016-11-21 09:00:55 +00:00
Cargo.toml	rustc: Rename rustc_macro to proc_macro	2016-10-06 11:07:23 -07:00
cfg.rs	Move CrateConfig from Crate to ParseSess.	2016-10-29 07:52:58 +00:00
concat.rs	Use Symbol instead of InternedString in the AST, HIR, and various other places.	2016-11-21 09:00:55 +00:00
concat_idents.rs	Refactor how global paths are represented (for both ast and hir).	2016-12-22 06:14:35 +00:00
env.rs	Use Symbol instead of InternedString in the AST, HIR, and various other places.	2016-11-21 09:00:55 +00:00
format.rs	Use Symbol instead of InternedString in the AST, HIR, and various other places.	2016-11-21 09:00:55 +00:00
format_foreign.rs	Add foreign formatting directive detection.	2016-11-11 15:23:15 +11:00
lib.rs	Implement #[proc_macro_attribute]	2017-01-16 22:41:22 -08:00
log_syntax.rs	make emit_feature_err take a ParseSess	2016-09-26 07:07:41 +02:00
proc_macro_impl.rs	Implement #[proc_macro_attribute]	2017-01-16 22:41:22 -08:00
proc_macro_registrar.rs	Implement #[proc_macro_attribute]	2017-01-16 22:41:22 -08:00
trace_macros.rs	Move syntax::util::interner -> syntax::symbol, cleanup.	2016-11-20 23:40:20 +00:00