kennytm 117eb68122 Rollup merge of #47655 - etaoins:fix-spurious-warning-on-empty-proc-macro-crate, r=alexcrichton ... Fix spurious warning on empty proc macro crates While attempting to reproduce rust-lang/rust#47086 I noticed the following warning: ```shell > rustc /dev/null --crate-type proc-macro warning: unused variable: `registrar` --> /dev/null:0:1 ``` As there are no macros to register the automatically generated registrar function for the crate has no body. As a result its `registrar` argument is unused triggering the above warning. The warning is confusing and not easily actionable by the developer. It could also be triggered legitimately by e.g. having all of the macros in a crate #[cfg]'ed out. Fix by naming the generated argument `_registrar` inside `mk_registrar()`. This suppresses the unused variable warning.		2018-01-23 22:30:58 +08:00
..
deriving	Implement repr(transparent)	2018-01-16 08:58:32 +01:00
asm.rs	use field init shorthand EVERYWHERE	2017-08-15 15:29:17 -07:00
Cargo.toml	Move unused-extern-crate to late pass	2017-08-27 19:02:24 +09:00
cfg.rs	Produce expansion info for more builtin macros	2017-09-04 11:03:19 +02:00
compile_error.rs	Stabilize the compile_error_macro feature	2017-07-25 07:09:31 -07:00
concat_idents.rs	Produce expansion info for more builtin macros	2017-09-04 11:03:19 +02:00
concat.rs	Produce expansion info for more builtin macros	2017-09-04 11:03:19 +02:00
env.rs	Produce expansion info for more builtin macros	2017-09-04 11:03:19 +02:00
format_foreign.rs	Use Try syntax for Option in place of macros or match	2017-12-09 14:18:33 -08:00
format.rs	Add secondary span pointing at the statement (error span)	2018-01-16 18:13:43 -08:00
global_asm.rs	use field init shorthand EVERYWHERE	2017-08-15 15:29:17 -07:00
lib.rs	Use hygiene to access the injected crate (core or std) from builtin macros.	2017-12-09 17:22:07 -08:00
log_syntax.rs	make emit_feature_err take a ParseSess	2016-09-26 07:07:41 +02:00
proc_macro_impl.rs	Simplify hygiene::Mark application, and	2017-06-26 02:05:45 +00:00
proc_macro_registrar.rs	Fix spurious warning on empty proc macro crates	2018-01-22 21:09:14 +11:00
trace_macros.rs	Move syntax::util::interner -> syntax::symbol, cleanup.	2016-11-20 23:40:20 +00:00