Aaron Hill f9025512e7 Add SEMICOLON_IN_EXPRESSIONS_FROM_MACROS lint ... cc #79813 This PR adds an allow-by-default future-compatibility lint `SEMICOLON_IN_EXPRESSIONS_FROM_MACROS`. It fires when a trailing semicolon in a macro body is ignored due to the macro being used in expression position: ```rust macro_rules! foo { () => { true; // WARN } } fn main() { let val = match true { true => false, _ => foo!() }; } ``` The lint takes its level from the macro call site, and can be allowed for a particular macro by adding `#[allow(semicolon_in_expressions_from_macros)]`. The lint is set to warn for all internal rustc crates (when being built by a stage1 compiler). After the next beta bump, we can enable the lint for the bootstrap compiler as well.		2021-01-28 08:51:43 -05:00
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macro_check.rs	Fix some more clippy warnings	2020-10-30 10:12:56 -04:00
macro_parser.rs	Use Option::map_or instead of .map(..).unwrap_or(..)	2021-01-14 19:23:59 +01:00
macro_rules.rs	Add SEMICOLON_IN_EXPRESSIONS_FROM_MACROS lint	2021-01-28 08:51:43 -05:00
quoted.rs	Use Option::map_or instead of .map(..).unwrap_or(..)	2021-01-14 19:23:59 +01:00
transcribe.rs	rustc_ast: visit_mac -> visit_mac_call	2020-11-03 23:39:51 +03:00