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| author | Nicholas Nethercote <n.nethercote@gmail.com> | 2023-11-08 17:05:44 +1100 |
|---|---|---|
| committer | Nicholas Nethercote <n.nethercote@gmail.com> | 2023-11-10 10:54:21 +1100 |
| commit | 49908b4d90688bea6edb5ef811d78e61ba3aa5f3 (patch) | |
| tree | e4ec7ad15d6cb4b3b0986b2d5ae19fe592ce95f7 /compiler/rustc_macros/src/lib.rs | |
| parent | fdaaaf9f923281ab98b865259aa40fbf93d72c7a (diff) | |
| download | rust-49908b4d90688bea6edb5ef811d78e61ba3aa5f3.tar.gz rust-49908b4d90688bea6edb5ef811d78e61ba3aa5f3.zip | |
Simplify the `current_rustc_version` macro.
It currently has the syntax
`current_rustc_version!(env!("CFG_RELEASE"))` where the
`env!("CFG_RELEASE")` part looks like a normal expression but it is
actually parsed and processed by the `current_rustc_version` macro.
The documented rationale for this is that you'll find it if you grep for
`env!("CFG_RELEASE")`. But I think that's of very little use -- I would
personally grep for just "CFG_RELEASE" -- and it complicates the macro,
requiring the use of `syn`.
This commit simplifies the macro.
Diffstat (limited to 'compiler/rustc_macros/src/lib.rs')
| -rw-r--r-- | compiler/rustc_macros/src/lib.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_macros/src/lib.rs b/compiler/rustc_macros/src/lib.rs index 193dbd75fbd..a6666636032 100644 --- a/compiler/rustc_macros/src/lib.rs +++ b/compiler/rustc_macros/src/lib.rs @@ -26,6 +26,9 @@ mod symbols; mod type_foldable; mod type_visitable; +// Reads the rust version (e.g. "1.75.0") from the CFG_RELEASE env var and +// produces a `RustcVersion` literal containing that version (e.g. +// `RustcVersion { major: 1, minor: 75, patch: 0 }`). #[proc_macro] pub fn current_rustc_version(input: TokenStream) -> TokenStream { current_version::current_version(input) |