Expand the version placeholder to the current version in stability attribute parsing

est31 · est31 · commit 7a5b1d7939a3 · 2022-08-27T17:08:52.000+02:00
That way, the current version is shown in rustdoc etc.
diff --git a/compiler/rustc_passes/src/lib_features.rs b/compiler/rustc_passes/src/lib_features.rs
@@ -54,6 +54,14 @@ impl<'tcx> LibFeatureCollector<'tcx> {
                         }
                     }
                 }
+                const VERSION_PLACEHOLDER: &str = "CURRENT_RUSTC_VERSION";
+
+                if let Some(s) = since && s.as_str() == VERSION_PLACEHOLDER {
+                    let version = option_env!("CFG_VERSION").unwrap_or("<current>");
+                    let version = version.split(' ').next().unwrap();
+                    since = Some(Symbol::intern(&version));
+                }
+
                 if let Some(feature) = feature {
                     // This additional check for stability is to make sure we
                     // don't emit additional, irrelevant errors for malformed

Original file line number	Diff line number	Diff line change
`@@ -54,6 +54,14 @@ impl<'tcx> LibFeatureCollector<'tcx> {`
`54`	`54`	`}`
`55`	`55`	`}`
`56`	`56`	`}`
	`57`	`+ const VERSION_PLACEHOLDER: &str = "CURRENT_RUSTC_VERSION";`
	`58`	`+`
	`59`	`+ if let Some(s) = since && s.as_str() == VERSION_PLACEHOLDER {`
	`60`	`+ let version = option_env!("CFG_VERSION").unwrap_or("<current>");`
	`61`	`+ let version = version.split(' ').next().unwrap();`
	`62`	`+ since = Some(Symbol::intern(&version));`
	`63`	`+ }`
	`64`	`+`
`57`	`65`	`if let Some(feature) = feature {`
`58`	`66`	`// This additional check for stability is to make sure we`
`59`	`67`	`// don't emit additional, irrelevant errors for malformed`