Add explicit none() value variant in check-cfg

2023-12-29 23:16:10 +01:00
parent 5876c8cdfd
commit 15078c25d6
12 changed files with 101 additions and 6 deletions
--- a/compiler/rustc_interface/src/interface.rs
+++ b/compiler/rustc_interface/src/interface.rs
@@ -199,8 +199,15 @@ pub(crate) fn parse_check_cfg(dcx: &DiagCtxt, specs: Vec<String>) -> CheckCfg {
                        if !args.is_empty() {
                            error!("`any()` must be empty");
                        }
+                    } else if arg.has_name(sym::none)
+                        && let Some(args) = arg.meta_item_list()
+                    {
+                        values.insert(None);
+                        if !args.is_empty() {
+                            error!("`none()` must be empty");
+                        }
                    } else {
-                        error!("`values()` arguments must be string literals or `any()`");
+                        error!("`values()` arguments must be string literals, `none()` or `any()`");
                    }
                }
            } else {