Add `all` `any` and `not` attribute completions

Example
---
`#[cfg($0)]` -> `#[cfg(any($0))]`

2 files changed, 56 insertions, 6 deletions

diff --git a/src/tools/rust-analyzer/crates/ide-completion/src/completions/attribute/cfg.rs b/src/tools/rust-analyzer/crates/ide-completion/src/completions/attribute/cfg.rs
index 1676a8467c8..b2e8efde8be 100644
--- a/src/tools/rust-analyzer/crates/ide-completion/src/completions/attribute/cfg.rs
+++ b/src/tools/rust-analyzer/crates/ide-completion/src/completions/attribute/cfg.rs
@@ -53,15 +53,33 @@ pub(crate) fn complete_cfg(acc: &mut Completions, ctx: &CompletionContext<'_>) {
                 acc.add(item.build(ctx.db));
             }),
         },
-        None => ctx.krate.potential_cfg(ctx.db).get_cfg_keys().cloned().unique().for_each(|s| {
-            let s = s.as_str();
-            let item =
-                CompletionItem::new(SymbolKind::BuiltinAttr, ctx.source_range(), s, ctx.edition);
-            acc.add(item.build(ctx.db));
-        }),
+        None => ctx
+            .krate
+            .potential_cfg(ctx.db)
+            .get_cfg_keys()
+            .unique()
+            .map(|s| (s.as_str(), ""))
+            .chain(CFG_CONDITION.iter().copied())
+            .for_each(|(s, snippet)| {
+                let mut item = CompletionItem::new(
+                    SymbolKind::BuiltinAttr,
+                    ctx.source_range(),
+                    s,
+                    ctx.edition,
+                );
+                if let Some(cap) = ctx.config.snippet_cap
+                    && !snippet.is_empty()
+                {
+                    item.insert_snippet(cap, snippet);
+                }
+                acc.add(item.build(ctx.db));
+            }),
     }
 }
 
+const CFG_CONDITION: &[(&str, &str)] =
+    &[("all", "all($0)"), ("any", "any($0)"), ("not", "not($0)")];
+
 const KNOWN_ARCH: [&str; 20] = [
     "aarch64",
     "arm",
diff --git a/src/tools/rust-analyzer/crates/ide-completion/src/tests/attribute.rs b/src/tools/rust-analyzer/crates/ide-completion/src/tests/attribute.rs
index 30e1e108c6c..1d2a9c7c8d3 100644
--- a/src/tools/rust-analyzer/crates/ide-completion/src/tests/attribute.rs
+++ b/src/tools/rust-analyzer/crates/ide-completion/src/tests/attribute.rs
@@ -815,7 +815,10 @@ mod cfg {
 #[cfg($0)]
 "#,
             expect![[r#"
+                ba all
+                ba any
                 ba dbg
+                ba not
                 ba opt_level
                 ba test
                 ba true
@@ -827,7 +830,10 @@ mod cfg {
 #[cfg(b$0)]
 "#,
             expect![[r#"
+                ba all
+                ba any
                 ba dbg
+                ba not
                 ba opt_level
                 ba test
                 ba true
@@ -843,7 +849,10 @@ mod cfg {
 #[cfg_attr($0)]
 "#,
             expect![[r#"
+                ba all
+                ba any
                 ba dbg
+                ba not
                 ba opt_level
                 ba test
                 ba true
@@ -855,7 +864,10 @@ mod cfg {
 #[cfg_attr(b$0)]
 "#,
             expect![[r#"
+                ba all
+                ba any
                 ba dbg
+                ba not
                 ba opt_level
                 ba test
                 ba true
@@ -867,7 +879,10 @@ mod cfg {
 #[cfg_attr($0, allow(deprecated))]
 "#,
             expect![[r#"
+                ba all
+                ba any
                 ba dbg
+                ba not
                 ba opt_level
                 ba test
                 ba true
@@ -879,7 +894,10 @@ mod cfg {
 #[cfg_attr(b$0, allow(deprecated))]
 "#,
             expect![[r#"
+                ba all
+                ba any
                 ba dbg
+                ba not
                 ba opt_level
                 ba test
                 ba true
@@ -904,6 +922,20 @@ mod cfg {
             "#]],
         );
     }
+
+    #[test]
+    fn inside_conditional() {
+        check_edit(
+            "all",
+            r#"
+//- /main.rs cfg:test,dbg=false,opt_level=2
+#[cfg($0)]
+"#,
+            r#"
+#[cfg(all($0))]
+"#,
+        );
+    }
 }
 
 mod derive {