Auto merge of #132555 - matthiaskrgr:rollup-2d79661, r=matthiaskrgr

Rollup of 15 pull requests

Successful merges:

 - #129329 (Implement `From<&mut {slice}>` for `Box/Rc/Arc<{slice}>`)
 - #131377 (Add LowerExp and UpperExp implementations to NonZero)
 - #132393 (Docs: added brief colon explanation)
 - #132437 (coverage: Regression test for inlining into an uninstrumented crate)
 - #132499 (unicode_data.rs: show command for generating file)
 - #132503 (better test for const HashMap; remove const_hash leftovers)
 - #132511 (stabilize const_arguments_as_str)
 - #132520 (NFC add known bug nr to test)
 - #132522 (make codegen help output more consistent)
 - #132523 (Added regression test for generics index out of bounds)
 - #132528 (Use `*_opt` typeck results fns to not ICE in fallback suggestion)
 - #132537 (PassWrapper: adapt for llvm/llvm-project@5445edb5d)
 - #132540 (Do not format generic consts)
 - #132543 (add and update some crashtests)
 - #132550 (compiler: Continue introducing rustc_abi to the compiler)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

Cargo.lock

@@ -3346,6 +3346,7 @@ dependencies = [
  "either",
  "itertools",
  "polonius-engine",
+ "rustc_abi",
  "rustc_data_structures",
  "rustc_errors",
  "rustc_fluent_macro",
@@ -3359,7 +3360,6 @@ dependencies = [
  "rustc_mir_dataflow",
  "rustc_session",
  "rustc_span",
- "rustc_target",
  "rustc_trait_selection",
  "rustc_traits",
  "smallvec",
@@ -3706,6 +3706,7 @@ name = "rustc_hir"
 version = "0.0.0"
 dependencies = [
  "odht",
+ "rustc_abi",
  "rustc_arena",
  "rustc_ast",
  "rustc_data_structures",
@@ -4131,6 +4132,7 @@ dependencies = [
 name = "rustc_monomorphize"
 version = "0.0.0"
 dependencies = [
+ "rustc_abi",
  "rustc_data_structures",
  "rustc_errors",
  "rustc_fluent_macro",
@@ -4335,6 +4337,7 @@ name = "rustc_sanitizers"
 version = "0.0.0"
 dependencies = [
  "bitflags 2.6.0",
+ "rustc_abi",
  "rustc_data_structures",
  "rustc_hir",
  "rustc_middle",
@@ -4467,6 +4470,7 @@ name = "rustc_trait_selection"
 version = "0.0.0"
 dependencies = [
  "itertools",
+ "rustc_abi",
  "rustc_ast",
  "rustc_ast_ir",
  "rustc_attr",
@@ -4483,7 +4487,6 @@ dependencies = [
  "rustc_serialize",
  "rustc_session",
  "rustc_span",
- "rustc_target",
  "rustc_transmute",
  "rustc_type_ir",
  "smallvec",

compiler/rustc_ast/src/ast.rs

@@ -414,6 +414,12 @@ pub struct WhereClause {
     pub span: Span,
 }
 
+impl WhereClause {
+    pub fn is_empty(&self) -> bool {
+        !self.has_where_token && self.predicates.is_empty()
+    }
+}
+
 impl Default for WhereClause {
     fn default() -> WhereClause {
         WhereClause { has_where_token: false, predicates: ThinVec::new(), span: DUMMY_SP }