iter 22-tidy.6.2: write_fn_def renders forall class constraints

2026-05-10 04:58:01 +02:00
parent 788c9808dd
commit 51011511b4
3 changed files with 37 additions and 4 deletions
@@ -238,9 +238,11 @@ fn write_fn_def(out: &mut String, fd: &FnDef, level: usize) {
    // `Type::Fn` or a `Type::Forall` wrapping one — in the latter case
    // we render the forall on the line above and then the inner fn
    // signature.
-    let (forall_vars, fn_ty) = match &fd.ty {
-        Type::Forall { vars, constraints: _, body } => (Some(vars.clone()), body.as_ref()),
-        other => (None, other),
+    let (forall_vars, forall_constraints, fn_ty) = match &fd.ty {
+        Type::Forall { vars, constraints, body } => {
+            (Some(vars.clone()), constraints.clone(), body.as_ref())
+        }
+        other => (None, Vec::new(), other),
    };

    if let Some(vars) = &forall_vars {
@@ -252,7 +254,19 @@ fn write_fn_def(out: &mut String, fd: &FnDef, level: usize) {
            }
            out.push_str(v);
        }
-        out.push_str(">\n");
+        out.push('>');
+        if !forall_constraints.is_empty() {
+            out.push_str(" where ");
+            for (i, c) in forall_constraints.iter().enumerate() {
+                if i > 0 {
+                    out.push_str(", ");
+                }
+                out.push_str(&c.class);
+                out.push(' ');
+                write_type(out, &c.type_);
+            }
+        }
+        out.push('\n');
    }

    indent(out, level);