Rust: Implement toString for struct fields and visibility

Author: paldepind

rust/ql/.generated.list

@@ -29,5 +29,17 @@ module Impl {
 
     /** Holds if this record field is named `name` and belongs to the struct `s`. */
     predicate isStructField(Struct s, string name) { this = s.getStructField(name) }
+
+    override string toStringImpl() { result = concat(int i | | this.toStringPart(i) order by i) }
+
+    private string toStringPart(int index) {
+      index = 0 and result = this.getVisibility().toAbbreviatedString() + " "
+      or
+      index = 1 and result = this.getName().getText()
+      or
+      index = 2 and result = ": "
+      or
+      index = 3 and result = this.getTypeRepr().toAbbreviatedString()
+    }
   }
 }

rust/ql/.gitattributes

@@ -1,4 +1,3 @@
-// generated by codegen, remove this comment if you wish to edit this file
 /**
  * This module provides a hand-modifiable wrapper around the generated class `Visibility`.
  *
@@ -12,6 +11,7 @@ private import codeql.rust.elements.internal.generated.Visibility
  * be referenced directly.
  */
 module Impl {
+  // the following QLdoc is generated: if you need to edit it, do it in the schema file
   /**
    * A visibility modifier.
    *
@@ -21,5 +21,13 @@ module Impl {
    * //^^^
    * ```
    */
-  class Visibility extends Generated::Visibility { }
+  class Visibility extends Generated::Visibility {
+    override string toStringImpl() { result = this.toAbbreviatedString() }
+
+    override string toAbbreviatedString() {
+      result = "pub(" + this.getPath().toAbbreviatedString() + ")"
+      or
+      not this.hasPath() and result = "pub"
+    }
+  }
 }