Chore: Add witness hint for enum_tuple_variant_field_missing lint

src/lints/enum_tuple_variant_field_missing.ron

@@ -34,6 +34,8 @@ SemverQuery(
                                         end_line @output
                                     }
                                 }
+
+                                field @fold @transform(op: "count") @output(name: "field_count")
                             }
                         }
                     }
@@ -72,4 +74,10 @@ SemverQuery(
     },
     error_message: "A field of a tuple variant in a pub enum has been removed.",
     per_result_error_template: Some("field {{field_name}} of variant {{enum_name}}::{{variant_name}}, previously in file {{span_filename}}:{{span_begin_line}}"),
+    witness: (
+        hint_template: r#"match value {
+    {{ join "::" path }}::{{ variant_name }}({{#repeat field_count }}{{#if (eq (to_string @index) ../field_name) }}witness{{else}}_{{/if}}{{#unless @last}}, {{/unless}}{{/repeat}}) => (),
+    _ => (),
+}"#,
+    ),
 )

test_outputs/query_execution/enum_tuple_variant_field_missing.snap

@@ -7,6 +7,7 @@ snapshot_kind: text
   "./test_crates/enum_struct_field_hidden_from_public_api/": [
     {
       "enum_name": String("RemovedHiddenFieldFromVariant"),
+      "field_count": Uint64(4),
       "field_name": String("3"),
       "path": List([
         String("enum_struct_field_hidden_from_public_api"),
@@ -21,6 +22,7 @@ snapshot_kind: text
   "./test_crates/enum_tuple_variant_field_missing/": [
     {
       "enum_name": String("PublicEnum"),
+      "field_count": Uint64(3),
       "field_name": String("2"),
       "path": List([
         String("enum_tuple_variant_field_missing"),

test_outputs/witnesses/enum_tuple_variant_field_missing.snap

@@ -0,0 +1,23 @@
+---
+source: src/query.rs
+assertion_line: 847
+description: "Lint `enum_tuple_variant_field_missing` did not have the expected witness output.\nSee https://github.com/obi1kenobi/cargo-semver-checks/blob/main/CONTRIBUTING.md#testing-witnesses\nfor more information."
+expression: "&actual_witnesses"
+---
+[["./test_crates/enum_struct_field_hidden_from_public_api/"]]
+filename = 'src/lib.rs'
+begin_line = 38
+hint = '''
+match value {
+    enum_struct_field_hidden_from_public_api::RemovedHiddenFieldFromVariant::VisibleTupleVariantBreaking(_, _, _, witness) => (),
+    _ => (),
+}'''
+
+[["./test_crates/enum_tuple_variant_field_missing/"]]
+filename = 'src/lib.rs'
+begin_line = 5
+hint = '''
+match value {
+    enum_tuple_variant_field_missing::PublicEnum::TupleVariantWithMissingField(_, _, witness) => (),
+    _ => (),
+}'''