feat: Add StructDefinition::name (#5960)

# Description

## Problem\*

Resolves #5958

## Summary\*

Adds `StructDefinition::name`

## Additional Context



## Documentation\*

Check one:
- [ ] No documentation needed.
- [x] Documentation included in this PR.
- [ ] **[For Experimental Features]** Documentation to be submitted in a
separate PR.

# PR Checklist\*

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

compiler/noirc_frontend/src/hir/comptime/interpreter/builtin.rs

@@ -147,6 +147,7 @@ impl<'local, 'context> Interpreter<'local, 'context> {
                 struct_def_has_named_attribute(interner, arguments, location)
             }
             "struct_def_module" => struct_def_module(self, arguments, location),
+            "struct_def_name" => struct_def_name(interner, arguments, location),
             "struct_def_set_fields" => struct_def_set_fields(interner, arguments, location),
             "to_le_radix" => to_le_radix(arguments, return_type, location),
             "trait_constraint_eq" => trait_constraint_eq(interner, arguments, location),
@@ -423,6 +424,20 @@ fn struct_def_module(
     Ok(Value::ModuleDefinition(parent))
 }
 
+// fn name(self) -> Quoted
+fn struct_def_name(
+    interner: &NodeInterner,
+    arguments: Vec<(Value, Location)>,
+    location: Location,
+) -> IResult<Value> {
+    let self_argument = check_one_argument(arguments, location)?;
+    let struct_id = get_struct(self_argument)?;
+    let the_struct = interner.get_struct(struct_id);
+
+    let name = Token::Ident(the_struct.borrow().name.to_string());
+    Ok(Value::Quoted(Rc::new(vec![name])))
+}
+
 /// fn set_fields(self, new_fields: [(Quoted, Type)]) {}
 /// Returns (name, type) pairs of each field of this StructDefinition
 fn struct_def_set_fields(

docs/docs/noir/standard_library/meta/struct_def.md

@@ -62,6 +62,15 @@ Returns true if this struct has a custom attribute with the given name.
 
 Returns the module where the struct is defined.
 
+### name
+
+#include_code name noir_stdlib/src/meta/struct_def.nr rust
+
+Returns the name of this struct
+
+Note that the returned quoted value will be just the struct name, it will
+not be the full path to the struct, nor will it include any generics.
+
 ### set_fields
 
 #include_code set_fields noir_stdlib/src/meta/struct_def.nr rust

noir_stdlib/src/meta/struct_def.nr

@@ -34,6 +34,11 @@ impl StructDefinition {
     fn module(self) -> Module {}
     // docs:end:module
 
+    #[builtin(struct_def_name)]
+    // docs:start:name
+    fn name(self) -> Quoted {}
+    // docs:end:name
+
     /// Sets the fields of this struct to the given fields list.
     /// All existing fields of the struct will be overridden with the given fields.
     /// Each element of the fields list corresponds to the name and type of a field.

test_programs/compile_success_empty/comptime_struct_definition/src/main.nr

@@ -13,6 +13,7 @@ comptime fn my_comptime_fn(typ: StructDefinition) {
     let _ = typ.as_type();
     assert_eq(typ.generics().len(), 3);
     assert_eq(typ.fields().len(), 2);
+    assert_eq(typ.name(), quote { MyType });
 }
 
 comptime fn mutate_struct_fields(s: StructDefinition) {