array reflection

std/meta/meta.bro

@@ -1,6 +1,8 @@
-Layout :: enum {
-	auto
-	c
+Layout :: enum { auto c }
+
+ArrayInfo :: struct {
+	child type
+	len usize
 }
 
 FieldInfo :: struct {
@@ -28,7 +30,7 @@ TypeInfo :: union(enum) {
 	bool void
 	integer void
 	float void
-	array void
+	array ArrayInfo
 	pointer void
 	slice void
 	range void

std/meta/meta.test.bro

@@ -7,6 +7,22 @@ TestTokenKind :: enum(u8) {
 }
 
 TestNames :: alias EnumFieldStruct(TestTokenKind, ?[]u8, some!(null))
+TestArrayAlias :: alias [3]u16
+
+hide array_info_matches func($Array, $Child type, $len usize) bool {
+	match typeinfo!(Array) {
+		.array |info|: return info.child == Child and info.len == len
+		else: return false
+	}
+}
+
+array_reflection_exposes_child_and_logical_length test {
+	try testing.expect($(array_info_matches([4]i32, i32, 4)))
+	try testing.expect($(array_info_matches([0]bool, bool, 0)))
+	try testing.expect($(array_info_matches(TestArrayAlias, u16, 3)))
+	try testing.expect($(array_info_matches([2]mut i64, i64, 2)))
+	try testing.expect($(array_info_matches([2;0]u8, u8, 2)))
+}
 
 enum_field_struct_defaults test {
 	names TestNames = {