Add annotation attribute constant pool info getters

src/Class/AttributeInfo.zig

@@ -730,6 +730,11 @@ pub const StackMapTable = struct {
                         .offset_delta = try input.takeInt(u16, .big),
                     },
                 },
+                251 => .{
+                    .same_frame_extended = .{
+                        .offset_delta = try input.takeInt(u16, .big),
+                    },
+                },
                 252...254 => blk: {
                     const offset_delta = try input.takeInt(u16, .big);
 
@@ -796,12 +801,8 @@ pub const StackMapTable = struct {
         long,
         null,
         uninitialized_this,
-        object: struct {
-            cpool_index: u16,
-        },
-        uninitialized: struct {
-            cpool_index: u16,
-        },
+        object: Object,
+        uninitialized: Uninitialized,
 
         pub const Tag = enum(u8) {
             top = 0,
@@ -815,6 +816,18 @@ pub const StackMapTable = struct {
             uninitialized = 8,
         };
 
+        pub const Object = struct {
+            cpool_index: u16,
+
+            pub fn class(self: *const Object, constant_pool: ConstantPool) ResolveError!ConstantPool.Info {
+                return constant_pool.getTag(self.cpool_index, .class);
+            }
+        };
+
+        pub const Uninitialized = struct {
+            offset: u16,
+        };
+
         pub fn parse(input: *std.Io.Reader) ParseError!VerificationTypeInfo {
             const tag_byte = try input.takeByte();
             const tag = std.enums.fromInt(StackMapTable.VerificationTypeInfo.Tag, tag_byte) orelse return ParseError.InvalidTag;
@@ -1301,12 +1314,20 @@ pub const ElementValue = union(enum) {
 pub const ElementValuePair = struct {
     element_name_index: u16,
     value: ElementValue,
+
+    const Self = @This();
+
+    pub fn elementName(self: *const Self, constant_pool: ConstantPool) ResolveError!ConstantPool.Info {
+        return constant_pool.getTag(self.element_name_index, .utf8);
+    }
 };
 
 pub const Annotation = struct {
     type_index: u16,
     element_value_pairs: []ElementValuePair,
 
+    const Self = @This();
+
     pub fn parse(input: *std.Io.Reader, allocator: std.mem.Allocator) ParseError!Annotation {
         const type_index = try input.takeInt(u16, .big);
 
@@ -1332,6 +1353,10 @@ pub const Annotation = struct {
         }
         allocator.free(self.element_value_pairs);
     }
+
+    pub fn @"type"(self: *const Self, constant_pool: ConstantPool) ResolveError!ConstantPool.Info {
+        return constant_pool.getTag(self.type_index, .utf8);
+    }
 };
 
 pub const RuntimeVisibleAnnotations = struct {