update std.meta.FieldType to @FieldType

Author: Techatrix

src/MetaModel.zig

@@ -91,7 +91,7 @@ pub const MapKeyType = union(enum) {
             kind: []const u8,
             name: []const u8,
         }, allocator, source, options);
-        const NameEnum = std.meta.FieldType(std.meta.FieldType(@This(), .base), .name);
+        const NameEnum = @FieldType(@FieldType(@This(), "base"), "name");
         if (std.mem.eql(u8, result.kind, "base")) {
             return .{ .reference = .{ .kind = result.kind, .name = std.meta.stringToEnum(NameEnum, result.name) orelse return error.InvalidEnumTag } };
         } else if (std.mem.eql(u8, result.kind, "reference")) {
@@ -107,7 +107,7 @@ pub const MapKeyType = union(enum) {
         if (kind != .string) return error.UnexpectedToken;
 
         if (std.mem.eql(u8, kind.string, "base")) {
-            return .{ .base = try std.json.parseFromValueLeaky(std.meta.FieldType(@This(), .base), allocator, source, options) };
+            return .{ .base = try std.json.parseFromValueLeaky(@FieldType(@This(), "base"), allocator, source, options) };
         } else if (std.mem.eql(u8, kind.string, "reference")) {
             return .{ .reference = try std.json.parseFromValueLeaky(ReferenceType, allocator, source, options) };
         }

src/lsp.zig

@@ -304,7 +304,7 @@ pub const JsonRPCMessage = union(enum) {
             allocator: std.mem.Allocator,
             source: anytype,
             options: std.json.ParseOptions,
-        ) std.json.ParseError(@TypeOf(source.*))!std.meta.FieldType(@This(), field) {
+        ) std.json.ParseError(@TypeOf(source.*))!@FieldType(@This(), @tagName(field)) {
             return switch (field) {
                 .jsonrpc, .method => try std.json.innerParse([]const u8, allocator, source, options),
                 .id => try std.json.innerParse(?JsonRPCMessage.ID, allocator, source, options),
@@ -326,7 +326,7 @@ pub const JsonRPCMessage = union(enum) {
             allocator: std.mem.Allocator,
             source: std.json.Value,
             options: std.json.ParseOptions,
-        ) std.json.ParseFromValueError!std.meta.FieldType(@This(), field) {
+        ) std.json.ParseFromValueError!@FieldType(@This(), @tagName(field)) {
             return switch (field) {
                 .jsonrpc, .method => try std.json.innerParseFromValue([]const u8, allocator, source, options),
                 .id => try std.json.innerParseFromValue(?JsonRPCMessage.ID, allocator, source, options),