fix for latest zig

src/chunk.zig

@@ -170,7 +170,7 @@ pub const Chunk = struct {
             const v2: u8 = @intCast(u8, (idx_u24 >> 8) & mask);
             const v3: u8 = @intCast(u8, (idx_u24 >> 16) & mask);
 
-            return ConstantIndex{ .Long = []u8{ v3, v2, v1 } };
+            return ConstantIndex{ .Long = [_]u8{ v3, v2, v1 } };
         }
     }
 

src/compiler.zig

@@ -48,7 +48,7 @@ const ParseRule = struct {
 };
 
 /// For each token, this defines a parse rule for it.
-var rules = []ParseRule{
+var rules = [_]ParseRule{
     // for LEFT_PAREN, we determine it as a call precedence
     // plus a prefix parse function of grouping
     ParseRule{ .prefix = Compiler.grouping, .precedence = .Call },
@@ -150,7 +150,7 @@ pub const Compiler = struct {
             .vmach = vmach,
 
             // local variable resolution
-            .locals = []Local{Local{
+            .locals = [_]Local{Local{
                 .name = Token{},
                 .depth = -1,
             }} ** 256,

src/main.zig

@@ -94,8 +94,7 @@ fn runPrompt(allocator: *Allocator) !void {
 }
 
 pub fn main() anyerror!void {
-    var da = std.heap.DirectAllocator.init();
+    var arena = std.heap.ArenaAllocator.init(std.heap.direct_allocator);
-    var arena = std.heap.ArenaAllocator.init(&da.allocator);
     defer arena.deinit();
     var allocator = &arena.allocator;
 
@@ -115,8 +114,7 @@ pub fn main() anyerror!void {
 }
 
 pub fn oldMain() !void {
-    var da = std.heap.DirectAllocator.init();
+    var arena = std.heap.ArenaAllocator.init(std.heap.direct_allocator);
-    var arena = std.heap.ArenaAllocator.init(&da.allocator);
     defer arena.deinit();
     var allocator = &arena.allocator;
 

src/scanner.zig

@@ -32,7 +32,7 @@ pub const KeywordMap = std.AutoHashMap([]const u8, u6);
 fn initKeywordMap(allocator: *std.mem.Allocator) !KeywordMap {
     var map = KeywordMap.init(allocator);
 
-    const keywords = [][]const u8{
+    const keywords = [_][]const u8{
         "and"[0..],
         "class"[0..],
         "else"[0..],
@@ -51,7 +51,7 @@ fn initKeywordMap(allocator: *std.mem.Allocator) !KeywordMap {
         "while"[0..],
     };
 
-    const tags = []TokenType{
+    const tags = [_]TokenType{
         TokenType.AND,
         TokenType.CLASS,
         TokenType.ELSE,

src/vm.zig

@@ -166,7 +166,7 @@ pub const VM = struct {
         var res_str = try std.mem.join(
             self.allocator,
             "",
-            [][]u8{ a, b },
+            [_][]u8{ a, b },
         );
 
         var val = values.ObjVal(try objects.takeString(self, res_str));