diff --git a/src/analysis.zig b/src/analysis.zig
index 1169761..bc35d32 100644
--- a/src/analysis.zig
+++ b/src/analysis.zig
@@ -25,7 +25,7 @@ pub const Analyzer = struct {
         };
     }
 
-    fn setErrContext(self: *@This(), comptime fmt: ?[]const u8, args: anytype) void {
+    fn setErrContext(self: *@This(), comptime fmt: ?[]const u8, args: var) void {
         if (fmt == null) {
             self.err_ctx = null;
             return;
@@ -42,7 +42,7 @@ pub const Analyzer = struct {
         self.err_tok = tok;
     }
 
-    fn doError(self: *@This(), comptime fmt: []const u8, args: anytype) void {
+    fn doError(self: *@This(), comptime fmt: []const u8, args: var) void {
         self.hadError = true;
 
         std.debug.warn("analysis error", .{});
@@ -80,14 +80,14 @@ pub const Analyzer = struct {
                     return null;
                 }
 
-                return switch (sym.?.*) {
+                return switch (sym.?.value.*) {
                     .Struct => SymbolUnderlyingType{ .Struct = val },
                     .Enum => SymbolUnderlyingType{ .Enum = val },
 
                     else => blk: {
                         self.doError("expected struct or enum for '{}', got {}", .{
                             val,
-                            @tagName(@as(comp.SymbolType, sym.?.*)),
+                            @tagName(@as(comp.SymbolType, sym.?.value.*)),
                         });
                         break :blk null;
                     },
@@ -257,8 +257,8 @@ pub const Analyzer = struct {
                 var symbol = try ctx.fetchGlobalSymbol(func_name, .Function);
                 var func_sym = symbol.Function;
 
-                for (call.arguments.items) |arg_expr, idx| {
-                    var param_type = func_sym.parameter_list.items[idx];
+                for (call.arguments.toSlice()) |arg_expr, idx| {
+                    var param_type = func_sym.parameter_list.at(idx);
                     var arg_type = try self.resolveExprType(ctx, &arg_expr);
 
                     self.expectSymUnTypeEqual(arg_type, param_type) catch {
@@ -314,7 +314,7 @@ pub const Analyzer = struct {
                     .Enum => |enum_identifier| {
                         // fetch an enum off symbol table, then we use the
                         // identifier map to ensure get.name exists in the enum
-                        var map = ctx.symbol_table.get(enum_identifier).?.Enum;
+                        var map = ctx.symbol_table.get(enum_identifier).?.value.Enum;
                         const name = get.name.lexeme;
 
                         var kv = map.get(name);
@@ -355,8 +355,8 @@ pub const Analyzer = struct {
                 }
 
                 var value_type = try self.resolveExprType(ctx, assign.value);
-                try self.expectSymUnTypeEqual(var_type.?, value_type);
-                return var_type.?;
+                try self.expectSymUnTypeEqual(var_type.?.value, value_type);
+                return var_type.?.value;
             },
 
             .Set => @panic("TODO analysis of Set exprs"),
@@ -411,7 +411,7 @@ pub const Analyzer = struct {
 
                 try ctx.bumpScope("if_then");
 
-                for (ifstmt.then_branch.items) |then_stmt| {
+                for (ifstmt.then_branch.toSlice()) |then_stmt| {
                     try self.stmtPass(ctx, then_stmt);
                 }
 
@@ -421,7 +421,7 @@ pub const Analyzer = struct {
                     try ctx.bumpScope("if_else");
                     defer ctx.dumpScope();
 
-                    for (else_branch.items) |else_stmt| {
+                    for (else_branch.toSlice()) |else_stmt| {
                         try self.stmtPass(ctx, else_stmt);
                     }
                 }
@@ -437,7 +437,7 @@ pub const Analyzer = struct {
 
                 try ctx.bumpScope("loop");
 
-                for (loop.then_branch.items) |then_stmt| {
+                for (loop.then_branch.toSlice()) |then_stmt| {
                     try self.stmtPass(ctx, then_stmt);
                 }
 
@@ -476,7 +476,7 @@ pub const Analyzer = struct {
                 });
 
                 var parameters = comp.TypeList.init(self.allocator);
-                for (decl.params.items) |param| {
+                for (decl.params.toSlice()) |param| {
                     var param_type = self.resolveGlobalType(ctx, param.typ.lexeme);
                     if (param_type == null) continue;
                     try parameters.append(param_type.?);
@@ -490,14 +490,14 @@ pub const Analyzer = struct {
                 // we intentionally insert the function so that:
                 //  - we can do return statement validation
                 //  - we have parameter types fully analyzed
-                if (ret_type != null and parameters.items.len == decl.params.items.len) {
+                if (ret_type != null and parameters.len == decl.params.len) {
                     try ctx.insertFn(decl, ret_type.?, parameters, scope);
                 } else {
                     if (ret_type != null)
                         self.doError("Return type was not fully resolved", .{});
 
-                    if (parameters.items.len != decl.params.items.len)
-                        self.doError("Fully analyzed {} parameters, wanted {}", .{ parameters.items.len, decl.params.items.len });
+                    if (parameters.len != decl.params.len)
+                        self.doError("Fully analyzed {} parameters, wanted {}", .{ parameters.len, decl.params.len });
 
                     return CompileError.TypeError;
                 }
@@ -507,7 +507,7 @@ pub const Analyzer = struct {
                 std.debug.assert(ctx.current_scope == null);
                 ctx.setScope(scope);
 
-                for (decl.body.items) |stmt| {
+                for (decl.body.toSlice()) |stmt| {
                     try self.stmtPass(ctx, stmt);
                 }
 
@@ -522,7 +522,7 @@ pub const Analyzer = struct {
 
                 var types = comp.TypeList.init(self.allocator);
 
-                for (struc.fields.items) |field| {
+                for (struc.fields.toSlice()) |field| {
                     self.setErrToken(field.name);
                     var field_type = self.resolveGlobalType(ctx, field.typ.lexeme);
                     if (field_type == null) continue;
@@ -534,7 +534,7 @@ pub const Analyzer = struct {
 
                 // we don't return type errors from the main loop so we can
                 // keep going and find more type errors
-                if (types.items.len == struc.fields.items.len)
+                if (types.len == struc.fields.len)
                     try ctx.insertStruct(struc, types);
             },
 
@@ -547,7 +547,7 @@ pub const Analyzer = struct {
             },
 
             .ConstDecl => |constlist| {
-                for (constlist.items) |constdecl| {
+                for (constlist.toSlice()) |constdecl| {
                     self.setErrToken(constdecl.name);
                     self.setErrContext("const {}", .{constdecl.name.lexeme});
 
@@ -566,7 +566,7 @@ pub const Analyzer = struct {
     pub fn pass(self: *@This(), root: *ast.Node) !comp.CompilationContext {
         var ctx = comp.CompilationContext.init(self.allocator);
 
-        var slice = root.Root.items;
+        var slice = root.Root.toSlice();
         for (slice) |_, idx| {
             try self.nodePass(&ctx, &slice[idx]);
         }
diff --git a/src/ast_printer.zig b/src/ast_printer.zig
index 69d7629..328f880 100644
--- a/src/ast_printer.zig
+++ b/src/ast_printer.zig
@@ -14,15 +14,15 @@ fn printIdent(ident: usize) void {
     }
 }
 
-fn print(ident: usize, comptime fmt: []const u8, args: anytype) void {
+fn print(ident: usize, comptime fmt: []const u8, args: var) void {
     printIdent(ident);
     std.debug.warn(fmt, args);
 }
 
-fn printBlock(ident: usize, block: anytype, endNewline: bool) void {
+fn printBlock(ident: usize, block: var, endNewline: bool) void {
     std.debug.warn("(\n", .{});
 
-    for (block.items) |stmt| {
+    for (block.toSlice()) |stmt| {
         printIdent(ident);
         printStmt(ident, &stmt);
         std.debug.warn("\n", .{});
@@ -53,7 +53,7 @@ pub fn printNode(node: *const Node, ident: usize) void {
                 warn("(fn {} {} (", .{ name, ret_type });
             }
 
-            for (decl.params.items) |param| {
+            for (decl.params.toSlice()) |param| {
                 warn(" ({} {})", .{ param.name.lexeme, param.typ.lexeme });
             }
             warn(") ", .{});
@@ -65,7 +65,7 @@ pub fn printNode(node: *const Node, ident: usize) void {
         .ConstDecl => |consts| {
             print(ident, "(const (\n", .{});
 
-            for (consts.items) |const_decl| {
+            for (consts.toSlice()) |const_decl| {
                 print(ident + 1, "({} ", .{
                     const_decl.name.lexeme,
                 });
@@ -80,7 +80,7 @@ pub fn printNode(node: *const Node, ident: usize) void {
         .Enum => |decl| {
             print(ident, "(enum {} (\n", .{decl.name.lexeme});
 
-            for (decl.fields.items) |field| {
+            for (decl.fields.toSlice()) |field| {
                 print(ident + 1, "{}\n", .{
                     field.lexeme,
                 });
@@ -90,14 +90,14 @@ pub fn printNode(node: *const Node, ident: usize) void {
         },
 
         .Root => {
-            for (node.Root.items) |child| {
+            for (node.Root.toSlice()) |child| {
                 printNode(&child, ident + 1);
             }
         },
 
         .Struct => |struc| {
             print(ident, "(struct {} (\n", .{struc.name.lexeme});
-            for (struc.fields.items) |field| {
+            for (struc.fields.toSlice()) |field| {
                 print(ident + 1, "({} {})\n", .{ field.name.lexeme, field.typ.lexeme });
             }
             print(ident, "))\n", .{});
@@ -156,7 +156,7 @@ fn binOpToStr(op: BinaryOperator) ?[]const u8 {
     return null;
 }
 
-fn printBinOp(inner: anytype) void {
+fn printBinOp(inner: var) void {
     std.debug.warn("({}", .{binOpToStr(inner.op)});
     printTwoExprs(inner.left, inner.right);
     std.debug.warn(")", .{});
@@ -203,7 +203,7 @@ pub fn printExpr(expr: *const Expr) void {
                 .Float => |val| std.debug.warn("{}", .{val}),
                 .String => |val| std.debug.warn("'{}'", .{val}),
                 .Array => |exprs| {
-                    parenthetize("array", exprs.items);
+                    parenthetize("array", exprs.toSlice());
                 },
                 else => |typ| std.debug.warn("UnknownLiteral-{}", .{typ}),
             }
@@ -222,7 +222,7 @@ pub fn printExpr(expr: *const Expr) void {
             std.debug.warn("(", .{});
             printExpr(call.callee);
 
-            for (call.arguments.items) |arg| {
+            for (call.arguments.toSlice()) |arg| {
                 std.debug.warn(" ", .{});
                 printExpr(&arg);
             }
@@ -233,7 +233,7 @@ pub fn printExpr(expr: *const Expr) void {
         .Struct => |val| {
             std.debug.warn("({} (", .{val.name.lexeme});
 
-            for (val.inits.items) |init| {
+            for (val.inits.toSlice()) |init| {
                 std.debug.warn(" ({} ", .{init.field.lexeme});
                 printExpr(init.expr);
                 std.debug.warn(")", .{});
@@ -345,11 +345,12 @@ fn prettyType(typ: SymbolUnderlyingType) []const u8 {
 pub fn printScope(scope: *Scope, ident: usize) void {
     print(ident, "scope '{}' at addr {}\n", .{ scope.id, @ptrToInt(scope) });
 
-    for (scope.env.items()) |entry| {
-        print(ident + 1, "sym: {}, typ: {}\n", .{ entry.key, prettyType(entry.value) });
+    var it = scope.env.iterator();
+    while (it.next()) |kv| {
+        print(ident + 1, "sym: {}, typ: {}\n", .{ kv.key, prettyType(kv.value) });
     }
 
-    for (scope.children.items) |child| {
+    for (scope.children.toSlice()) |child| {
         printScope(child, ident + 1);
     }
 }
@@ -365,11 +366,11 @@ pub fn printContext(ctx: CompilationContext) void {
                     prettyType(fn_sym.return_type),
                 });
 
-                for (fn_sym.decl.params.items) |param| {
-                    var actual_param = fn_sym.parameters.get(param.name.lexeme).?;
+                for (fn_sym.decl.params.toSlice()) |param| {
+                    var param_kv = fn_sym.parameters.get(param.name.lexeme).?;
                     std.debug.warn("\tparameter {} typ {}\n", .{
-                        param.name.lexeme,
-                        prettyType(actual_param.typ),
+                        param_kv.key,
+                        prettyType(param_kv.value.typ),
                     });
                 }
 
diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig
index f0894fb..ff2d6f6 100644
--- a/src/codegen/llvm.zig
+++ b/src/codegen/llvm.zig
@@ -46,7 +46,7 @@ pub const Codegen = struct {
             },
 
             .Struct, .Enum => |lex| blk: {
-                var sym_data = self.ctx.symbol_table.get(lex).?;
+                var sym_data = self.ctx.symbol_table.get(lex).?.value;
                 break :blk switch (sym_data.*) {
                     .Struct => unreachable,
                     .Enum => llvm.LLVMInt32Type(),
@@ -64,8 +64,8 @@ pub const Codegen = struct {
         };
     }
 
-    fn emitForVariableType(self: *@This(), vari: anytype, get: anytype, kv: anytype) !llvm.LLVMValueRef {
-        var sym = kv;
+    fn emitForVariableType(self: *@This(), vari: var, get: var, kv: var) !llvm.LLVMValueRef {
+        var sym = kv.value;
 
         switch (sym.*) {
             .Enum => |map| {
@@ -76,7 +76,7 @@ pub const Codegen = struct {
                         get.name.lexeme,
                     });
                 }
-                return llvm.LLVMConstInt(llvm.LLVMInt32Type(), val.?, 1);
+                return llvm.LLVMConstInt(llvm.LLVMInt32Type(), val.?.value, 1);
             },
 
             .Struct => @panic("TODO handle struct"),
@@ -89,7 +89,7 @@ pub const Codegen = struct {
 
     fn emitExpr(
         self: *Codegen,
-        builder: anytype,
+        builder: var,
         expr: *const ast.Expr,
     ) anyerror!llvm.LLVMValueRef {
         return switch (expr.*) {
@@ -185,16 +185,16 @@ pub const Codegen = struct {
                 var args = LLVMValueList.init(self.allocator);
                 errdefer args.deinit();
 
-                for (call.arguments.items) |arg_expr| {
+                for (call.arguments.toSlice()) |arg_expr| {
                     var arg_val = try self.emitExpr(builder, &arg_expr);
                     try args.append(arg_val);
                 }
 
-                var args_slice = args.items;
+                var args_slice = args.toSlice();
 
                 return llvm.LLVMBuildCall(
                     builder,
-                    llvm_func.?,
+                    llvm_func.?.value,
                     args_slice.ptr,
                     @intCast(c_uint, args_slice.len),
                     "call",
@@ -203,10 +203,10 @@ pub const Codegen = struct {
 
             .Assign => |assign| {
                 const name = assign.name.lexeme;
-                var meta = self.ctx.current_scope.?.meta_map.get(name).?;
+                var meta = self.ctx.current_scope.?.meta_map.get(name).?.value;
                 var assign_expr = try self.emitExpr(builder, assign.value);
                 var llvm_alloca: llvm.LLVMValueRef = switch (meta.using) {
-                    .Function => meta.from_function.?.parameters.get(name).?.llvm_alloca.?,
+                    .Function => meta.from_function.?.parameters.get(name).?.value.llvm_alloca.?,
                     .Scope => meta.llvm_alloca.?,
                 };
 
@@ -224,7 +224,7 @@ pub const Codegen = struct {
                 // we have metadata, which means we can check if the variable
                 // is coming from the scope or from the function
 
-                var metadata = kv_opt.?;
+                var metadata = kv_opt.?.value;
                 std.debug.warn("!! LOAD FROM VAR META {}\n", .{@ptrToInt(metadata)});
 
                 var buf = try self.allocator.alloc(u8, 512);
@@ -237,13 +237,13 @@ pub const Codegen = struct {
 
                 return switch (metadata.using) {
                     .Function => blk: {
-                        var param = metadata.from_function.?.parameters.get(vari.lexeme).?;
+                        var param = metadata.from_function.?.parameters.get(vari.lexeme).?.value;
                         break :blk llvm.LLVMBuildLoad(builder, param.llvm_alloca.?, load_cstr.ptr);
                     },
 
                     .Scope => blk: {
                         var llvm_alloca = metadata.llvm_alloca.?;
-                        //var var_typ = metadata.from_scope.?.env.get(vari.lexeme).?;
+                        //var var_typ = metadata.from_scope.?.env.get(vari.lexeme).?.value;
                         break :blk llvm.LLVMBuildLoad(builder, llvm_alloca, load_cstr.ptr);
                     },
                 };
@@ -260,7 +260,7 @@ pub const Codegen = struct {
         };
     }
 
-    fn emitStmt(self: *Codegen, builder: anytype, stmt: *ast.Stmt) anyerror!void {
+    fn emitStmt(self: *Codegen, builder: var, stmt: *ast.Stmt) anyerror!void {
         std.debug.warn("cgen: emitting stmt {}\n", .{@as(ast.StmtType, stmt.*)});
 
         switch (stmt.*) {
@@ -294,7 +294,7 @@ pub const Codegen = struct {
 
                 self.ctx.setScope(self.ctx.current_scope.?.nextChild());
 
-                var then_branch = ifstmt.then_branch.items;
+                var then_branch = ifstmt.then_branch.toSlice();
                 for (then_branch) |_, idx| {
                     // keep emitting until branch has ret
                     var then_stmt = &then_branch[idx];
@@ -326,7 +326,7 @@ pub const Codegen = struct {
                 if (ifstmt.else_branch) |else_block| {
                     self.ctx.setScope(self.ctx.current_scope.?.nextChild());
 
-                    var else_slice = else_block.items;
+                    var else_slice = else_block.toSlice();
                     for (else_slice) |_, idx| {
                         // keep emitting until branch has ret
                         var else_stmt = &else_slice[idx];
@@ -361,7 +361,7 @@ pub const Codegen = struct {
                 // analyze pass and the current scope contains the variable's
                 // type(hopefully), so we resolve it
                 const name = vardecl.name.lexeme;
-                var var_metadata = self.ctx.current_scope.?.meta_map.get(name).?;
+                var var_metadata = self.ctx.current_scope.?.meta_map.get(name).?.value;
 
                 var name_cstr = try std.cstr.addNullByte(self.allocator, name);
                 errdefer self.allocator.free(name_cstr);
@@ -392,7 +392,7 @@ pub const Codegen = struct {
     }
 
     fn getFnSymbol(self: *@This(), name: []const u8) *comp.FunctionSymbol {
-        var fn_sym_search = self.ctx.symbol_table.get(name).?;
+        var fn_sym_search = self.ctx.symbol_table.get(name).?.value;
         std.debug.assert(@as(comp.SymbolType, fn_sym_search.*) == .Function);
         return &fn_sym_search.Function;
     }
@@ -418,16 +418,16 @@ pub const Codegen = struct {
                 var param_types = llvm.LLVMTypeList.init(self.allocator);
                 errdefer param_types.deinit();
 
-                for (decl.params.items) |param| {
+                for (decl.params.toSlice()) |param| {
                     try param_types.append(try self.typeToLLVM(fn_sym.parameters.get(
                         param.name.lexeme,
-                    ).?.typ));
+                    ).?.value.typ));
                 }
 
                 var llvm_ret_type = llvm.LLVMFunctionType(
                     try self.typeToLLVM(fn_sym.return_type),
-                    param_types.items.ptr,
-                    @intCast(c_uint, param_types.items.len),
+                    param_types.toSlice().ptr,
+                    @intCast(c_uint, param_types.len),
                     0,
                 );
 
@@ -444,9 +444,9 @@ pub const Codegen = struct {
 
                 // to have the ability to mutate parameters, we must allocate them on
                 // the stack
-                var params_slice = decl.params.items;
+                var params_slice = decl.params.toSlice();
                 for (params_slice) |param_node, idx| {
-                    var param = fn_sym.parameters.get(param_node.name.lexeme).?;
+                    var param = fn_sym.parameters.get(param_node.name.lexeme).?.value;
 
                     const param_name_cstr = try std.cstr.addNullByte(self.allocator, param_node.name.lexeme);
                     errdefer self.allocator.free(param_name_cstr);
@@ -467,7 +467,7 @@ pub const Codegen = struct {
 
                 // TODO check if stmt is return and if we already
                 // returned before
-                var body_slice = decl.body.items;
+                var body_slice = decl.body.toSlice();
                 for (body_slice) |_, idx| {
                     try self.emitStmt(builder, &body_slice[idx]);
                 }
@@ -480,10 +480,10 @@ pub const Codegen = struct {
             .Enum => {},
 
             .ConstDecl => |constdecls| {
-                for (constdecls.items) |constdecl| {
+                for (constdecls.toSlice()) |constdecl| {
                     const name = constdecl.name.lexeme;
 
-                    var const_type = self.ctx.symbol_table.get(name).?;
+                    var const_type = self.ctx.symbol_table.get(name).?.value;
                     var const_llvm_type = try self.typeToLLVM(const_type.Const);
 
                     const const_name = try std.cstr.addNullByte(self.allocator, name);
@@ -515,7 +515,7 @@ pub const Codegen = struct {
         var mod = llvm.LLVMModuleCreateWithName("awoo").?;
         defer llvm.LLVMDisposeModule(mod);
 
-        var root_slice = root.Root.items;
+        var root_slice = root.Root.toSlice();
         for (root_slice) |_, idx| {
             try self.genNode(mod, &root_slice[idx]);
         }
diff --git a/src/comp_ctx.zig b/src/comp_ctx.zig
index 54ac03f..44f377b 100644
--- a/src/comp_ctx.zig
+++ b/src/comp_ctx.zig
@@ -70,14 +70,13 @@ pub const Scope = struct {
     }
 
     pub fn nextChild(self: *@This()) *Scope {
-        var child = self.children.items[self.cur_child_idx];
+        var child = self.children.at(self.cur_child_idx);
         self.cur_child_idx += 1;
         return child;
     }
 
     pub fn deinit(self: *const @This()) void {
-        // XXX: fix this someday
-        // self.env.deinit();
+        self.env.deinit();
     }
 };
 
@@ -272,8 +271,8 @@ pub const CompilationContext = struct {
     pub fn insertStruct(self: *@This(), struc: ast.Struct, field_types: TypeList) !void {
         var type_map = UnderlyingTypeMap.init(self.allocator);
 
-        for (struc.fields.items) |field, idx| {
-            _ = try type_map.put(field.name.lexeme, field_types.items[idx]);
+        for (struc.fields.toSlice()) |field, idx| {
+            _ = try type_map.put(field.name.lexeme, field_types.at(idx));
         }
 
         var symbol = try self.allocator.create(SymbolData);
@@ -290,13 +289,13 @@ pub const CompilationContext = struct {
     ) !void {
         var param_map = ParameterMap.init(self.allocator);
 
-        for (decl.params.items) |param, idx| {
+        for (decl.params.toSlice()) |param, idx| {
             var param_sym = try self.allocator.create(Parameter);
 
             param_sym.* = Parameter{
                 .name = param.name.lexeme,
                 .idx = idx,
-                .typ = param_types.items[idx],
+                .typ = param_types.at(idx),
             };
             _ = try param_map.put(param.name.lexeme, param_sym);
         }
@@ -319,7 +318,7 @@ pub const CompilationContext = struct {
         _ = try self.symbol_table.put(lex, symbol);
 
         var kv = self.symbol_table.get(lex);
-        self.cur_function = &kv.?.Function;
+        self.cur_function = &kv.?.value.Function;
     }
 
     pub fn insertEnum(self: *@This(), enu: ast.Enum) !void {
@@ -327,7 +326,7 @@ pub const CompilationContext = struct {
         errdefer ident_map.deinit();
 
         // TODO change this when enums get support for custom values
-        for (enu.fields.items) |token, idx| {
+        for (enu.fields.toSlice()) |token, idx| {
             _ = try ident_map.put(token.lexeme, @intCast(u32, idx));
         }
 
@@ -353,7 +352,7 @@ pub const CompilationContext = struct {
             return CompilationError.TypeError;
         }
 
-        var value = sym_kv.?;
+        var value = sym_kv.?.value;
 
         var sym_typ = @as(SymbolType, value.*);
         if (sym_typ != typ) {
@@ -379,7 +378,7 @@ pub const CompilationContext = struct {
                 return try VariableMetadata.withScope(
                     self.allocator,
                     scope,
-                    kv,
+                    kv.value,
                 );
             } else {
                 return null;
@@ -409,7 +408,7 @@ pub const CompilationContext = struct {
                     return try VariableMetadata.withParam(
                         self.allocator,
                         cur_function,
-                        kv.typ,
+                        kv.value.typ,
                     );
                 } else {
                     return null;
diff --git a/src/errors.zig b/src/errors.zig
index 5eb089e..88c05f1 100644
--- a/src/errors.zig
+++ b/src/errors.zig
@@ -12,7 +12,7 @@ pub fn reportN(line: usize, message: []const u8) void {
     report(line, "", message);
 }
 
-pub fn reportFmt(line: usize, ctx_opt: ?[]const u8, comptime fmt: []const u8, args: anytype) void {
+pub fn reportFmt(line: usize, ctx_opt: ?[]const u8, comptime fmt: []const u8, args: var) void {
     if (ctx_opt) |ctx| {
         std.debug.warn("[line {}] Error on {}", .{ line, ctx });
     } else {
diff --git a/src/parsers.zig b/src/parsers.zig
index db41947..391b48e 100644
--- a/src/parsers.zig
+++ b/src/parsers.zig
@@ -94,7 +94,7 @@ pub const Parser = struct {
         self.tokens.deinit();
     }
 
-    fn setErrContext(self: *Parser, comptime fmt: ?[]const u8, args: anytype) void {
+    fn setErrContext(self: *Parser, comptime fmt: ?[]const u8, args: var) void {
         if (fmt == null) {
             self.err_ctx = null;
             return;
@@ -104,7 +104,7 @@ pub const Parser = struct {
         self.err_ctx = std.fmt.bufPrint(buf, fmt.?, args) catch unreachable;
     }
 
-    fn doError(self: *Parser, comptime fmt: []const u8, args: anytype) ParseError {
+    fn doError(self: *Parser, comptime fmt: []const u8, args: var) ParseError {
         self.hadError = true;
 
         std.debug.warn("parser error at line {}", .{self.scanner.line});
@@ -138,11 +138,11 @@ pub const Parser = struct {
     }
 
     fn peek(self: *Parser) Token {
-        return self.tokens.items[self.tokens.items.len - 1];
+        return self.tokens.at(self.tokens.len - 1);
     }
 
     fn previous(self: *Parser) Token {
-        return self.tokens.items[self.tokens.items.len - 2];
+        return self.tokens.at(self.tokens.len - 2);
     }
 
     fn tokenError(self: *Parser, token: Token, msg: []const u8) ParseError {
@@ -215,7 +215,7 @@ pub const Parser = struct {
     }
 
     /// check() against multiple tokens
-    fn compareAnyOf(self: *@This(), ttypes: []const TokenType) bool {
+    fn compareAnyOf(self: *@This(), ttypes: []TokenType) bool {
         for (ttypes) |typ| {
             if (self.check(typ)) return true;
         }