diff --git a/src/lib.zig b/src/lib.zig
index c56b5854d84dbeeb027cd9db1f6c1dc1400a9e4d..c9ca2edcda5de532d56ac2986f63e77cf67828d4 100644
--- a/src/lib.zig
+++ b/src/lib.zig
@@ -84,16 +84,17 @@ fn do(writer: anytype, comptime value: astgen.Value, data: anytype, ctx: anytype
         .block => |v| {
             const body = astgen.Value{ .body = v.body };
             const bottom = astgen.Value{ .body = v.bttm };
+            const x = if (comptime std.mem.eql(u8, v.args[0][0], "this")) search(v.args[0][1..], data) else search(v.args[0], ctx);
+            const T = @TypeOf(x);
+            const TI = @typeInfo(T);
             switch (v.name) {
                 .each => {
                     comptime assertEqual(v.args.len, 1);
-                    const x = if (comptime std.mem.eql(u8, v.args[0][0], "this")) search(v.args[0][1..], data) else search(v.args[0], ctx);
                     for (x) |item| try do(writer, body, item, ctx, indent, flag1);
                 },
                 .@"if" => {
                     comptime assertEqual(v.args.len, 1);
-                    const x = if (comptime std.mem.eql(u8, v.args[0][0], "this")) search(v.args[0][1..], data) else search(v.args[0], ctx);
-                    switch (@typeInfo(@TypeOf(x))) {
+                    switch (TI) {
                         .Bool => try doif(writer, body, bottom, data, ctx, indent, flag1, x, true),
                         .Optional => try docap(writer, body, bottom, data, ctx, indent, flag1, x, true),
                         else => unreachable,
@@ -101,8 +102,7 @@ fn do(writer: anytype, comptime value: astgen.Value, data: anytype, ctx: anytype
                 },
                 .ifnot => {
                     comptime assertEqual(v.args.len, 1);
-                    const x = if (comptime std.mem.eql(u8, v.args[0][0], "this")) search(v.args[0][1..], data) else search(v.args[0], ctx);
-                    switch (@typeInfo(@TypeOf(x))) {
+                    switch (TI) {
                         .Bool => try doif(writer, body, bottom, data, ctx, indent, flag1, x, false),
                         .Optional => try docap(writer, body, bottom, data, ctx, indent, flag1, x, false),
                         else => unreachable,
@@ -110,13 +110,11 @@ fn do(writer: anytype, comptime value: astgen.Value, data: anytype, ctx: anytype
                 },
                 .ifequal => {
                     comptime assertEqual(v.args.len, 2);
-                    const x = if (comptime std.mem.eql(u8, v.args[0][0], "this")) search(v.args[0][1..], data) else search(v.args[0], ctx);
                     const y = search(v.args[1], data);
                     if (x == y) try do(writer, body, data, ctx, indent, flag1);
                 },
                 .ifnotequal => {
                     comptime assertEqual(v.args.len, 2);
-                    const x = if (comptime std.mem.eql(u8, v.args[0][0], "this")) search(v.args[0][1..], data) else search(v.args[0], ctx);
                     const y = if (comptime std.mem.eql(u8, v.args[1][0], "this")) search(v.args[1][1..], data) else search(v.args[1], ctx);
                     if (x != y) try do(writer, body, data, ctx, indent, flag1);
                 },