Add @Type builtin

test/compile_errors.zig

@@ -2,6 +2,58 @@ const tests = @import("tests.zig");
 const builtin = @import("builtin");
 
 pub fn addCases(cases: *tests.CompileErrorContext) void {
+
+    cases.add(
+        "wrong type for @Type",
+        \\export fn entry() void {
+        \\    _ = @Type(0);
+        \\}
+    ,
+        "tmp.zig:2:15: error: expected type 'builtin.TypeInfo', found 'comptime_int'",
+    );
+
+    cases.add(
+        "@Type with non-constant expression",
+        \\const builtin = @import("builtin");
+        \\var globalTypeInfo : builtin.TypeInfo = undefined;
+        \\export fn entry() void {
+        \\    _ = @Type(globalTypeInfo);
+        \\}
+    ,
+        "tmp.zig:4:15: error: unable to evaluate constant expression",
+    );
+
+    cases.add(
+        "@Type with TypeInfo.Int",
+        \\const builtin = @import("builtin");
+        \\export fn entry() void {
+        \\    _ = @Type(builtin.TypeInfo.Int {
+        \\        .is_signed = true,
+        \\        .bits = 8,
+        \\    });
+        \\}
+    ,
+        "tmp.zig:3:36: error: expected type 'builtin.TypeInfo', found 'builtin.Int'",
+    );
+
+    cases.add(
+        "Struct unavailable for @Type",
+        \\export fn entry() void {
+        \\    _ = @Type(@typeInfo(struct { }));
+        \\}
+    ,
+        "tmp.zig:2:15: error: @Type not availble for 'TypeInfo.Struct'",
+    );
+
+    cases.add(
+        "array not implemented for @Type",
+        \\export fn entry() void {
+        \\    _ = @Type(@typeInfo(enum{x}));
+        \\}
+    ,
+        "tmp.zig:2:15: error: TODO implement @Type forr 'TypeInfo.Enum': see https://github.com/ziglang/zig/issues/2907",
+    );
+
     cases.add(
         "wrong type for result ptr to @asyncCall",
         \\export fn entry() void {