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test_error_union.zig (572B) - Raw

      1 const expect = @import("std").testing.expect;
      2 
      3 test "error union" {
      4     var foo: anyerror!i32 = undefined;
      5 
      6     // Coerce from child type of an error union:
      7     foo = 1234;
      8 
      9     // Coerce from an error set:
     10     foo = error.SomeError;
     11 
     12     // Use compile-time reflection to access the payload type of an error union:
     13     try comptime expect(@typeInfo(@TypeOf(foo)).error_union.payload == i32);
     14 
     15     // Use compile-time reflection to access the error set type of an error union:
     16     try comptime expect(@typeInfo(@TypeOf(foo)).error_union.error_set == anyerror);
     17 }
     18 
     19 // test