github.com/joomcode/cue@v0.4.4-0.20221111115225-539fe3512047/cue/testdata/eval/disjunctions.txtar

-- in.cue --
a:  *1 | int
aa: *1 | *2 | int

b: {
	name: "int"
	val:  int
} | {
	name: "str"
	val:  string
}

d: b & {val:  3}
c: b & {name: "int", val: 3}
e: b & {val:  "foo"}
f: b & {name: "str", val: 3}

// Disjunct elimination based on type.
e1: {
	a: null | {bar: 2}
	b: (a & {}).bar
}

d1: {
	a: (null | {c:      1}) & {}
	b: {} & (null | {c: 1})
}

d2: {
	a: ([...] | {c:      1}) & {}
	b: {} & ([...] | {c: 1})
}

d3: {
	a: (string | {c:      1}) & {}
	b: {} & (string | {c: 1})
}

d4: {
	a: (string | {c:      1}) & {}
	b: {} & (string | {c: 1})
}

d5: {
	a: (number | {c:      1}) & {}
	b: {} & (number | {c: 1})
}

d6: {
	a: (int | {c:      1}) & {}
	b: {} & (int | {c: 1})
}

t10: {
	schema: test
	schema: string | {name: string}
	#A: {string | {name: string}}

	test: name: "Test"
	test: #A
}

t10: {
	schema: string | {name: string}
	schema: test
	#A: {string | {name: string}}

	test: name: "Test"
	test: #A
}

t10: {
	#A: {string | {name: string}}

	test: name: "Test"
	test: #A

	schema: string | {name: string}
	schema: test
}

t11: {
	a: #A
	a: b

	b:  #A & ["b"]
	#A: ["a" | "b"] | {}
}

t11: {
	b:  #A & ["b"]
	#A: ["a" | "b"] | {}

	a: b
	a: #A
}

cross: {
	a: *"word" | string
	a: string | *"word"
}

d100: {
	// Should we allow a selector to imply a struct or list? Would be convenient.
	// This would be a spec change. Disallow for now.
	i: null | {bar: 2}
	j: i.bar
}

issue641: {
	#A: {
		type: "a"
		x:    ""
	}

	#B: {
		type: "b"
		x:    string
	}

	#C: {
		b: #A | #B
	}

	e: [string]: #C & {
		b: #A | #B
	}

	e: foobar: #C & {
		b: #B & {
			x: "foobar"
		}
	}
}
-- out/eval --
Errors:
f: 2 errors in empty disjunction:
f.name: conflicting values "int" and "str":
    ./in.cue:5:8
    ./in.cue:15:4
    ./in.cue:15:15
f.val: conflicting values 3 and string (mismatched types int and string):
    ./in.cue:9:8
    ./in.cue:15:4
    ./in.cue:15:27

Result:
(_|_){
  // [eval]
  a: (int){ |(*(int){ 1 }, (int){ int }) }
  aa: (int){ |(*(int){ 1 }, *(int){ 2 }, (int){ int }) }
  b: (struct){ |((struct){
      name: (string){ "int" }
      val: (int){ int }
    }, (struct){
      name: (string){ "str" }
      val: (string){ string }
    }) }
  d: (struct){
    val: (int){ 3 }
    name: (string){ "int" }
  }
  c: (struct){
    name: (string){ "int" }
    val: (int){ 3 }
  }
  e: (struct){
    val: (string){ "foo" }
    name: (string){ "str" }
  }
  f: (_|_){
    // [eval] f: 2 errors in empty disjunction:
    // f.name: conflicting values "int" and "str":
    //     ./in.cue:5:8
    //     ./in.cue:15:4
    //     ./in.cue:15:15
    // f.val: conflicting values 3 and string (mismatched types int and string):
    //     ./in.cue:9:8
    //     ./in.cue:15:4
    //     ./in.cue:15:27
    name: (string){ "str" }
    val: (_|_){
      // [eval] f.val: conflicting values 3 and string (mismatched types int and string):
      //     ./in.cue:9:8
      //     ./in.cue:15:4
      //     ./in.cue:15:27
    }
  }
  e1: (struct){
    a: ((null|struct)){ |((null){ null }, (struct){
        bar: (int){ 2 }
      }) }
    b: (int){ 2 }
  }
  d1: (struct){
    a: (struct){
      c: (int){ 1 }
    }
    b: (struct){
      c: (int){ 1 }
    }
  }
  d2: (struct){
    a: (struct){
      c: (int){ 1 }
    }
    b: (struct){
      c: (int){ 1 }
    }
  }
  d3: (struct){
    a: (struct){
      c: (int){ 1 }
    }
    b: (struct){
      c: (int){ 1 }
    }
  }
  d4: (struct){
    a: (struct){
      c: (int){ 1 }
    }
    b: (struct){
      c: (int){ 1 }
    }
  }
  d5: (struct){
    a: (struct){
      c: (int){ 1 }
    }
    b: (struct){
      c: (int){ 1 }
    }
  }
  d6: (struct){
    a: (struct){
      c: (int){ 1 }
    }
    b: (struct){
      c: (int){ 1 }
    }
  }
  t10: (struct){
    schema: (#struct){
      name: (string){ "Test" }
    }
    #A: ((string|struct)){ |((string){ string }, (#struct){
        name: (string){ string }
      }) }
    test: (#struct){
      name: (string){ "Test" }
    }
  }
  t11: (struct){
    a: (#list){
      0: (string){ "b" }
    }
    b: (#list){
      0: (string){ "b" }
    }
    #A: ((list|struct)){ |((#list){
        0: (string){ |((string){ "a" }, (string){ "b" }) }
      }, (#struct){
      }) }
  }
  cross: (struct){
    a: (string){ |(*(string){ "word" }, (string){ string }) }
  }
  d100: (struct){
    i: ((null|struct)){ |((null){ null }, (struct){
        bar: (int){ 2 }
      }) }
    j: (_|_){
      // [incomplete] d100.j: unresolved disjunction null | {bar:2} (type (null|struct)):
      //     ./in.cue:106:5
    }
  }
  issue641: (struct){
    #A: (#struct){
      type: (string){ "a" }
      x: (string){ "" }
    }
    #B: (#struct){
      type: (string){ "b" }
      x: (string){ string }
    }
    #C: (#struct){
      b: (#struct){ |((#struct){
          type: (string){ "a" }
          x: (string){ "" }
        }, (#struct){
          type: (string){ "b" }
          x: (string){ string }
        }) }
    }
    e: (struct){
      foobar: (#struct){
        b: (#struct){
          type: (string){ "b" }
          x: (string){ "foobar" }
        }
      }
    }
  }
}
-- out/compile --
--- in.cue
{
  a: (*1|int)
  aa: (*1|*2|int)
  b: ({
    name: "int"
    val: int
  }|{
    name: "str"
    val: string
  })
  d: (〈0;b〉 & {
    val: 3
  })
  c: (〈0;b〉 & {
    name: "int"
    val: 3
  })
  e: (〈0;b〉 & {
    val: "foo"
  })
  f: (〈0;b〉 & {
    name: "str"
    val: 3
  })
  e1: {
    a: (null|{
      bar: 2
    })
    b: (〈0;a〉 & {}).bar
  }
  d1: {
    a: ((null|{
      c: 1
    }) & {})
    b: ({} & (null|{
      c: 1
    }))
  }
  d2: {
    a: (([
      ...,
    ]|{
      c: 1
    }) & {})
    b: ({} & ([
      ...,
    ]|{
      c: 1
    }))
  }
  d3: {
    a: ((string|{
      c: 1
    }) & {})
    b: ({} & (string|{
      c: 1
    }))
  }
  d4: {
    a: ((string|{
      c: 1
    }) & {})
    b: ({} & (string|{
      c: 1
    }))
  }
  d5: {
    a: ((number|{
      c: 1
    }) & {})
    b: ({} & (number|{
      c: 1
    }))
  }
  d6: {
    a: ((int|{
      c: 1
    }) & {})
    b: ({} & (int|{
      c: 1
    }))
  }
  t10: {
    schema: 〈0;test〉
    schema: (string|{
      name: string
    })
    #A: {
      (string|{
        name: string
      })
    }
    test: {
      name: "Test"
    }
    test: 〈0;#A〉
  }
  t10: {
    schema: (string|{
      name: string
    })
    schema: 〈0;test〉
    #A: {
      (string|{
        name: string
      })
    }
    test: {
      name: "Test"
    }
    test: 〈0;#A〉
  }
  t10: {
    #A: {
      (string|{
        name: string
      })
    }
    test: {
      name: "Test"
    }
    test: 〈0;#A〉
    schema: (string|{
      name: string
    })
    schema: 〈0;test〉
  }
  t11: {
    a: 〈0;#A〉
    a: 〈0;b〉
    b: (〈0;#A〉 & [
      "b",
    ])
    #A: ([
      ("a"|"b"),
    ]|{})
  }
  t11: {
    b: (〈0;#A〉 & [
      "b",
    ])
    #A: ([
      ("a"|"b"),
    ]|{})
    a: 〈0;b〉
    a: 〈0;#A〉
  }
  cross: {
    a: (*"word"|string)
    a: (string|*"word")
  }
  d100: {
    i: (null|{
      bar: 2
    })
    j: 〈0;i〉.bar
  }
  issue641: {
    #A: {
      type: "a"
      x: ""
    }
    #B: {
      type: "b"
      x: string
    }
    #C: {
      b: (〈1;#A〉|〈1;#B〉)
    }
    e: {
      [string]: (〈1;#C〉 & {
        b: (〈2;#A〉|〈2;#B〉)
      })
    }
    e: {
      foobar: (〈1;#C〉 & {
        b: (〈2;#B〉 & {
          x: "foobar"
        })
      })
    }
  }
}