vlib/v/checker/tests/infix_err.vv:13:5: error: mismatched types `string` and `?string`
   11 | }
   12 | 
   13 | _ = '' + f()
      |     ~~~~~~~~
   14 | _ = f() + ''
   15 | _ = f() + f()
vlib/v/checker/tests/infix_err.vv:13:10: error: `?string` cannot be used as `string`, unwrap the option first
   11 | }
   12 | 
   13 | _ = '' + f()
      |          ~~~
   14 | _ = f() + ''
   15 | _ = f() + f()
vlib/v/checker/tests/infix_err.vv:14:5: error: mismatched types `?string` and `string`
   12 | 
   13 | _ = '' + f()
   14 | _ = f() + ''
      |     ~~~~~~~~
   15 | _ = f() + f()
   16 |
vlib/v/checker/tests/infix_err.vv:14:5: error: `?string` cannot be used as `string`, unwrap the option first
   12 | 
   13 | _ = '' + f()
   14 | _ = f() + ''
      |     ~~~
   15 | _ = f() + f()
   16 |
vlib/v/checker/tests/infix_err.vv:15:5: error: `?string` cannot be used as `string`, unwrap the option first
   13 | _ = '' + f()
   14 | _ = f() + ''
   15 | _ = f() + f()
      |     ~~~
   16 | 
   17 | _ = 4 + g()
vlib/v/checker/tests/infix_err.vv:17:9: error: `?int` cannot be used as `int literal`, unwrap the option first
   15 | _ = f() + f()
   16 | 
   17 | _ = 4 + g()
      |         ~~~
   18 | _ = int(0) + g()
   19 | _ = g() + int(3)
vlib/v/checker/tests/infix_err.vv:18:14: error: `?int` cannot be used as `int`, unwrap the option first
   16 | 
   17 | _ = 4 + g()
   18 | _ = int(0) + g()
      |              ~~~
   19 | _ = g() + int(3)
   20 | _ = g() + 3
vlib/v/checker/tests/infix_err.vv:19:5: error: `?int` cannot be used as `int`, unwrap the option first
   17 | _ = 4 + g()
   18 | _ = int(0) + g()
   19 | _ = g() + int(3)
      |     ~~~
   20 | _ = g() + 3
   21 |
vlib/v/checker/tests/infix_err.vv:20:5: error: `?int` cannot be used as `int literal`, unwrap the option first
   18 | _ = int(0) + g()
   19 | _ = g() + int(3)
   20 | _ = g() + 3
      |     ~~~
   21 | 
   22 | // binary operands
vlib/v/checker/tests/infix_err.vv:23:5: error: left operand for `&&` is not a boolean
   21 | 
   22 | // binary operands
   23 | _ = 1 && 2
      |     ^
   24 | _ = true || 2
   25 |
vlib/v/checker/tests/infix_err.vv:23:10: error: right operand for `&&` is not a boolean
   21 | 
   22 | // binary operands
   23 | _ = 1 && 2
      |          ^
   24 | _ = true || 2
   25 |
vlib/v/checker/tests/infix_err.vv:24:13: error: right operand for `||` is not a boolean
   22 | // binary operands
   23 | _ = 1 && 2
   24 | _ = true || 2
      |             ^
   25 | 
   26 | // boolean expressions
vlib/v/checker/tests/infix_err.vv:24:5: error: infix expr: cannot use `int literal` (right expression) as `bool`
   22 | // binary operands
   23 | _ = 1 && 2
   24 | _ = true || 2
      |     ~~~~~~~~~
   25 | 
   26 | // boolean expressions
vlib/v/checker/tests/infix_err.vv:27:22: error: ambiguous boolean expression. use `()` to ensure correct order of operations
   25 | 
   26 | // boolean expressions
   27 | _ = 1 == 1 && 2 == 2 || 3 == 3
      |                      ~~
   28 | _ = 1 == 1 && 2 == 2 || 3 == 3 && 4 == 4
   29 | _ = 1 + println('')
vlib/v/checker/tests/infix_err.vv:28:22: error: ambiguous boolean expression. use `()` to ensure correct order of operations
   26 | // boolean expressions
   27 | _ = 1 == 1 && 2 == 2 || 3 == 3
   28 | _ = 1 == 1 && 2 == 2 || 3 == 3 && 4 == 4
      |                      ~~
   29 | _ = 1 + println('')
   30 |
vlib/v/checker/tests/infix_err.vv:29:5: error: mismatched types `int literal` and `void`
   27 | _ = 1 == 1 && 2 == 2 || 3 == 3
   28 | _ = 1 == 1 && 2 == 2 || 3 == 3 && 4 == 4
   29 | _ = 1 + println('')
      |     ~~~~~~~~~~~~~~~
   30 | 
   31 | // struct members
vlib/v/checker/tests/infix_err.vv:36:11: error: `?string` cannot be used as `string`, unwrap the option first
   34 | }
   35 | name := 'a name'
   36 | _ := data.name == 'a name'
      |           ~~~~
   37 | _ := 'a name' == data.name
   38 | _ := data.name == name
vlib/v/checker/tests/infix_err.vv:37:23: error: `?string` cannot be used as `string`, unwrap the option first
   35 | name := 'a name'
   36 | _ := data.name == 'a name'
   37 | _ := 'a name' == data.name
      |                       ~~~~
   38 | _ := data.name == name
   39 | _ := name == data.name
vlib/v/checker/tests/infix_err.vv:38:11: error: `?string` cannot be used as `string`, unwrap the option first
   36 | _ := data.name == 'a name'
   37 | _ := 'a name' == data.name
   38 | _ := data.name == name
      |           ~~~~
   39 | _ := name == data.name
   40 |
vlib/v/checker/tests/infix_err.vv:39:19: error: `?string` cannot be used as `string`, unwrap the option first
   37 | _ := 'a name' == data.name
   38 | _ := data.name == name
   39 | _ := name == data.name
      |                   ~~~~
   40 | 
   41 | // these should not error