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|
(* TEST
flags = "-strict-sequence";
expect;
*)
if 3 then ();;
[%%expect{|
Line 1, characters 3-4:
1 | if 3 then ();;
^
Error: This expression has type int but an expression was expected of type
bool
because it is in the condition of an if-statement
|}];;
fun b -> if true then (print_int b) else (if b then ());;
[%%expect{|
Line 1, characters 45-46:
1 | fun b -> if true then (print_int b) else (if b then ());;
^
Error: This expression has type int but an expression was expected of type
bool
because it is in the condition of an if-statement
|}];;
(* Left-to-right bias is still there: if we swap the branches, the new error
message does not show up because of propagation order. *)
fun b -> if true then (if b then ()) else (print_int b);;
[%%expect{|
Line 1, characters 53-54:
1 | fun b -> if true then (if b then ()) else (print_int b);;
^
Error: This expression has type bool but an expression was expected of type
int
|}];;
if (let x = 3 in x) then ();;
[%%expect{|
Line 1, characters 17-18:
1 | if (let x = 3 in x) then ();;
^
Error: This expression has type int but an expression was expected of type
bool
because it is in the condition of an if-statement
|}];;
if (if true then 3 else 4) then ();;
[%%expect{|
Line 1, characters 17-18:
1 | if (if true then 3 else 4) then ();;
^
Error: This expression has type int but an expression was expected of type
bool
because it is in the condition of an if-statement
|}];;
if true then 3;;
[%%expect{|
Line 1, characters 13-14:
1 | if true then 3;;
^
Error: This expression has type int but an expression was expected of type
unit
because it is in the result of a conditional with no else branch
|}];;
if (fun x -> x) then ();;
[%%expect{|
Line 1, characters 3-15:
1 | if (fun x -> x) then ();;
^^^^^^^^^^^^
Error: This expression should not be a function, the expected type is
bool because it is in the condition of an if-statement
|}];;
while 42 do () done;;
[%%expect{|
Line 1, characters 6-8:
1 | while 42 do () done;;
^^
Error: This expression has type int but an expression was expected of type
bool
because it is in the condition of a while-loop
|}];;
(* -strict-sequence is required for this test to fail, otherwise only a warning
is produced *)
while true do (if true then 3 else 4) done;;
[%%expect{|
Line 1, characters 14-37:
1 | while true do (if true then 3 else 4) done;;
^^^^^^^^^^^^^^^^^^^^^^^
Error: This expression has type int but an expression was expected of type
unit
because it is in the body of a while-loop
|}];;
for i = 3. to 4 do () done;;
[%%expect{|
Line 1, characters 8-10:
1 | for i = 3. to 4 do () done;;
^^
Error: This expression has type float but an expression was expected of type
int
because it is in a for-loop start index
|}];;
for i = 3 to 4. do () done;;
[%%expect{|
Line 1, characters 13-15:
1 | for i = 3 to 4. do () done;;
^^
Error: This expression has type float but an expression was expected of type
int
because it is in a for-loop stop index
|}];;
(* -strict-sequence is required for this test to fail, otherwise only a warning
is produced *)
for i = 0 to 0 do (if true then 3 else 4) done;;
[%%expect{|
Line 1, characters 18-41:
1 | for i = 0 to 0 do (if true then 3 else 4) done;;
^^^^^^^^^^^^^^^^^^^^^^^
Error: This expression has type int but an expression was expected of type
unit
because it is in the body of a for-loop
|}];;
assert 12;;
[%%expect{|
Line 1, characters 7-9:
1 | assert 12;;
^^
Error: This expression has type int but an expression was expected of type
bool
because it is in the condition of an assertion
|}];;
(* -strict-sequence is also required for this test to fail *)
(let x = 3 in x+1); ();;
[%%expect{|
Line 1, characters 0-18:
1 | (let x = 3 in x+1); ();;
^^^^^^^^^^^^^^^^^^
Error: This expression has type int but an expression was expected of type
unit
because it is in the left-hand side of a sequence
|}];;
let ordered_list_with x y =
if x <= y then [x;y]
else if x > y then [y;x]
[%%expect{|
Line 3, characters 22-26:
3 | else if x > y then [y;x]
^^^^
Error: This variant expression is expected to have type unit
because it is in the result of a conditional with no else branch
There is no constructor :: within type unit
|}];;
(function
| y when y + 1 -> ()
| _ -> ());;
[%%expect{|
Line 2, characters 11-16:
2 | | y when y + 1 -> ()
^^^^^
Error: This expression has type int but an expression was expected of type
bool
because it is in a when-guard
|}];;
(* #10106 *)
if false then (match () with () -> true);;
[%%expect{|
Line 1, characters 35-39:
1 | if false then (match () with () -> true);;
^^^^
Error: This variant expression is expected to have type unit
because it is in the result of a conditional with no else branch
There is no constructor true within type unit
|}]
|
