Warning Numbers
You can configure which warnings the ReScript compiler generates
in the build configuration or
using the @warning()
or the @@warning()
decorator.
# | Description |
---|---|
a | All flags |
1 | Suspicious-looking start-of-comment mark. |
2 | Suspicious-looking end-of-comment mark. |
3 | Deprecated feature. |
4 | Fragile pattern matching: matching that will remain complete even if additional constructors are added to one of the variant types matched. |
5 | Partially applied function: expression whose result has function type and is ignored. |
6 | Label omitted in function application. |
8 | Partial match: missing cases in pattern-matching. |
9 | Missing fields in a record pattern. |
10 | Expression on the left-hand side of a sequence that doesn't have type "unit" (and that is not a function, see warning number 5). |
11 | Redundant case in a pattern matching (unused match case). |
12 | Redundant sub-pattern in a pattern-matching. |
14 | Illegal backslash escape in a string constant. |
16 | Unerasable optional argument. |
20 | Unused function argument. |
21 | Non-returning statement. |
23 | Useless record "with" clause. |
24 | Bad module name: the source file name is not a valid ReScript module name. |
26 | Suspicious unused variable: unused variable that is bound with "let" or "as", and doesn't start with an underscore ("_") character. |
27 | Innocuous unused variable: unused variable that is not bound with "let" nor "as", and doesn't start with an underscore ("_") character. |
28 | Wildcard pattern given as argument to a constant constructor. |
29 | Unescaped end-of-line in a string constant (non-portable code). |
30 | Two labels or constructors of the same name are defined in two mutually recursive types. |
32 | Unused value declaration. |
33 | Unused open statement. |
34 | Unused type declaration. |
35 | Unused for-loop index. |
36 | Unused ancestor variable. |
37 | Unused constructor. |
38 | Unused extension constructor. |
39 | Unused rec flag. |
43 | Nonoptional label applied as optional. |
44 | Open statement shadows an already defined identifier. |
45 | Open statement shadows an already defined label or constructor. |
46 | Error in environment variable. |
47 | Illegal attribute payload. |
48 | Implicit elimination of optional arguments. |
49 | Absent cmi file when looking up module alias. |
50 | Unexpected documentation comment. |
52 | Fragile constant pattern. |
53 | Attribute cannot appear in this context |
54 | Attribute used more than once on an expression |
56 | Unreachable case in a pattern-matching (based on type information). |
57 | Ambiguous or-pattern variables under guard |
59 | Assignment to non-mutable value |
60 | Unused module declaration |
61 | Unboxable type in primitive declaration |
62 | Type constraint on GADT type declaration |
101 | Unused bs attributes |
102 | Polymorphic comparison introduced (maybe unsafe) |
103 | Fragile FFI definitions |
104 | bs.deriving warning with customized message |
105 | External name is inferred from val name is unsafe from refactoring when changing value name |
106 | Unimplemented primitive used: |
107 | Integer literal exceeds the range of representable integers of type int |
108 | Uninterpreted delimiters (for unicode) |
109 | Toplevel expression has unit type |
110 | Todo found |