Comments (8)
function length() { ... }
length("Hello")
Flow should warn that you're calling a function that takes 0 arguments with 1 argument no?
from flow.
It is a valid point, but issue still exist with updated example:
/* @flow */
var x = null;
function length() {
if (x === null || x === undefined) {
return 0;
}
return x.length;
}
var total = length();
from flow.
Please use x == null as a workaround. (Known issue about Flow not understanding === undefined.)
from flow.
Merging with #21
from flow.
It looks like this is something else, since this doesn't work even with with x == null
/* @flow */
var x = null;
function length() {
if (x == null) {
return 0;
}
return x.length;
}
var total = length();
I still get
nulls.js:7:16,23: property length
Property cannot be accessed on possibly null value
nulls.js:2:13,16: null
As I said before, I don't get this error when var x = null;
is inside function length
from flow.
@dugokontov did you ever find a solution to this? I'm noticing this issue now with early returns and null
able input arguments.
from flow.
@arb no ):
For some reason @avikchaudhuri closed this issue a long time ago...
from flow.
I have the same problem :-(
from flow.
Related Issues (20)
- flow_parser.js file increased from 0.7M to 2.7M in v0.210 HOT 4
- `Omit` does not work well with unions HOT 3
- ☂️ Known unsoundness issues
- Partial type does not accept plain empty object literal as a default HOT 5
- Cannot return class type as T: Cannot return `root(...)` because a call signature declaring the expected parameter / return type is missing in `SomeModel` [1] but exists in function type [2].Flow(prop-missing) HOT 2
- Does not narrow down type after undefined/falsy check HOT 1
- Recursive/deep Partial HOT 2
- Bugs in negated `instanceof` expressions HOT 1
- [Question]: How to fix flowgen test after flow update HOT 3
- [Discussion]: Any plans to make Flow more interpopble with TS ecosystem? HOT 5
- Higher order type parameter support HOT 1
- Readme links to 404
- Strange index signature error if you use $Keys<O> instead of the equivalent literal union inside $ReadOnlyArray HOT 1
- [homebrew] automation script needs update HOT 2
- "Unxepcted identifier, expected the token ;" when using await inside of ES module HOT 3
- Can't iterate through chars in a string HOT 4
- Flow does not catch invalid switch statements HOT 1
- Conditional type only works if I inline it HOT 5
- Object with null prototype does not extend interface {} HOT 3
- Missing documentation for "render-types"? HOT 2
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