Issues parsing negative numbers when passed without `=`

in node shell:

> const arg = require('arg')
undefined
> arg({"--int": parseInt}, {argv:["--int=-100"]})
{ _: [], '--int': -100 }
> arg({"--int": parseInt}, {argv:["--int -100"]})
Thrown:
{ Error: Unknown or unexpected option: --int -100
    at arg (/run/media/karfau/hdd-data/dev/node-cli-arguments-options/arg/node_modules/arg/index.js:88:19) code: 'ARG_UNKNOWN_OPTION' }
> arg({"--num": parseFloat}, {argv:["--num=-1.0"]})
{ _: [], '--num': -1 }
> arg({"--num": parseFloat}, {argv:["--num -1.0"]})
Thrown:
{ Error: Unknown or unexpected option: --num -1.0
    at arg (node-cli-arguments-options/arg/node_modules/arg/index.js:88:19) code: 'ARG_UNKNOWN_OPTION' }

I also tried to wrap the numbers with different kinds of quotes, but it didn’t have any effect. I don’t know if this is a “feature” or a “bug”.

Update: The example above is bad in the sense that argv is different from what it would look like when using from the shell, which influences the error messages. A better example is:

> const arg = require('arg')
undefined
> arg({"--int": parseInt}, {argv:["--int", "-100"]})
Thrown:
Error: Option requires argument: --int
    at arg (node-cli-arguments-options/arg/node_modules/arg/index.js:105:13)
>  arg({"--float": parseFloat}, {argv:["--float", "-0.1"]})
Thrown:
Error: Option requires argument: --float
    at arg (node-cli-arguments-options/arg/node_modules/arg/index.js:105:13)

Since the repo doesn’t seem to be maintained (sorry for that, it’s not true, must have switched the name with one of the other repos), just filing this to make people aware since I discovered it while comparing features of different argument parsers (WIP)

[Qix-]

--int=-5 works. We don’t have special handling for numbers. That is indeed a bug.

However, the confusion comes from your usage. In the OP, you CANNOT pass a single string ("--int -5") to the argv option property. That will never work, even with a bugfix.

I’ll push a patch shortly. Thank you for bringing it up.

[Qix-]

Got distracted yesterday, apologies. Released as 4.1.3.