[feat] Hope to support new units 'rpx'

[bigmeow]

In China, the Wechat applet is very popular. It defines a responsive unit,'rpx'

code:

width: calc(100% - 10rpx);

I hope the above code will work properly.

Try to modify the following code to make it work

postcss-calc/src/parser.jison

Line 17 in 185f0fb

([0-9]+("."[0-9]+)?|"."[0-9]+)px\b return 'LENGTH';

//update after
([0-9]+("."[0-9]+)?|"."[0-9]+)r?px\b              return 'LENGTH';

Is this proposal acceptable to you?

[bigmeow]

Or users can customize unit validation

[alexander-akait]

Can you provide link on spec or docs

[alexander-akait]

And what is unit means

[alexander-akait]

rpx !== px and it is non standard, so we just relax parser to avoid throw error on unknown unit