An undelimited sequence of digits and letters is treated as a list instead of a single number

[andrew-skybound]

A number with a unit identifier that contains number itself should be parsed as a single number. For example, the number 100top1 should have the value 100 and unit top1. Even though there are currently no CSS units which have numbers in them, the CSS grammar defines a unit identifier as an {ident}. In general, it seems that SASS is not strict about this since sequences like 1-2 parse as an arithmetic expression and not the value 1 having the unit -1.

Nevertheless, Ruby SASS treats undelimited digit-letter sequences as a single number. Libsass treats them as lists of separate numbers.

Input:

div {
  foo: length(1a2b3c);
  foo: type-of(1a2b3c);
  foo: unit(1a2b3c);
  foo: (1a2b3c);
}

Ruby SASS:

div {
  foo: 1;
  foo: number;
  foo: "a2b3c";
  foo: 1a2b3c;
}

Libsass:

div {
  foo: 3;
  foo: list;
  /* foo: unit(1a2b3c); causes an error */
  foo: 1a 2b 3c;
}

[xzyfer]

@andrew-skybound thanks for the report. I can confirm this issue exists on the latest master.

[mgreter]

Main use cases are passing now and will be in 3.3!
Last minor issue is tracked in #1526