parse string with regex

[clavrg]

--- 1 ---
I need to execute a regex against a string, and retrieve values of the groups.
E.g.:
regex: ^(?[0-9]+)Z(?[A-Z\.])$
string: 003ZAS.S
expected result:
group 1: 003
group 2: AS.S

match function will do that, but it requires extensions, is there a way to do it without using extensions?


--- 2 ---
Specifically, I need to parse version in format:
<major>.<minor>.<build>.<revision>

Split works just fine, but I would like to do it with regex instead.


--- 3 ---
What is the "nice" way of parsting this string?

Regards,
Roman V. Gavrilov

 

[futurelet]

Standard Awk does not "capture" the values of groups in regular expressions. However, Gawk has gensub, which will let you do what you want (I think; haven't used it myself).

If you can't use Gawk:

BEGIN {
  string = "003ZAS.S"
  group1 = string; sub(/[^0-9]+/, "", group1)
  group2 = string; sub(/^.*[0-9]Z/, "", group2)
  print group1, group2
}

Specifically, I need to parse version in format:
<major>.<minor>.<build>.<revision>

Split works just fine, but I would like to do it with regex instead.

What's wrong with using split? It's probably faster than capturing groups in a regular expression.

 

[clavrg]

Thank you, futurlet,

Will check sub once have a chance.

Regarding using split - it will work for this particular case, though it is not as general as regex. Consider situation if I will decide to change format to something more exotic, e.g. 13.30-3.b#some comments with regex fixed quickly it will be.

Regards,
Roman V. Gavrilov

 

[futurelet]

Consider situation if I will decide to change format to something more exotic, e.g. 13.30-3.b#some comments

split("13.30-3.b#some comments",a,"[-.#]")

 

[clavrg]

<comment>#<major>.<minor>-<build>.<revision_letter>
something-with-dashes.and.dots#13.30-3.b