Hello everybody,
to make it easier to see how/where a RE does (or does not) match I've started
a branch on github:
https://github.com/phmarek/cl-ppcre/tree/debugging
During compile-time cl-ppcre::*do-debug* decides whether some tracing output
is returned by the compiled match function.
Example for a successful match:
> (cl-ppcre:scan-to-strings #?r(^abc(d|(e+)|fff)[xyz]+) "abcfffzzxzx")
*string*: "abcfffzzxzx"
SEQ [ 0 0[
ANCHOR [ 0 0[ ANCHOR
STR [ 0 3[ "abc"
REGISTER [ 3 3[ $1
ALTERNATION [ 3 3[
STR [ 3 3[ ""
REGISTER [ 3 3[ $2
SEQ [ 3 3[
STR [ 3 3[ ""
STR [ 3 6[ "fff"
CHAR-CLASS [ 6 7[ [#<CLOSURE (LAMBDA (CHAR) ...
REPETITION [ 7 11[
"abcfffzzxzx"
#("fff" NIL)
Example for a non-matching try:
> (cl-ppcre:scan-to-strings #?r(^abc(d|(e+)|fff)[xyz]+) "abcffffz")
*string*: "abcffffz"
SEQ [ 0 0[
ANCHOR [ 0 0[ ANCHOR
STR [ 0 3[ "abc"
REGISTER [ 3 3[ $1
ALTERNATION [ 3 3[
STR [ 3 3[ ""
REGISTER [ 3 3[ $2
SEQ [ 3 3[
STR [ 3 3[ ""
STR [ 3 6[ "fff"
CHAR-CLASS NO MATCH [#<CLOSURE (LAMBDA (CHAR) :IN ...
NIL
I think this might be useful for other people, so please provide some
feedback.
Is the documentations' source doc/index.html? Then I'd provide some text
there, too.
Regards,
Phil
