I'm looking for a cleaner solution if one exists. I'm highlighting Spanish verb endings. The regex I came up with seems to work but I can't help but be curious if there is a better way.

Here is what I came up with: (it's super long and I don't know how to prevent it from wrapping)

hilite_tail () {
    local WORD=$1
    local COLOR=$2
    PFX=$(echo $WORD | perl -pe 's/(.*)(ste(?=$)|e(?<!ste)(?=$)|es(?=$
+)|is(?<!(eis|ste))(?=$)|mos(?=$)|n(?<!ron)(?=$)|o(?=$)|ó(?=$)|.ron(?=
+$)|s(?<!(eis|.is|mos))(?=$)|steis(?=$)|é(?<!ué)(?=$)|í(?=$)|ué(?=$))/
+$1/g')
    SFX=$(echo $WORD | perl -pe 's/(.*)(ste(?=$)|e(?<!ste)(?=$)|es(?=$
+)|is(?<!(eis|ste))(?=$)|mos(?=$)|n(?<!ron)(?=$)|o(?=$)|ó(?=$)|.ron(?=
+$)|s(?<!(eis|.is|mos))(?=$)|steis(?=$)|é(?<!ué)(?=$)|í(?=$)|ué(?=$))/
+$2/g')
    [[ $PFX != $SFX ]] && echo "${CYAN_FG}$PFX${COLOR}$SFX${RESET}" ||
+ echo "${CYAN_FG}$WORD${RESET}" 
}

[download]

Using the advice I've now simplified:

hilite_tail () {
    local WORD=$1
    local COLOR=$2
    PFX=$(echo $WORD | perl -pe 's/(.*)(ste|(?<!st)e|es|is(?<!(eis|ste
+))|mos|(?<!ro)n|o|ó|.ron|s(?<!(.is|mos))|steis|(?<!u)é|í|ué)$/$1/g')
    SFX=$(echo $WORD | perl -pe 's/(.*)(ste|(?<!st)e|es|is(?<!(eis|ste
+))|mos|(?<!ro)n|o|ó|.ron|s(?<!(.is|mos))|steis|(?<!u)é|í|ué)$/$2/g')
    [[ $PFX != $SFX ]] && echo "${CYAN_FG}$PFX${COLOR}$SFX${RESET}" ||
+ echo "${CYAN_FG}$WORD${RESET}" 
}

[download]

Thanks

In reply to Looking for a cleaner regex by k-man

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