j kongerjanet
mountains and websites

janet

Posts tagged with janet

    Janet PEGs don't accept unicode??

    nope! not easily, at least. you can match unicode characters, but NOTHING is made easy for you, the way a regex /u flag will. that said, its still possible with use of (to)

    look, for example, at a truncated version of a PEG i’m writing to pull info from a french/english dictionary:

    (def dict-result-peg
      ~{
        # ... catch some stuff
        :pronunciation (* "/" (to "/") "/")
        # ... and so on
       })
     

    i wanna catch all the character in the words IPA prnounciation, which luckily enough are surrounded by /s. since janets PEGs don’t allow for a character class range of unicode prononciation strings, i instead use a (to "/") to grab all the text between delimiters. it’s imprecise, but in this instance perfect, as i know ill never get a / in the prnonciation guide

    How to match til the end of an input string with a janet peg

    aka a parsing expression grammar, aka the only reason i wanna use janet:

    to match all the rest of the content in a string, use this:

    (any 1)

    unlike most else i seen in PEGs, this is hella unclear. it literally means, more or less, match any amount of single characters, but god does that not help. instead, i think of it like “match anyone”: get anyone left.