Comment by penteract

1 year ago

I think the author has underestimated the power of the substitution rules - it looks like it should be possible to drag a state machine along, hence recognise any regular language. Something like the following should handle quoted strings (untested and needs every character to be listed out in the definitions of @Char, @CharQuoted and @NonQuoteQuoted):

    sub Quote @Char' by @CharQuoted;
    sub Backslash.quoted Backslash' by Backslash.quoted2;
    sub Backslash.quoted Quote' by Quote.escaped;
    sub [@NonQuoteQuoted Quote.escaped Backslash.quoted2] @Char' by @CharQuoted;

I don't know if context can be carried between different lines.

7 comments

penteract

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california-og  1 year ago

That's genius, thank you!! I will have to try that tomorrow but I have a feeling it might just work : - )

  • penteract  1 year ago

    Here's a tested version that, given text containing only lower case letters, backslash and double quote, capitalizes the letters between quotes and handles escaping reasonably. (works with NotoSans-Regular.ttf)

        @Char = [a-z quotedbl backslash];
    @CharQuoted = [A-Z quotesingle slash];
    @NonQuoteQuoted = [A-Z slash];
    @Escaped = [asterisk dollar];
    
    feature liga {
      lookup xa {
        sub quotedbl @Char' by @CharQuoted;
        sub slash backslash' by dollar; 
        sub slash quotedbl' by asterisk;
        sub [@NonQuoteQuoted asterisk dollar] @Char' by @CharQuoted;
      } xa;
    } liga;
    feature liga {
      lookup xb {
        sub quotesingle' by quotedbl;
        sub slash' by backslash;
        sub dollar' by  backslash;
        sub asterisk' by quotedbl;
      } xb;
    } liga;

    • ajudson  1 year ago

      Do you know if there is a programmatic way to convert multi character to multi character without intermediate glyphs? E.G. snake -> snāk

      1 reply →

gcr  1 year ago

Imagine cross-compiling a 60MB tree-sitter grammar into your OpenFont file’s metadata!