Proper ways for Multiline String and String Interpolation

[swety2003]

Is there a suitable way to implement multi-line string and string interpolation like C #?

[b3b00]

hello @swety2003 , using GenericLexer , the String lexeme should natively handle multiline strings.

Regarding string interpolation, I think the best way is using GenericLexer modes

hope this would help

Olivier

[b3b00]

@swety2003 are you ok with my answer ?
Could you close thé issue please ?

[swety2003]

Well, GenericLexer can indeed solve the problem of multi line strings, but the delimiter can only be one character. How can we parse strings with multiple characters as delimiters？

    [String(delimiter:"\"\"")]
    STRING,

LEXER_STRING_DELIMITER_MUST_BE_1_CHAR [FATAL] bad lexem "" : StringToken lexeme delimiter char must be 1 character length

[b3b00]

@swety2003 could you please explain precisely what kind of token you are trying to parse ?

[swety2003]

For example:

configureFlags = ""
  -system-zlib -system-libpng -system-libjpeg
  ${if openglSupport then "-dlopen-opengl
    -L${mesa}/lib -I${mesa}/include
    -L${libXmu}/lib -I${libXmu}/include" else ""}
  ${if threadSupport then "-thread" else "-no-thread"}
"";

[b3b00]

So, to sum up you need a string that

• starts and ends with double double quotes ""...""
• Can contain interpolated expressions surrounded by braces {}. Those expressions may contains strings, with one double quote as delimiter

Then the generic lexer modes is the way to go.

[swety2003]

OK, thank you for your help, I'll try to use it to solve the problem.

[b3b00]

You Can take a look at https://github.com/b3b00/csly/tree/dev/src/samples/SimpleTemplate for inspiration.

[b3b00]

@swety2003 , to fix issue #495 i've done what you want in the IndentedwhileParser. you can take a look it should answer most of your need