How ruby ​​interpreter interprets double quotes

Question

Background

I am using a Ruby - like language called Sapphire as a way to try out some of the ideas that I have on concurrency in programming languages. I am trying to copy double-quoted Ruby strings with embedded code, which I find very useful as a programmer.

Question

How does any Ruby interpreter include a double-quoted string with embedded code and AST?

eg:

puts "The value of foo is #{@foo}."

puts "this is an example of unmatched braces in code: #{ foo.go('}') }"

More details

The problem is how to decide which }code block closes. Blocks of code can have other braces inside them and with little effort they can be unsurpassed. A lexer can find the beginning of a code block in a string, but without the help of a parser, he cannot know exactly which character is the end of this block.

It looks like the Ruby file parse.yperforms both lexing and parsing steps, but reading this thing is a nightmare , it has 11,628 lines without comment and a lot of abbreviations.

Answer 1

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Answer 2

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Answer 3

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"before ${the + expression} after"

:

STRING_START "before "
IDENTIFIER   the
PLUS
IDENTIFIER   expression
STRING       " after"

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Answer 4

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Answer 5

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