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The content of this article introduces the knowledge of "how to create API + API in Rust". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Meta: a DSL parsing library for parsing human readable text

# dsl # parsing

Can be used for language design, custom format and data-driven development. The library provides a rule called "meta language" that tells the program how to read the document to be parsed. These documents are in human-readable format.

Minimize examples:

Use piston_meta::*

Fn main () {

Let text = r # "hi James!" #

Let rules = r # "

1 say_hi = ["hi" .w? {"James": "james"Peter": "peter"} "!"]

2 document = say_hi

"#

/ / Parse rules with meta language and convert to rules for parsing text.

Let rules = syntax_errstr (rules). Unwrap ()

Let mut data = vec! []

Parse_errstr (& rules, text, & mut data)

Json::print & data)

}

Output: "james": true

Meta

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