Crate graphql_parser

Graphql Parser

This library contains full parser and formatter of the graphql query language as well as AST types.

Docs | Github | Crate

Current this library supports full graphql syntax, and the following extensions:

1. Subscriptions
2. Block (triple quoted) strings
3. Schema definition language a/k/a IDL (which is still in RFC)

Example: Parse and Format Query

use graphql_parser::query::{parse_query, ParseError};

let ast = parse_query::<&str>("query MyQuery { field1, field2 }")?;
// Format canonical representation
assert_eq!(format!("{}", ast), "\
query MyQuery {
  field1
  field2
}
");

Example: Parse and Format Schema

use graphql_parser::schema::{parse_schema, ParseError};

let ast = parse_schema::<String>(r#"
    schema {
        query: Query
    }
    type Query {
        users: [User!]!,
    }
    """
       Example user object

       This is just a demo comment.
    """
    type User {
        name: String!,
    }
"#)?.to_owned();
// Format canonical representation
assert_eq!(format!("{}", ast), "\
schema {
  query: Query
}

type Query {
  users: [User!]!
}

\"\"\"
  Example user object

  This is just a demo comment.
\"\"\"
type User {
  name: String!
}
");

Modules

query	Query language AST and parsing utilities
schema	Schema definition language AST and utility

Structs

Pos	Original position of element in source code
Style	A configuration of formatting style

Functions

parse_query	Parses a piece of query language and returns an AST
parse_schema	Parses a piece of schema language and returns an AST