Module lexer

Lexer for semver ranges.

Breaks a string of input into an iterator of tokens that can be used with a parser.

This should be used with the parser module.

Examples

Example without errors:

use semver_parser::lexer::{Lexer, Token};

let mut l = Lexer::new("foo 123 *");

assert_eq!(Some(Ok(Token::AlphaNumeric("foo"))), l.next());
assert_eq!(Some(Ok(Token::Whitespace(3, 4))), l.next());
assert_eq!(Some(Ok(Token::Numeric(123))), l.next());
assert_eq!(Some(Ok(Token::Whitespace(7, 8))), l.next());
assert_eq!(Some(Ok(Token::Star)), l.next());
assert_eq!(None, l.next());

Example with error:

use semver_parser::lexer::{Lexer, Token, Error};

let mut l = Lexer::new("foo / *");

assert_eq!(Some(Ok(Token::AlphaNumeric("foo"))), l.next());
assert_eq!(Some(Ok(Token::Whitespace(3, 4))), l.next());
assert_eq!(Some(Err(Error::UnexpectedChar('/'))), l.next());

Structs

• Lexer
  Lexer for semver tokens belonging to a range.

Enums

• Error
• Token
  Semver tokens.