Dictionary returns a list of all keywords and builtins of the language.

NewLexer creates a new scanner type that reads the input provided.

Parse reads the program named name from the input, and if successful returns an ast.Node for the root of the AST, otherwise parser errors.

EOF is a marker for end of file.

A lexer holds the state of the scanner.

Sexp is for converting program syntax trees into typed s-expression for printing.

Token describes a lexed Token from the input, containing its type, the original text of the Token, and its position in the input.

Unparser is for converting program syntax trees back to program text.

Kind enumerates the types of lexical tokens in a mtail program.