Parser error type.

Represents parser input.

The main parser type.'a denotes the successful parse value while 'error denotes error raised by the parser.

advance n advances parser by the given n number of characters. Always succeeds.

end_of_input returns true if parser has reached end of input. Always succeeds.

parse input p executes parser p with input input.

char c accepts character c from input exactly and returns it. Fails Otherwise.

char_if f accepts and returns Some c if f c is true. Otherwise it returns None. Always succeeds.

satisfy f accepts a char c from input if f c is true and returns it. Otherwise it fails.

peek_char t returns a character at the current position in the parser. Always suceeds and returns None if EOF is reached.

Same as peek_char except the call fails if end of input is encountered.

any_char accepts any char and returns it. Fails if EOF reached.

peek_string n attempts to match string of length n from input exactly and return it. If it isn't matched None is returned.

string s accepts s exactly and returns it.

string_if s accepts and returns Some s if s matches input. Otherwise returns None. Always succeeds.

skip_while f keeps accepting c if f c is true. c is discarded. Always succeeds.

count_skip_while f accepts characters from input while f c is true and records the count of times the input char was accepted. The accepted chars are discarded and the count is returned.

count_skip_while_string n f accepts string s of length n if f s is true. The accepted string s is discarded and the count of times the string was accepted is noted. The count is then returned.

take_while f keeps accepting character c from input while f c is true. It then concatenates the accepted characters and converts it into a string and returns it.

take_while_n n f similar in functionality to take_while. The parser however has a maximum upper bound n on the number of characters it accepts.

ok v creates a new parser that always returns the constant v.

fail err creates a parser that always fails with err.

p <|> q creates a parser that executes p and returns the result if it is successful. If false then it executes q and returns it.

p >>= q executes p and if it succeeds executes q and returns it's result else it returns the result of executing p.

p >>| f executes p and then if it is successful returns a. It then executes f a and returns the result.

p >>|? f executes p and maps error via f error if p results in error.

p >>*? e executes p and returns error e discarding error if p fails.

p *> b is p >>= fun _ -> b

p <* q discards result from q and returns p

p *>| a is p >>| fun _ -> a

many p runs p zero or more times and returns a list of results from the runs of p.

count_skip_many p runs p zeor or more times

line accepts and returns a line of input delimited by either \n or \r\n. Returns None if end of input is reached.