Module Make.Parser A parser p is a sink of token. As long as it signals needs_more p more token can be pushed into the parser via put token p or the input stream can be ended via put_end p.
has_ended p is equivalent to not (needs_more p). has_ended p signals that the parser has either succeeded or failed.
If it has succeeded the final value is available via final p.
val needs_more : t -> needs_more p Does the parser p need more tokens?
put tok p Push token tok into the parser p.
Even if the parser has ended, more tokens can be pushed into the parser. The parser stores the token as lookahead token.
If the parser has already received the end of the token stream via put_end
put_end p Push and end token into the parser p.
Type of the final result.
val has_succeeded : t -> has_succeeded p Has the parser p succeeded?
val has_ended : t -> has_ended p Has the parser p ended parsing and either succeeded or failed?
has_ended p is the same as not (needs_more p)
final p The final object constructed by the parser p in case of success.
Precondition: has_succeeded p
val has_failed_syntax : t -> has_failed_syntax p Has the parser p failed with a syntax error?
val failed_expectations : t -> expect listfailed_expectations p The failed expectations due to a syntax error.
Precondition: has_failed_syntax p
val has_failed_semantic : t -> Has the parser failed because of a semantic error?
The semantic error encountered.
Precondition: A semantic error has occurred.
Type of the state of the parser (in many cases unit)
val has_lookahead : t -> has_lookahead p Are there any unconsumed lookahead tokens in the buffer or has the end token not yet been consumed?
val first_lookahead_token : t -> token optionThe first lookahead token (or None in case there is none).
val has_received_end : t -> has_received_end p Has the parser p already received the end of token stream via put_end?
val has_consumed_end : t -> has_consumed_end p Has the parser p already received the end of token stream via put_end and consumed it?
val fold_lookahead : 'a -> (token -> 'a -> 'a ) -> ('a -> 'a ) -> t -> 'a fold_lookahead a ftok fend p
Fold the lookahead tokens with the start value a and the folding function ftok. At the end of the lookahead tokens, call fend if there is an unconsumed end.
val transfer_lookahead : t -> t -> t transfer_lookahead p_old p_new
Transfer the lookahead tokens from p_old to p_new
val lookaheads : t -> token arraylookaheads p The lookahead token and and end flag of the parser p.
The end flag indicates that the end token has already been received via put_end p.
position p The current position in the input stream.
Can be called at any time.
line p The current line in the input stream.
Can be called at any time.
column p The current column in the input stream.
Can be called at any time.
val byte_column : t -> byte_column p The current byte_column in the input stream.
Can be called at any time.
val run_on_string : string -> t -> t run_on_string str p Run the parser p on the string str.
val run_on_string_at : int -> string -> t -> t run_on_string str start p Run the parser p on the string str starting at index start Return the parser and the index next to be pushed in.
run_on_channel ic p Run the parser p on input channel ic.