Documentation

A type for building Automaton values. Monad and Applicative instances are defined for this type rather than for Automaton in order to avoid traversing the entire call stack for every input value.

Represents a nondeterministic computation in progress. There are 4 type parameters: a counter type (may be used for tracking line and column numbers), an input type, an incremental output type, and a final output type.

A data type for describing a position in a text file. Constructor arguments are row number and column number.

Class for types which have standardized or otherwise unambiguous representations. Implementations of regular may be more permissive than the corresponding Read instance (if any).

Take the incremental output of the first argument and use it as input for the second argument. Discard the final output of the first argument.

Change the counter type of a Phaser object. May cause getCount to behave differently from expected: counter increments inside the right hand argument are visible outside but not vice versa.

If parsing fails in the right argument: prepend the left argument to the errors

Use a Phase as a parser. Note that unlike other parsers the reported position in the input when the parser fails is the position reached when all parsing options are exhausted, not the beginning of the failing token. Since the characters may be counted nondeterministically: if multiple errors are returned the reported error position may be different for each error report.

Use a Phase value similarly to a parser.

Run a parser on input from a file. Input is provided as bytes, if characters are needed: a decoding phase such as utf8_stream or latin1 may be used.

Run a parser on input from a file. Input is provided as bytes, if characters are needed: a decoding phase such as utf8_stream or latin1 may be used. Counter type agnostic version.

Run a parser on input from a handle. Input is provided as bytes, if characters are needed: a decoding phase such as utf8_stream may be used.

Run a parser from the contents of a Handle. Input is provided as bytes.

Return one item of the input.

Increment the counter

Yield one item for the incremental output

Insert one value back into the input. May be used for implementing lookahead. Can have counter-intuitive interactions with getCount.

Put a list of values back into the input. Can have counter-intuitive interactions with getCount

Pass a list of input values to an Automaton

Pass one input to an automaton

Take either counters with errors or a list of possible results from an automaton.

Consume one input, return it if it matches the predicate, otherwise fail.

Consume one input, if it's equal to the parameter then return it, otherwise fail.

match specialized to Char

Case insensitive version of char

Match a list of input values

Match a string (case insensitive)

Parse a number either from decimal digits or from hexadecimal prefixed with "0x"

Parse a number from decimal digits, "-", and "."

Parse a number from standard decimal format or from scientific notation.

sepBy p sep parses zero or more occurrences of p, separated by sep. Returns a list of values returned by p.

Parses the first zero or more values satisfying the predicate. Always succeds, exactly once, having consumed all the characters Hence NOT the same as (many (satisfy p))

Parses the first one or more values satisfying the predicate. Succeeds if at least one value matches, having consumed all the characters Hence NOT the same as (some (satisfy p))

Count the lines and characters from the input before yielding them again. If the phase pipeline does not include this or similar: parsing errors will not report the correct position. Unix, Windows, Mac-OS Classic, and Acorn newline formats are all recognized.