- parseKV :: PermParser Parser a -> Text -> Either String a
- value :: Text -> Parser Text
- values :: Text -> Parser [Text]
- (<$?>) :: (a -> b) -> (a, p a) -> PermParser p b
- (<||>) :: PermParser p (a -> b) -> p a -> PermParser p b
- (<$$>) :: (a -> b) -> p a -> PermParser p b
- (<|?>) :: PermParser p (a -> b) -> (a, p a) -> PermParser p b
Documentation
parseKV :: PermParser Parser a -> Text -> Either String aSource
Parse a key-value string wrapper constructed via the permutation
parser combinators from Text.Parsec.Perm
and the parsers value
and values
.
values :: Text -> Parser [Text]Source
values k
is a parser for the list-valued key k
. At least a
single value is required.
(<$?>) :: (a -> b) -> (a, p a) -> PermParser p b
The expression f <$?> (x,p)
creates a fresh permutation parser
consisting of parser p
. The the final result of the permutation
parser is the function f
applied to the return value of p
. The
parser p
is optional - if it can not be applied, the default value
x
will be used instead.
(<||>) :: PermParser p (a -> b) -> p a -> PermParser p b
The expression perm <||> p
adds parser p
to the permutation
parser perm
. The parser p
is not allowed to accept empty input -
use the optional combinator (<|?>
) instead. Returns a
new permutation parser that includes p
.
(<$$>) :: (a -> b) -> p a -> PermParser p b
The expression f <$$> p
creates a fresh permutation parser
consisting of parser p
. The the final result of the permutation
parser is the function f
applied to the return value of p
. The
parser p
is not allowed to accept empty input - use the optional
combinator (<$?>
) instead.
If the function f
takes more than one parameter, the type variable
b
is instantiated to a functional type which combines nicely with
the adds parser p
to the (<||>
) combinator. This
results in stylized code where a permutation parser starts with a
combining function f
followed by the parsers. The function f
gets its parameters in the order in which the parsers are specified,
but actual input can be in any order.
(<|?>) :: PermParser p (a -> b) -> (a, p a) -> PermParser p b
The expression perm <||> (x,p)
adds parser p
to the
permutation parser perm
. The parser p
is optional - if it can
not be applied, the default value x
will be used instead. Returns
a new permutation parser that includes the optional parser p
.