| Safe Haskell | None |
|---|---|
| Language | GHC2021 |
Yamlet.Internal.Utils
Description
Helpers for the other modules.
This module is intended for internal use only, and may change without warning in subsequent releases.
Synopsis
- textStripPrefix :: Text -> Text -> Maybe Text
- textIsPrefixOf :: Text -> Text -> Bool
- maxImplicitKeyLength :: Int
- maxVersion :: Int
- minExpansion :: Int
- coreTagPrefix :: Text
- picoDecimals :: Int
- decimalPlaces :: Integer -> Maybe Int
- isHighSurrogate :: Int -> Bool
- isLowSurrogate :: Int -> Bool
- fromSurrogates :: Int -> Int -> Int
- isScalarValue :: Int -> Bool
- xEscapeDigits :: Int
- uEscapeDigits :: Int
- bigUEscapeDigits :: Int
- percentDigits :: Int
- showText :: Text -> String
- strictPair :: a -> b -> (a, b)
- strictMap :: (a -> b) -> [a] -> [b]
- firstOfResult :: Either e (a, b) -> Either e a
Documentation
textStripPrefix :: Text -> Text -> Maybe Text Source #
stripPrefix. Before text 2.1.4, stripPrefix
compares the texts as streams of characters and allocates for each
character. For these versions this is the code of text 2.1.4, which
compares the UTF-8 bytes.
textIsPrefixOf :: Text -> Text -> Bool Source #
isPrefixOf, with the code of text 2.1.4 as in
textStripPrefix.
maxImplicitKeyLength :: Int Source #
The largest number of characters of an implicit key, from the YAML 1.2.2 specification.
maxVersion :: Int Source #
The largest number in a version of a %YAML directive.
Without a limit, the largest number depends on the size of Int, which differs between architectures. The limit is far above any version of YAML, and a number below it times 10 fits in 32 bits.
minExpansion :: Int Source #
The size that an expansion of a small input can always add: the visits
that aliases add to a traversal, or the bytes that the prefixes of %TAG
directives add to the tags. A larger input can add as much as it has.
A traversal of 100000 nodes takes about 5 ms and 6 MB, measured with a copy of the nodes. go-yaml allows about 400000 nodes from aliases in a small document.
coreTagPrefix :: Text Source #
The prefix of the tags of the core schema, and of the !! handle.
picoDecimals :: Int Source #
The number of decimal places of Pico, the resolution of the durations of
the time library.
decimalPlaces :: Integer -> Maybe Int Source #
The number of decimal places of 1n, or Nothing if 1n has no finite
decimal form. It has one if n is 2^a * 5^b, and then it needs max a b
places.
isHighSurrogate :: Int -> Bool Source #
The first code unit of a surrogate pair of UTF-16.
isLowSurrogate :: Int -> Bool Source #
The second code unit of a surrogate pair of UTF-16.
fromSurrogates :: Int -> Int -> Int Source #
The code point of a surrogate pair, by the formula of UTF-16.
isScalarValue :: Int -> Bool Source #
A code point that a character can have: in the range of Unicode, and not a surrogate.
xEscapeDigits :: Int Source #
The number of hex digits of the \x, \u and \U escapes of a
double-quoted scalar.
uEscapeDigits :: Int Source #
The number of hex digits of the \x, \u and \U escapes of a
double-quoted scalar.
bigUEscapeDigits :: Int Source #
The number of hex digits of the \x, \u and \U escapes of a
double-quoted scalar.
percentDigits :: Int Source #
The number of hex digits of a %XX escape in a tag.
showText :: Text -> String Source #
The text in double quotes for a message, with the escapes of a
double-quoted scalar for a quote, a backslash and a character that does
not print, so that the message stays on one line. Unlike show, it keeps
the other characters that are not ASCII, e.g. "zażółć".
strictPair :: a -> b -> (a, b) Source #
A pair with both components evaluated.
strictMap :: (a -> b) -> [a] -> [b] Source #
map with the spine and the elements of the result evaluated. The
results are in reverse until the end, so that the stack does not grow with
the length of the list.
firstOfResult :: Either e (a, b) -> Either e a Source #
The first component of a pair in a result. Unlike fmap fst