Dhall.Parser.Token

Parse Dhall tokens. Even though we don't have a tokenizer per-se this

Documentation

endOfLine :: Parser Text

Match an end-of-line character sequence

validCodepoint :: Int -> Bool

Returns True if the given Int is a valid Unicode codepoint

whitespace :: Parser ()

Parse 0 or more whitespace characters (including comments)

This corresponds to the whsp rule in the official grammar

lineComment :: Parser Text

Parse a Dhall's single-line comment, starting from `--` and until the last character of the line before the end-of-line character

lineCommentPrefix :: Parser Text

Same as lineComment except that this doesn't parse the end-of-line character

blockComment :: Parser Text

Parsed text doesn't include opening braces

nonemptyWhitespace :: Parser ()

Parse 1 or more whitespace characters (including comments)

This corresponds to the whsp1 rule in the official grammar

bashEnvironmentVariable :: Parser Text

Parse a valid Bash environment variable name

This corresponds to the bash-environment-variable rule in the official grammar

posixEnvironmentVariable :: Parser Text

Parse a valid POSIX environment variable name, which permits a wider range of characters than a Bash environment variable name

This corresponds to the posix-environment-variable rule in the official grammar

data ComponentType

The pathComponent function uses this type to distinguish whether to parse a URL path component or a file path component

Constructors

URLComponent

FileComponent

text :: Text -> Parser Text

A variation on text that doesn't quote the expected in error messages

char :: Char -> Parser Char

A variation on char that doesn't quote the expected token in error messages

file_ :: ComponentType -> Parser File

Parse a File

label :: Parser Text

Parse a label (e.g. a variable/field/alternative name)

Rejects labels that match built-in names (e.g. Natural/even)

This corresponds to the nonreserved-label rule in the official grammar

anyLabelOrSome :: Parser Text

Same as anyLabel except that Some is allowed

This corresponds to the any-label-or-some rule in the official grammar

anyLabel :: Parser Text

Same as label except that built-in names are allowed

This corresponds to the any-label rule in the official grammar

labels :: Parser [Text]

Parse a braced sequence of comma-separated labels

For example, this is used to parse the record projection syntax

This corresponds to the labels rule in the official grammar

httpRaw :: Parser URL

Parse an HTTP(S) URL without trailing whitespace

This corresponds to the http-raw rule in the official grammar

hexdig :: Char -> Bool

Parse a hex digit (uppercase or lowercase)

This corresponds to the HEXDIG rule in the official grammar

identifier :: Parser Var

Parse an identifier (i.e. a variable or built-in)

Variables can have an optional index to disambiguate shadowed variables

This corresponds to the identifier rule from the official grammar

hexNumber :: Parser Int

Parse a hexademical number and convert to the corresponding Int

signPrefix :: Num a => Parser (a -> a)

Parse a leading + or - sign

doubleLiteral :: Parser Double

Parse a Double literal

This corresponds to the double-literal rule from the official grammar

doubleInfinity :: Parser Double

Parse a signed Infinity

This corresponds to the minus-infinity-literal and plus-infinity-literal rules from the official grammar

naturalLiteral :: Parser Natural

Parse a Natural literal

This corresponds to the natural-literal rule from the official grammar

integerLiteral :: Parser Integer

Parse an Integer literal

This corresponds to the integer-literal rule from the official grammar

dateFullYear :: Parser Integer

Parse a 4-digit year

This corresponds to the date-fullyear rule from the official grammar

dateMonth :: Parser Int

Parse a 2-digit month

This corresponds to the date-month rule from the official grammar

dateMday :: Parser Int

Parse a 2-digit day of the month

This corresponds to the date-mday rule from the official grammar

timeHour :: Parser Int

Parse a 2-digit hour

This corresponds to the time-hour rule from the official grammar

timeMinute :: Parser Int

Parse a 2-digit minute

This corresponds to the time-minute rule from the official grammar

timeSecond :: Parser Pico

Parse a 2-digit second

This corresponds to the time-second rule from the official grammar

timeSecFrac :: Parser (Pico, Word)

Parse the fractional component of a second

This corresponds to the time-secfrac rule from the official grammar

_Optional :: Parser ()

Parse the Optional built-in

This corresponds to the Optional rule from the official grammar

_if :: Parser ()

Parse the if keyword

This corresponds to the if rule from the official grammar

_then :: Parser ()

Parse the then keyword

This corresponds to the then rule from the official grammar

_else :: Parser ()

Parse the else keyword

This corresponds to the else rule from the official grammar

_let :: Parser ()

Parse the let keyword

This corresponds to the let rule from the official grammar

_in :: Parser ()

Parse the in keyword

This corresponds to the in rule from the official grammar

_as :: Parser ()

Parse the as keyword

This corresponds to the as rule from the official grammar

_using :: Parser ()

Parse the using keyword

This corresponds to the using rule from the official grammar

_merge :: Parser ()

Parse the merge keyword

This corresponds to the merge rule from the official grammar

_toMap :: Parser ()

Parse the toMap keyword

This corresponds to the toMap rule from the official grammar

_showConstructor :: Parser ()

Parse the showConstructor keyword

This corresponds to the showConstructor rule from the official grammar

_assert :: Parser ()

Parse the assert keyword

This corresponds to the assert rule from the official grammar

_Some :: Parser ()

Parse the Some built-in

This corresponds to the Some rule from the official grammar

_None :: Parser ()

Parse the None built-in

This corresponds to the None rule from the official grammar

_NaturalFold :: Parser ()

Parse the Natural/fold built-in

This corresponds to the Natural-fold rule from the official grammar

_NaturalBuild :: Parser ()

Parse the Natural/build built-in

This corresponds to the Natural-build rule from the official grammar

_NaturalIsZero :: Parser ()

Parse the Natural/isZero built-in

This corresponds to the Natural-isZero rule from the official grammar

_NaturalEven :: Parser ()

Parse the Natural/even built-in

This corresponds to the Natural-even rule from the official grammar

_NaturalOdd :: Parser ()

Parse the Natural/odd built-in

This corresponds to the Natural-odd rule from the official grammar

_NaturalToInteger :: Parser ()

Parse the Natural/toInteger built-in

This corresponds to the Natural-toInteger rule from the official grammar

_NaturalShow :: Parser ()

Parse the Natural/show built-in

This corresponds to the Natural-show rule from the official grammar

_NaturalSubtract :: Parser ()

Parse the Natural/subtract built-in

This corresponds to the Natural-subtract rule from the official grammar

_IntegerClamp :: Parser ()

Parse the Integer/clamp built-in

This corresponds to the Integer-clamp rule from the official grammar

_IntegerNegate :: Parser ()

Parse the Integer/negate built-in

This corresponds to the Integer-negate rule from the official grammar

_IntegerShow :: Parser ()

Parse the Integer/show built-in

This corresponds to the Integer-show rule from the official grammar

_IntegerToDouble :: Parser ()

Parse the Integer/toDouble built-in

This corresponds to the Integer-toDouble rule from the official grammar

_DoubleShow :: Parser ()

Parse the Double/show built-in

This corresponds to the Double-show rule from the official grammar

_ListBuild :: Parser ()

Parse the List/build built-in

This corresponds to the List-build rule from the official grammar

_ListFold :: Parser ()

Parse the List/fold built-in

This corresponds to the List-fold rule from the official grammar

_ListLength :: Parser ()

Parse the List/length built-in

This corresponds to the List-length rule from the official grammar

_ListHead :: Parser ()

Parse the List/head built-in

This corresponds to the List-head rule from the official grammar

_ListLast :: Parser ()

Parse the List/last built-in

This corresponds to the List-last rule from the official grammar

_ListIndexed :: Parser ()

Parse the List/indexed built-in

This corresponds to the List-indexed rule from the official grammar

_ListReverse :: Parser ()

Parse the List/reverse built-in

This corresponds to the List-reverse rule from the official grammar

_Bool :: Parser ()

Parse the Bool built-in

This corresponds to the Bool rule from the official grammar

_Natural :: Parser ()

Parse the Natural built-in

This corresponds to the Natural rule from the official grammar

_Integer :: Parser ()

Parse the Integer built-in

This corresponds to the Integer rule from the official grammar

_Double :: Parser ()

Parse the Double built-in

This corresponds to the Double rule from the official grammar

_Text :: Parser ()

Parse the Text built-in

This corresponds to the Text rule from the official grammar

_TextReplace :: Parser ()

Parse the Text/replace built-in

This corresponds to the Text-replace rule from the official grammar

_TextShow :: Parser ()

Parse the Text/show built-in

This corresponds to the Text-show rule from the official grammar

_Date :: Parser ()

Parse the Date bult-in

This corresponds to the Date rule from the official grammar

_Time :: Parser ()

Parse the Time bult-in

This corresponds to the Time rule from the official grammar

_TimeZone :: Parser ()

Parse the TimeZone bult-in

This corresponds to the TimeZone rule from the official grammar

_List :: Parser ()

Parse the List built-in

This corresponds to the List rule from the official grammar

_True :: Parser ()

Parse the True built-in

This corresponds to the True rule from the official grammar

_False :: Parser ()

Parse the False built-in

This corresponds to the False rule from the official grammar

_NaN :: Parser ()

Parse a NaN literal

This corresponds to the NaN rule from the official grammar

_Type :: Parser ()

Parse the Type built-in

This corresponds to the Type rule from the official grammar

_Kind :: Parser ()

Parse the Kind built-in

This corresponds to the Kind rule from the official grammar

_Sort :: Parser ()

Parse the Sort built-in

This corresponds to the Sort rule from the official grammar

_Location :: Parser ()

Parse the Location keyword

This corresponds to the Location rule from the official grammar

_equal :: Parser ()

Parse the = symbol

_or :: Parser ()

Parse the || symbol

_plus :: Parser ()

Parse the + symbol

_textAppend :: Parser ()

Parse the ++ symbol

_listAppend :: Parser ()

Parse the # symbol

_and :: Parser ()

Parse the && symbol

_times :: Parser ()

Parse the * symbol

_doubleEqual :: Parser ()

Parse the == symbol

_notEqual :: Parser ()

Parse the != symbol

_dot :: Parser ()

Parse the . symbol

_openBrace :: Parser ()

Parse the { symbol

_closeBrace :: Parser ()

Parse the } symbol

_openBracket :: Parser ()

Parse the [] symbol

_closeBracket :: Parser ()

Parse the ] symbol

_openAngle :: Parser ()

Parse the < symbol

_closeAngle :: Parser ()

Parse the > symbol

_bar :: Parser ()

Parse the | symbol

_comma :: Parser ()

Parse the , symbol

_openParens :: Parser ()

Parse the ( symbol

_closeParens :: Parser ()

Parse the ) symbol

_colon :: Parser ()

Parse the : symbol

_at :: Parser ()

Parse the @ symbol

_equivalent :: Parser CharacterSet

Parse the equivalence symbol (=== or ≡)

_missing :: Parser ()

Parse the missing keyword

_importAlt :: Parser ()

Parse the ? symbol

_combine :: Parser CharacterSet

Parse the record combine operator (/\ or ∧)

_combineTypes :: Parser CharacterSet

Parse the record type combine operator (//\\ or ⩓)

_prefer :: Parser CharacterSet

Parse the record "prefer" operator (// or ⫽)

_lambda :: Parser CharacterSet

Parse a lambda (\ or λ)

_forall :: Parser CharacterSet

Parse a forall (forall or ∀)

_arrow :: Parser CharacterSet

Parse a right arrow (-> or →)

_doubleColon :: Parser ()

Parse a double colon (::)

_with :: Parser ()

Parse the with keyword