Moduleghc-9.14.1GHC2021

GHC.Utils.Lexeme

Contents

Synopsis

Lexical characteristics of Haskell names

Use these functions to figure what kind of name a FastString represents; these functions do not check that the identifier is valid.

valueisLexCon :: FastString -> Bool

valueisLexVar :: FastString -> Bool

valueisLexId :: FastString -> Bool

valueisLexSym :: FastString -> Bool

valueisLexConId :: FastString -> Bool

valueisLexConSym :: FastString -> Bool

valueisLexVarId :: FastString -> Bool

valueisLexVarSym :: FastString -> Bool

valuestartsVarSym :: Char -> Bool

valuestartsVarId :: Char -> Bool

valuestartsConSym :: Char -> Bool

valuestartsConId :: Char -> Bool

These functions (working over plain old Strings) check to make sure that the identifier is valid.

valueokVarOcc :: String -> Bool

Is this an acceptable variable name?

valueokConOcc :: String -> Bool

Is this an acceptable constructor name?

valueokTcOcc :: String -> Bool

Is this an acceptable type name?

valueokVarIdOcc :: String -> Bool

Is this an acceptable alphanumeric variable name, assuming it starts with an acceptable letter?

valueokVarSymOcc :: String -> Bool

Is this an acceptable symbolic variable name, assuming it starts with an acceptable character?

valueokConIdOcc :: String -> Bool

Is this an acceptable alphanumeric constructor name, assuming it starts with an acceptable letter?

valueokConSymOcc :: String -> Bool

Is this an acceptable symbolic constructor name, assuming it starts with an acceptable character?