sifflet-lib-1.0: Library of modules shared by sifflet and its tests and its exporters. Source code Contents Index

Sifflet.Language.Parser

Description

A parser for Sifflet input values. This is not a parser for all Sifflet expressions, but just those that might be input in textual form through the function call dialog that asks for the argument values. So, it is limited (deliberately) to data types of expressions: that is, Exprs using the constructors: ELit EList That means excluding Exprs constructed with EUndefined, ESymbol, EIf, and ECall.

Synopsis

parseExpr :: String -> SuccFail Expr parseInput :: String -> SuccFail Expr parseTest :: Show a => GenParser tok () a -> [tok] -> IO () parseSuccFail :: Parser a -> String -> SuccFail a nothingBut :: Parser a -> Parser a expr :: Parser Expr list :: Parser a -> Parser [a] literal :: Parser Expr value :: Parser Value typedValue :: VpType -> Parser Value bool :: Parser Bool qchar :: Parser Char qstring :: Parser String integer :: Parser Integer double :: Parser Double number :: Parser (Either Double Integer)

Documentation

parseExpr :: String -> SuccFail Expr Source

Parse a Sifflet data literal (number, string, char, bool, or list)

parseInput :: String -> SuccFail Expr Source

Parse a Sifflet input containing exactly one data expression possibly flanked by white space

parseTest :: Show a => GenParser tok () a -> [tok] -> IO () Source

parseSuccFail :: Parser a -> String -> SuccFail a Source

nothingBut :: Parser a -> Parser a Source

'nothingBut p is like p, but consumes the entire input, so there must be no extraneous characters (except space) after whatever p parses.

expr :: Parser Expr Source

Parse a Sifflet data expression

list :: Parser a -> Parser [a] Source

literal :: Parser Expr Source

value :: Parser Value Source

Parser for a Value of any type (any VpType), except that we cannot parse as VpTypeVar or VpTypeFunction.

typedValue :: VpType -> Parser Value Source

Parser for a value with a specific VpType expected. Again, we cannot do this for VpTypeVar (why not?) or VpTypeFunctiopn

bool :: Parser Bool Source

qchar :: Parser Char Source

qstring :: Parser String Source

integer :: Parser Integer Source

double :: Parser Double Source

number :: Parser (Either Double Integer) Source

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