Using Parsec to parse regular expressions - Stack Overflow 13 You should use Parsec Expr buildExprParser; it is ideal for this purpose You simply describe your operators, their precedence and associativity, and how to parse an atom, and the combinator builds the parser for you! You probably also want to add the ability to group terms with parens so that you can apply * to more than just a single literal
Simply using parsec in python - Stack Overflow The design of parsec requires a Parser to act independently on an input stream without knowledge of any other Parser To do this effectively a Parser must manage an index position of the input string
ghc error: hidden package, but its actually exposed Could not load module ‘Text Parsec’ It is a member of the hidden package ‘parsec-3 1 14 0’ You can run ‘:set -package parsec’ to expose it However, the package is supposed to be exposed already: ghc-pkg list gives
Parsec vs Yacc Bison Antlr: Why and when to use Parsec? 44 I'm new to Haskell and Parsec After reading Chapter 16 Using Parsec of Real World Haskell, a question appeared in my mind: Why and when is Parsec better than other parser generators like Yacc Bison Antlr? My understanding is that Parsec creates a nice DSL of writing parsers and Haskell makes it very easy and expressive
parsing - Parsec `try` should backtrack - Stack Overflow Isn't Parsec's try supposed to backtrack when it encounters failure? For instance, if I have the code import Control Applicative (( lt;| gt;)) import Debug Trace import Text Parsec (try) import Text
Whats the cleanest way to do case-insensitive parsing with Text . . . No, Parsec cannot do that in clean way string is implemented on top of primitive tokens combinator that is hard-coded to use equality test (==) It's a bit simpler to parse case-insensitive character, but you probably want more