Haskell operator vs function precedence

by

Firstly, application (whitespace) is the highest precedence “operator”.

Secondly, in Haskell, there’s really no distinction between operators and functions, other than that operators are infix by default, while functions aren’t. You can convert functions to infix with backticks 

2 `f` x

and convert operators to prefix with parens:

(+) 2 3

So, your question is a bit confused.

Now, specific functions and operators will have declared precedence, which you can find in GHCi with “:info”:

Prelude> :info ($)
($) :: (a -> b) -> a -> b   -- Defined in GHC.Base

infixr 0 $

Prelude> :info (+)

class (Eq a, Show a) => Num a where
  (+) :: a -> a -> a

infixl 6 +

Showing both precedence and associativity.

More Related Contents:

  1. Non exhaustive pattern in function in GHCi
  2. How to compose `not` with a function of arbitrary arity?
  3. Uses for Haskell id function
  4. Does dart support operator overloading
  5. Table name as a PostgreSQL function parameter
  6. What is the difference between a ‘closure’ and a ‘lambda’?
  7. Define table and column names as arguments in a plpgsql function?
  8. What is the difference between a “function” and a “procedure”?
  9. How are Python in-place operator functions different than the standard operator functions?
  10. Is there a way to use two ‘…’ statements in a function in R?
  11. What decides if a value is returned from a PowerShell function?
  12. Haskell: Parse error in pattern
  13. How to alias a function name in Fortran
  14. Parenthesis Powershell functions
  15. How to profile methods in Scala?
  16. Return a list from the function using OUT parameter
  17. How to deal with name/value pairs of function arguments in MATLAB
  18. “Identifier Expected” or “Invalid Prototype” when implementing a scripted constant in Inno Setup
  19. Exporting a function in shell
  20. D3 Key Function
  21. Override a function that is imported in a namespace
  22. MsgBox “” vs MsgBox() in VBScript
  23. Scala Functional Literals with Implicits
  24. Return multiple values from a function in swift
  25. Why can’t ‘kotlin.Result’ be used as a return type?
  26. How to evaluate functions in GDB?
  27. MATLAB error: Undefined function or method X for input arguments of type ‘double’ [duplicate]
  28. Matlab ode45. How to change a parameter inside it while calling it?
  29. How do you strip the unit from any number in SASS?
  30. In R, what exactly is the problem with having variables with the same name as base R functions?

Leave a Comment