问题
This page usages
$ ghci -XNoMonomorphismRestriction
to start the haskell interpreter.
What does XNoMonomorphismRestriction switch mean?
回答1:
It turns off the Monomorphism restriction, which restricts values which are not defined using "function notation"¹ to have a non-polymorphic type.
¹ By "not using function notation" I mean that they're defined as foo = something and not foo bar = something, i.e. the definition does not contain explicit arguments.
来源：https://stackoverflow.com/questions/4575040/what-is-xnomonomorphismrestriction