On 13 August 2011 17:34, Patrick Browne
The :info command is a great help. Why does :info g 4 produce a parse error, while :t g 4 does not?
From :help in ghci:
:info [<name> ...] display information about the given names By "names", it's referring to existing definitions, either in imported modules or defined within ghci using let, e.g.: Prelude> let foo = "foo" Prelude> :i foo foo :: [Char] -- Defined at <interactive>:1:5-7 So, ":info g" would work; as would ":info g T" (by getting the info of both g and T _separately_).. But ":info g 4" doesn't because of the _4_, as it is a literal value, not a name of a value. This also happens with literal Strings, etc. Doing ":t g 4" tells ghci to determine the type of the expression "(g 4)". Note that even if you did ":info g T" it will _not_ give you the info of the expression "(g T)". -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com