burst.Functional Class Reference

List of all members.

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Detailed Description

Scoping class to hold static functions for functional programming.

These are mostly inspired by the C++ function templates in the C++ standard library (include "functional"). That might seem an odd place to start, but the well-known FP languages such as Haskell do too much as part of the language to be a good starting point (for example, there is no explicit "curry" function in Haskell, because the language itself does it).

Static Public Member Functions
UnaryOp	bind1st (BinaryOp binary_op, Object arg1)
	return a unary function given a binary function and the first argument.
UnaryOp	bind2nd (BinaryOp binary_op, Object arg2)
	return a unary function given a binary function and the second argument.
Function	bind (func, arg1,...)
	Return a function with the supplied arguments bound.
UnaryPred	not1 (UnaryPred unary_pred)
	Return a unary predicate which reverses the sense of the provided unary predicate.
BinaryPred	not2 (BinaryPred binary_pred)
	Return a binary predicate which reverses the sense of the provided binary predicate.
ZeroaryOp	mem_fun0 (ZeroAryMemberFunction mem_func)
	Return a function which will bind 'this' to the object in its single argument, and call the provided member function.
UnaryOp	mem_fun1 (UnAryMemberFunction mem_func)
	Return a function which will bind 'this' to the object in its first argument, and call the provided member function with its second argument.
Function	mem_fn (MemberFunction mem_func)
	Like mem_fun but works with any number of arguments.
UnaryOp	compose_f_gx (UnaryOp f, UnaryOp g)
	For compose operations, we use the boost naming convention:.
UnaryOp	compose_f_gx_hx (BinaryOp f, UnaryOp g, UnaryOp h)
	f(g(value),h(value))
BinaryOp	compose_f_gx_hy (BinaryOp f, UnaryOp g, UnaryOp h)
	f(g(value1),h(value2))
BinaryOp	compose_f_gxy (UnaryOp f, BinaryOp g)
	f(g(value1,value2))
ZeroaryOp	compose_f_g (ZeroaryOp f, ZeroaryOp g)
	f(g())
Function	compose (UnaryOp f, Function g)
	Generic compose.
Function	compose_sort (BinaryOp secondary, BinaryOp primary)
	compose two sort comparators.

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Member Function Documentation

Function burst.Functional.bind (  func  , arg1  , ...  )  [static]

Return a function with the supplied arguments bound. The variable args supplied are matched positionally to the parameters of the supplied function. The caller can pass in one of the constants burst.Functional._1, burst.Functional._2, etc. to indicate that the function func should be called with the first, second, etc. argument of the returned function. For example:burst.Functional.bind(op, burst.Functional._2, burst.Functional._1, 17) returns a binary function f(x,y) which will call op(y,x,17). See http://www.boost.org/libs/bind/bind.html Todo: finish implementation of bind

Function burst.Functional.compose (  UnaryOp  f, Function  g )  [static]

Generic compose. The returned function calls f(g(...)). The function f is unary. The returned function and g take the same number of arguments.

UnaryOp burst.Functional.compose_f_gx (  UnaryOp  f, UnaryOp  g )  [static]

For compose operations, we use the boost naming convention:. f(g(value)) compose_f_gx C++ compose1 f(g(value),h(value)) compose_f_gx_hx C++ compose2 f(g(value1),h(value2)) compose_f_gx_hy f(g(value1,value2)) compose_f_gxy f(g()) compose_f_g See http://www.josuttis.com/cppcode/compose.html

Function burst.Functional.compose_sort (  BinaryOp  secondary, BinaryOp  primary )  [static]

compose two sort comparators. The secondary is applied only if the primary returns 0.

Function burst.Functional.mem_fn (  MemberFunction  mem_func  )  [static]

Like mem_fun but works with any number of arguments. See http://www.boost.org/libs/bind/mem_fn.html Todo: finish implementation of mem_fn

ZeroaryOp burst.Functional.mem_fun0 (  ZeroAryMemberFunction  mem_func  )  [static]

Return a function which will bind 'this' to the object in its single argument, and call the provided member function. An example might be burst.Functional.mem_fun0(Person.prototype.kill)(myperson).

UnaryOp burst.Functional.mem_fun1 (  UnAryMemberFunction  mem_func  )  [static]

Return a function which will bind 'this' to the object in its first argument, and call the provided member function with its second argument. An example might be burst.Functional.mem_fun1(Person.prototype.setManager)(myperson, mgr). (Note that the C++ mem_fun function template will work with zeroary or unary functions. Unless the function counts its arguments, mem_fun1 could be used as mem_fun.)

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The documentation for this class was generated from the following file:

• Functional.java

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