Joel de Guzman <joel@boost-consulting.com> writes:
Comments, feedback very welcome!
Supported operators
Style tip: every section should have some introductory text before its first subsection. Every subsection should have at least one sibling.
Unary operators
prefix: ~, !, -, +, ++, --, & (reference), * (dereference) postfix: ++, --
Binary operators
=, [], +=, -=, *=, /=, %=, &=, |=, ^=, <<=, >>= +, -, *, /, %, &, |, ^, <<, >> ==, !=, <, >, <=, >= &&, ||, ->*
Ternary operator
if_else(c, a, b)
The ternary operator deserves special mention. Since C++ does not allow us to overload the conditional expression: c ? a : b, the if_else pseudo function is provided for this purpose. The behavior is identical, albeit in a lazy manner.
Does it deserve special support? Why not just use if_(c)[a].else[b] ?
Member pointer operator
a->*member_object_pointer a->*member_function_pointer
The left hand side of the member pointer operator must be an actor returning a pointer type. The right hand side of the member pointer operator may be either a pointer to member object or pointer to member function.
If the right hand side is a member object pointer, the result is a composite providing lazy access to that member.
"an actor that, when invoked, returns a reference to that member."
For example:
struct A { int member; };
A* a = new A; ...
(arg1->*&A::member)(a); // returns member a->member
If the right hand side is a member function pointer, the result is a delayed function call. The arguments to this call are then bound to the returned composite.
The wording is confusing. "Delayed function call" has not been defined. Why not just say that "the result is an actor that, when invoked, calls the specified member function?" Is that inaccurate? -- Dave Abrahams Boost Consulting www.boost-consulting.com