What should be added to C
aglew at ccvaxa.UUCP
aglew at ccvaxa.UUCP
Thu May 29 05:01:00 AEST 1986
~> Things that should/could be added to C, or C++, or...
typeof
typeof would be a compile time operator that would
have a (possibly compressed and tokenized) form of
the type used in declaring its argument (a variable)
inserted in its place.
If the C preprocessor ever gets sophisticated enough
to be a true macro processor, typeof should return a
string that macro operations can parse and disassemble
as they will. In particular, typeof(typedef-name)
should return the type used in declaring the type-name,
and so on.
lambda
Wherever you may have a variable, it should be possible
to substitute a literal constant of the appropriate type.
C fails this test for arrays, which hasn't been so serious
for the applications I've seen (I don't like having to declare
COMPLEX constants as initialized variables, but C has so many
other weaknesses for constants that I don't care - I'll wait
for C++ constructors) -- more importantly, C also fails this
test for function-pointers.
When I pass a function pointer to, say, an integration routine,
I would like to not have to go to the bottom of the file
somewhere and write the function. f it's a short, anonymous
function that I'm not going to use anywhere else, I want to
declare it in place.
I've used preprocessors that let you do this:
integrate(from,to,
float lambda(x) float x; {return x*x;}
)
and move the declaration to the end and create a special name
for it.
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