c++ macros with memory?

Question

Is it possible to define macros

write_foo(A);
and
read_foo();

so that:

WRITE_FOO(hello);

code_block_1;

READ_FOO();

code         


        

Answer 1

this is the sweet spot for tools like Cog that approach the problem of code generation from an intuitive programming approach using python. This is what would look like your code using it

/*[[[cog
# definitions ----
import cog
Foo = ''
def WriteFoo( value ):
    Foo = value

def ReadFoo():
    cog.outl(' %s; ' % Foo)

# generation ---
WriteFoo( 'hello' )
]]]*/
//[[[end]]]

some_code_block;

/*[[[cog 
ReadFoo() ]]]*/
hello;
//[[[end]]]

some_other_blocK;

/*[[[cog 
WriteFoo( 'world')
ReadFoo() ]]]*/
world;
//[[[end]]]


last_block;