Re: (part 7) Han from China answers your C questions

[Nick Keighley]

this poster tends to post with low information content
but high abuse content.
On Nov 2, 6:30*am, Nomen Nescio <nob...@dizum.c omwrote:

lancer6...@yaho o.com said:

<snip>

[i] saw a function header defined as:

int Function(int value1, int value2, (int *A)(void *A1, int *A2, void
*A3), void *A3)

This specifies that parameter A is a pointer to a function

and the function is called by

Function(value1 , value2, A, A3);

'A' would be the name of a function. C automatically converts the name
into
a pointer to a function. The term used in the standard is "decays to
a
function pointer"

Is the "(int *A)(void *A1, int *A2, void *A3)" in the function header
equivalent to passing a function (A) to another function (Function)?

it specifies that the parameter is a function pointer

Practically speaking, yes. In CLC-talk, no. Numerous semanticists,
postmodernists,

<snip>

your word salad seems more PoM than anything else I've
seen recently on clc.

Something to think about: If "(int *A)(void *A1, int *A2, void *A3)"
were replaced by "int A[]", would an entire array be passed to
Function() or something else?

If so, how are the arguments to A passed into Function when Function
is called?

They're not, at least not in the sense you probably think.

ok. It is specified that the parameter is a pointer to a function.
The parameters aren't passed here. You needd to look at the call
to A that, presumably, appears in Function().

<snip nonsense>
--
Nick Keighley

[Barry Schwarz]

On Sun, 2 Nov 2008 06:15:20 -0800 (PST), Nick Keighley
<ni************ ******@hotmail. comwrote:

>this poster tends to post with low information content
but high abuse content.
On Nov 2, 6:30*am, Nomen Nescio <nob...@dizum.c omwrote:

>lancer6...@yah oo.com said:

<snip>

[i] saw a function header defined as:

int Function(int value1, int value2, (int *A)(void *A1, int *A2, void
*A3), void *A3)

This specifies that parameter A is a pointer to a function

and the function is called by

Function(value1 , value2, A, A3);

'A' would be the name of a function. C automatically converts the name
into
a pointer to a function. The term used in the standard is "decays to
a
function pointer"

Actually the word decay does not appear in the standard at all.
6.3.2.1-4 says "A function designator is an expression that has
function type. Except when it is the operand of the sizeof operator or
the unary & operator, a function designator with type ‘‘function
returning type’’ is converted to an expression that has type ‘‘pointer
to function returning type’’.
--
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