tmp/tmpnn7gem7q/{from.md → to.md}
RENAMED
|
@@ -81,16 +81,16 @@ macro. The individual arguments within the list are separated by comma
|
|
| 81 |
preprocessing tokens, but comma preprocessing tokens between matching
|
| 82 |
inner parentheses do not separate arguments. If there are sequences of
|
| 83 |
preprocessing tokens within the list of arguments that would otherwise
|
| 84 |
act as preprocessing directives,[^10] the behavior is undefined.
|
| 85 |
|
| 86 |
-
If there is a `...`
|
| 87 |
-
the trailing arguments, including any separating
|
| 88 |
-
tokens, are merged to form a single item: the
|
| 89 |
-
number of arguments so combined is such that,
|
| 90 |
-
number of arguments is one more than the number of
|
| 91 |
-
macro definition (excluding the `...`).
|
| 92 |
|
| 93 |
### Argument substitution <a id="cpp.subst">[[cpp.subst]]</a>
|
| 94 |
|
| 95 |
After the arguments for the invocation of a function-like macro have
|
| 96 |
been identified, argument substitution takes place. A parameter in the
|
|
@@ -249,11 +249,11 @@ To illustrate the rules for redefinition and reexamination, the sequence
|
|
| 249 |
#define f(a) f(x * (a))
|
| 250 |
#undef x
|
| 251 |
#define x 2
|
| 252 |
#define g f
|
| 253 |
#define z z[0]
|
| 254 |
-
#define h g(
|
| 255 |
#define m(a) a(w)
|
| 256 |
#define w 0,1
|
| 257 |
#define t(a) a
|
| 258 |
#define p() int
|
| 259 |
#define q(x) x
|
|
@@ -269,11 +269,11 @@ char c[2][6] = { str(hello), str() };
|
|
| 269 |
|
| 270 |
results in
|
| 271 |
|
| 272 |
``` cpp
|
| 273 |
f(2 * (y+1)) + f(2 * (f(2 * (z[0])))) % f(2 * (0)) + t(1);
|
| 274 |
-
f(2 * (2+(3,4)-0,1)) | f(2 * (
|
| 275 |
int i[] = { 1, 23, 4, 5, };
|
| 276 |
char c[2][6] = { "hello", "" };
|
| 277 |
```
|
| 278 |
|
| 279 |
To illustrate the rules for creating character string literals and
|
|
|
|
| 81 |
preprocessing tokens, but comma preprocessing tokens between matching
|
| 82 |
inner parentheses do not separate arguments. If there are sequences of
|
| 83 |
preprocessing tokens within the list of arguments that would otherwise
|
| 84 |
act as preprocessing directives,[^10] the behavior is undefined.
|
| 85 |
|
| 86 |
+
If there is a `...` immediately preceding the `)` in the function-like
|
| 87 |
+
macro definition, then the trailing arguments, including any separating
|
| 88 |
+
comma preprocessing tokens, are merged to form a single item: the
|
| 89 |
+
*variable arguments*. The number of arguments so combined is such that,
|
| 90 |
+
following merger, the number of arguments is one more than the number of
|
| 91 |
+
parameters in the macro definition (excluding the `...`).
|
| 92 |
|
| 93 |
### Argument substitution <a id="cpp.subst">[[cpp.subst]]</a>
|
| 94 |
|
| 95 |
After the arguments for the invocation of a function-like macro have
|
| 96 |
been identified, argument substitution takes place. A parameter in the
|
|
|
|
| 249 |
#define f(a) f(x * (a))
|
| 250 |
#undef x
|
| 251 |
#define x 2
|
| 252 |
#define g f
|
| 253 |
#define z z[0]
|
| 254 |
+
#define h g(~
|
| 255 |
#define m(a) a(w)
|
| 256 |
#define w 0,1
|
| 257 |
#define t(a) a
|
| 258 |
#define p() int
|
| 259 |
#define q(x) x
|
|
|
|
| 269 |
|
| 270 |
results in
|
| 271 |
|
| 272 |
``` cpp
|
| 273 |
f(2 * (y+1)) + f(2 * (f(2 * (z[0])))) % f(2 * (0)) + t(1);
|
| 274 |
+
f(2 * (2+(3,4)-0,1)) | f(2 * (~ 5)) & f(2 * (0,1))^m(0,1);
|
| 275 |
int i[] = { 1, 23, 4, 5, };
|
| 276 |
char c[2][6] = { "hello", "" };
|
| 277 |
```
|
| 278 |
|
| 279 |
To illustrate the rules for creating character string literals and
|