Changes between Version 4 and Version 5 of const

Timestamp:

May 13, 2010, 4:57:49 PM (15 years ago)

Author:

andersk@mit.edu

Comment:

Try to clarify the table by distinguishing between “changing” a char and “repointing” a pointer.

const

@@ -4 +4 @@
 
 ||`const int x;`[[br]]`int const x;`||The value of the `int` cannot be changed.||
-||`const int *p;`[[br]]`int const *p;`||The value of the `int` cannot be changed through this pointer.||
-||`int *const p;`||The value of the pointer cannot be changed.||
-||`const int *const p;`||The value of the pointer cannot be changed, and the value of the `int` cannot be changed through this pointer.||
+||`const int *p;`[[br]]`int const *p;`||The value of the `int` cannot be changed through this pointer (`*p = n` is disallowed).||
+||`int *const p;`||The pointer cannot be repointed (`p = q` is disallowed).||
+||`const int *const p;`||The pointer cannot be repointed, and the value of the `int` cannot be changed through this pointer.||
 ||`const int a[3];`||The values of the `int`s in the array cannot be changed.||
 ||`const char **pp;`||The `char` pointed to by `*pp` cannot be changed through it.||
-||`char *const *pp;`||The `char *` pointed to by `pp` cannot be changed through it.||
-||`char **const pp;`||`pp` cannot be changed.||
-||`const char *const *pp;`||The `char *` cannot be changed through `pp`, and the `char` cannot be changed through `*pp`.||
+||`char *const *pp;`||The `char *` pointed to by `pp` cannot be repointed through it.||
+||`char **const pp;`||`pp` cannot be repointed.||
+||`const char *const *pp;`||The `const char *` cannot be repointed through `pp`, and the `char` cannot be changed through `*pp`.||
 ||`const char *const *const pp;`||All of the above.||