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| Epsilon User's Manual and Reference |
| Epsilon Extension Language |
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| Scope of Variables |
| Data Types |
| Declarations |
| Simple Declarators |
| Pointer Declarators |
| Array Declarators |
| Function Declarators |
| . . . |
| Initialization |
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Epsilon User's Manual and Reference > Epsilon Extension Language > Data Types >
Pointer Declarators
Pointer declarators are used in conjunction with type specifiers to declare variables of type pointer to t, where t is some type. The form of a pointer declarator is
* declarator
Suppose T is a type specifier and D is a declarator, and the
declaration "T D;" declares the identifier embedded in D
to be of type "... T". Then the declaration T *D; declares
the identifier in D to be of type "... pointer to T".
Several examples illustrate the concept.
int l;
int *lptr;
int **ldblptr;
Clearly, the first declaration declares l to be of type int. The
type specifier is int and the declarator is l.
The second line is a little more complicated. The type specifier is
still int, but the declarator is *lptr. Using the
rule above, we see that lptr is a pointer to an int. This
is immediately clear from the above if you substitute "int" for T,
and "lptr" for D.
Similarly, the third line declares ldblptr to be a pointer to a pointer
to an int.
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