6.26. Compound Literals
6.26 Compound Literals
ISO C99 supports compound literals. A compound literal looks like a cast containing an initializer. Its value is an object of the type specified in the cast, containing the elements specified in the initializer; it is an lvalue. As an extension, GCC supports compound literals in C90 mode and in C++, though the semantics are somewhat different in C++.
Usually, the specified type is a structure. Assume that struct foo
and structure
are declared as shown:
struct foo {int a; char b[2];} structure;
Here is an example of constructing a struct foo
with a compound literal:
structure = ((struct foo) {x + y, 'a', 0});
This is equivalent to writing the following:
{ struct foo temp = {x + y, 'a', 0}; structure = temp; }
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