9 Declarations [dcl]

9.3 Declarators [dcl.decl]

9.3.2 Type names [dcl.name]

1
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To specify type conversions explicitly, and as an argument of sizeof, alignof, new, or typeid, the name of a type shall be specified.
This can be done with a type-id or new-type-id ([expr.new]), which is syntactically a declaration for a variable or function of that type that omits the name of the entity.
It is possible to identify uniquely the location in the abstract-declarator where the identifier would appear if the construction were a declarator in a declaration.
The named type is then the same as the type of the hypothetical identifier.
[Example 1 : 
int // int i int * // int *pi int *[3] // int *p[3] int (*)[3] // int (*p3i)[3] int *() // int *f() int (*)(double) // int (*pf)(double) name respectively the types "int", "pointer to int", "array of 3 pointers to int", "pointer to array of 3 int", "function of (no parameters) returning pointer to int", and "pointer to a function of (double) returning int".
— end example]
2
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[Note 1 : 
A type can also be named by a typedef-name, which is introduced by a typedef declaration or alias-declaration ([dcl.typedef]).
— end note]

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