typeof operators (since C23) - cppreference.com (original) (raw)
Determines the type of an object.
[edit] Syntax
| | | | | ------------------------------------ | --- | | | typeof( type ) | (1) | | | | | | | typeof( expression ) | (2) | | | | | | | typeof_unqual( type ) | (3) | | | | | | | typeof_unqual( expression ) | (4) | | | | | |
[edit] Explanation
produces the type-name with any nested typeof-specifier evaluated
yields the type-name representing the type of its operand. No implicit conversions are applied to expression.
3,4) the same as (1) and (2) respectively but remove qualifiers
[edit] Notes
typeof and typeof_unqual are collectively called the typeof operators. The typeof operators cannot be applied to bit-field members. If the type of the operand is a variably modified type, the operand is evaluated; otherwise, the operand is not evaluated. The result of the typeof_unqual operator is the non-atomic unqualified type that would result from the typeof operator. The typeof operator preserves all qualifiers.
[edit] Example
[edit] References
C23 standard (ISO/IEC 9899:2024):
6.7.2.5 The typeof specifiers (p: 115-118)