typeof operators (since C23)
Determines the type of an object.
Syntax
typeof( type ) |
(1) | |
typeof( expression ) |
(2) | |
typeof_unqual( type ) |
(3) | |
typeof_unqual( expression ) |
(4) |
Explanation
1) produces the type-name with any nested typeof-specifier evaluated
2) 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
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.
Example
References
- C23 standard (ISO/IEC 9899:2023):
- 6.7.2.5 The typeof specifiers (p: 115-118)
See also
C++ documentation for decltype |
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