intptrt

intptrt is not a standard type; it is typically a misspelling of intptr_t, the signed integer type defined in the C standard library and available in C++ as well. intptr_t is designed to be able to hold any pointer value without loss of information, making it useful for low-level interfacing between pointers and integers.

In C, intptr_t is defined in stdint.h, and in C++ it is available through <cstdint>. The existence of intptr_t is implementation-defined: some platforms provide it when the implementation can represent all pointer values as an integer, while others may not. When present, intptr_t has the same width as a pointer on that platform (for example, 32 bits on many 32-bit systems and 64 bits on many 64-bit systems). The corresponding unsigned type is uintptr_t.

Two related macros accompany intptr_t: INTPTR_MIN and INTPTR_MAX, which specify the minimum and maximum values of the type. There is also uintptr_t with its own macro, UINTPTR_MAX. These enable portable limits for pointer-sized integers.

Common uses of intptr_t include converting pointers to integers for hashing, performing pointer-sized arithmetic in contexts that require integer operations, and implementing tagged pointers. However, portability cautions apply: arithmetic and comparisons should be performed with the appropriate types, and conversions should be explicit and well-defined to avoid undefined behavior or lossy results when pointers are not representable as integers.

If you encounter the name intptrt in code, it is generally prudent to treat it as a typo for intptr_t or to verify it against the project’s type definitions, since intptrt is not part of the standard types.