Reserved Data Types
Reserved Data Types
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Reserved Data Types Built-in reserved Data Types.

## Description

The data type names described in the table below are reserved and cannot be used by applications as user-defined type names. The vector data type names defined in Vector Data Types, but where `n` is any value other than 2, 3, 4, 8 and 16, are also reserved.

Type | Description
--- | ---
booln | A boolean vector.
halfn | A 16-bit float vector.
quad, quadn | A 128-bit floating-point number and vectors.
    complex half,
    complex halfn,
    imaginary half,
    imaginary halfn
| Complex and imaginary 16-bit floating-point scalar and vector.
    complex float,
    complex floatn,
    imaginary float,
    imaginary floatn
| Complex and imaginary 32-bit floating-point scalar and vector.
    complex double,
    complex doublen,
    imaginary double,
    imaginary doublen
| Complex and imaginary 64-bit floating-point scalar and vector.
    complex quad,
    complex quadn,
    imaginary quad,
    imaginary quadn
| Complex and imaginary 128-bit floating-point scalar and vector.
floatnxm | An n x m matrix of single precision floating-point values stored in column-major order.
doublenxm | An n x m matrix of double precision floating-point values stored in column-major order.
    long double,
    long doublen
| A floating-point scalar and vector type with at long doublen least as much precision and range as a double and no more precision and range than a quad.
long long, long longn | A 128-bit signed integer scalar and vector.
unsigned long long, ulong long, ulong longn | A 128-bit unsigned integer scalar and vector.

## Specification

OpenCL Specification

## Also see

Macros and Limits, Scalar Data Types, Vector Data Types, Other Data Types, Abstract Data Types, Enumerated Data Types,

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