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DiaTagValue

  • Article

Describes the numeric value of a discriminated union's tag.

Syntax

struct DiaTagValue {
    BYTE value[16];
    BYTE valueSizeBytes;
};

Elements

Element Description
value The integer value stored in little-endian byte ordering.
valueSizeBytes The size in bytes of value. Must be one of 1, 2, 4, 8, 16 or 0 if this value is empty.

Remarks

A DiaTagValue can represent various values relating to discriminated or tagged unions, like Rust's enum variants.

An alternative way to think of a DiaTagValue could be something like this:

struct DiaTagValue {
    union {
        uint8_t data8;
        uint16_t data16;
        uint32_t data32;
        uint64_t data64;
        uint128_t data128;
    } value;
    uint8_t valueSizeBytes;
};

Requirements

Header: dia2.h

See also