Trait Dtype 

pub trait Dtype:
    Sealed
    + ConstrainedTypeShape
    + GroundedShape
    + IntoBindingValue
    + Default
    + Copy
    + 'static {
    const NAME: &'static str;
    const BLOCK_BYTES: usize;
    const BLOCK_ELEMS: usize;
}

Tensor element-type discipline.

A Dtype declares the canonical block layout of one tensor element (continuous types) or one quantization block (block-32 / block-256 quantized types). The trait is sealed per ADR-014; impls are confined to this module and reachable through TensorDtypeRegistry for container-format-realization enumeration per ADR-057.

Per ADR-017’s closure rule, two Dtype impls with identical BLOCK_BYTES content-address identically at the framework level. The Rust-type distinction is the application-level ergonomics surface (e.g., F16 vs BF16 are framework-equivalent 2-byte shapes but Rust-distinct dtypes carrying distinct floating-point interpretations at the container-format layer).

Required Associated Constants

const NAME: &'static str

Per-dtype name string (uppercase, GGML-convention spelling).

const BLOCK_BYTES: usize

Bytes per block. For continuous element types this is the element byte count; for quantized types this is the block-bytes count (= the GGML block_q*_* sizeof).

const BLOCK_ELEMS: usize

Elements per block. 1 for continuous types; 32 for legacy quantization; 256 for K-series quantization.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl Dtype for BF16

const NAME: &'static str = "BF16"

const BLOCK_BYTES: usize = F16_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for BOOL

const NAME: &'static str = "BOOL"

const BLOCK_BYTES: usize = BOOL_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for C64

const NAME: &'static str = "C64"

const BLOCK_BYTES: usize = C64_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for C128

const NAME: &'static str = "C128"

const BLOCK_BYTES: usize = C128_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for F4_E2M1

const NAME: &'static str = "F4_E2M1"

const BLOCK_BYTES: usize = PACKED_NIBBLE_BYTES

const BLOCK_ELEMS: usize = PACKED_NIBBLE_ELEMS

impl Dtype for F8_E4M3

const NAME: &'static str = "F8_E4M3"

const BLOCK_BYTES: usize = F8_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for F8_E4M3_FNUZ

const NAME: &'static str = "F8_E4M3_FNUZ"

const BLOCK_BYTES: usize = F8_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for F8_E5M2

const NAME: &'static str = "F8_E5M2"

const BLOCK_BYTES: usize = F8_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for F8_E5M2_FNUZ

const NAME: &'static str = "F8_E5M2_FNUZ"

const BLOCK_BYTES: usize = F8_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for F16

const NAME: &'static str = "F16"

const BLOCK_BYTES: usize = F16_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for F32

const NAME: &'static str = "F32"

const BLOCK_BYTES: usize = F32_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for F64

const NAME: &'static str = "F64"

const BLOCK_BYTES: usize = F64_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for I4

const NAME: &'static str = "I4"

const BLOCK_BYTES: usize = PACKED_NIBBLE_BYTES

const BLOCK_ELEMS: usize = PACKED_NIBBLE_ELEMS

impl Dtype for I8

const NAME: &'static str = "I8"

const BLOCK_BYTES: usize = INT8_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for I16

const NAME: &'static str = "I16"

const BLOCK_BYTES: usize = INT16_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for I32

const NAME: &'static str = "I32"

const BLOCK_BYTES: usize = INT32_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for I64

const NAME: &'static str = "I64"

const BLOCK_BYTES: usize = INT64_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for IQ1_M

const NAME: &'static str = "IQ1_M"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for IQ1_S

const NAME: &'static str = "IQ1_S"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for IQ2_S

const NAME: &'static str = "IQ2_S"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for IQ2_XS

const NAME: &'static str = "IQ2_XS"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for IQ2_XXS

const NAME: &'static str = "IQ2_XXS"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for IQ3_S

const NAME: &'static str = "IQ3_S"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for IQ3_XXS

const NAME: &'static str = "IQ3_XXS"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for IQ4_NL

const NAME: &'static str = "IQ4_NL"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK4_NL

impl Dtype for IQ4_XS

const NAME: &'static str = "IQ4_XS"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for Q2_K

const NAME: &'static str = "Q2_K"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for Q3_K

const NAME: &'static str = "Q3_K"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for Q4_0

const NAME: &'static str = "Q4_0"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK4_0

impl Dtype for Q4_1

const NAME: &'static str = "Q4_1"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK4_0

impl Dtype for Q4_K

const NAME: &'static str = "Q4_K"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for Q5_0

const NAME: &'static str = "Q5_0"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK5_0

impl Dtype for Q5_1

const NAME: &'static str = "Q5_1"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK5_0

impl Dtype for Q5_K

const NAME: &'static str = "Q5_K"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for Q6_K

const NAME: &'static str = "Q6_K"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for Q8_0

const NAME: &'static str = "Q8_0"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK8_0

impl Dtype for Q8_1

const NAME: &'static str = "Q8_1"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK8_0

impl Dtype for Q8_K

const NAME: &'static str = "Q8_K"

const BLOCK_BYTES: usize

const BLOCK_ELEMS: usize = QK_K

impl Dtype for U4

const NAME: &'static str = "U4"

const BLOCK_BYTES: usize = PACKED_NIBBLE_BYTES

const BLOCK_ELEMS: usize = PACKED_NIBBLE_ELEMS

impl Dtype for U8

const NAME: &'static str = "U8"

const BLOCK_BYTES: usize = INT8_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for U16

const NAME: &'static str = "U16"

const BLOCK_BYTES: usize = INT16_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for U32

const NAME: &'static str = "U32"

const BLOCK_BYTES: usize = INT32_BYTES

const BLOCK_ELEMS: usize = 1

impl Dtype for U64

const NAME: &'static str = "U64"

const BLOCK_BYTES: usize = INT64_BYTES

const BLOCK_ELEMS: usize = 1