# portableKernelArgument

A portable kernel argument record carrying name, role, dtype, rank, isMutable, and related state.

Last updated: 2026-09-09

Package: compute.kernels | Status: source-declared

Tags: compute, compute.kernels, cpu, kernels, method, source-example, thing, yeho

Describe reusable compute kernels and their workload contracts.

```yh
external thing portableKernelArgument
```

- text name: Stores name as text.
- text role: Stores role as text.
- text dtype: Stores dtype as text.
- int rank: Stores rank as int.
- bool isMutable: Stores is mutable as bool.
- text aliasPolicy: Stores alias policy as text.
- portableKernelArgument(text name, text role, text dtype, int rank, bool isMutable, text aliasPolicy): Portable kernel argument.
- ValidationIssue() returns text: Validation issue.
- Describe() returns text: Describe.

## Use portableKernelArgument

A complete small caller. Values are illustrative; check the returned result and package requirements before connecting live resources.

Verification: type checked

```yh
using compute.kernels

// Describe reusable compute kernels and their workload contracts.
portableKernelArgument sample = portableKernelArgument("Nova", "role", "int", 1, true, "alias Policy")
Console.Log(Text.From(sample.name))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.compute_kernels__portablekernelargument"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "compute.kernels"
version = "0.1.0"
path = "../../../yeho/packages/compute/kernels"

[[dependencies]]
package = "compute.tensor"
version = "0.1.0"
path = "../../../yeho/packages/compute/tensor"

[[dependencies]]
package = "console"
version = "0.1.0"
path = "../../../yeho/packages/console"

[[dependencies]]
package = "diagnostics"
version = "0.1.0"
path = "../../../yeho/packages/diagnostics"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/compute.kernels--portableKernelArgument/usage --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


## portableKernelArgument.ValidationIssue

A complete caller for this public method. Sample inputs are illustrative; native resources require their owning lifecycle.

Verification: type checked

```yh
using compute.kernels

// Validation issue.
portableKernelArgument instance = portableKernelArgument("Nova", "role", "int", 1, true, "alias Policy")
text result = instance.ValidationIssue()
Console.Log(Text.From(result))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.compute_kernels__portablekernelargument"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "compute.kernels"
version = "0.1.0"
path = "../../../yeho/packages/compute/kernels"

[[dependencies]]
package = "compute.tensor"
version = "0.1.0"
path = "../../../yeho/packages/compute/tensor"

[[dependencies]]
package = "console"
version = "0.1.0"
path = "../../../yeho/packages/console"

[[dependencies]]
package = "diagnostics"
version = "0.1.0"
path = "../../../yeho/packages/diagnostics"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/compute.kernels--portableKernelArgument/method-ValidationIssue-7 --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


## portableKernelArgument.Describe

A complete caller for this public method. Sample inputs are illustrative; native resources require their owning lifecycle.

Verification: type checked

```yh
using compute.kernels

// Describe.
portableKernelArgument instance = portableKernelArgument("Nova", "role", "int", 1, true, "alias Policy")
text result = instance.Describe()
Console.Log(Text.From(result))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.compute_kernels__portablekernelargument"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "compute.kernels"
version = "0.1.0"
path = "../../../yeho/packages/compute/kernels"

[[dependencies]]
package = "compute.tensor"
version = "0.1.0"
path = "../../../yeho/packages/compute/tensor"

[[dependencies]]
package = "console"
version = "0.1.0"
path = "../../../yeho/packages/console"

[[dependencies]]
package = "diagnostics"
version = "0.1.0"
path = "../../../yeho/packages/diagnostics"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/compute.kernels--portableKernelArgument/method-Describe-8 --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


Package presence and a declaration do not establish support on every host. Host services need their platform and lifecycle setup.

Source: yeho/packages/compute/kernels/portable_contract.yh

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