Number return values

Number function return expects an arbitrary precision (generally over 64-bit, up to 512-bit) number value from function logic. Set values in function logic with the Go built-in *big.Float type or the framework number type.

Function Definition

Use the function.NumberReturn type in the function definition.

In this example, a function definition includes a number return:

func (f ExampleFunction) Definition(ctx context.Context, req function.DefinitionRequest, resp *function.DefinitionResponse) {
    resp.Definition = function.Definition{
        // ... other Definition fields ...
        Return: function.NumberReturn{
            // ... potentially other NumberReturn fields ...
        },
    }
}

Custom Types

You may want to build your own data value and type implementations to allow your provider to combine validation and other behaviors into a reusable bundle. This helps avoid duplication and ensures consistency. These implementations use the CustomType field in the return type.

Refer to Custom Types for further details on creating provider-defined types and values.

Documentation

Return documentation is expected in the top-level function documentation. Refer to function documentation for information about the Summary, Description, and MarkdownDescription fields available.

Setting Return Data

The function implementation documentation covers the general methods for setting function return data in function logic.

When setting the value for this return:

• If CustomType is set, use its associated value type.
• Otherwise, use the Go built-in *big.Float type or framework number type.

In this example, a function defines a number return and sets its value:

func (f ExampleFunction) Definition(ctx context.Context, req function.DefinitionRequest, resp *function.DefinitionResponse) {
    resp.Definition = function.Definition{
        // ... other Definition fields ...
        Return: function.NumberReturn{},
    }
}

func (f ExampleFunction) Run(ctx context.Context, req function.RunRequest, resp *function.RunResponse) {
    // ... other logic ...

    // hardcoded value for example brevity
    result := big.NewFloat(1.23)

    resp.Error = function.ConcatFuncErrors(resp.Error, resp.Result.Set(ctx, &result))
}