51 lines
2.1 KiB
Go
51 lines
2.1 KiB
Go
package function
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import (
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"github.com/zclconf/go-cty/cty"
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)
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// Parameter represents a parameter to a function.
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type Parameter struct {
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// Name is an optional name for the argument. This package ignores this
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// value, but callers may use it for documentation, etc.
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Name string
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// A type that any argument for this parameter must conform to.
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// cty.DynamicPseudoType can be used, either at top-level or nested
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// in a parameterized type, to indicate that any type should be
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// permitted, to allow the definition of type-generic functions.
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Type cty.Type
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// If AllowNull is set then null values may be passed into this
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// argument's slot in both the type-check function and the implementation
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// function. If not set, such values are rejected by the built-in
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// checking rules.
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AllowNull bool
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// If AllowUnknown is set then unknown values may be passed into this
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// argument's slot in the implementation function. If not set, any
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// unknown values will cause the function to immediately return
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// an unkonwn value without calling the implementation function, thus
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// freeing the function implementer from dealing with this case.
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AllowUnknown bool
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// If AllowDynamicType is set then DynamicVal may be passed into this
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// argument's slot in the implementation function. If not set, any
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// dynamic values will cause the function to immediately return
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// DynamicVal value without calling the implementation function, thus
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// freeing the function implementer from dealing with this case.
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//
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// Note that DynamicVal is also unknown, so in order to receive dynamic
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// *values* it is also necessary to set AllowUnknown.
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//
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// However, it is valid to set AllowDynamicType without AllowUnknown, in
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// which case a dynamic value may be passed to the type checking function
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// but will not make it to the *implementation* function. Instead, an
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// unknown value of the type returned by the type-check function will be
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// returned. This is suggested for functions that have a static return
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// type since it allows the return value to be typed even if the input
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// values are not, thus improving the type-check accuracy of derived
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// values.
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AllowDynamicType bool
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}
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