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35 lines
1005 B
Go
35 lines
1005 B
Go
package cty
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import (
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"errors"
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)
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type collectionTypeImpl interface {
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ElementType() Type
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}
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// IsCollectionType returns true if the given type supports the operations
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// that are defined for all collection types.
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func (t Type) IsCollectionType() bool {
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_, ok := t.typeImpl.(collectionTypeImpl)
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return ok
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}
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// ElementType returns the element type of the receiver if it is a collection
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// type, or panics if it is not. Use IsCollectionType first to test whether
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// this method will succeed.
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func (t Type) ElementType() Type {
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if ct, ok := t.typeImpl.(collectionTypeImpl); ok {
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return ct.ElementType()
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}
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panic(errors.New("not a collection type"))
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}
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// ElementCallback is a callback type used for iterating over elements of
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// collections and attributes of objects.
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//
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// The types of key and value depend on what type is being iterated over.
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// Return true to stop iterating after the current element, or false to
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// continue iterating.
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type ElementCallback func(key Value, val Value) (stop bool)
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