69 lines
1.5 KiB
Go
69 lines
1.5 KiB
Go
package cty
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import (
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"fmt"
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)
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// TypeList instances represent specific list types. Each distinct ElementType
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// creates a distinct, non-equal list type.
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type typeMap struct {
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typeImplSigil
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ElementTypeT Type
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}
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// Map creates a map type with the given element Type.
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//
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// Map types are CollectionType implementations.
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func Map(elem Type) Type {
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return Type{
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typeMap{
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ElementTypeT: elem,
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},
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}
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}
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// Equals returns true if the other Type is a map whose element type is
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// equal to that of the receiver.
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func (t typeMap) Equals(other Type) bool {
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ot, isMap := other.typeImpl.(typeMap)
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if !isMap {
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return false
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}
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return t.ElementTypeT.Equals(ot.ElementTypeT)
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}
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func (t typeMap) FriendlyName() string {
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return "map of " + t.ElementTypeT.FriendlyName()
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}
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func (t typeMap) ElementType() Type {
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return t.ElementTypeT
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}
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func (t typeMap) GoString() string {
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return fmt.Sprintf("cty.Map(%#v)", t.ElementTypeT)
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}
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// IsMapType returns true if the given type is a list type, regardless of its
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// element type.
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func (t Type) IsMapType() bool {
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_, ok := t.typeImpl.(typeMap)
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return ok
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}
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// MapElementType is a convenience method that checks if the given type is
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// a map type, returning a pointer to its element type if so and nil
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// otherwise. This is intended to allow convenient conditional branches,
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// like so:
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//
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// if et := t.MapElementType(); et != nil {
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// // Do something with *et
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// }
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func (t Type) MapElementType() *Type {
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if lt, ok := t.typeImpl.(typeMap); ok {
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return <.ElementTypeT
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}
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return nil
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}
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