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31349a9c3a
This is part of a general effort to move all of Terraform's non-library package surface under internal in order to reinforce that these are for internal use within Terraform only. If you were previously importing packages under this prefix into an external codebase, you could pin to an earlier release tag as an interim solution until you've make a plan to achieve the same functionality some other way.
63 lines
1.9 KiB
Go
63 lines
1.9 KiB
Go
package configschema
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import (
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"github.com/zclconf/go-cty/cty"
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)
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// EmptyValue returns the "empty value" for the recieving block, which for
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// a block type is a non-null object where all of the attribute values are
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// the empty values of the block's attributes and nested block types.
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//
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// In other words, it returns the value that would be returned if an empty
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// block were decoded against the recieving schema, assuming that no required
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// attribute or block constraints were honored.
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func (b *Block) EmptyValue() cty.Value {
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vals := make(map[string]cty.Value)
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for name, attrS := range b.Attributes {
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vals[name] = attrS.EmptyValue()
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}
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for name, blockS := range b.BlockTypes {
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vals[name] = blockS.EmptyValue()
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}
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return cty.ObjectVal(vals)
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}
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// EmptyValue returns the "empty value" for the receiving attribute, which is
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// the value that would be returned if there were no definition of the attribute
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// at all, ignoring any required constraint.
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func (a *Attribute) EmptyValue() cty.Value {
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if a.NestedType != nil {
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return cty.NullVal(a.NestedType.ImpliedType())
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}
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return cty.NullVal(a.Type)
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}
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// EmptyValue returns the "empty value" for when there are zero nested blocks
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// present of the receiving type.
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func (b *NestedBlock) EmptyValue() cty.Value {
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switch b.Nesting {
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case NestingSingle:
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return cty.NullVal(b.Block.ImpliedType())
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case NestingGroup:
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return b.Block.EmptyValue()
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case NestingList:
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if ty := b.Block.ImpliedType(); ty.HasDynamicTypes() {
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return cty.EmptyTupleVal
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} else {
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return cty.ListValEmpty(ty)
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}
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case NestingMap:
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if ty := b.Block.ImpliedType(); ty.HasDynamicTypes() {
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return cty.EmptyObjectVal
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} else {
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return cty.MapValEmpty(ty)
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}
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case NestingSet:
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return cty.SetValEmpty(b.Block.ImpliedType())
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default:
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// Should never get here because the above is intended to be exhaustive,
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// but we'll be robust and return a result nonetheless.
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return cty.NullVal(cty.DynamicPseudoType)
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}
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}
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