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anchors.go
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/
anchors.go
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package decode
import (
"github.com/KSpaceer/yamly/engines/yayamls/ast"
)
type anchorsKeeper struct {
anchors map[string]ast.Node
metAnchor bool
anchorName string
}
func newAnchorsKeeper() anchorsKeeper {
return anchorsKeeper{
anchors: map[string]ast.Node{},
}
}
func (ak *anchorsKeeper) StoreAnchor(anchorName string) {
ak.metAnchor = true
ak.anchorName = anchorName
}
func (ak *anchorsKeeper) BindToLatestAnchor(n ast.Node) {
if ak.metAnchor {
ak.anchors[ak.anchorName] = n
ak.metAnchor = false
}
}
func (ak *anchorsKeeper) DereferenceAlias(alias string) (ast.Node, error) {
anchored, ok := ak.anchors[alias]
if !ok {
return nil, AliasDereferenceError{name: alias}
}
return anchored, nil
}
func (ak *anchorsKeeper) clear() {
clear(ak.anchors)
ak.metAnchor = false
ak.anchorName = ""
}