Kyle Isom
c13c868e77
Vendor dependencies and expose mcproxyctl binary via nix build. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
65 lines
1.3 KiB
Go
65 lines
1.3 KiB
Go
package unstable
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// root contains a full AST.
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//
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// It is immutable once constructed with Builder.
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type root struct {
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nodes []Node
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}
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func (r *root) at(idx reference) *Node {
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return &r.nodes[idx]
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}
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type reference int
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const invalidReference reference = -1
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func (r reference) Valid() bool {
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return r != invalidReference
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}
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type builder struct {
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tree root
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lastIdx int
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}
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func (b *builder) NodeAt(ref reference) *Node {
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n := b.tree.at(ref)
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n.nodes = &b.tree.nodes
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return n
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}
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func (b *builder) Reset() {
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b.tree.nodes = b.tree.nodes[:0]
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b.lastIdx = 0
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}
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func (b *builder) Push(n Node) reference {
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b.lastIdx = len(b.tree.nodes)
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n.next = -1
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n.child = -1
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b.tree.nodes = append(b.tree.nodes, n)
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return reference(b.lastIdx)
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}
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func (b *builder) PushAndChain(n Node) reference {
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newIdx := len(b.tree.nodes)
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n.next = -1
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n.child = -1
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b.tree.nodes = append(b.tree.nodes, n)
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if b.lastIdx >= 0 {
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b.tree.nodes[b.lastIdx].next = int32(newIdx) //nolint:gosec // TOML ASTs are small
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}
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b.lastIdx = newIdx
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return reference(b.lastIdx)
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}
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func (b *builder) AttachChild(parent reference, child reference) {
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b.tree.nodes[parent].child = int32(child) //nolint:gosec // TOML ASTs are small
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}
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func (b *builder) Chain(from reference, to reference) {
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b.tree.nodes[from].next = int32(to) //nolint:gosec // TOML ASTs are small
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}
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