struct

Sthx::TreeData

Tree consists of two parts: a "header" part with the tree's capture id, begin character index, and span; and a "body" part. TreeData is this body part. It is filled by callees and then wrapped in a tree by the caller after it determines the end position. A tree cannot be constructed without knowing the end position - and a tree "body", TreeData, can.

Constructors

new(children : Pf::Map(Int32, Tree) | Nil = nil, attributes : Pf::Map(String, Bytes) | Nil = nil)

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Instance methods

append(tree : Tree)

Returns a copy of self with tree appended as a child tree.

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degree

Returns the number of children.

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each_attribute

Yields each attribute: its name and a string view of its value.

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each_child

Yields each child tree.

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empty?

Returns true if this tree data object stores no children and no attributes.

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getattr?(name : String) : Bytes | Nil

Returns a string view of the value of the attribute with the given name. If there is no such attribute, returns nil.

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getchild?(n : Int32) : Tree | Nil

Returns the nth child tree.

Returns nil if n is out of bounds.

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inspect(io, tree, inner, outer)

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setattr(name : String, value : Bytes) : TreeData

Returns a copy of self where the attribute with the given name is assigned to value, a string view of the value of the attribute.

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