AST

[Source]

A labeled node in the parse tree. Contains an ordered list of children (other AST nodes, Tokens, or NotPresent values from optional matches).

class val AST

Constructors

create

[Source]

new iso create(
  label': Label val = reference)
: AST iso^

Parameters

• label': Label val = reference

Returns

• AST iso^

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Public fields

embed children: Array[(AST val | Token val | NotPresent val)] ref

[Source]

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Public Functions

push

[Source]

Append a child to this node.

fun ref push(
  some: (AST val | Token val | NotPresent val))
: None val

Parameters

• some: (AST val | Token val | NotPresent val)

Returns

• None val

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label

[Source]

This node's label.

fun box label()
: Label val

Returns

• Label val

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size

[Source]

The number of children.

fun box size()
: USize val

Returns

• USize val

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extract

[Source]

Return the first child, or NotPresent if there are none.

fun box extract()
: (AST val | Token val | NotPresent val)

Returns

• (AST val | Token val | NotPresent val)

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