class Ast

# Ast provides the compiler/ast/Ast standard library API.
class Ast
  # Ast.children provides the compiler/ast/Ast standard library operation.
  # @param node Any node value.
  # @return Any the resulting value.
  children: node ->
    out = []
    Ast().push_children(out, node, "body")
    Ast().push_children(out, node, "then")
    Ast().push_children(out, node, "else")
    Ast().push_children(out, node, "targets")
    Ast().push_children(out, node, "values")
    Ast().push_children(out, node, "args")
    Ast().push_children(out, node, "elements")
    Ast().push_child(out, node, "expr")
    Ast().push_child(out, node, "cond")
    Ast().push_child(out, node, "callee")
    Ast().push_child(out, node, "left")
    Ast().push_child(out, node, "right")
    Ast().push_child(out, node, "target")
    Ast().push_child(out, node, "iterable")
    out

  # Ast.kind provides the compiler/ast/Ast standard library operation.
  # @param node Any node value.
  # @return Any the resulting value.
  kind: node ->
    compiler_ast_kind(node)

  # Ast.push_child provides the compiler/ast/Ast standard library operation.
  # @param out Any out value.
  # @param node Any node value.
  # @param key String key value.
  # @return Any the resulting value.
  push_child: out, node, key ->
    if node.has(key)
      out.push(node[key])
    nil

  # Ast.push_children provides the compiler/ast/Ast standard library operation.
  # @param out Any out value.
  # @param node Any node value.
  # @param key String key value.
  # @return Any the resulting value.
  push_children: out, node, key ->
    if node.has(key)
      ast_children_values = node[key]
      i = 0
      while i < ast_children_values.len()
        out.push(ast_children_values[i])
        i = i + 1
    nil

  # Ast.span provides the compiler/ast/Ast standard library operation.
  # @param node Any node value.
  # @return Any the resulting value.
  span: node ->
    compiler_ast_span(node)

  # Ast.walk provides the compiler/ast/Ast standard library operation.
  # @param node Any node value.
  # @param visitor Any visitor value.
  # @return Any the resulting value.
  walk: node, visitor ->
    visitor(node)
    ast_walk_children = Ast().children(node)
    i = 0
    while i < ast_walk_children.len()
      Ast().walk(ast_walk_children[i], visitor)
      i = i + 1
    nil