class Prism::BeginNode - Documentation for Ruby 4.0
Description: class Prism::BeginNode: Represents a begin statement.
Keywords: ruby,class,Prism::BeginNode

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# class Prism::BeginNode

Represents a begin statement.

    begin
      foo
    end
    ^^^^^

### Attributes

else_clause [R]

Represents the else clause within the begin block.

    begin x; rescue y; else z; end
                       ^^^^^^

ensure_clause [R]

Represents the ensure clause within the begin block.

    begin x; ensure y; end
             ^^^^^^^^

rescue_clause [R]

Represents the rescue clause within the begin block.

    begin x; rescue y; end
             ^^^^^^^^

statements [R]

Represents the statements within the begin block.

    begin x end
          ^

### Public Class Methods

new (source, node_id, location, flags, begin_keyword_loc, statements, rescue_clause, else_clause, ensure_clause, end_keyword_loc)
Source

    # File lib/prism/node.rb, line 1581
    def initialize(source, node_id, location, flags, begin_keyword_loc, statements, rescue_clause, else_clause, ensure_clause, end_keyword_loc)
      @source = source
      @node_id = node_id
      @location = location
      @flags = flags
      @begin_keyword_loc = begin_keyword_loc
      @statements = statements
      @rescue_clause = rescue_clause
      @else_clause = else_clause
      @ensure_clause = ensure_clause
      @end_keyword_loc = end_keyword_loc
    end

Initialize a new `BeginNode` node.

type ()
Source

    # File lib/prism/node.rb, line 1731
    def self.type
      :begin_node
    end

Return a symbol representation of this node type. See `Node::type`.

### Public Instance Methods

=== (other)
Source

    # File lib/prism/node.rb, line 1737
    def ===(other)
      other.is_a?(BeginNode) &&
        (begin_keyword_loc.nil? == other.begin_keyword_loc.nil?) &&
        (statements === other.statements) &&
        (rescue_clause === other.rescue_clause) &&
        (else_clause === other.else_clause) &&
        (ensure_clause === other.ensure_clause) &&
        (end_keyword_loc.nil? == other.end_keyword_loc.nil?)
    end

Implements case-equality for the node. This is effectively == but without comparing the value of locations. Locations are checked only for presence.

accept (visitor)
Source

    # File lib/prism/node.rb, line 1595
    def accept(visitor)
      visitor.visit_begin_node(self)
    end

def accept: (`Visitor` visitor) -> void

begin_keyword ()
Source

    # File lib/prism/node.rb, line 1711
    def begin_keyword
      begin_keyword_loc&.slice
    end

def `begin_keyword`: () -> `String`?

begin_keyword_loc ()
Source

    # File lib/prism/node.rb, line 1646
    def begin_keyword_loc
      location = @begin_keyword_loc
      case location
      when nil
        nil
      when Location
        location
      else
        @begin_keyword_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
      end
    end

Represents the location of the `begin` keyword.

    begin x end
    ^^^^^

child_nodes ()
Source

    # File lib/prism/node.rb, line 1600
    def child_nodes
      [statements, rescue_clause, else_clause, ensure_clause]
    end

def `child_nodes`: () -> Array

Also aliased as: deconstruct
comment_targets ()
Source

    # File lib/prism/node.rb, line 1625
    def comment_targets
      [*begin_keyword_loc, *statements, *rescue_clause, *else_clause, *ensure_clause, *end_keyword_loc] #: Array[Prism::node | Location]
    end

def `comment_targets`: () -> Array[Node | Location]

compact_child_nodes ()
Source

    # File lib/prism/node.rb, line 1615
    def compact_child_nodes
      compact = [] #: Array[Prism::node]
      compact << statements if statements
      compact << rescue_clause if rescue_clause
      compact << else_clause if else_clause
      compact << ensure_clause if ensure_clause
      compact
    end

def `compact_child_nodes`: () -> Array

copy (node_id: self.node_id, location: self.location, flags: self.flags, begin_keyword_loc: self.begin_keyword_loc, statements: self.statements, rescue_clause: self.rescue_clause, else_clause: self.else_clause, ensure_clause: self.ensure_clause, end_keyword_loc: self.end_keyword_loc)
Source

    # File lib/prism/node.rb, line 1630
    def copy(node_id: self.node_id, location: self.location, flags: self.flags, begin_keyword_loc: self.begin_keyword_loc, statements: self.statements, rescue_clause: self.rescue_clause, else_clause: self.else_clause, ensure_clause: self.ensure_clause, end_keyword_loc: self.end_keyword_loc)
      BeginNode.new(source, node_id, location, flags, begin_keyword_loc, statements, rescue_clause, else_clause, ensure_clause, end_keyword_loc)
    end

def copy: (?node_id: `Integer`, ?location: `Location`, ?flags: `Integer`, ?begin_keyword_loc: `Location`?, ?statements: `StatementsNode`?, ?rescue_clause: `RescueNode`?, ?else_clause: `ElseNode`?, ?ensure_clause: `EnsureNode`?, ?end_keyword_loc: `Location`?) -> `BeginNode`

deconstruct ()

def deconstruct: () -> Array

Alias for: child_nodes
deconstruct_keys (keys)
Source

    # File lib/prism/node.rb, line 1638
    def deconstruct_keys(keys)
      { node_id: node_id, location: location, begin_keyword_loc: begin_keyword_loc, statements: statements, rescue_clause: rescue_clause, else_clause: else_clause, ensure_clause: ensure_clause, end_keyword_loc: end_keyword_loc }
    end

def `deconstruct_keys`: (Array keys) -> { node_id: `Integer`, location: `Location`, `begin_keyword_loc`: `Location`?, statements: `StatementsNode`?, `rescue_clause`: `RescueNode`?, `else_clause`: `ElseNode`?, `ensure_clause`: `EnsureNode`?, `end_keyword_loc`: `Location`? }

each_child_node () { |statements| ... }
Source

    # File lib/prism/node.rb, line 1605
    def each_child_node
      return to_enum(:each_child_node) unless block_given?

      yield statements if statements
      yield rescue_clause if rescue_clause
      yield else_clause if else_clause
      yield ensure_clause if ensure_clause
    end

def `each_child_node`: () { (Prism::node) -> void } -> void | () -> Enumerator

end_keyword ()
Source

    # File lib/prism/node.rb, line 1716
    def end_keyword
      end_keyword_loc&.slice
    end

def `end_keyword`: () -> `String`?

end_keyword_loc ()
Source

    # File lib/prism/node.rb, line 1692
    def end_keyword_loc
      location = @end_keyword_loc
      case location
      when nil
        nil
      when Location
        location
      else
        @end_keyword_loc = Location.new(source, location >> 32, location & 0xFFFFFFFF)
      end
    end

Represents the location of the `end` keyword.

    begin x end
            ^^^

inspect ()
Source

    # File lib/prism/node.rb, line 1721
    def inspect
      InspectVisitor.compose(self)
    end

def inspect -> `String`

save_begin_keyword_loc (repository)
Source

    # File lib/prism/node.rb, line 1660
    def save_begin_keyword_loc(repository)
      repository.enter(node_id, :begin_keyword_loc) unless @begin_keyword_loc.nil?
    end

Save the `begin_keyword_loc` location using the given saved source so that it can be retrieved later.

save_end_keyword_loc (repository)
Source

    # File lib/prism/node.rb, line 1706
    def save_end_keyword_loc(repository)
      repository.enter(node_id, :end_keyword_loc) unless @end_keyword_loc.nil?
    end

Save the `end_keyword_loc` location using the given saved source so that it can be retrieved later.

type ()
Source

    # File lib/prism/node.rb, line 1726
    def type
      :begin_node
    end

Return a symbol representation of this node type. See `Node#type`.