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Note: This integration is not finished, and therefore still has many inconsistencies with Ripper. If you’d like to help out, pull requests would be greatly appreciated!

This class is meant to provide a compatibility layer between prism and Ripper. It functions by parsing the entire tree first and then walking it and executing each of the Ripper callbacks as it goes.

This class is going to necessarily be slower than the native Ripper API. It is meant as a stopgap until developers migrate to using prism. It is also meant as a test harness for the prism parser.

To use this class, you treat ‘Prism::RipperCompat` effectively as you would treat the `Ripper` class.

Namespace
Methods
E
N
P
S
V

Attributes

[R] column

The current column number of the parser.
[R] lineno

The current line number of the parser.
[R] source

The source that is being parsed.

Class Public methods

new(source)

Create a new RipperCompat object with the given source.

Source: show | on GitHub 

# File ruby/lib/prism/ripper_compat.rb, line 74
def initialize(source)
  @source = source
  @result = nil
  @lineno = nil
  @column = nil
end

sexp(source)

This is a convenience method that runs the SexpBuilderPP subclass parser.

Source: show | on GitHub 

# File ruby/lib/prism/ripper_compat.rb, line 171
def self.sexp(source)
  SexpBuilderPP.new(source).parse
end

sexp_raw(source)

This is a convenience method that runs the SexpBuilder subclass parser.

Source: show | on GitHub 

# File ruby/lib/prism/ripper_compat.rb, line 166
def self.sexp_raw(source)
  SexpBuilder.new(source).parse
end

Instance Public methods

error?()

True if the parser encountered an error during parsing.

Source: show | on GitHub 

# File ruby/lib/prism/ripper_compat.rb, line 86
def error?
  result.failure?
end

parse()

Parse the source and return the result.

Source: show | on GitHub 

# File ruby/lib/prism/ripper_compat.rb, line 91
def parse
  result.magic_comments.each do |magic_comment|
    on_magic_comment(magic_comment.key, magic_comment.value)
  end

  if error?
    result.errors.each do |error|
      on_parse_error(error.message)
    end
  else
    result.value.accept(self)
  end
end

visit_call_node(node)

Visit a CallNode node.

Source: show | on GitHub 

# File ruby/lib/prism/ripper_compat.rb, line 110
def visit_call_node(node)
  if !node.message.match?(/^[[:alpha:]_]/) && node.opening_loc.nil? && node.arguments&.arguments&.length == 1
    left = visit(node.receiver)
    right = visit(node.arguments.arguments.first)

    bounds(node.location)
    on_binary(left, node.name, right)
  else
    raise NotImplementedError
  end
end

visit_float_node(node)

Visit a FloatNode node.

Source: show | on GitHub 

# File ruby/lib/prism/ripper_compat.rb, line 123
def visit_float_node(node)
  bounds(node.location)
  on_float(node.slice)
end

visit_imaginary_node(node)

Visit a ImaginaryNode node.

Source: show | on GitHub 

# File ruby/lib/prism/ripper_compat.rb, line 129
def visit_imaginary_node(node)
  bounds(node.location)
  on_imaginary(node.slice)
end

visit_integer_node(node)

Visit an IntegerNode node.

Source: show | on GitHub 

# File ruby/lib/prism/ripper_compat.rb, line 135
def visit_integer_node(node)
  bounds(node.location)
  on_int(node.slice)
end

visit_program_node(node)

Visit a ProgramNode node.

Source: show | on GitHub 

# File ruby/lib/prism/ripper_compat.rb, line 155
def visit_program_node(node)
  statements = visit(node.statements)
  bounds(node.location)
  on_program(statements)
end

visit_rational_node(node)

Visit a RationalNode node.

Source: show | on GitHub 

# File ruby/lib/prism/ripper_compat.rb, line 141
def visit_rational_node(node)
  bounds(node.location)
  on_rational(node.slice)
end

visit_statements_node(node)

Visit a StatementsNode node.

Source: show | on GitHub 

# File ruby/lib/prism/ripper_compat.rb, line 147
def visit_statements_node(node)
  bounds(node.location)
  node.body.inject(on_stmts_new) do |stmts, stmt|
    on_stmts_add(stmts, visit(stmt))
  end
end