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Versions: 6
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Contents
module MethodSig
class Argument
attr_reader :name
def required?
return !optional?
end
def optional?
return rest? || block?
end
def rest?
return @is_rest
end
def block?
return @is_block
end
def default
return nil
end
def initialize(name, is_rest, is_block)
@name = name
@is_rest = is_rest
@is_block = is_block
end
def to_s
if @is_rest then
prefix = "*"
elsif @is_block then
prefix = "&"
end
if self.default then
suffix = "=#{default()}"
end
return "#{prefix}#{@name}#{suffix}"
end
end
class OptionalArgument < Argument
def optional?
return true
end
end
class NodeOptionalArgument < OptionalArgument
attr_reader :node_for_default
attr_reader :default
def initialize(name, default, node_for_default, is_rest, is_block)
super(name, is_rest, is_block)
@default = default
@node_for_default = node_for_default
end
end
class YarvOptionalArgument < OptionalArgument
attr_reader :iseq
attr_reader :pc_start
attr_reader :local_idx
def initialize(name, iseq, pc_start, local_idx, is_rest, is_block)
super(name, is_rest, is_block)
@iseq = iseq
@pc_start = pc_start
@local_idx = local_idx
@default = nil
end
def inspect
default()
super
end
def default
return @default if @default
env = Internal::ByteDecoder::Environment.new(@iseq.local_table())
local_table_idx = local_table_idx()
@iseq.bytedecode(env, @pc_start) do |instr|
RubyVM::Instruction::SETLOCAL === instr &&
instr.operands[0] == local_table_idx
end
expressions = env.expressions + env.stack
@default = expressions[0].rhs.to_s
return @default
end
def local_table_idx
return @iseq.local_table.size - @local_idx + 1
end
end
end
Version data entries
6 entries across 6 versions & 2 rubygems