Sha256: 8dbc2de6ec5f0f67457c6f72e947256225da5ede15a816d8721c8b3fe5482bfd
Contents?: true
Size: 1.26 KB
Versions: 8
Compression:
Stored size: 1.26 KB
Contents
# Used internally for representing a bind placeholder in a Parslet::Transform
# pattern. This is the superclass for all bindings.
#
# It defines the most permissive kind of bind, the one that matches any subtree
# whatever it looks like.
#
class Parslet::Pattern::SubtreeBind < Struct.new(:symbol) # :nodoc:
def variable_name
symbol
end
def inspect
"#{bind_type_name}(#{symbol.inspect})"
end
def can_bind?(subtree)
true
end
private
def bind_type_name
if md=self.class.name.match(/(\w+)Bind/)
md.captures.first.downcase
else
# This path should never be used, but since this is for inspection only,
# let's not raise.
'unknown_bind'
end
end
end
# Binds a symbol to a simple subtree, one that is not either a sequence of
# elements or a collection of attributes.
#
class Parslet::Pattern::SimpleBind < Parslet::Pattern::SubtreeBind # :nodoc:
def can_bind?(subtree)
not [Hash, Array].include?(subtree.class)
end
end
# Binds a symbol to a sequence of simple leafs ([element1, element2, ...])
#
class Parslet::Pattern::SequenceBind < Parslet::Pattern::SubtreeBind # :nodoc:
def can_bind?(subtree)
subtree.kind_of?(Array) &&
(not subtree.any? { |el| [Hash, Array].include?(el.class) })
end
end
Version data entries
8 entries across 8 versions & 1 rubygems