[Elixir]diff of struct against elixir 1.2.6 and 1.3.1

pattern match with struct

• Structでもpattern matchingすることができる
  • [Kernel] Allow variable struct names when matching, for example, %module{key: “value”} = struct

__struct__

__struct__ が補完候補に出てこない。けれど、使うことは可能。

• Elixir 1.2.6

iex(1)> Version.
InvalidRequirementError    InvalidVersionError
Parser                     Requirement
__struct__/0               compare/2
match?/2                   parse/1

• Elixir 1.3.1

iex(1)> Version.
InvalidRequirementError    InvalidVersionError
Parser                     Requirement
compare/2                  compile_requirement/1
match?/2                   match?/3
parse!/1                   parse/1
parse_requirement/1

ただし、Elixir1.3.1でも、

iex(1)> Version.__struct__
%Inspect.Error{message: "got Protocol.UndefinedError with message \"protocol Enumerable not implemented for nil\" while inspecting %{__struct__: Version, build: nil, major: nil, minor: nil, patch: nil, pre: nil}"}
iex(1)> %Version{}
%Inspect.Error{message: "got Protocol.UndefinedError with message \"protocol Enumerable not implemented for nil\" while inspecting %{__struct__: Version, build: nil, major: nil, minor: nil, patch: nil, pre: nil}"}

と使うことは可能。