.gitignore

.bundle
vendor/bundle
*~
*.swp

README.md

LLVM-ClangのASTを解析するまっとうな方法について を ruby で扱った場合どうなるか検討資料。

• clangana.rb : 「AST を解析する方法」
• clanganaxml.rb : 「ちょっとした XML を吐こうとすると」

使用方法

bundle install --path=vendor/bundle
bundle exec ruby clanganaxml.rb source.c

注： ast への変換 (emit-ast) は不要。

clangana.rb

#!/bin/env ruby

require "ffi/clang"

if $0 == __FILE__
  index = FFI::Clang::Index.new

  tu = index.parse_translation_unit(ARGV[0])
  tu.cursor.visit_children do |cursor, parent, client_data|
    puts cursor.kind_spelling
    :recurse
  end
end

clanganaxml.rb

#!/bin/env ruby

require "ffi/clang"
require "builder"

if $0 == __FILE__
  index = FFI::Clang::Index.new

  builder = Builder::XmlMarkup.new(:target => $stdout, :indent => 1)

  visit_children_callback = lambda do |cursor, parent|
    entity_attr = {
      :usr => cursor.usr,
      :kind => cursor.kind_spelling,
      :src => [cursor.location.file, cursor.location.line, cursor.location.column].join(":"),
    }
    builder.entity(entity_attr) do
      cursor.visit_children(&visit_children_callback)
    end

    :continue
  end

  builder.ast do
    tu = index.parse_translation_unit(ARGV[0])
    tu.cursor.visit_children(&visit_children_callback)
  end
end

Gemfile

source "https://rubygems.org"

gem "ffi-clang"
gem "builder"

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    builder (3.2.2)
    ffi (1.9.14)
    ffi-clang (0.3.0)
      ffi

PLATFORMS
  ruby

DEPENDENCIES
  builder
  ffi-clang