Class: Antlr4Native::Context

Inherits:
Object
  • Object
show all
Includes:
StringHelpers
Defined in:
lib/antlr4-native/context.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from StringHelpers

#capitalize, #dasherize, #underscore

Constructor Details

#initialize(name, parser_ns, cpp_parser_source) ⇒ Context

Returns a new instance of Context.



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# File 'lib/antlr4-native/context.rb', line 7

def initialize(name, parser_ns, cpp_parser_source)
  @name = name
  @parser_ns = parser_ns
  @cpp_parser_source = cpp_parser_source
end

Instance Attribute Details

#cpp_parser_source ⇒ Object (readonly)

Returns the value of attribute cpp_parser_source.



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# File 'lib/antlr4-native/context.rb', line 5

def cpp_parser_source
  @cpp_parser_source
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/antlr4-native/context.rb', line 5

def name
  @name
end

#parser_ns ⇒ Object (readonly)

Returns the value of attribute parser_ns.



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# File 'lib/antlr4-native/context.rb', line 5

def parser_ns
  @parser_ns
end

Instance Method Details

#class_wrapper(module_var) ⇒ Object 



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# File 'lib/antlr4-native/context.rb', line 164

def class_wrapper(module_var)
  @class_wrapper ||= begin
    lines = [
      "#{proxy_class_variable} = #{module_var}",
      ".define_class<#{name}Proxy, ContextProxy>(\"#{name}\")"
    ]

    each_context_method do |ctx_method|
      lines << ".define_method(\"#{underscore(ctx_method.cpp_name)}\", &#{name}Proxy::#{ctx_method.cpp_name})"
    end

    each_token_method do |token_method|
      lines << ".define_method(\"#{token_method.cpp_name}\", &#{name}Proxy::#{token_method.name})"
    end

    lines[-1] << ';'

    lines
  end
end

#conversions ⇒ Object 



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# File 'lib/antlr4-native/context.rb', line 52

def conversions
  @class_conversions ||= <<~END
    template <>
    Object to_ruby<#{parser_ns}::#{name}*>(#{parser_ns}::#{name}* const &x) {
      if (!x) return Nil;
      return Data_Object<#{parser_ns}::#{name}>(x, #{proxy_class_variable}, nullptr, nullptr);
    }

    template <>
    Object to_ruby<#{name}Proxy*>(#{name}Proxy* const &x) {
      if (!x) return Nil;
      return Data_Object<#{name}Proxy>(x, #{proxy_class_variable}, nullptr, nullptr);
    }
  END
end

#each_context_method ⇒ Object 



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# File 'lib/antlr4-native/context.rb', line 13

def each_context_method
  return to_enum(__method__) unless block_given?

  mtds.each do |mtd|
    yield mtd if mtd.context_method?
  end
end

#each_token_method ⇒ Object 



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# File 'lib/antlr4-native/context.rb', line 21

def each_token_method
  return to_enum(__method__) unless block_given?

  mtds.each do |mtd|
    yield mtd if mtd.token_method?
  end
end

#method_signatures_for(mtds) ⇒ Object 



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# File 'lib/antlr4-native/context.rb', line 46

def method_signatures_for(mtds)
  mtds
    .map { |mtd| "  Object #{mtd.cpp_name}(#{mtd.raw_args});" }
    .join("\n")
end

#proxy_class_context_methods ⇒ Object 



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# File 'lib/antlr4-native/context.rb', line 72

def proxy_class_context_methods
  each_context_method.map do |ctx_method|
    return_type = "#{capitalize(ctx_method.name)}Context"
    return_proxy_type = "#{return_type}Proxy"
    params = ctx_method.args.map(&:name).join(', ')

    if ctx_method.returns_vector?
      <<~END
        Object #{name}Proxy::#{ctx_method.cpp_name}(#{ctx_method.raw_args}) {
          Array a;

          if (orig != nullptr) {
            size_t count = ((#{parser_ns}::#{name}*)orig) -> #{ctx_method.name}(#{params}).size();

            for (size_t i = 0; i < count; i ++) {
              a.push(#{ctx_method.name}At(i));
            }
          }

          return a;
        }
      END
    else
      <<~END
        Object #{name}Proxy::#{ctx_method.cpp_name}(#{ctx_method.raw_args}) {
          if (orig == nullptr) {
            return Qnil;
          }

          auto ctx = ((#{parser_ns}::#{name}*)orig) -> #{ctx_method.name}(#{params});

          if (ctx == nullptr) {
            return Qnil;
          }

          for (auto child : getChildren()) {
            if (ctx == from_ruby<ContextProxy>(child).getOriginal()) {
              return child;
            }
          }

          return Nil;
        }
      END
    end
  end
end

#proxy_class_header ⇒ Object 



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# File 'lib/antlr4-native/context.rb', line 33

def proxy_class_header
  @proxy_class_header ||= begin
    <<~END
      class #{name}Proxy : public ContextProxy {
      public:
        #{name}Proxy(tree::ParseTree* ctx) : ContextProxy(ctx) {};
      #{method_signatures_for(each_context_method)}
      #{method_signatures_for(each_token_method)}
      };
    END
  end
end

#proxy_class_methods ⇒ Object 



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# File 'lib/antlr4-native/context.rb', line 68

def proxy_class_methods
  proxy_class_context_methods + proxy_class_token_methods
end

#proxy_class_token_methods ⇒ Object 



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# File 'lib/antlr4-native/context.rb', line 120

def proxy_class_token_methods
  each_token_method.map do |token_mtd|
    params = token_mtd.args.map(&:name).join(', ')

    if token_mtd.returns_vector?
      <<~END
        Object #{name}Proxy::#{token_mtd.cpp_name}(#{token_mtd.raw_args}) {
          Array a;

          if (orig == nullptr) {
            return a;
          }

          auto vec = ((#{parser_ns}::#{name}*)orig) -> #{token_mtd.name}(#{params});

          for (auto it = vec.begin(); it != vec.end(); it ++) {
            TerminalNodeProxy proxy(*it);
            a.push(proxy);
          }

          return a;
        }
      END
    else
      <<~END
        Object #{name}Proxy::#{token_mtd.cpp_name}(#{token_mtd.raw_args}) {
          if (orig == nullptr) {
            return Qnil;
          }

          auto token = ((#{parser_ns}::#{name}*)orig) -> #{token_mtd.name}(#{params});

          if (token == nullptr) {
            return Qnil;
          }

          TerminalNodeProxy proxy(token);
          return to_ruby(proxy);
        }
      END
    end
  end
end

#proxy_class_variable ⇒ Object 



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# File 'lib/antlr4-native/context.rb', line 29

def proxy_class_variable
  @proxy_class_variable ||= "rb_c#{name}"
end