Class: Opal::Nodes::DefNode

Inherits:
NodeWithArgs show all
Defined in:
opal/lib/opal/nodes/def.rb

Direct Known Subclasses

DefsNode

Instance Attribute Summary

Attributes inherited from NodeWithArgs

#arity, #original_args, #used_kwargs

Attributes inherited from ScopeNode

#block_name, #catch_return, #defs, #gvars, #has_break, #identity, #ivars, #locals, #methods, #mid, #name, #parent, #rescue_else_sexp, #scope_name, #uses_super, #uses_zuper

Attributes inherited from Base

#compiler, #type

Instance Method Summary collapse

Methods inherited from NodeWithArgs

#arity_check_node, #compile_arity_check, #compile_block_arg, #initialize, #parameters_code

Methods inherited from ScopeNode

#add_arg, #add_proto_ivar, #add_scope_gvar, #add_scope_ivar, #add_scope_local, #add_scope_temp, #class?, #class_scope?, #def?, #def_in_class?, #find_parent_def, #has_local?, #has_rescue_else?, #has_temp?, #identify!, #in_ensure, #in_ensure?, #in_scope, #in_while?, #initialize, #iter?, #module?, #new_temp, #next_temp, #pop_while, #push_while, #queue_temp, #sclass?, #super_chain, #to_vars, #top?, #uses_block!, #uses_block?

Methods inherited from Base

#add_gvar, #add_ivar, #add_local, #add_temp, #children, children, #class_variable_owner, #class_variable_owner_nesting_level, #comments, #compile_to_fragments, #error, #expr, #expr?, #expr_or_nil, #fragment, handle, handlers, #has_rescue_else?, #helper, #in_ensure, #in_ensure?, #in_while?, #initialize, #process, #push, #recv, #recv?, #s, #scope, #stmt, #stmt?, truthy_optimize?, #unshift, #while_loop, #with_temp, #wrap

Methods included from Helpers

#conditional_send, #current_indent, #empty_line, #indent, #js_falsy, #js_truthy, #js_truthy_optimize, #line, #mid_to_jsid, #property, #valid_name?

Constructor Details

This class inherits a constructor from Opal::Nodes::NodeWithArgs

Instance Method Details

#comments_code ⇒ Object 



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# File 'opal/lib/opal/nodes/def.rb', line 102

def comments_code
  '[' + comments.map { |comment| comment.text.inspect }.join(', ') + ']'
end

#compile ⇒ Object 



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# File 'opal/lib/opal/nodes/def.rb', line 12

def compile
  inline_params = nil
  scope_name = nil

  in_scope do
    scope.mid = mid
    scope.defs = true if @sexp.type == :defs

    scope.identify!
    scope_name = scope.identity

    # Setting a default block name (later can be overwritten by a blockarg)
    scope.block_name = '$yield'

    inline_params = process(inline_args)

    stmt_code = stmt(compiler.returns(stmts))

    compile_block_arg

    add_temp 'self = this'

    compile_arity_check

    if scope.uses_zuper
      prepare_super
    end

    unshift "\n#{current_indent}", scope.to_vars

    line stmt_code

    if scope.catch_return
      unshift "try {\n"
      line '} catch ($returner) { if ($returner === Opal.returner) { return $returner.$v }'
      push ' throw $returner; }'
    end
  end

  # There are some special utf8 chars that can be used as valid JS
  # identifiers, some examples:
  #
  # utf8_pond = 'ⵌ'
  # utf8_question = 'ʔ̣'
  # utf8_exclamation 'ǃ'
  #
  # For now we're just using $$, to maintain compatibility with older IEs.
  function_name = valid_name?(mid) ? " $$#{mid}" : ''

  unshift ') {'
  unshift(inline_params)
  unshift "function#{function_name}("
  unshift "#{scope_name} = " if scope_name
  line '}'

  push ", #{scope_name}.$$arity = #{arity}"

  if compiler.arity_check?
    push ", #{scope_name}.$$parameters = #{parameters_code}"
  end

  if compiler.parse_comments?
    push ", #{scope_name}.$$comments = #{comments_code}"
  end

  if compiler.enable_source_location?
    push ", #{scope_name}.$$source_location = #{source_location}"
  end

  wrap_with_definition
end

#prepare_super ⇒ Object 



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# File 'opal/lib/opal/nodes/def.rb', line 106

def prepare_super
  add_local '$zuper'
  add_local '$zuper_i'
  add_local '$zuper_ii'

  line '// Prepare super implicit arguments'
  line 'for($zuper_i = 0, $zuper_ii = arguments.length, $zuper = new Array($zuper_ii); $zuper_i < $zuper_ii; $zuper_i++) {'
  line '  $zuper[$zuper_i] = arguments[$zuper_i];'
  line '}'
end

#source_location ⇒ Object 



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# File 'opal/lib/opal/nodes/def.rb', line 94

def source_location
  file = @sexp.loc.expression.source_buffer.name
  file = "<internal:#{file}>" if file.start_with?("corelib/")
  file = "<js:#{file}>" if file.end_with?(".js")
  line = @sexp.loc.line
  "['#{file}', #{line}]"
end

#wrap_with_definition ⇒ Object 



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# File 'opal/lib/opal/nodes/def.rb', line 84

def wrap_with_definition
  wrap "Opal.def(self, '$#{mid}', ", ')'

  if expr?
    wrap '(', ", nil) && '#{mid}'"
  else
    unshift "\n#{current_indent}"
  end
end