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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 100
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 $,ドル 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 104
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
 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

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