Class: Opal::Nodes::TopNode

Inherits:
ScopeNode show all
Defined in:
opal/lib/opal/nodes/top.rb

Overview

Generates code for an entire file, i.e. the base sexp

Instance Attribute Summary

Attributes inherited from ScopeNode

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

Attributes inherited from Base

#compiler, #sexp, #type

Instance Method Summary collapse

Methods inherited from ScopeNode

#accepts_using?, #add_arg, #add_proto_ivar, #add_scope_gvar, #add_scope_ivar, #add_scope_local, #add_scope_temp, #class?, #class_scope?, #collect_refinements_temps, #current_rescue, #def?, #def_in_class?, #defines_lambda, #find_parent_def, #gen_retry_id, #has_local?, #has_rescue_else?, #has_temp?, #identify!, #in_ensure, #in_ensure?, #in_resbody, #in_resbody?, #in_rescue, #in_scope, #in_while?, #initialize, #is_lambda!, #iter?, #lambda?, #lambda_definition?, #module?, #new_refinements_temp, #new_temp, #next_temp, #pop_while, #push_while, #queue_temp, #refinements_temp, #sclass?, #scope_locals, #super_chain, #to_vars, #top?, #top_scope, #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_resbody, #in_resbody?, #in_rescue, #in_while?, #initialize, #process, #push, #recv, #recv?, #s, #scope, #source_location, #stmt, #stmt?, #top_scope, 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::ScopeNode

Instance Method Details

#add_used_helpers ⇒ Object 



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# File 'opal/lib/opal/nodes/top.rb', line 82

def add_used_helpers
  compiler.helpers.to_a.each { |h| add_temp "$#{h} = Opal.#{h}" }
end

#add_used_operators ⇒ Object 



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# File 'opal/lib/opal/nodes/top.rb', line 86

def add_used_operators
  operators = compiler.operator_helpers.to_a
  operators.each do |op|
    name = Nodes::CallNode::OPERATORS[op]
    line "function $rb_#{name}(lhs, rhs) {"
    line "  return (typeof(lhs) === 'number' && typeof(rhs) === 'number') ? lhs #{op} rhs : lhs['$#{op}'](rhs);"
    line '}'
  end
end

#closing ⇒ Object 



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# File 'opal/lib/opal/nodes/top.rb', line 62

def closing
  if compiler.requirable?
    line "};\n"
  elsif compiler.eval?
    line "})(Opal, self);"
  else
    line "});\n"
  end
end

#compile ⇒ Object 



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# File 'opal/lib/opal/nodes/top.rb', line 15

def compile
  push version_comment

  in_scope do
    line '"use strict";' if compiler.use_strict?

    body_code = stmt(stmts)
    body_code = [body_code] unless body_code.is_a?(Array)

    if compiler.eval?
      add_temp '$nesting = self.$$is_a_module ? [self] : [self.$$class]'
    else
      add_temp 'self = Opal.top'
      add_temp '$nesting = []'
    end
    add_temp 'nil = Opal.nil'
    add_temp '$$$ = Opal.$$$'
    add_temp '$$ = Opal.$$'

    add_used_helpers
    add_used_operators
    line scope.to_vars

    compile_method_stubs
    compile_irb_vars
    compile_end_construct

    line body_code
  end
  opening
  closing
end

#compile_end_construct ⇒ Object

Any special END content in code



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# File 'opal/lib/opal/nodes/top.rb', line 105

def compile_end_construct
  if content = compiler.eof_content
    line 'var $__END__ = Opal.Object.$new();'
    line "$__END__.$read = function() { return #{content.inspect}; };"
  end
end

#compile_irb_vars ⇒ Object 



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# File 'opal/lib/opal/nodes/top.rb', line 76

def compile_irb_vars
  if compiler.irb?
    line 'if (!Opal.irb_vars) { Opal.irb_vars = {}; }'
  end
end

#compile_method_stubs ⇒ Object 



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# File 'opal/lib/opal/nodes/top.rb', line 96

def compile_method_stubs
  if compiler.method_missing?
    calls = compiler.method_calls
    stubs = calls.to_a.map { |k| "'$#{k}'" }.join(', ')
    line "Opal.add_stubs([#{stubs}]);" unless stubs.empty?
  end
end

#opening ⇒ Object 



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# File 'opal/lib/opal/nodes/top.rb', line 48

def opening
  async_prefix = "async " if await_encountered

  if compiler.requirable?
    unshift "Opal.modules[#{Opal::Compiler.module_name(compiler.file).inspect}] = #{async_prefix}function(Opal) {"
  elsif compiler.eval?
    unshift "(#{async_prefix}function(Opal, self) {"
  elsif compiler.esm?
    unshift "export default Opal.queue(#{async_prefix}function(Opal) {"
  else
    unshift "Opal.queue(#{async_prefix}function(Opal) {"
  end
end

#stmts ⇒ Object 



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# File 'opal/lib/opal/nodes/top.rb', line 72

def stmts
  compiler.returns(body)
end

#version_comment ⇒ Object 



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# File 'opal/lib/opal/nodes/top.rb', line 112

def version_comment
  "/* Generated by Opal #{Opal::VERSION} */"
end