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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

Attributes included from Closure::NodeSupport

#closure

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? , #nesting , #new_refinements_temp , #new_temp , #next_temp , #pop_while , #prepare_block , #prepend_scope_temp , #push_while , #queue_temp , #refinements_temp , #relative_access , #sclass? , #scope_locals , #self , #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_empty , #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 Closure::NodeSupport

#closure_is? , #compile_catcher , #generate_thrower , #generate_thrower_without_catcher , #in_closure , #pop_closure , #push_closure , #select_closure , #thrower

Methods included from Helpers

#current_indent , #empty_line , #indent , #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

#absolute_const ⇒ Object

Returns '$$$', but also ensures that the '$$$' variable is set

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# File 'opal/lib/opal/nodes/top.rb', line 117
def absolute_const
 @define_absolute_const = true
 '$$$'
end

#add_file_source_embed ⇒ Object 

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# File 'opal/lib/opal/nodes/top.rb', line 152
def add_file_source_embed
 filename = compiler.file
 source = compiler.source
 unshift "Opal.file_sources[#{filename.to_json}] = #{source.to_json};\n"
end

#add_used_helpers ⇒ Object 

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# File 'opal/lib/opal/nodes/top.rb', line 128
def add_used_helpers
 compiler.helpers.to_a.reverse_each { |h| prepend_scope_temp "$#{h} = Opal.#{h}" }
end

#closing ⇒ Object 

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# File 'opal/lib/opal/nodes/top.rb', line 94
def closing
 if compiler.requirable?
 line "};\n"
 if compiler.load?
 # Opal.load normalizes the path, so that we can't
 # require absolute paths from CLI. For other cases
 # we can expect the module names to be normalized
 # already.
 line "Opal.load_normalized(#{module_name});"
 end
 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 16
def compile
 compiler.top_scope = self
 compiler.dynamic_cache_result = true if sexp.meta[:dynamic_cache_result]
 push version_comment
 helper :return_val if compiler.eof_content
 if body == s(:nil)
 # A shortpath for empty (stub?) modules.
 if compiler.requirable? || compiler.esm? || compiler.eval?
 unshift 'Opal.return_val(Opal.nil); '
 definition
 else
 unshift 'Opal.nil; '
 end
 else
 in_scope do
 line '"use strict";' if compiler.use_strict?
 body_code = in_closure(Closure ::JS_FUNCTION | Closure ::TOP) do
 stmt(stmts)
 end
 body_code = [body_code] unless body_code.is_a?(Array)
 if compiler.eval?
 add_temp '$nesting = self.$$is_a_module ? [self] : [self.$$class]' if @define_nesting
 else
 add_temp 'self = Opal.top' if @define_self
 add_temp '$nesting = []' if @define_nesting
 end
 add_temp '$$ = Opal.$r($nesting)' if @define_relative_access
 add_temp 'nil = Opal.nil'
 add_temp '$$$ = Opal.$$$' if @define_absolute_const
 add_used_helpers
 line scope.to_vars
 compile_method_stubs
 compile_irb_vars
 compile_end_construct
 line body_code
 end
 opening
 definition
 closing
 end
 add_file_source_embed if compiler.enable_file_source_embed?
end

#compile_end_construct ⇒ Object

Any special END content in code

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# File 'opal/lib/opal/nodes/top.rb', line 141
def compile_end_construct
 if content = compiler.eof_content
 line 'var $__END__ = Opal.Object.$new();'
 line "$__END__.$read = $return_val(#{content.inspect});"
 end
end

#compile_irb_vars ⇒ Object 

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# File 'opal/lib/opal/nodes/top.rb', line 122
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 132
def compile_method_stubs
 if compiler.method_missing?
 calls = compiler.method_calls
 stubs = calls.to_a.map(&:to_s).join(',')
 line "Opal.add_stubs('#{stubs}');" unless stubs.empty?
 end
end

#definition ⇒ Object 

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# File 'opal/lib/opal/nodes/top.rb', line 74
def definition
 if compiler.requirable?
 unshift "Opal.modules[#{module_name}] = "
 elsif compiler.esm? && !compiler.no_export?
 unshift 'export default '
 end
end

#module_name ⇒ Object 

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# File 'opal/lib/opal/nodes/top.rb', line 70
def module_name
 Opal ::Compiler .module_name (compiler.file).inspect
end

#opening ⇒ Object 

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# File 'opal/lib/opal/nodes/top.rb', line 82
def opening
 async_prefix = "async " if await_encountered
 if compiler.requirable?
 unshift "#{async_prefix}function(Opal) {"
 elsif compiler.eval?
 unshift "(#{async_prefix}function(Opal, self) {"
 else
 unshift "Opal.queue(#{async_prefix}function(Opal) {"
 end
end

#stmts ⇒ Object 

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# File 'opal/lib/opal/nodes/top.rb', line 112
def stmts
 compiler.returns(body)
end

#version_comment ⇒ Object 

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# File 'opal/lib/opal/nodes/top.rb', line 148
def version_comment
 "/* Generated by Opal #{Opal ::VERSION } */"
end

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