Module: Opal::Nodes::Closure::NodeSupport
- Included in:
- Base
- Defined in:
- opal/lib/opal/nodes/closure.rb
Instance Attribute Summary collapse
-
#closure ⇒ Object
Returns the value of attribute closure.
Instance Method Summary collapse
- #closure_is?(type) ⇒ Boolean
-
#compile_catcher ⇒ Object
Generate a catcher if thrower has been used.
- #generate_thrower(type, closure, value) ⇒ Object
- #generate_thrower_without_catcher(type, closure, value) ⇒ Object
- #in_closure(type = JS_FUNCTION) ⇒ Object
- #pop_closure ⇒ Object
- #push_closure(type = JS_FUNCTION) ⇒ Object
- #select_closure(type = ANY, break_after: NONE) ⇒ Object
- #thrower(type, value = nil) ⇒ Object
Instance Attribute Details
#closure ⇒ Object
Returns the value of attribute closure.
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# File 'opal/lib/opal/nodes/closure.rb', line 79 def closure @closure end |
Instance Method Details
#closure_is?(type) ⇒ Boolean
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# File 'opal/lib/opal/nodes/closure.rb', line 202 def closure_is?(type) @closure.is?(type) end |
#compile_catcher ⇒ Object
Generate a catcher if thrower has been used
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# File 'opal/lib/opal/nodes/closure.rb', line 207 def compile_catcher catchers = @closure.catchers return if catchers.empty? helper :thrower push "} catch($e) {" indent do @closure.catchers.each do |type| case type when :eval_return line "if ($e === Opal.t_eval_return) return $e.$v;" else line "if ($e === $t_#{type}) return $e.$v;" end end line "throw $e;" end line "}" unshift "return " if closure_is? SEND unshift "var ", catchers.map { |type| "$t_#{type} = $thrower('#{type}')" }.join(", "), "; " unshift "try { " unless closure_is? JS_FUNCTION if scope.await_encountered wrap "(await (async function(){", "})())" else wrap "(function(){", "})()" end end end |
#generate_thrower(type, closure, value) ⇒ Object
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# File 'opal/lib/opal/nodes/closure.rb', line 102 def generate_thrower(type, closure, value) id = closure.register_catcher(type) closure.register_thrower(type, id) push id, '.$throw(', expr_or_empty(value), ')' id end |
#generate_thrower_without_catcher(type, closure, value) ⇒ Object
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# File 'opal/lib/opal/nodes/closure.rb', line 109 def generate_thrower_without_catcher(type, closure, value) helper :thrower if closure.throwers.key? type id = closure.throwers[type] else id = compiler.unique_temp('t_') scope = closure.node.scope&.parent || top_scope scope.add_scope_temp("#{id} = $thrower('#{type}')") closure.register_thrower(type, id) end push id, '.$throw(', expr_or_empty(value), ')' id end |
#in_closure(type = JS_FUNCTION) ⇒ Object
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# File 'opal/lib/opal/nodes/closure.rb', line 88 def in_closure(type = JS_FUNCTION) closure = push_closure(type) out = yield closure pop_closure out end |
#pop_closure ⇒ Object
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# File 'opal/lib/opal/nodes/closure.rb', line 81 def pop_closure compile_catcher @compiler.closure_stack.pop last = @compiler.closure_stack.last @closure = last if last&.node == self end |
#push_closure(type = JS_FUNCTION) ⇒ Object
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# File 'opal/lib/opal/nodes/closure.rb', line 73 def push_closure(type = JS_FUNCTION) closure = Closure.new(self, type, select_closure) @compiler.closure_stack << closure @closure = closure end |
#select_closure(type = ANY, break_after: NONE) ⇒ Object
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# File 'opal/lib/opal/nodes/closure.rb', line 95 def select_closure(type = ANY, break_after: NONE) @compiler.closure_stack.reverse.find do |i| break if (i.type & break_after) != 0 (i.type & type) != 0 end end |
#thrower(type, value = nil) ⇒ Object
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# File 'opal/lib/opal/nodes/closure.rb', line 124 def thrower(type, value = nil) case type when :return thrower_closure = select_closure(DEF, break_after: MODULE | TOP) last_closure = select_closure(JS_FUNCTION) if !thrower_closure iter_closure = select_closure(ITER, break_after: DEF | MODULE | TOP) if iter_closure generate_thrower_without_catcher(:return, iter_closure, value) elsif compiler.eval? push 'Opal.t_eval_return.$throw(', expr_or_empty(value), ')' else error 'Invalid return' end elsif thrower_closure == last_closure push 'return ', expr_or_nil(value) else id = generate_thrower(:return, thrower_closure, value) # Additionally, register our thrower on the surrounding iter, if present iter_closure = select_closure(ITER, break_after: DEF | MODULE | TOP) iter_closure.register_thrower(:return, id) if iter_closure end when :eval_return thrower_closure = select_closure(DEF | LAMBDA, break_after: MODULE | TOP) if thrower_closure thrower_closure.register_catcher(:eval_return) end when :next, :redo thrower_closure = select_closure(ITER | LOOP_INSIDE, break_after: DEF | MODULE | TOP) last_closure = select_closure(JS_FUNCTION | JS_LOOP_INSIDE) if !thrower_closure error 'Invalid next' elsif thrower_closure == last_closure if thrower_closure.is? LOOP_INSIDE push 'continue' elsif thrower_closure.is? ITER | LAMBDA push 'return ', expr_or_nil(value) end else generate_thrower(:next, thrower_closure, value) end when :break thrower_closure = select_closure(SEND | LAMBDA | LOOP, break_after: DEF | MODULE | TOP) last_closure = select_closure(JS_FUNCTION | JS_LOOP) if !thrower_closure iter_closure = select_closure(ITER, break_after: DEF | MODULE | TOP) if iter_closure generate_thrower_without_catcher(:break, iter_closure, value) else error 'Invalid break' end elsif thrower_closure == last_closure if thrower_closure.is? JS_FUNCTION | LAMBDA push 'return ', expr_or_nil(value) elsif thrower_closure.is? LOOP push 'break' end else generate_thrower(:break, thrower_closure, value) end when :retry thrower_closure = select_closure(RESCUE_RETRIER, break_after: DEF | MODULE | TOP) last_closure = select_closure(JS_LOOP_INSIDE) if !thrower_closure error 'Invalid retry' elsif thrower_closure == last_closure push 'continue' else generate_thrower(:retry, thrower_closure, value) end end end |