Class: Opal::Nodes::ArityCheckNode
- Inherits:
-
Base
- Object
- Base
- Opal::Nodes::ArityCheckNode
show all
- Defined in:
- opal/lib/opal/nodes/args/arity_check.rb
Instance Attribute Summary
Attributes inherited from Base
#compiler, #sexp, #type
#closure
Instance Method Summary
collapse
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?, #process, #push, #recv, #recv?, #s, #scope, #source_location, #stmt, #stmt?, #top_scope, truthy_optimize?, #unshift, #while_loop, #with_temp, #wrap
#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
Returns a new instance of ArityCheckNode.
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# File 'opal/lib/opal/nodes/args/arity_check.rb', line 12
def initialize(*)
super
arguments = Rewriters::Arguments.new(args_node.children)
@args = arguments.args
@optargs = arguments.optargs
@restarg = arguments.restarg
@postargs = arguments.postargs
@kwargs = arguments.kwargs
@kwoptargs = arguments.kwoptargs
@kwrestarg = arguments.kwrestarg
@kwnilarg = arguments.kwnilarg
end
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Instance Method Details
#all_args ⇒ Object
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# File 'opal/lib/opal/nodes/args/arity_check.rb', line 44
def all_args
@all_args ||= [*@args, *@optargs, @restarg, *@postargs, *kwargs].compact
end
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#arity ⇒ Object
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# File 'opal/lib/opal/nodes/args/arity_check.rb', line 76
def arity
if @restarg || @optargs.any? || has_only_optional_kwargs?
negative_arity
else
positive_arity
end
end
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#arity_checks ⇒ Object
Returns an array of JS conditions for raising and argument
error caused by arity check
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# File 'opal/lib/opal/nodes/args/arity_check.rb', line 50
def arity_checks
return @arity_checks if defined?(@arity_checks)
arity = all_args.size
arity -= @optargs.size
arity -= 1 if @restarg
arity -= kwargs.size
arity = -arity - 1 if !@optargs.empty? || !kwargs.empty? || @restarg
@arity_checks = []
if arity < 0 min_arity = -(arity + 1)
max_arity = all_args.size
@arity_checks << "$arity < #{min_arity}" if min_arity > 0
@arity_checks << "$arity > #{max_arity}" unless @restarg
else
@arity_checks << "$arity !== #{arity}"
end
@arity_checks
end
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#compile ⇒ Object
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# File 'opal/lib/opal/nodes/args/arity_check.rb', line 27
def compile
scope.arity = arity
return unless compiler.arity_check?
unless arity_checks.empty?
helper :ac
meth = scope.mid.to_s.inspect
line 'var $arity = arguments.length;'
push " if (#{arity_checks.join(' || ')}) { $ac($arity, #{arity}, this, #{meth}); }"
end
end
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#has_only_optional_kwargs? ⇒ Boolean
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# File 'opal/lib/opal/nodes/args/arity_check.rb', line 109
def has_only_optional_kwargs?
kwargs.any? && kwargs.all? { |arg| %i[kwoptarg kwrestarg].include?(arg.type) }
end
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#has_required_kwargs? ⇒ Boolean
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# File 'opal/lib/opal/nodes/args/arity_check.rb', line 113
def has_required_kwargs?
kwargs.any? { |arg| arg.type == :kwarg }
end
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#kwargs ⇒ Object
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# File 'opal/lib/opal/nodes/args/arity_check.rb', line 40
def kwargs
[*@kwargs, *@kwoptargs, @kwrestarg].compact
end
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#negative_arity ⇒ Object
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# File 'opal/lib/opal/nodes/args/arity_check.rb', line 84
def negative_arity
required_plain_args = all_args.select do |arg|
%i[arg mlhs].include?(arg.type)
end
result = required_plain_args.size
if has_required_kwargs?
result += 1
end
result = -result - 1
result
end
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#positive_arity ⇒ Object
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# File 'opal/lib/opal/nodes/args/arity_check.rb', line 100
def positive_arity
result = all_args.size
result -= kwargs.size
result += 1 if kwargs.any?
result
end
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