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# File 'lib/rbs/prototype/node_usage.rb', line 25
def calculate(node, conditional:)
if conditional
conditional_nodes << node
end
case node.type
when :IF, :UNLESS
cond_node, true_node, false_node = node.children
calculate(cond_node, conditional: true)
calculate(true_node, conditional: conditional) if true_node
calculate(false_node, conditional: conditional) if false_node
when :AND, :OR
left, right = node.children
calculate(left, conditional: true)
calculate(right, conditional: conditional)
when :QCALL
receiver, _, args = node.children
calculate(receiver, conditional: true)
calculate(args, conditional: false) if args
when :WHILE
cond, body = node.children
calculate(cond, conditional: true)
calculate(body, conditional: false) if body
when :OP_ASGN_OR, :OP_ASGN_AND
var, _, asgn = node.children
calculate(var, conditional: true)
calculate(asgn, conditional: conditional)
when :LASGN, :IASGN, :GASGN
_, lhs = node.children
calculate(lhs, conditional: conditional) if lhs
when :MASGN
lhs, _ = node.children
calculate(lhs, conditional: conditional)
when :CDECL
if node.children.size == 2
_, lhs = node.children
calculate(lhs, conditional: conditional)
else
const, _, lhs = node.children
calculate(const, conditional: false)
calculate(lhs, conditional: conditional)
end
when :SCOPE
_, _, body = node.children
calculate(body, conditional: conditional)
when :CASE2
_, *branches = node.children
branches.each do |branch|
if branch.type == :WHEN
list, body = branch.children
list.children.each do |child|
if child
calculate(child, conditional: true)
end
end
calculate(body, conditional: conditional)
else
calculate(branch, conditional: conditional)
end
end
when :BLOCK
*nodes, last = node.children
nodes.each do |no|
calculate(no, conditional: false)
end
calculate(last, conditional: conditional) if last
else
each_child(node) do |child|
calculate(child, conditional: false)
end
end
end
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