100 lines
2.1 KiB
Ruby
100 lines
2.1 KiB
Ruby
module Mutant
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class Mutator
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class Node
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# Mutator for if nodes
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class If < self
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handle(:if)
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CONDITION_INDEX = 0
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IF_BRANCH_INDEX = 1
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ELSE_BRANCH_INDEX = 2
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private
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# Emit mutations
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#
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# @return [undefined]
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#
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# @api private
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#
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def dispatch
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mutate_condition
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mutate_if_branch
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mutate_else_branch
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end
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# Emit conditon mutations
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#
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# @return [undefined]
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#
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# @api private
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#
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def mutate_condition
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mutate_child(CONDITION_INDEX)
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emit_self(s(:send, condition, :!), if_branch, else_branch)
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emit_self(s(:true), if_branch, else_branch)
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emit_self(s(:false), if_branch, else_branch)
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end
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# Emit if branch mutations
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#
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# @return [undefined]
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#
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# @api private
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#
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def mutate_if_branch
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emit_self(condition, else_branch, nil) if else_branch
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if if_branch
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emit_self(condition, if_branch, nil)
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mutate_child(IF_BRANCH_INDEX)
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end
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end
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# Emit else branch mutations
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#
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# @return [undefined]
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#
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# @api private
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#
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def mutate_else_branch
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if else_branch
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mutate_child(ELSE_BRANCH_INDEX)
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emit_self(condition, nil, else_branch)
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end
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end
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# Return condition node
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#
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# @return [Parser::AST::Node]
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#
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# @api private
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#
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def condition
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children[CONDITION_INDEX]
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end
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# Return if branch
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#
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# @return [Parser::AST::Node]
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#
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# @api private
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#
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def if_branch
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children[IF_BRANCH_INDEX]
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end
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# Return else branch
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#
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# @return [Parser::AST::Node]
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#
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# @api private
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#
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def else_branch
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children[ELSE_BRANCH_INDEX]
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end
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end # If
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end # Node
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end # Mutator
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end # Mutant
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