55 enum class Legality { never, always, formerly };  enum
61 constexpr Legality IsLegalDoTerm(const parser::Statement<A> &) {  in IsLegalDoTerm()
64     return Legality::always;  in IsLegalDoTerm()
70     return Legality::formerly;  in IsLegalDoTerm()
72     return Legality::never;  in IsLegalDoTerm()
76 constexpr Legality IsLegalDoTerm(  in IsLegalDoTerm()
80     return Legality::always;  in IsLegalDoTerm()
95     return Legality::formerly;  in IsLegalDoTerm()
97     return Legality::never;  in IsLegalDoTerm()
106 constexpr Legality IsLegalBranchTarget(const parser::Statement<A> &) {  in IsLegalBranchTarget()
130     return Legality::always;  in IsLegalBranchTarget()
132     return Legality::never;  in IsLegalBranchTarget()
140   if (IsLegalDoTerm(statement) == Legality::always) {  in ConstructBranchTargetFlags()
142   } else if (IsLegalDoTerm(statement) == Legality::formerly) {  in ConstructBranchTargetFlags()
145   if (IsLegalBranchTarget(statement) == Legality::always) {  in ConstructBranchTargetFlags()
147   } else if (IsLegalBranchTarget(statement) == Legality::formerly) {  in ConstructBranchTargetFlags()