49 enum class Legality { never, always, formerly };  enum
55 constexpr Legality IsLegalDoTerm(const parser::Statement<A> &) {  in IsLegalDoTerm()
58     return Legality::always;  in IsLegalDoTerm()
64     return Legality::formerly;  in IsLegalDoTerm()
66     return Legality::never;  in IsLegalDoTerm()
70 constexpr Legality IsLegalDoTerm(  in IsLegalDoTerm()
74     return Legality::always;  in IsLegalDoTerm()
89     return Legality::formerly;  in IsLegalDoTerm()
91     return Legality::never;  in IsLegalDoTerm()
100 constexpr Legality IsLegalBranchTarget(const parser::Statement<A> &) {  in IsLegalBranchTarget()
125     return Legality::always;  in IsLegalBranchTarget()
127     return Legality::never;  in IsLegalBranchTarget()
135   if (IsLegalDoTerm(statement) == Legality::always) {  in ConstructBranchTargetFlags()
137   } else if (IsLegalDoTerm(statement) == Legality::formerly) {  in ConstructBranchTargetFlags()
140   if (IsLegalBranchTarget(statement) == Legality::always) {  in ConstructBranchTargetFlags()
142   } else if (IsLegalBranchTarget(statement) == Legality::formerly) {  in ConstructBranchTargetFlags()