proc copy(s: ref MinScope): ref MinScope {.importc, extern:"copy_KGlnVwWC9c0GiqXFwLDTiww".}
proc getSymbol(scope: ref MinScope, key: string): MinOperator {.importc, extern:"getSymbol_fLEzdqSpt81S0Of5t4H9afg".}
proc hasSymbol(scope: ref MinScope, key: string): bool {.importc, extern:"hasSymbol_58ut1Z9aCNCsBFnk7k9a9cVKA".}
proc delSymbol(scope: ref MinScope, key: string): bool {.importc, extern:"delSymbol_58ut1Z9aCNCsBFnk7k9a9cVKA_2".}
proc setSymbol(scope: ref MinScope, key: string, value: MinOperator, override = false): bool {.importc, extern:"setSymbol_i9bO9b9aWD4K9c3RcQs0RqQvPw".}
proc getSigil(scope: ref MinScope, key: string): MinOperator {.importc, extern:"getSigil_fLEzdqSpt81S0Of5t4H9afg_2".}
proc hasSigil(scope: ref MinScope, key: string): bool {.importc, extern:"hasSigil_58ut1Z9aCNCsBFnk7k9a9cVKA_3".}
proc previous(scope: ref MinScope): ref MinScope {.importc, extern:"previous_wp9cZN2pi3N79at4ESdxFNVQ".}