1.1 --- a/lemon/concepts/maps.h	Mon Jan 12 23:11:39 2009 +0100
     1.2 +++ b/lemon/concepts/maps.h	Thu Nov 05 15:48:01 2009 +0100
     1.3 @@ -16,8 +16,8 @@
     1.4   *
     1.5   */
     1.6  
     1.7 -#ifndef LEMON_CONCEPT_MAPS_H
     1.8 -#define LEMON_CONCEPT_MAPS_H
     1.9 +#ifndef LEMON_CONCEPTS_MAPS_H
    1.10 +#define LEMON_CONCEPTS_MAPS_H
    1.11  
    1.12  #include <lemon/core.h>
    1.13  #include <lemon/concept_check.h>
    1.14 @@ -182,7 +182,8 @@
    1.15  
    1.16        template<typename _ReferenceMap>
    1.17        struct Constraints {
    1.18 -        void constraints() {
    1.19 +        typename enable_if<typename _ReferenceMap::ReferenceMapTag, void>::type
    1.20 +        constraints() {
    1.21            checkConcept<ReadWriteMap<K, T>, _ReferenceMap >();
    1.22            ref = m[key];
    1.23            m[key] = val;
    1.24 @@ -213,4 +214,4 @@
    1.25  
    1.26  } //namespace lemon
    1.27  
    1.28 -#endif // LEMON_CONCEPT_MAPS_H
    1.29 +#endif