fix small string (#206)

Author: 9il

dub.sdl

@@ -1,8 +1,8 @@
 name "mir-algorithm"
-description "Mir Algorithm Collection"
+description "Dlang Core Library"
 
 authors "Ilya Yaroshenko" "Sebastian Wilzbach" "Andrei Alexandrescu and Phobos Team (original Phobos code)" "John Michael Hall"
-copyright "Copyright © 2016 - 2018, Ilya Yaroshenko; see also information per file."
+copyright "Copyright © 2016 - 2019, Ilya Yaroshenko; see also information per file."
 license "BSL-1.0"
 
 dependency "mir-core" version=">=0.3.5 <0.4.0"
@@ -24,5 +24,5 @@ configuration "default" {
 }
 
 configuration "dips" {
-dflags "-dip25" "-dip1000" "-dip1008"
+ dflags "-preview=dip1000" "-preview=dip1008"
 }

include/mir/small_string.h

@@ -23,7 +23,7 @@ namespace mir
 
  SmallString(const std::string& str) : SmallString((std::string_view)str) {}
  SmallString(const char* str) : SmallString(std::string_view(str)) {}
- std::string_view str() const noexcept { return std::string_view(_data, _data[maxLength] ? maxLength : std::strlen(_data)); }
+ std::string_view str() const noexcept { return std::string_view(_data, _data[maxLength - 1] ? maxLength : std::strlen(_data)); }
  operator std::string_view() const noexcept { return str(); }
  operator bool() const noexcept { return _data[0] != 0; }
  bool operator !() const noexcept { return _data[0] == 0; }