add constexpr constructor

Signed-off-by: Rosen Penev <[email protected]>

Author: neheb

src/tags.cpp

@@ -20,28 +20,28 @@ using namespace Internal;
 
 //! List of all defined Exif sections.
 constexpr auto sectionInfo = std::array{
-    SectionInfo{sectionIdNotSet, "(UnknownSection)", N_("Unknown section")},
-    SectionInfo{imgStruct, "ImageStructure", N_("Image data structure")},
-    SectionInfo{recOffset, "RecordingOffset", N_("Recording offset")},
-    SectionInfo{imgCharacter, "ImageCharacteristics", N_("Image data characteristics")},
-    SectionInfo{otherTags, "OtherTags", N_("Other data")},
-    SectionInfo{exifFormat, "ExifFormat", N_("Exif data structure")},
-    SectionInfo{exifVersion, "ExifVersion", N_("Exif version")},
-    SectionInfo{imgConfig, "ImageConfig", N_("Image configuration")},
-    SectionInfo{userInfo, "UserInfo", N_("User information")},
-    SectionInfo{relatedFile, "RelatedFile", N_("Related file")},
-    SectionInfo{dateTime, "DateTime", N_("Date and time")},
-    SectionInfo{captureCond, "CaptureConditions", N_("Picture taking conditions")},
-    SectionInfo{gpsTags, "GPS", N_("GPS information")},
-    SectionInfo{iopTags, "Interoperability", N_("Interoperability information")},
-    SectionInfo{mpfTags, "MPF", N_("CIPA Multi-Picture Format")},
-    SectionInfo{makerTags, "Makernote", N_("Vendor specific information")},
-    SectionInfo{dngTags, "DngTags", N_("Adobe DNG tags")},
-    SectionInfo{panaRaw, "PanasonicRaw", N_("Panasonic RAW tags")},
-    SectionInfo{tiffEp, "TIFF/EP", N_("TIFF/EP tags")},
-    SectionInfo{tiffPm6, "TIFF&PM6", N_("TIFF PageMaker 6.0 tags")},
-    SectionInfo{adobeOpi, "AdobeOPI", N_("Adobe OPI tags")},
-    SectionInfo{lastSectionId, "(LastSection)", N_("Last section")},
+    SectionInfo(sectionIdNotSet, "(UnknownSection)", N_("Unknown section")),
+    SectionInfo(imgStruct, "ImageStructure", N_("Image data structure")),
+    SectionInfo(recOffset, "RecordingOffset", N_("Recording offset")),
+    SectionInfo(imgCharacter, "ImageCharacteristics", N_("Image data characteristics")),
+    SectionInfo(otherTags, "OtherTags", N_("Other data")),
+    SectionInfo(exifFormat, "ExifFormat", N_("Exif data structure")),
+    SectionInfo(exifVersion, "ExifVersion", N_("Exif version")),
+    SectionInfo(imgConfig, "ImageConfig", N_("Image configuration")),
+    SectionInfo(userInfo, "UserInfo", N_("User information")),
+    SectionInfo(relatedFile, "RelatedFile", N_("Related file")),
+    SectionInfo(dateTime, "DateTime", N_("Date and time")),
+    SectionInfo(captureCond, "CaptureConditions", N_("Picture taking conditions")),
+    SectionInfo(gpsTags, "GPS", N_("GPS information")),
+    SectionInfo(iopTags, "Interoperability", N_("Interoperability information")),
+    SectionInfo(mpfTags, "MPF", N_("CIPA Multi-Picture Format")),
+    SectionInfo(makerTags, "Makernote", N_("Vendor specific information")),
+    SectionInfo(dngTags, "DngTags", N_("Adobe DNG tags")),
+    SectionInfo(panaRaw, "PanasonicRaw", N_("Panasonic RAW tags")),
+    SectionInfo(tiffEp, "TIFF/EP", N_("TIFF/EP tags")),
+    SectionInfo(tiffPm6, "TIFF&PM6", N_("TIFF PageMaker 6.0 tags")),
+    SectionInfo(adobeOpi, "AdobeOPI", N_("Adobe OPI tags")),
+    SectionInfo(lastSectionId, "(LastSection)", N_("Last section")),
 };
 
 }  // namespace Exiv2

src/tags_int.hpp

@@ -190,6 +190,9 @@ enum SectionId {
 
 //! The details of a section.
 struct SectionInfo {
+  constexpr SectionInfo(SectionId sectionId, const char* name, const char* desc) :
+      sectionId_(sectionId), name_(name), desc_(desc) {
+  }
   SectionId sectionId_;  //!< Section id
   const char* name_;     //!< Section name (one word)
   const char* desc_;     //!< Section description