Use in API and utilities WKT2_2019 instead of WKT2_2018 (fixes #1518)

- C API: PJ_GUESSED_WKT2_2019 is added, PJ_GUESSED_WKT2_2018 aliased to it
- C API: PJ_WKT2_2019[_SIMPLIFIED] is added, PJ_WKT2_2018[_SIMPLIFIED] alias to it
- C++ API: similarly for WKTFormatter::Convention::WKT2_2019[_SIMPLIFIED]
Those above changes should be fully backward API and ABI compatible.

projinfo changes:
- accept WKT2_2019 as value for -o switch. WKT2_2018 is still accepted (undocumented)
- output now uses 'WKT2_2019 string:', so might break scripts that would rely on that.

Other internal code references to WKT2_2018 changes to WKT2_2019, included
in tests.

1 files changed, 5 insertions, 5 deletions

diff --git a/src/iso19111/datum.cpp b/src/iso19111/datum.cpp
index 65905ca9..fffdc022 100644
--- a/src/iso19111/datum.cpp
+++ b/src/iso19111/datum.cpp
@@ -1416,7 +1416,7 @@ void DynamicGeodeticReferenceFrame::_exportToWKT(
     io::WKTFormatter *formatter) const // throw(FormattingException)
 {
     const bool isWKT2 = formatter->version() == io::WKTFormatter::Version::WKT2;
-    if (isWKT2 && formatter->use2018Keywords()) {
+    if (isWKT2 && formatter->use2019Keywords()) {
         formatter->startNode(io::WKTConstants::DYNAMIC, false);
         formatter->startNode(io::WKTConstants::FRAMEEPOCH, false);
         formatter->add(
@@ -1530,9 +1530,9 @@ void DatumEnsemble::_exportToWKT(
     io::WKTFormatter *formatter) const // throw(FormattingException)
 {
     const bool isWKT2 = formatter->version() == io::WKTFormatter::Version::WKT2;
-    if (!isWKT2 || !formatter->use2018Keywords()) {
+    if (!isWKT2 || !formatter->use2019Keywords()) {
         throw io::FormattingException(
-            "DatumEnsemble can only be exported to WKT2:2018");
+            "DatumEnsemble can only be exported to WKT2:2019");
     }
 
     auto l_datums = datums();
@@ -1941,7 +1941,7 @@ void DynamicVerticalReferenceFrame::_exportToWKT(
     io::WKTFormatter *formatter) const // throw(FormattingException)
 {
     const bool isWKT2 = formatter->version() == io::WKTFormatter::Version::WKT2;
-    if (isWKT2 && formatter->use2018Keywords()) {
+    if (isWKT2 && formatter->use2019Keywords()) {
         formatter->startNode(io::WKTConstants::DYNAMIC, false);
         formatter->startNode(io::WKTConstants::FRAMEEPOCH, false);
         formatter->add(
@@ -2067,7 +2067,7 @@ void TemporalDatum::_exportToWKT(
     }
     formatter->startNode(io::WKTConstants::TDATUM, !identifiers().empty());
     formatter->addQuotedString(nameStr());
-    if (formatter->use2018Keywords()) {
+    if (formatter->use2019Keywords()) {
         formatter->startNode(io::WKTConstants::CALENDAR, false);
         formatter->addQuotedString(calendar());
         formatter->endNode();