Track column numbers
Move Expression::toElem into a visitor class
Merge pull request #3253 from yebblies/exptoelem

[DDMD] [refactor] Move Expression::toElem into a visitor class
Merge pull request #3184 from 9rnsr/fix12045

Issue 12045 - Destructor call omitted for NRVO'd struct in exceptional case
Merge pull request #3077 from CyberShadow/columns

Track column numbers, add `-columns` to display them in diagnostics
fix Issue 12144 - Unresolved xopEquals when referenced by dynamic array constructor
fix Issue 12146 - Linker error with __xopCmp, __xopEq, TypeInfo
+12144