Track column numbers
fix Issue 12045 - Destructor call omitted for NRVO'd struct in exceptional case
Use Visitor for correct AST rewriting and CTFE interpretation
[Refactoring] Do return exp tweaking also in NrvoWalker
fix Issue 10929 - [CTFE] Destructor errornously gets called on NRVO-ed structs?
Move Expression::toElem into a visitor class
Tweak white spaces surrounding ddoc comments
fix Issue 7555 - ddoc whitespace issues due to version tags
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
Merge pull request #3254 from 9rnsr/fix7555

Issue 7555 - ddoc whitespace issues due to version tags