rust-lang/rust — pull request #17576 by kmcallister (2014-09-27 00:30:25+00:00)
Title: Hide the quote_*! macros when the feature gate is off

This makes it easier to experiment with improved quasiquoting as an ordinary plugin library.

The list of quote macros in feature_gate.rs was already out of sync; this commit also prevents that problem in the future.