src/Pure/Thy/rail.ML
2012-08-23 wenzelm 2012-08-23 tuned messages: end-of-input rarely means physical end-of-file from the past;
2012-08-10 wenzelm 2012-08-10 proper error prefixes;
2011-07-23 wenzelm 2011-07-23 defer evaluation of Scan.message, for improved performance in the frequent situation where failure is handled later (e.g. via ||);
2011-06-27 wenzelm 2011-06-27 document antiquotations are managed as theory data, with proper name space and entity markup;
2011-05-03 wenzelm 2011-05-03 proper treatment of empty name -- avoid excessive vertical space;
2011-05-03 wenzelm 2011-05-03 more precise source position for @{rail};
2011-05-01 wenzelm 2011-05-01 treat @ as separate keyword; added @'text' for \isakeyword markup;
2011-04-30 wenzelm 2011-04-30 allow nested @{antiq} (nonterminal) and @@{antiq} terminal;
2011-04-30 wenzelm 2011-04-30 tuned;
2011-04-30 wenzelm 2011-04-30 more robust error handling (NB: Source.source requires total scanner or recover); tuned;
2011-04-30 wenzelm 2011-04-30 railroad diagrams in LaTeX as document antiquotation;