1997-02-06 wenzelm 1997-02-06 added string_of_vname' (treats neg. index as free);
1996-12-10 wenzelm 1996-12-10 tokenize: no gets exploded char list;
1996-02-16 paulson 1996-02-16 Elimination of fully-functorial style. Type tactic changed to a type abbrevation (from a datatype). Constructor tactic and function apply deleted.
1995-06-06 lcp 1995-06-06 Now string_of_vname checks for the empty variable name, catching the exception LIST.
1994-08-19 wenzelm 1994-08-19 replaced id, var, tid, tvar by idT, varT, tidT, tvarT; added const, free, var: build atomic terms of dummyT; added 'xnum' (signed numerals) and 'xstr' (strings) token kinds; various minor internal changes;
1994-05-18 wenzelm 1994-05-18 extended signature SCANNER by some basic scanners and type lexicon; various minor internal changes;
1994-04-22 clasohm 1994-04-22 changed the way a grammar is generated to allow the new parser to work; also made a lot of changes in parser.ML and minor ones elsewhere
1994-01-19 wenzelm 1994-01-19 MAJOR INTERNAL CHANGE: extend and merge operations of syntax tables now much leaner (eliminated gramgraph, all data except tables of old parser are shared); simplified the internal interfaces for syntax extension;
1993-11-29 wenzelm 1993-11-29 added SCANNER; changed scan_any: no longer uses take_prefix;
1993-10-04 wenzelm 1993-10-04 lots of internal cleaning and tuning; removed {parse,print}_{pre,post}_proc; new lexer: now human readable due to scanner combinators; new parser installed, but still inactive (due to grammar ambiguities); added Syntax.test_read; typ_of_term: sorts now made distinct and sorted; mixfix: added forced line breaks (//); PROP now printed before subterm of type prop with non-const head;
1993-09-16 clasohm 1993-09-16 Initial revision