On 8/31/18, Warren Young <[email protected]> wrote: > They’re separate. Here’s the Tcl source for the bubble diagrams: > > https://www.sqlite.org/docsrc/file/?name=art/syntax/bubble-generator-data.tcl > > …and here’s the Lemon grammar for SQLite’s SQL parser: > > https://www.sqlite.org/src/file?name=src/parse.y >
The parse.y file is designed to generate a fast parser automaton. The bubble-generator-data.tcl file is designed to generate output that is easily understandable by humans. These two files are therefore at cross-purposes. One little-noticed aspect of SQLite that the source code to the LALR(1) parser generator (Lemon) is included in the source tree. The fact that SQLite uses its own parser generator, rather than relying yacc/bison or similar, has proven very helpful over the years. We've been able to add features, fix bugs, and make optimizations to the parser that would not have been possible had we been dependent on an outside tool. -- D. Richard Hipp [email protected] _______________________________________________ sqlite-users mailing list [email protected] http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
