> On 13 Dec 2019, at 03:00, Freeman Gilmore <freeman.gilm...@gmail.com> wrote: > >> On Thu, Dec 12, 2019 at 4:40 PM Hans Åberg <haber...@telia.com> wrote: >> >> > On 12 Dec 2019, at 22:32, Freeman Gilmore <freeman.gilm...@gmail.com> >> > wrote: >> > >> >> On Thu, Dec 12, 2019 at 3:01 PM Hans Åberg <haber...@telia.com> wrote: >> >> >> >> > On 12 Dec 2019, at 14:01, Freeman Gilmore <freeman.gilm...@gmail.com> >> >> > wrote: >> >> > >> >> > I would like to understand how it work, if i can. >> >> >> >> There is a lexer generated from a file lexer.ll by Flex, which divides >> >> the input stream into tokens, which are handed over to a parser generated >> >> from a file parser.yy by Bison. >> > >> > 0k that helps. The lexer looks like what i an looking for I think at >> > this point; and from what you said. I have the lexer.ll, parser.yy and >> > ly_grammar.txt files. Now I need to finger out what part of the lexer >> > code reads the note event. >> >> Check out the Bison manual, which also has a C++ calculator example with >> sources in the distribution. One can generate a file .output from the .yy >> file which contains all processing of the grammar would it be needed. Use >> flex 2.5.37, because the C++ lexer in 2.6* is broken. > > I do not know if i can do this but I will look in to it. Flex is new to me > today. .
In the lexer.ll file, you might search for the rules with a “return” in them, as that is how the yylex function turns over the tokens to the parser. The Flex manual describes the rules syntax.
