On Fri, Dec 8, 2017 at 2:30 AM, Hans Åberg <haber...@telia.com> wrote: > > >> On 7 Dec 2017, at 21:14, Harsha Sharma <harshasharmai...@gmail.com> wrote: >> >> On Fri, Dec 8, 2017 at 1:17 AM, Hans Åberg <haber...@telia.com> wrote: >>> >>>> On 7 Dec 2017, at 18:59, Harsha Sharma <harshasharmai...@gmail.com> wrote: >>>> >>>> I'm looking for a way to parse input string and input file (pushing >>>> buffer state created with yy_scan_string to buffer state created with >>>> yy_create_buffer to parse input file). It either causes segmentation >>>> fault or parses either the string or the input file. >>> >>> The string pointed to (in a lexer generated by Flex) must be copied before >>> passed on elsewhere, as it is just a pointer in a buffer, temporarily >>> null-terminated. >>> >> This is what I'm exactly trying to do . > > In the .l file, the string pointed to by yytext of length yyleng must be > copied. Does it do that? > The string is copied to variable "variable". This is the code -- b = yy_scan_string(variable, scanner); /* variable is the string to be parsed */ temp = yy_create_buffer(f, YY_BUF_SIZE, scanner); /* f is the file to be parsed */ yypush_buffer_state(temp, scanner);
This causes segmentation fault. I want to parse both the string and file. >> I have a string passed from >> command line which needs to be parsed 'define test="foo"' and input >> file references this variable. >> Same thing can be done by prepending this line in input file 'define >> test="foo"' but I want to have a command line option for the same. > > Can you read the input as a stream instead of first putting it into a string? > Preferably not as I want only a part of input from command line. Thanks for your reply. Regards, Harsha Sharma > _______________________________________________ help-bison@gnu.org https://lists.gnu.org/mailman/listinfo/help-bison
