Messages in this thread | | | From | Jiri Olsa <> | Subject | [RFC 0/4] perf expr: Add flex scanner | Date | Sat, 22 Feb 2020 00:19:31 +0100 |
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hi, while preparing changes for user defined metric expressions I also moved the expression manual parser to flex.
The reason is to have an easy and reasonable way to support and parse multiple user-defined metric expressions from command line or file.
I was posponing the change, but I just saw another update to the expr manual scanner (from Kajol Jain), so cherry picked just the expr flex code changes to get it out.
Kajol Jain, I think it should ease up your change for unknown values marked by '?'. Would you consider rebasing your changes on top of this?
Available also in: git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git perf/metric_flex
thanks, jirka
--- Jiri Olsa (4): perf expr: Add expr.c object perf expr: Move expr lexer to flex perf expr: Increase EXPR_MAX_OTHER perf expr: Straighten expr__parse/expr__find_other interface
tools/perf/tests/expr.c | 6 ++-- tools/perf/util/Build | 11 +++++++- tools/perf/util/expr.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/expr.h | 8 ++---- tools/perf/util/expr.l | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/expr.y | 185 +++++++++++++++++++++---------------------------------------------------------------------------------------------------- tools/perf/util/stat-shadow.c | 4 +-- 7 files changed, 242 insertions(+), 166 deletions(-) create mode 100644 tools/perf/util/expr.c create mode 100644 tools/perf/util/expr.l
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