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| author |  Peter McGoron
| 2021-07-25 23:50:50 -0400 |
|---|---|---|
| committer |  -
| 2021-07-26 22:55:45 -0400 |
| commit | 04063088250ff17e7f5f5314b6c06ddd0124769d (patch) | |
| tree | 3e6a4d63c177d1b77161a52f5830ded2f76c5762 /example/query.md | |
| parent | move SQL schema setup to variable (diff) | |
start query parser
Diffstat (limited to 'example/query.md')
| -rw-r--r-- | example/query.md | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/example/query.md b/example/query.md new file mode 100644 index 0000000..ada8638 --- /dev/null +++ b/example/query.md @@ -0,0 +1,14 @@ +Queries are passed to the command line, using the keywords OR +and NOT. Grouping is done using [ and ] (these are not reserved by +the shell). Two tildes (`~~`) at the beginning of a string denote +a glob match on tags. A tilde and a dash (`~-`) denote a glob match +on titles. + +The grammar is implemented as a recursive descent parser. + +``` +e1 ::= e2 "OR" e1 | e2; +e2 ::= e3 e2 | e3; +e3 ::= "NOT" e4 | e4; +e4 ::= TAG | "[" e1 "]"; +``` |