diff options
Diffstat (limited to 'src/backend/regex/README')
| -rw-r--r-- | src/backend/regex/README | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/backend/regex/README b/src/backend/regex/README index 5c24d3dfe9d..6c9f48315e3 100644 --- a/src/backend/regex/README +++ b/src/backend/regex/README @@ -332,10 +332,10 @@ The possible arc types are: as "$0->to_state" or "$1->to_state" for end-of-string and end-of-line constraints respectively. - LACON constraints, which represent "(?=re)" and "(?!re)" constraints, - i.e. the input starting at this point must match (or not match) a - given sub-RE, but the matching input is not consumed. These are - dumped as ":subtree_number:->to_state". + LACON constraints, which represent "(?=re)", "(?!re)", "(?<=re)", and + "(?<!re)" constraints, i.e. the input starting/ending at this point must + match (or not match) a given sub-RE, but the matching input is not + consumed. These are dumped as ":subtree_number:->to_state". If you see anything else (especially any question marks) in the display of an arc, it's dumpnfa() trying to tell you that there's something fishy |