Horton

Re: pure parsers and reentrant scanners

Peter Eisentraut <peter@eisentraut.org>

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From: Peter Eisentraut <peter@eisentraut.org>
To: pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2025-01-17T15:40:54Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Return yyparse() result not via global variable

  2. Remove flex version checks

  3. Drop warning-free support for Flex 2.5.35

  4. plpgsql: pure parser and reentrant scanner

  5. flex code modernization: Replace YY_EXTRA_TYPE define with flex option

  6. guc: reentrant scanner

  7. jsonpath scanner: reentrant scanner

  8. syncrep parser: pure parser and reentrant scanner

  9. replication parser: pure parser and reentrant scanner

  10. bootstrap: pure parser and reentrant scanner

  11. Small whitespace improvement

  12. Prevent redeclaration of typedef yyscan_t

  13. seg: pure parser and reentrant scanner

  14. cube: pure parser and reentrant scanner

Attachments

Here are some more patches.  This should cover the last sub-topic of 
this topic: not passing the yyparse() result via global variables.  This 
uses techniques that are already in use in some parsers in the tree, for 
example cube and jsonpath.  The syncrep parser was a bit trickier, 
because there we need to pass the syncrep_parse_error variable all the 
way down to the scanner (not just the parser), but overall it's all 
still pretty compact and standard.