Add FilterBar query language parser (pest grammar)

Introduces a standalone src/filter_parser.rs module (no dependency on
engine/index types) that parses the FilterBar query language into a
FilterExpr AST using a pest grammar (src/filter_parser.pest). Supports
regex("...") searches, metric_name[param] <op> value comparisons,
reserved sequence/timestamp metrics, and and/or combinators with
correct precedence (and binds tighter than or) and parenthesized
sub-expressions. Evaluation against real log data is left to a later
integration ticket.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XFUNZwCvz3kcod3352ZR2o

This commit is contained in:

Hugh Kaznowski

2026-09-05 12:45:31 +01:00

co-authored by

Claude Sonnet 5

parent 1fb564d06b

commit 202b1dcf9f

5 changed files with 489 additions and 3 deletions

									
										src/main.rs
									
		+1
		
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				@@ -2,6 +2,7 @@ mod api;

				mod data_value;

				mod dto;

				mod engine;

				mod filter_parser;

				mod index_key;

				mod ingest;

				mod metric_primitive;