Mehdi Amini 509f181f40
[MLIR][TableGen] Fix ArrayRefParameter in struct format roundtrip (#189065)
When an ArrayRefParameter (or OptionalArrayRefParameter) appears in a
non-last position within a struct() assembly format directive, the
printed
output is ambiguous: the comma-separated array elements are
indistinguishable from the struct-level commas separating key-value
pairs.

Fix this by wrapping such parameters in square brackets in both the
generated printer and parser. The printer emits '[' before and ']' after
the array value; the parser calls parseLSquare()/parseRSquare() around
the
FieldParser call. Parameters with a custom printer or parser are
unaffected
(the user controls the format in that case).

Fixes #156623

Assisted-by: Claude Code
2026-03-27 18:41:46 +00:00
2026-01-21 23:14:07 +01:00

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