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Add string slicing support (#2639)

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* Initial plan

* Add string slicing support to yq

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* Fix sliceStringNode signature and fix test descriptions/expressions

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* Update pkg/yqlib/operator_slice.go

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Fix array slice out-of-bounds panic with very negative indices

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* S2-S4: tighten lexer condition, fix doc header, add Unicode example

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* Fix spelling: multibyte -> multi-byte in Unicode test subdescription

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---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: mikefarah <1151925+mikefarah@users.noreply.github.com>
Co-authored-by: Mike Farah <mikefarah@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
Copilot
2026-04-06 19:29:07 +10:00
committed by GitHub
co-authored by mikefarah Copilot copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Mike Farah
parent 68f0322ba3
commit 3b2423e871
7 changed files with 203 additions and 10 deletions
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pkg/yqlib/lexer.go
+5
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@@ -131,6 +131,11 @@ func handleToken(tokens []*token, index int, postProcessedTokens []*token) (toke
log.Debugf("previous token is : traverseArrayOpType")
// need to put the number 0 before this token, as that is implied
postProcessedTokens = append(postProcessedTokens, &token{TokenType: operationToken, Operation: createValueOperation(0, "0")})
} else if index >= 2 && tokens[index-1].TokenType == openCollect &&
(tokens[index-2].TokenType == operationToken || tokens[index-2].TokenType == closeCollect || tokens[index-2].TokenType == closeCollectObject) {
log.Debugf("previous token is : openCollect following a traversal, implying 0 start")
// need to put the number 0 before this token, as that is implied
postProcessedTokens = append(postProcessedTokens, &token{TokenType: operationToken, Operation: createValueOperation(0, "0")})
}
}