fix(parser): expand variables in [[ =~ $var ]] regex patterns#482
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fix(parser): expand variables in [[ =~ $var ]] regex patterns#482
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When regex pattern after =~ operator contains a variable reference ($), use parse_word() for proper expansion instead of collect_conditional_regex_pattern() which creates literal words. Literal regex patterns (without $) still use the special collector to preserve parens, backslashes, etc. Closes #400 https://claude.ai/code/session_01WZjYqxm5xMPAEe7FSHJkDy
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Summary
[[ $line =~ $var ]]regex matching where$varwas not expandedcollect_conditional_regex_pattern()createsWord::literalbypassing variable expansion$, useparse_word()for expansion; otherwise use literal collector to preserve parens/backslashesCloses #400
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