Extend Options' inputs validation#152
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quinnj merged 1 commit intoJuliaData:mainfrom Jan 4, 2023
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## main #152 +/- ##
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Drvi
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Nov 15, 2022
| quoted && (isempty(oq) || isempty(cq) || isempty(e)) && throw(ArgumentError("quoted=true requires openquotechar, closequotechar, and escapechar to be specified")) | ||
| sent = (sentinel === nothing || sentinel === missing) ? Token[] : map(x -> token(x, "sentinel"), prepare!(sentinel)) | ||
| checksentinel = sentinel !== nothing | ||
| quoted && ((_match(openquotechar, delim) || _match(closequotechar, delim)) || _match(escapechar, delim)) && |
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Hmm, maybe the check should be about having a common prefix rather than equality?
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quinnj
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Upon review of Parsers.Options validations ([ref](JuliaData/Parsers.jl#152)), @nickrobinson251, @Drvi, and I agree that this shouldn't be valid. The problem is that there's an ambiguity in the case of a _missing_ field vs. an empty quoted field vs. a quoted field with newlines. For example: ```julia a"b"c 1"2"3 # normal row "2"3 # 1st field is missing, but ambiguous with 1st field as quoted `"2"` "1""2"3 # Also ambiguous because the 2nd quote escapes the 3rd, so value is `1"2` ```
quinnj
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Upon review of Parsers.Options validations ([ref](JuliaData/Parsers.jl#152)), @nickrobinson251, @Drvi, and I agree that this shouldn't be valid. The problem is that there's an ambiguity in the case of a _missing_ field vs. an empty quoted field vs. a quoted field with newlines. For example: ```julia a"b"c 1"2"3 # normal row "2"3 # 1st field is missing, but ambiguous with 1st field as quoted `"2"` "1""2"3 # Also ambiguous because the 2nd quote escapes the 3rd, so value is `1"2` ```
quinnj
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quinnj
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Jan 12, 2026
Upon review of Parsers.Options validations ([ref](JuliaData/Parsers.jl#152)), @nickrobinson251, @Drvi, and I agree that this shouldn't be valid. The problem is that there's an ambiguity in the case of a _missing_ field vs. an empty quoted field vs. a quoted field with newlines. For example: ```julia a"b"c 1"2"3 # normal row "2"3 # 1st field is missing, but ambiguous with 1st field as quoted `"2"` "1""2"3 # Also ambiguous because the 2nd quote escapes the 3rd, so value is `1"2` ```
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This generalizes the compatibility checks between
escapechar,openquotechar,closequotechar,delimand the sentinel values. We still fail to correctly validate pairs of regular expressions as those would have to be somehow reduced to their minimal canonical form (I'm sure there is a fancy CS name for this).