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Refuse an empty #if condition and a multi-line directive argument [patch] - #155
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…tch] DirectiveScope wrote its condition verbatim, so an empty, null or whitespace condition produced a bare "#if" (CS1517), and a condition with a line break left the rest of the expression outside the directive as code. PragmaScope had the same line-break problem with its warning list, including a single entry of the IEnumerable overload that kept a stray CR. Both now throw ArgumentException before writing anything, using the same LineTerminators check RegionScope got in #152. PragmaScope still treats empty or whitespace warnings as a no-op. Fixes #154 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_017vfJW2yWAiM4Xm9iHUvALj
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Fixes #154
What changed
DirectiveScopethrowsArgumentExceptionbefore writing anything when the condition is null, empty or whitespace. That case used to write a bare#if(CS1517). It also throws when the condition contains a line terminator.PragmaScopethrowsArgumentExceptionbefore writing anything when the warning list contains a line terminator. One check covers both constructors, because theIEnumerable<string>overload joins its entries first. Empty or whitespace warnings are still a no-op.LineTerminatorshelper thatRegionScopegot in Comment every line of a multi-line copyright, and refuse a multi-line region name [patch] #152 (LF, CRLF, CR, NEL, U+2028, U+2029).Tests
ScopesTests:DirectiveScopeRejectsAMissingConditionBeforeWriting(empty, whitespace, null),DirectiveScopeRejectsAConditionThatSpansLinesBeforeWritingandPragmaScopeRejectsWarningsThatSpanLinesBeforeWriting(each of the six terminators, bothPragmaScopeconstructors). Each one also asserts that nothing was written.Scopes.csreverted, all 15 new cases fail. With the fix, the full suite passes: 264 of 264 on net10.0, Linux, includingPragmaScopeWithAnEmptyStringIsANoOp.Note: releases are still blocked by #153 (pack fails package validation), so this won't reach NuGet until that is fixed.
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