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Both existing `DefaultAsFlagParsingStrategy` strategies can consume a following argument, so a `defaultAsFlag` option placed before a positional argument took that argument as its value. The new `.attached` strategy accepts a value only when attached to the option, following the GNU `getopt_long` convention for optional arguments: - `--opt` uses the `defaultAsFlag` value and never consumes the next argument - `--opt=value` uses `value`, and `--opt=` uses the empty string - a short name that allows joined values also accepts `-ovalue` An invalid attached value is reported as an error instead of falling back to the `defaultAsFlag` value. Help renders such an option as `--opt[=<value>]`, error messages as `--opt=<value>`, and `dump-help` records its parsing strategy as `attached`. Completion scripts complete it as a flag, since the next word is never its value. Resolves apple#992. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Signed-off-by: Ross Goldberg <484615+rgoldberg@users.noreply.github.com>
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Fix tool tests for Swift Build.
Resolve #995
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