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<p>Just added the assignment to _ to master.</p>
<p>Thank you for the fix.</p>
<p>Still having problems building master?</p>
<p>On 2018-11-01 10:12, Damian Gryski wrote:</p>
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<div>This is with ragel 7.0.0.11 and colm 0.13.0.6. I was unable to get ragel to build from git.</div>
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<div dir="ltr">With the example grammar at <a style="text-decoration-line: none; color: #4285f4;" href="http://github.com/dgryski/ragel-examples/regexp1">github.com/dgryski/ragel-examples/regexp1</a>, I get the following error:</div>
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<div dir="ltr">$ ragel-go sshd.rl</div>
<div dir="ltr">$ go build</div>
<div dir="ltr"># <a style="text-decoration-line: none; color: #4285f4;" href="http://github.com/dgryski/ragel-examples/regexp1">github.com/dgryski/ragel-examples/regexp1</a></div>
<div dir="ltr">./sshd.go:11:6: _scanner_trans_cond_spaces declared and not used</div>
<div dir="ltr">./sshd.go:12:6: _scanner_trans_offsets declared and not used</div>
<div dir="ltr">./sshd.go:13:6: _scanner_trans_lengths declared and not used</div>
<div dir="ltr">./sshd.go:14:6: _scanner_cond_keys declared and not used</div>
<div dir="ltr">./sshd.go:17:6: _scanner_eof_cond_spaces declared and not used</div>
<div dir="ltr">./sshd.go:18:6: _scanner_eof_cond_key_offs declared and not used</div>
<div dir="ltr">./sshd.go:19:6: _scanner_eof_cond_key_lens declared and not used</div>
<div dir="ltr">./sshd.go:20:6: _scanner_eof_cond_keys declared and not used</div>
<div dir="ltr">./sshd.go:21:6: _scanner_nfa_targs declared and not used</div>
<div dir="ltr">./sshd.go:22:6: _scanner_nfa_offsets declared and not used</div>
<div dir="ltr">./sshd.go:22:6: too many errors</div>
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<div dir="ltr">The usual solution to this in autogenerated code is to assign them to `_`, the underscore "blank variable". This satisfies the compiler and the entire array will be eliminated as a dead-store if it ends up not being used.</div>
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<div>Thus, each declaration for variables which may or may not be used will look like:</div>
<div>var _scanner_trans_cond_spaces [] int8 = [] int8 { ... }</div>
<div>_ = _scanner_trans_cond_space</div>
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<div>Note also the first `[] int8` is redundant -- the compiler will infer the type from the type of the array on the right hand side of the `=`.</div>
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<div dir="auto">Fixing these issues in the Go template in the src/host-go directory and rebuilding fixed these errors (although I had to copy files from the git checkout for the template changes to recompile successfully).</div>
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<div dir="auto">Damian</div>
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