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no-lines: avoid leaving an empty line instead of the syncline

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Currently, with --no-lines, instead of "#line file line\n", we emit
"\n".  Let's emit nothing.

* data/skeletons/bison.m4 (b4_syncline): Emit at end-of-line when enabled.
* data/skeletons/bison.m4, data/skeletons/c.m4, data/skeletons/glr.cc,
* data/skeletons/lalr1.cc, src/output.c: Use dnl after b4_syncline to
avoid spurious empty lines.

* tests/synclines.at (Sync Lines): Make sure that --no-lines is like
grep -v #line.
* tests/calc.at: Make sure that a rich grammar file behaves properly
with %no-lines.
This commit is contained in:
Akim Demaille
2019-04-01 18:23:20 +02:00
parent 9832fdd6ef
commit 0f193d2d21
11 changed files with 71 additions and 37 deletions
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6
data/skeletons/c++.m4
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@@ -147,13 +147,13 @@ m4_if(m4_bregexp(b4_namespace_ref, [::[ ]*$]), [-1], [],
[[namespace reference has a trailing "::"]])])
m4_define([b4_namespace_open],
[b4_user_code([b4_percent_define_get_syncline([[api.namespace]])
[b4_user_code([b4_percent_define_get_syncline([[api.namespace]])dnl
[namespace ]m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref),
[^\(.\)[ ]*::], [\1])),
[::], [ { namespace ])[ {]])])
m4_define([b4_namespace_close],
[b4_user_code([b4_percent_define_get_syncline([[api.namespace]])
[b4_user_code([b4_percent_define_get_syncline([[api.namespace]])dnl
m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref[ ]),
[^\(.\)[ ]*\(::\)?\([^][:]\|:[^:]\)*],
[\1])),
@@ -194,7 +194,7 @@ m4_define([b4_value_type_declare],
[union\|union-directive],
[[ union semantic_type
{
]b4_user_union_members[
]b4_user_union_members[
};]])])dnl
])