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syncline: one line is enough

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So far we were issuing two lines for each syncline change:

  /* Line 356 of yacc.c  */
  #line 1 "src/parse-gram.y"

This is a lot of clutter, especially when reading diffs, as these
lines change often.  Fuse them into a single, shorter, line:

  #line 1 "src/parse-gram.y" /* yacc.c:356  */

* data/bison.m4 (b4_syncline): Issue a single line.
Comment improvements.
(b4_sync_start, b4_sync_end): Issue a shorter comment.
* data/c++.m4 (b4_semantic_type_declare): b4_user_code must be
on its own line as it might start with a "#line" directive.
This commit is contained in:
Akim Demaille
2012-12-28 11:25:02 +01:00
parent 258b45c86b
commit d2e3c807dc
2 changed files with 16 additions and 5 deletions
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18
data/bison.m4
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@@ -541,11 +541,21 @@ m4_define([b4_basename],
# -----------------------
m4_define([b4_syncline],
[b4_flag_if([synclines],
[b4_sync_end([__line__], [b4_basename(m4_quote(__file__))])
b4_sync_start([$1], [$2])])])
[b4_sync_start([$1], [$2]) b4_sync_end([__line__],
[b4_basename(m4_quote(__file__))])[]dnl
])])
# b4_sync_start(LINE, FILE)
# -----------------------
# Syncline for the new place. Typically a directive for the compiler.
m4_define([b4_sync_start], [b4_comment([$2:$1])])
# b4_sync_end(LINE, FILE)
# -----------------------
# Syncline for the current place, which ends. Typically a comment
# left for the reader.
m4_define([b4_sync_end], [b4_comment([$2:$1])])
m4_define([b4_sync_end], [b4_comment([Line $1 of $2])])
m4_define([b4_sync_start], [b4_comment([Line $1 of $2])])
# b4_user_code(USER-CODE)
# -----------------------