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c++: fix several issues with locations

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Reported by Daniel Frużyński.
http://lists.gnu.org/archive/html/bug-bison/2013-02/msg00000.html

* data/location.cc (position::columns, position::lines): Check for
underflow.
Fix some weird function signatures.
(location): Accept signed integers as arguments where appropriate.
Add operator- and operator+=.
* doc/bison.texi (C++ position, C++ location): Various fixes
and completion.
* tests/c++.at (C++ Locations): New tests.
This commit is contained in:
Akim Demaille
2013-04-11 09:53:18 +02:00
parent 08cc1a3b18
commit 75ae829984
5 changed files with 119 additions and 31 deletions
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18
doc/bison.texi
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@@ -10591,16 +10591,18 @@ filename_type "@var{type}"}.
The line, starting at 1.
@end deftypeivar
@deftypemethod {position} {uint} lines (int @var{height} = 1)
Advance by @var{height} lines, resetting the column number.
@deftypemethod {position} {void} lines (int @var{height} = 1)
If @var{height} is not null, advance by @var{height} lines, resetting the
column number. The resulting line number cannot be less than 1.
@end deftypemethod
@deftypeivar {position} {uint} column
The column, starting at 1.
@end deftypeivar
@deftypemethod {position} {uint} columns (int @var{width} = 1)
Advance by @var{width} columns, without changing the line number.
@deftypemethod {position} {void} columns (int @var{width} = 1)
Advance by @var{width} columns, without changing the line number. The
resulting column number cannot be less than 1.
@end deftypemethod
@deftypemethod {position} {position&} operator+= (int @var{width})
@@ -10642,14 +10644,16 @@ Reset the location to an empty range at the given values.
The first, inclusive, position of the range, and the first beyond.
@end deftypeivar
@deftypemethod {location} {uint} columns (int @var{width} = 1)
@deftypemethodx {location} {uint} lines (int @var{height} = 1)
Advance the @code{end} position.
@deftypemethod {location} {void} columns (int @var{width} = 1)
@deftypemethodx {location} {void} lines (int @var{height} = 1)
Forwarded to the @code{end} position.
@end deftypemethod
@deftypemethod {location} {location} operator+ (const location& @var{end})
@deftypemethodx {location} {location} operator+ (int @var{width})
@deftypemethodx {location} {location} operator+= (int @var{width})
@deftypemethodx {location} {location} operator- (int @var{width})
@deftypemethodx {location} {location} operator-= (int @var{width})
Various forms of syntactic sugar.
@end deftypemethod