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Provide convenience constructors for locations and positions.

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* data/location.cc (position::position): Accept file, line and
	column as arguments with default values.
	Always qualify initial line and column literals as unsigned.
	(location::location): Provide convenience constructors.
This commit is contained in:
Akim Demaille
2008-09-23 13:49:41 +02:00
parent fe1b448ada
commit 0634493cdd
2 changed files with 40 additions and 12 deletions
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44
data/location.cc
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@@ -42,29 +42,33 @@ b4_copyright([Positions for Bison parsers in C++])[
class position
{
public:
]m4_ifdef([b4_location_constructors], [
]m4_ifdef([b4_location_constructors], [[
/// Construct a position.
position ()
: filename (0), line (]b4_location_initial_line[), column (]b4_location_initial_column[)
explicit position (]b4_percent_define_get([[filename_type]])[* f = 0,
unsigned int l = ]b4_location_initial_line[u,
unsigned int c = ]b4_location_initial_column[u)
: filename (f)
, line (l)
, column (c)
{
}
])[
]])[
/// Initialization.
inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
{
filename = fn;
line = ]b4_location_initial_line[;
column = ]b4_location_initial_column[;
line = ]b4_location_initial_line[u;
column = ]b4_location_initial_column[u;
}
/** \name Line and Column related manipulators
** \{ */
public:
/// (line related) Advance to the COUNT next lines.
/// Set current column to initial value.
inline void lines (int count = 1)
{
column = ]b4_location_initial_column[;
column = ]b4_location_initial_column[u;
line += count;
}
@@ -75,7 +79,6 @@ b4_copyright([Positions for Bison parsers in C++])[
}
/** \} */
public:
/// File name to which this position refers.
]b4_percent_define_get([[filename_type]])[* filename;
/// Current line number.
@@ -167,9 +170,26 @@ b4_copyright([Locations for Bison parsers in C++])[
{
public:
]m4_ifdef([b4_location_constructors], [
/// Construct a location.
location ()
: begin (), end ()
/// Construct a location from \a b to \a e.
location (const position& b, const position& e)
: begin (b)
, end (e)
{
}
/// Construct a 0-width location in \a p.
explicit location (const position& p = position ())
: begin (p)
, end (p)
{
}
/// Construct a 0-width location in \a f, \a l, \a c.
explicit location (]b4_percent_define_get([[filename_type]])[* f,
unsigned int l = ]b4_location_initial_line[u,
unsigned int c = ]b4_location_initial_column[u)
: begin (f, l, c)
, end (f, l, c)
{
}