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Sort: Delegate UDA string sorting to Variant::operator<

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This commit is contained in:
Paul Beckingham 2015-04-04 12:53:06 -04:00
parent 8c0f46309b
commit 370afa0d26
1 changed files with 11 additions and 6 deletions
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17
src/sort.cpp
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@ -30,6 +30,7 @@
#include <string>
#include <stdlib.h>
#include <Context.h>
#include <Variant.h>
#include <Duration.h>
#include <Task.h>
#include <text.h>
@ -67,6 +68,7 @@ void sort_tasks (
// require re-parsing.
//
// Essentially a static implementation of a dynamic operator<.
// UDA string values delegate to Variant::operator<.
static bool sort_compare (int left, int right)
{
std::string field;
@ -245,16 +247,19 @@ static bool sort_compare (int left, int right)
return ascending ? (left_real < right_real)
: (left_real > right_real);
}
// UDA values of type 'string' are sorted by Variant::operator<.
// By setting 'source' to the UDA name, the comparison operator can use
// the custom sort order, if defined.
else if (type == "string")
{
const std::string& left_string = (*global_data)[left].get_ref (field);
const std::string& right_string = (*global_data)[right].get_ref (field);
if (left_string == right_string)
Variant l ((*global_data)[left].get_ref (field));
Variant r ((*global_data)[right].get_ref (field));
if (l == r)
continue;
return ascending ? (left_string < right_string)
: (left_string > right_string);
l.source (field);
r.source (field);
return ascending ? (l < r) : (r < l);
}
else if (type == "date")
{