1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
// file : libbuild2/config/utility.ixx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
namespace build2
{
namespace config
{
LIBBUILD2_SYMEXPORT pair<lookup, bool>
lookup_config_impl (scope&, const variable&);
template <typename T>
pair<lookup, bool>
lookup_config_impl (scope&, const variable&, T&&, uint64_t, bool);
inline lookup
lookup_config (scope& rs, const variable& var)
{
return lookup_config_impl (rs, var).first;
}
inline lookup
lookup_config (bool& new_value, scope& rs, const variable& var)
{
auto r (lookup_config_impl (rs, var));
new_value = new_value || r.second;
return r.first;
}
template <typename T>
inline lookup
lookup_config (scope& rs,
const variable& var,
T&& def_val,
uint64_t sflags,
bool def_ovr)
{
return lookup_config_impl (rs,
var,
std::forward<T> (def_val), // VC14
sflags,
def_ovr).first;
}
template <typename T>
inline lookup
lookup_config (bool& new_value,
scope& rs,
const variable& var,
T&& def_val,
uint64_t sflags,
bool def_ovr)
{
auto r (lookup_config_impl (rs,
var,
std::forward<T> (def_val), // VC14
sflags,
def_ovr));
new_value = new_value || r.second;
return r.first;
}
}
}
|
