diff options
author | Boris Kolpackov <boris@codesynthesis.com> | 2018-06-28 09:44:15 +0200 |
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committer | Boris Kolpackov <boris@codesynthesis.com> | 2018-06-28 09:44:15 +0200 |
commit | 3cc5e3bd441fc9d18fece3d9e99fae75c78438e7 (patch) | |
tree | a9a08c453370847e0d352d47e19fbfcb7cc757ef /build2/variable.ixx | |
parent | c0f72d47fc25981dcc1f55e12dfa0fdba7b70242 (diff) |
Implement support for excluded and ad hoc prerequisites
The inclusion/exclusion is controlled via the 'include' prerequisite-specific
variable. Valid values are:
false - exclude
true - include
adhoc - include but treat as an ad hoc input
For example:
lib{foo}: cxx{win32-utility}: include = ($cxx.targe.class == 'windows')
exe{bar}: libs{plugin}: include = adhoc
Diffstat (limited to 'build2/variable.ixx')
-rw-r--r-- | build2/variable.ixx | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/build2/variable.ixx b/build2/variable.ixx index 953bc86..991556a 100644 --- a/build2/variable.ixx +++ b/build2/variable.ixx @@ -201,6 +201,20 @@ namespace build2 template <typename T> inline T + cast_default (const value& v, const T& d) + { + return v ? cast<T> (v) : d; + } + + template <typename T> + inline T + cast_default (const lookup& l, const T& d) + { + return l ? cast<T> (l) : d; + } + + template <typename T> + inline T cast_false (const value& v) { return v && cast<T> (v); |