diff options
Diffstat (limited to 'libbuild2/target.hxx')
| -rw-r--r-- | libbuild2/target.hxx | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/libbuild2/target.hxx b/libbuild2/target.hxx index 411025c..1a7abfc 100644 --- a/libbuild2/target.hxx +++ b/libbuild2/target.hxx @@ -75,27 +75,48 @@ namespace build2 // // The include member normally just indicates (in the first bit) whether // this prerequisite is ad hoc. But it can also carry additional information - // (for example, from operation-specific override) in other bits. + // (for example, from operation-specific override) in other bits (see below + // for details). // struct prerequisite_target { using target_type = build2::target; prerequisite_target (const target_type* t, bool a = false, uintptr_t d = 0) - : target (t), include (a ? 1 : 0), data (d) {} + : target (t), include (a ? include_adhoc : 0), data (d) {} prerequisite_target (const target_type* t, include_type a, uintptr_t d = 0) : prerequisite_target (t, a == include_type::adhoc, d) {} + const target_type* target; + operator const target_type*& () {return target;} operator const target_type* () const {return target;} const target_type* operator-> () const {return target;} - bool adhoc () const {return (include & 1) != 0;} + // The first 8 bits are reserved with the first two having the following + // semantics: + // + // adhoc + // + // This prerequisite is ad hoc. + // + // udm + // + // This prerequisite is updated during match. Note that only static + // prerequisites that are updated during match should have this bit set + // (see dyndep_rule::*_existing_file() for details). + // + static const uintptr_t include_adhoc = 0x01; + static const uintptr_t include_udm = 0x02; - const target_type* target; - uintptr_t include; // First bit is 1 if include=adhoc. - uintptr_t data; + uintptr_t include; + + bool adhoc () const {return (include & include_adhoc) != 0;} + + // Auxiliary data. + // + uintptr_t data; }; using prerequisite_targets = vector<prerequisite_target>; |