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// file : libbuild2/bin/rule.hxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#ifndef LIBBUILD2_BIN_RULE_HXX
#define LIBBUILD2_BIN_RULE_HXX
#include <libbuild2/types.hxx>
#include <libbuild2/utility.hxx>
#include <libbuild2/rule.hxx>
#include <libbuild2/bin/export.hxx>
namespace build2
{
namespace bin
{
// "Fail rule" for obj{} and [h]bmi{} that issues diagnostics if someone
// tries to build these groups directly.
//
class obj_rule: public simple_rule
{
public:
obj_rule () {}
virtual bool
match (action, target&) const override;
virtual recipe
apply (action, target&) const override;
};
// If metadata is false, the this is a "fail rule" for libul{} that issues
// diagnostics if someone tries to build this group directly.
//
// If metadata is true, then this rule only matches with the explicit
// `bin.metadata` hint. In this case it picks, matches, and unmatches (if
// possible) a member for the purpose of making its metadata (for example,
// library's poptions, if it's one of the cc libraries) available.
//
// The underlying idea here is that someone else (e.g., cc::link_rule)
// makes a more informed choice and we piggy back on that decision,
// falling back to making our own based on bin.lib and bin.exe.lib. Note
// that for update this rule always returns target_state::unchanged.
//
class libul_rule: public rule
{
public:
explicit
libul_rule (bool md): metadata_ (md) {}
virtual bool
match (action, target&, const string&, match_extra&) const override;
virtual recipe
apply (action, target&, match_extra&) const override;
private:
bool metadata_;
};
// Pass-through to group members rule, similar to alias.
//
class LIBBUILD2_BIN_SYMEXPORT lib_rule: public simple_rule
{
public:
lib_rule () {}
virtual bool
match (action, target&) const override;
virtual recipe
apply (action, target&) const override;
static target_state
perform (action, const target&);
};
}
}
#endif // LIBBUILD2_BIN_RULE_HXX
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