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// file : build/target-key -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#ifndef BUILD_TARGET_KEY
#define BUILD_TARGET_KEY
#include <string>
#include <typeindex>
#include <ostream>
#include <build/types>
namespace build
{
class scope;
class target;
class target_key;
class prerequisite_key;
// Target type.
//
struct target_type
{
std::type_index id;
const char* name;
const target_type* base;
target* (*const factory) (dir_path, std::string, const std::string*);
const std::string& (*const extension) (const target_key&, scope&);
target* (*const search) (const prerequisite_key&);
bool
is_a (const std::type_index&) const; // Defined in target.cxx
template <typename T>
bool
is_a () const {return is_a (typeid (T));}
};
inline std::ostream&
operator<< (std::ostream& os, const target_type& tt)
{
return os << tt.name;
}
// Light-weight (by being shallow-pointing) target key.
//
class target_key
{
public:
mutable const target_type* type;
mutable const dir_path* dir;
mutable const std::string* name;
mutable const std::string* const* ext; // Note only *ext can be NULL.
friend bool
operator< (const target_key& x, const target_key& y)
{
const std::type_index& xt (x.type->id);
const std::type_index& yt (y.type->id);
//@@ TODO: use compare() to compare once.
// Unspecified and specified extension are assumed equal. The
// extension strings are from the pool, so we can just compare
// pointers.
//
return
(xt < yt) ||
(xt == yt && *x.name < *y.name) ||
(xt == yt && *x.name == *y.name && *x.dir < *y.dir) ||
(xt == yt && *x.name == *y.name && *x.dir == *y.dir &&
*x.ext != nullptr && *y.ext != nullptr && **x.ext < **y.ext);
}
};
std::ostream&
operator<< (std::ostream&, const target_key&); // Defined in target.cxx
}
#endif // BUILD_TARGET_KEY
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