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// file : build/prerequisite.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#include <build/prerequisite>
#include <ostream>
#include <build/scope>
#include <build/target> // target_type
#include <build/context>
#include <build/diagnostics>
using namespace std;
namespace build
{
ostream&
operator<< (ostream& os, const prerequisite& p)
{
// Print scope unless the prerequisite's directory is absolute.
//
if (!p.dir.absolute ())
{
string s (diag_relative (p.scope.path (), false));
if (!s.empty ())
os << s << ':';
}
// If the name is empty, then we want to print the directory
// inside {}, e.g., dir{bar/}, not bar/dir{}.
//
bool n (!p.name.empty ());
string d (diag_relative (p.dir, false));
if (n)
os << d;
os << p.type.name << '{';
if (n)
{
os << p.name;
if (p.ext != nullptr && !p.ext->empty ())
os << '.' << *p.ext;
}
else
os << d;
os << '}';
return os;
}
bool
operator< (const prerequisite& x, const prerequisite& y)
{
//@@ 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
(x.type.id < y.type.id) ||
(x.type.id == y.type.id && x.name < y.name) ||
(x.type.id == y.type.id && x.name == y.name && x.dir < y.dir) ||
(x.type.id == y.type.id && x.name == y.name && x.dir == y.dir &&
x.ext != nullptr && y.ext != nullptr && x.ext < y.ext);
}
// prerequisite_set
//
auto prerequisite_set::
insert (const target_type& tt,
dir_path dir,
std::string name,
const std::string* ext,
scope& s,
tracer& trace) -> pair<prerequisite&, bool>
{
//@@ OPT: would be nice to somehow first check if this prerequisite is
// already in the set before allocating a new instance.
// Find or insert.
//
auto r (emplace (tt, move (dir), move (name), ext, s));
prerequisite& p (const_cast<prerequisite&> (*r.first));
// Update extension if the existing prerequisite has it unspecified.
//
if (p.ext != ext)
{
level4 ([&]{
diag_record r (trace);
r << "assuming prerequisite " << p << " is the same as the "
<< "one with ";
if (ext == nullptr)
r << "unspecified extension";
else if (ext->empty ())
r << "no extension";
else
r << "extension " << *ext;
});
if (ext != nullptr)
p.ext = ext;
}
return pair<prerequisite&, bool> (p, r.second);
}
}
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