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// file : build/parser -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#ifndef BUILD_PARSER
#define BUILD_PARSER
#include <string>
#include <iosfwd>
#include <unordered_set>
#include <build/path>
#include <build/token>
#include <build/name>
#include <build/diagnostics>
namespace build
{
class scope;
class target;
class lexer;
class parser
{
public:
parser (): fail (&path_) {}
// Issues diagnostics and throws failed in case of an error.
//
void
parse (std::istream&, const path&, scope&);
// Recursive descent parser.
//
private:
typedef build::names names_type;
void
clause (token&, token_type&);
void
print (token&, token_type&);
void
source (token&, token_type&);
void
include (token&, token_type&);
names_type
names (token& t, token_type& tt)
{
names_type ns;
names (t, tt, ns, nullptr, nullptr);
return ns;
}
void
names (token&, token_type&, names_type&,
const path* dir, const std::string* type);
// Utilities.
//
private:
void
process_default_target (token&);
// Lexer.
//
private:
token_type
next (token&, token_type&);
token_type
peek ();
const token&
peeked () const
{
assert (peeked_);
return peek_;
}
// Diagnostics.
//
private:
const fail_mark<failed> fail;
private:
const std::string* path_; // Path processed by diagnostic_string().
lexer* lexer_;
scope* scope_;
target* default_target_;
const path* out_root_;
const path* src_root_;
token peek_ {token_type::eos, false, 0, 0};
bool peeked_ {false};
std::unordered_set<path> include_;
};
}
#endif // BUILD_PARSER
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