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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 <utility> // move()
#include <build/path>
#include <build/token>
#include <build/name>
#include <build/spec>
#include <build/variable> // list_value
#include <build/diagnostics>
namespace build
{
class scope;
class target;
class lexer;
class parser
{
public:
parser (): fail (&path_) {}
// Issue diagnostics and throw failed in case of an error.
//
void
parse_buildfile (std::istream&, const path&, scope& root, scope& base);
buildspec
parse_buildspec (std::istream&, const std::string& name);
token
parse_variable (lexer&, scope&, std::string name, token_type kind);
list_value
export_value ()
{
list_value r (std::move (export_value_));
export_value_.clear (); // Empty state.
return r;
}
// 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&);
void
import (token&, token_type&);
void
export_ (token&, token_type&);
void
using_ (token&, token_type&);
void
variable (token&, token_type&, std::string name, token_type kind);
std::string
variable_name (names_type&&, const location&);
names_type
names (token& t, token_type& tt)
{
names_type ns;
names (t, tt, ns, 0, nullptr, nullptr);
return ns;
}
void
names (token&, token_type&,
names_type&, std::size_t pair,
const dir_path* dir, const std::string* type);
// Buildspec.
//
buildspec
buildspec_clause (token&, token_type&, token_type end);
// Utilities.
//
private:
// Switch to new root scope and return the previous one.
//
scope*
switch_root (scope*);
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 diag_relative().
lexer* lexer_;
target* target_; // Current target, if any.
scope* scope_; // Current base scope (out_base).
scope* root_; // Current root scope (out_root).
const dir_path* out_root_;
const dir_path* src_root_;
target* default_target_;
list_value export_value_;
token peek_ {token_type::eos, false, 0, 0};
bool peeked_ {false};
};
}
#endif // BUILD_PARSER
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