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// file : build2/in/rule.hxx -*- C++ -*-
// copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#ifndef BUILD2_IN_RULE_HXX
#define BUILD2_IN_RULE_HXX
#include <build2/types.hxx>
#include <build2/utility.hxx>
#include <build2/rule.hxx>
namespace build2
{
namespace in
{
// Preprocess an .in file.
//
class rule: public build2::rule
{
public:
rule () {}
virtual bool
match (action, target&, const string&) const override;
virtual recipe
apply (action, target&) const override;
// Perform variable lookup.
//
virtual string
lookup (const location&, const target&, const string& name) const;
// Perform variable substitution. Return nullopt if it should be
// ignored.
//
virtual optional<string>
substitute (const location&,
const target&,
const string& name,
bool strict) const;
target_state
perform_update (action, const target&) const;
};
}
}
#endif // BUILD2_IN_RULE_HXX
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