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// file : libbuild2/build/script/runner.hxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#ifndef LIBBUILD2_BUILD_SCRIPT_RUNNER_HXX
#define LIBBUILD2_BUILD_SCRIPT_RUNNER_HXX
#include <libbuild2/types.hxx>
#include <libbuild2/utility.hxx>
#include <libbuild2/build/script/script.hxx>
namespace build2
{
namespace build
{
struct common;
namespace script
{
class runner
{
public:
// Location is the script start location (for diagnostics, etc).
//
virtual void
enter (environment&, const location&) = 0;
// Index is the 1-base index of this command line in the command list.
// If it is 0 then it means there is only one command. This
// information can be used, for example, to derive file names.
//
// Location is the start position of this command line in the script.
// It can be used in diagnostics.
//
virtual void
run (environment&,
const command_expr&,
size_t index,
const location&) = 0;
virtual bool
run_if (environment&,
const command_expr&,
size_t,
const location&) = 0;
// Location is the script end location (for diagnostics, etc).
//
virtual void
leave (environment&, const location&) = 0;
};
class default_runner: public runner
{
public:
virtual void
enter (environment&, const location&) override;
virtual void
run (environment&,
const command_expr&,
size_t,
const location&) override;
virtual bool
run_if (environment&,
const command_expr&,
size_t,
const location&) override;
virtual void
leave (environment&, const location&) override;
};
}
}
}
#endif // LIBBUILD2_BUILD_SCRIPT_RUNNER_HXX
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