minix/external/bsd/lutok/dist/stack_cleaner.hpp
Lionel Sambuc 11be35a165 Importing NetBSD "Kyua" test framework
To do so, a few dependencies have been imported:

 * external/bsd/lutok
 * external/mit/lua
 * external/public-domain/sqlite
 * external/public-domain/xz

The Kyua framework is the new generation of ATF (Automated Test
Framework), it is composed of:

 * external/bsd/atf
 * external/bsd/kyua-atf-compat
 * external/bsd/kyua-cli
 * external/bsd/kyua-tester
 * tests

Kyua/ATF being written in C++, it depends on libstdc++ which is
provided by GCC. As this is not part of the sources, Kyua is only
compiled when the native GCC utils are installed.

To install Kyua do the following:

 * In a cross-build enviromnent, add the following to the build.sh
   commandline: -V MKBINUTILS=yes -V MKGCCCMDS=yes

WARNING:
  At this point the import is still experimental, and not supported
  on native builds (a.k.a make build).

Change-Id: I26aee23c5bbd2d64adcb7c1beb98fe0d479d7ada
2013-07-23 20:43:41 +02:00

93 lines
3.2 KiB
C++

// Copyright 2011 Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
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/// \file stack_cleaner.hpp
/// Provides the stack_cleaner class.
#if !defined(LUTOK_STACK_CLEANER_HPP)
#define LUTOK_STACK_CLEANER_HPP
#include <memory>
#include <lutok/state.hpp>
namespace lutok {
/// A RAII model for values on the Lua stack.
///
/// At creation time, the object records the current depth of the Lua stack and,
/// during destruction, restores the recorded depth by popping as many stack
/// entries as required. As a corollary, the stack can only grow during the
/// lifetime of a stack_cleaner object (or shrink, but cannot become shorter
/// than the depth recorded at creation time).
///
/// Use this class as follows:
///
/// state s;
/// {
/// stack_cleaner cleaner1(s);
/// s.push_integer(3);
/// s.push_integer(5);
/// ... do stuff here ...
/// for (...) {
/// stack_cleaner cleaner2(s);
/// s.load_string("...");
/// s.pcall(0, 1, 0);
/// ... do stuff here ...
/// }
/// // cleaner2 destroyed; the result of pcall is gone.
/// }
/// // cleaner1 destroyed; the integers 3 and 5 are gone.
///
/// You must give a name to the instantiated objects even if they cannot be
/// accessed later. Otherwise, the instance will be destroyed right away and
/// will not have the desired effect.
class stack_cleaner {
struct impl;
/// Pointer to the shared internal implementation.
std::auto_ptr< impl > _pimpl;
/// Disallow copies.
stack_cleaner(const stack_cleaner&);
/// Disallow assignment.
stack_cleaner& operator=(const stack_cleaner&);
public:
stack_cleaner(state&);
~stack_cleaner(void);
void forget(void);
};
} // namespace lutok
#endif // !defined(LUTOK_STACK_CLEANER_HPP)