4518ea9540
old system (for example, the meaning of 'a') has yet to be restored. In the new scheme, this will be done by definition a function outside of the value expression logic, rather than the tight coupling between journal innards and value expressions that occurred in 2.x.
120 lines
3.6 KiB
C++
120 lines
3.6 KiB
C++
/*
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* Copyright (c) 2003-2008, John Wiegley. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of New Artisans LLC nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _PYINTERP_H
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#define _PYINTERP_H
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#include "scope.h"
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#include <boost/python.hpp>
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#include <Python.h>
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namespace ledger {
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class python_interpreter_t
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: public noncopyable, public expr_t::symbol_scope_t
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{
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boost::python::handle<> mmodule;
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python_interpreter_t();
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public:
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boost::python::dict nspace;
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python_interpreter_t(expr_t::scope_t& parent);
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virtual ~python_interpreter_t() {
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TRACE_DTOR(python_interpreter_t);
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Py_Finalize();
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}
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boost::python::object import(const string& name);
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enum py_eval_mode_t {
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PY_EVAL_EXPR,
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PY_EVAL_STMT,
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PY_EVAL_MULTI
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};
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boost::python::object eval(std::istream& in,
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py_eval_mode_t mode = PY_EVAL_EXPR);
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boost::python::object eval(const string& str,
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py_eval_mode_t mode = PY_EVAL_EXPR);
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boost::python::object eval(const char * c_str,
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py_eval_mode_t mode = PY_EVAL_EXPR) {
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string str(c_str);
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return eval(str, mode);
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}
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class functor_t {
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functor_t();
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protected:
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boost::python::object func;
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public:
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functor_t(const string& name, boost::python::object _func) : func(_func) {
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TRACE_CTOR(functor_t, "const string&, boost::python::object");
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}
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functor_t(const functor_t& other) : func(other.func) {
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TRACE_CTOR(functor_t, "copy");
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}
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virtual ~functor_t() throw() {
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TRACE_DTOR(functor_t);
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}
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virtual value_t operator()(expr_t::call_scope_t& args);
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};
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virtual expr_t::ptr_op_t lookup(const string& name) {
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if (boost::python::object func = eval(name))
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return WRAP_FUNCTOR(functor_t(name, func));
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else
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return expr_t::symbol_scope_t::lookup(name);
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}
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class lambda_t : public functor_t {
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lambda_t();
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public:
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lambda_t(boost::python::object code) : functor_t("<lambda>", code) {
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TRACE_CTOR(functor_t, "boost::python::object");
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}
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lambda_t(const lambda_t& other) : functor_t(other) {
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TRACE_CTOR(lambda_t, "copy");
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}
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virtual ~lambda_t() throw() {
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TRACE_DTOR(lambda_t);
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}
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virtual value_t operator()(expr_t::call_scope_t& args);
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};
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};
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} // namespace ledger
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#endif // _PYINTERP_H
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