79 lines
2.4 KiB
C++
79 lines
2.4 KiB
C++
/** @file DClosure.hpp
|
|
*
|
|
* @author Roland Conybeare, Feb 2026
|
|
**/
|
|
|
|
#pragma once
|
|
|
|
#include "LocalEnv.hpp"
|
|
#include <xo/expression2/LambdaExpr.hpp>
|
|
#include <xo/procedure2/RuntimeContext.hpp>
|
|
|
|
namespace xo {
|
|
namespace scm {
|
|
|
|
/** @brief runtime representation for a procedure
|
|
*
|
|
* Maintains lambda + captured lexical context
|
|
**/
|
|
class DClosure {
|
|
public:
|
|
using ARuntimeContext = xo::scm::ARuntimeContext;
|
|
using AAllocator = xo::mm::AAllocator;
|
|
using AGCObject = xo::mm::AGCObject;
|
|
using ppindentinfo = xo::print::ppindentinfo;
|
|
using size_type = std::int32_t;
|
|
|
|
public:
|
|
DClosure(const DLambdaExpr * lm,
|
|
const DLocalEnv * env);
|
|
|
|
/** create instance using memory from @p mm
|
|
* for lambda @p lm with captured environment @p env.
|
|
**/
|
|
static DClosure * make(obj<AAllocator> mm,
|
|
const DLambdaExpr * lm,
|
|
const DLocalEnv * env);
|
|
|
|
/** @defgroup scm-closure-general-methods **/
|
|
///@{
|
|
|
|
const DLambdaExpr * lambda() const noexcept { return lambda_; }
|
|
const DLocalEnv * env() const noexcept { return env_; }
|
|
|
|
///@}
|
|
/** @defgroup scm-closure-procedure-facet **/
|
|
///@{
|
|
|
|
/** for now, support just fixed-arity procedures **/
|
|
bool is_nary() const noexcept { return false; }
|
|
/** number of arguments expected by this procedure (-1 if nary) **/
|
|
size_type n_args() const noexcept { return lambda_->n_args(); }
|
|
|
|
obj<AGCObject> apply_nocheck(obj<ARuntimeContext> rcx, const DArray * args);
|
|
|
|
///@}
|
|
/** @defgroup scm-closure-gcobject-facet **/
|
|
///@{
|
|
|
|
///@}
|
|
/** @defgroup scm-closure-printable-facet **/
|
|
///@{
|
|
|
|
bool pretty(const ppindentinfo & ppii) const;
|
|
|
|
///@}
|
|
|
|
private:
|
|
/** lambda expression **/
|
|
const DLambdaExpr * lambda_ = nullptr;
|
|
/** bindings for captured variables
|
|
* (from lexical context where lambda evaluated)
|
|
**/
|
|
const DLocalEnv * env_ = nullptr;
|
|
};
|
|
|
|
} /*namespace scm*/
|
|
} /*namespace xo*/
|
|
|
|
/* end DClosure.hpp */
|