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switch parameter to an std::variant

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plus fix mem leak & move constructor for zstrings
This commit is contained in:
Nuno Lopes 2021-05-23 13:07:29 +01:00
parent 9eb566b401
commit f8406623b4
2 changed files with 68 additions and 96 deletions
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95
src/ast/ast.h
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@ -47,6 +47,7 @@ Revision History:
#include "util/z3_exception.h"
#include "util/dependency.h"
#include "util/rlimit.h"
#include <variant>
#define RECYCLE_FREE_AST_INDICES
@ -97,6 +98,7 @@ const family_id arith_family_id = 5;
*/
class parameter {
public:
// NOTE: these must be in the same order as the entries in the variant below
enum kind_t {
PARAM_INT,
PARAM_AST,
@ -113,63 +115,50 @@ public:
PARAM_EXTERNAL
};
private:
kind_t m_kind;
// It is not possible to use tag pointers, since symbols are already tagged.
union {
int m_int; // for PARAM_INT
ast* m_ast; // for PARAM_AST
symbol m_symbol; // for PARAM_SYMBOL
rational* m_rational; // for PARAM_RATIONAL
zstring* m_zstring; // for PARAM_ZSTRING
double m_dval; // for PARAM_DOUBLE (remark: this is not used in float_decl_plugin)
unsigned m_ext_id; // for PARAM_EXTERNAL
};
std::variant<
int, // for PARAM_INT
ast*, // for PARAM_AST
symbol, // for PARAM_SYMBOL
zstring*, // for PARAM_ZSTRING
rational*, // for PARAM_RATIONAL
double, // for PARAM_DOUBLE (remark: this is not used in float_decl_plugin)
unsigned // for PARAM_EXTERNAL
> m_val;
public:
parameter(): m_kind(PARAM_INT), m_int(0) {}
explicit parameter(int val): m_kind(PARAM_INT), m_int(val) {}
explicit parameter(unsigned val): m_kind(PARAM_INT), m_int(val) {}
explicit parameter(ast * p): m_kind(PARAM_AST), m_ast(p) {}
explicit parameter(symbol const & s): m_kind(PARAM_SYMBOL), m_symbol(s) {}
explicit parameter(rational const & r): m_kind(PARAM_RATIONAL), m_rational(alloc(rational, r)) {}
explicit parameter(rational && r) : m_kind(PARAM_RATIONAL), m_rational(alloc(rational, std::move(r))) {}
explicit parameter(zstring const& s): m_kind(PARAM_ZSTRING), m_zstring(alloc(zstring, s)) {}
explicit parameter(zstring && s): m_kind(PARAM_ZSTRING), m_zstring(alloc(zstring, std::move(s))) {}
explicit parameter(double d):m_kind(PARAM_DOUBLE), m_dval(d) {}
explicit parameter(const char *s):m_kind(PARAM_SYMBOL), m_symbol(symbol(s)) {}
explicit parameter(const std::string &s):m_kind(PARAM_SYMBOL), m_symbol(symbol(s)) {}
explicit parameter(unsigned ext_id, bool):m_kind(PARAM_EXTERNAL), m_ext_id(ext_id) {}
parameter(parameter const&);
parameter() : m_val(0) {}
explicit parameter(int val): m_val(val) {}
explicit parameter(unsigned val): m_val((int)val) {}
explicit parameter(ast * p): m_val(p) {}
explicit parameter(symbol const & s): m_val(s) {}
explicit parameter(rational const & r): m_val(alloc(rational, r)) {}
explicit parameter(rational && r) : m_val(alloc(rational, std::move(r))) {}
explicit parameter(zstring const& s): m_val(alloc(zstring, s)) {}
explicit parameter(zstring && s): m_val(alloc(zstring, std::move(s))) {}
explicit parameter(double d): m_val(d) {}
explicit parameter(const char *s): m_val(symbol(s)) {}
explicit parameter(const std::string &s): m_val(symbol(s)) {}
explicit parameter(unsigned ext_id, bool): m_val(ext_id) {}
parameter(parameter const& other) { *this = other; }
parameter(parameter && other) noexcept : m_kind(other.m_kind) {
switch (other.m_kind) {
case PARAM_INT: m_int = other.get_int(); break;
case PARAM_AST: m_ast = other.get_ast(); break;
case PARAM_SYMBOL: m_symbol = other.m_symbol; break;
case PARAM_RATIONAL: m_rational = nullptr; std::swap(m_rational, other.m_rational); break;
case PARAM_DOUBLE: m_dval = other.m_dval; break;
case PARAM_EXTERNAL: m_ext_id = other.m_ext_id; break;
case PARAM_ZSTRING: m_zstring = other.m_zstring; break;
default:
UNREACHABLE();
break;
}
parameter(parameter && other) noexcept : m_val(std::move(other.m_val)) {
other.m_val = 0;
}
~parameter();
parameter& operator=(parameter const& other);
kind_t get_kind() const { return m_kind; }
bool is_int() const { return m_kind == PARAM_INT; }
bool is_ast() const { return m_kind == PARAM_AST; }
bool is_symbol() const { return m_kind == PARAM_SYMBOL; }
bool is_rational() const { return m_kind == PARAM_RATIONAL; }
bool is_double() const { return m_kind == PARAM_DOUBLE; }
bool is_external() const { return m_kind == PARAM_EXTERNAL; }
bool is_zstring() const { return m_kind == PARAM_ZSTRING; }
kind_t get_kind() const { return static_cast<kind_t>(m_val.index()); }
bool is_int() const { return get_kind() == PARAM_INT; }
bool is_ast() const { return get_kind() == PARAM_AST; }
bool is_symbol() const { return get_kind() == PARAM_SYMBOL; }
bool is_rational() const { return get_kind() == PARAM_RATIONAL; }
bool is_double() const { return get_kind() == PARAM_DOUBLE; }
bool is_external() const { return get_kind() == PARAM_EXTERNAL; }
bool is_zstring() const { return get_kind() == PARAM_ZSTRING; }
bool is_int(int & i) const { return is_int() && (i = get_int(), true); }
bool is_ast(ast * & a) const { return is_ast() && (a = get_ast(), true); }
@ -191,13 +180,13 @@ public:
*/
void del_eh(ast_manager & m, family_id fid);
int get_int() const { SASSERT(is_int()); return m_int; }
ast * get_ast() const { SASSERT(is_ast()); return m_ast; }
symbol get_symbol() const { SASSERT(is_symbol()); return m_symbol; }
rational const & get_rational() const { SASSERT(is_rational()); return *m_rational; }
zstring const& get_zstring() const { SASSERT(is_zstring()); return *m_zstring; }
double get_double() const { SASSERT(is_double()); return m_dval; }
unsigned get_ext_id() const { SASSERT(is_external()); return m_ext_id; }
int get_int() const { return std::get<int>(m_val); }
ast * get_ast() const { return std::get<ast*>(m_val); }
symbol get_symbol() const { return std::get<symbol>(m_val); }
rational const & get_rational() const { return *std::get<rational*>(m_val); }
zstring const& get_zstring() const { return *std::get<zstring*>(m_val); }
double get_double() const { return std::get<double>(m_val); }
unsigned get_ext_id() const { return std::get<unsigned>(m_val); }
bool operator==(parameter const & p) const;
bool operator!=(parameter const & p) const { return !operator==(p); }