historical/toontown-classic.git/panda/include/cppExpression.h

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/**
* PANDA 3D SOFTWARE
* Copyright (c) Carnegie Mellon University. All rights reserved.
*
* All use of this software is subject to the terms of the revised BSD
* license. You should have received a copy of this license along
* with this source code in a file named "LICENSE."
*
* @file cppExpression.h
* @author drose
* @date 1999-10-25
*/
#ifndef CPPEXPRESSION_H
#define CPPEXPRESSION_H
#include "dtoolbase.h"
#include "cppDeclaration.h"
class CPPIdentifier;
class CPPType;
class CPPPreprocessor;
class CPPFunctionGroup;
/**
*
*/
class CPPExpression : public CPPDeclaration {
public:
enum Type {
T_nullptr,
T_boolean,
T_integer,
T_real,
T_string,
T_wstring,
T_u8string,
T_u16string,
T_u32string,
T_variable,
T_function,
T_unknown_ident,
T_typecast,
T_static_cast,
T_dynamic_cast,
T_const_cast,
T_reinterpret_cast,
T_construct,
T_default_construct,
T_aggregate_init,
T_empty_aggregate_init,
T_new,
T_default_new,
T_sizeof,
T_sizeof_ellipsis,
T_alignof,
T_unary_operation,
T_binary_operation,
T_trinary_operation,
T_literal,
T_raw_literal,
T_typeid_type,
T_typeid_expr,
T_type_trait,
T_lambda,
// These are used when parsing =default and =delete methods.
T_default,
T_delete,
};
CPPExpression(bool value);
CPPExpression(unsigned long long value);
CPPExpression(int value);
CPPExpression(const std::string &value);
CPPExpression(long double value);
CPPExpression(CPPIdentifier *ident, CPPScope *current_scope,
CPPScope *global_scope, CPPPreprocessor *error_sink = nullptr);
CPPExpression(int unary_operator, CPPExpression *op1);
CPPExpression(int binary_operator, CPPExpression *op1, CPPExpression *op2);
CPPExpression(int trinary_operator, CPPExpression *op1, CPPExpression *op2, CPPExpression *op3);
static CPPExpression typecast_op(CPPType *type, CPPExpression *op1, Type cast_type = T_typecast);
static CPPExpression construct_op(CPPType *type, CPPExpression *op1);
static CPPExpression aggregate_init_op(CPPType *type, CPPExpression *op1);
static CPPExpression new_op(CPPType *type, CPPExpression *op1 = nullptr);
static CPPExpression typeid_op(CPPType *type, CPPType *std_type_info);
static CPPExpression typeid_op(CPPExpression *op1, CPPType *std_type_info);
static CPPExpression type_trait(int trait, CPPType *type, CPPType *arg = nullptr);
static CPPExpression sizeof_func(CPPType *type);
static CPPExpression sizeof_ellipsis_func(CPPIdentifier *ident);
static CPPExpression alignof_func(CPPType *type);
static CPPExpression lambda(CPPClosureType *type);
static CPPExpression literal(unsigned long long value, CPPInstance *lit_op);
static CPPExpression literal(long double value, CPPInstance *lit_op);
static CPPExpression literal(CPPExpression *value, CPPInstance *lit_op);
static CPPExpression raw_literal(const std::string &raw, CPPInstance *lit_op);
static const CPPExpression &get_nullptr();
static const CPPExpression &get_default();
static const CPPExpression &get_delete();
enum ResultType {
RT_integer,
RT_real,
RT_pointer,
RT_error
};
class Result {
public:
Result();
Result(int value);
Result(double value);
Result(void *value);
int as_integer() const;
double as_real() const;
void *as_pointer() const;
bool as_boolean() const;
void output(std::ostream &out) const;
ResultType _type;
union {
int _integer;
double _real;
void *_pointer;
} _u;
};
Result evaluate() const;
CPPType *determine_type() const;
bool is_lvalue() const;
bool is_tbd() const;
virtual bool is_fully_specified() const;
virtual CPPDeclaration *substitute_decl(SubstDecl &subst,
CPPScope *current_scope,
CPPScope *global_scope);
virtual void output(std::ostream &out, int indent_level, CPPScope *scope,
bool complete) const;
virtual SubType get_subtype() const;
virtual CPPExpression *as_expression();
Type _type;
std::string _str;
union {
bool _boolean;
unsigned long long _integer;
long double _real;
CPPInstance *_variable;
CPPFunctionGroup *_fgroup;
CPPIdentifier *_ident;
CPPClosureType *_closure_type;
struct {
union {
CPPType *_type;
CPPExpression *_expr;
};
CPPType *_std_type_info;
} _typeid;
struct {
CPPType *_to;
CPPExpression *_op1;
} _typecast;
struct {
// One of the yytoken values: a character, or something like EQCOMPARE.
int _operator;
CPPExpression *_op1;
CPPExpression *_op2;
CPPExpression *_op3;
} _op;
struct {
CPPInstance *_operator;
CPPExpression *_value;
} _literal;
struct {
int _trait;
CPPType *_type;
CPPType *_arg;
} _type_trait;
} _u;
protected:
static CPPType *elevate_type(CPPType *t1, CPPType *t2);
virtual bool is_equal(const CPPDeclaration *other) const;
virtual bool is_less(const CPPDeclaration *other) const;
};
inline std::ostream &
operator << (std::ostream &out, const CPPExpression::Result &result) {
result.output(out);
return out;
}
#endif