historical/toontown-classic.git/panda/include/cppBisonDefs.h
2024-01-16 11:20:27 -06:00

122 lines
3.6 KiB
C++

/**
* 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 cppBisonDefs.h
* @author drose
* @date 1999-01-17
*/
#ifndef CPPBISON_H
#define CPPBISON_H
// This header file defines the interface to the yacc (actually, bison) parser
// and grammar. None of these interfaces are intended to be used directly;
// they're defined here strictly to be used by the CPPParser and
// CPPExpressionParser classes.
#include "dtoolbase.h"
#include <string>
#include "cppClosureType.h"
#include "cppExtensionType.h"
#include "cppFile.h"
class CPPParser;
class CPPExpression;
class CPPPreprocessor;
class CPPDeclaration;
class CPPInstance;
class CPPType;
class CPPStructType;
class CPPEnumType;
class CPPSimpleType;
class CPPInstanceIdentifier;
class CPPParameterList;
class CPPTemplateParameterList;
class CPPScope;
class CPPIdentifier;
class CPPCaptureType;
void parse_cpp(CPPParser *cp);
CPPExpression *parse_const_expr(CPPPreprocessor *pp,
CPPScope *new_current_scope,
CPPScope *new_global_scope);
CPPType *parse_type(CPPPreprocessor *pp,
CPPScope *new_current_scope,
CPPScope *new_global_scope);
extern CPPScope *current_scope;
extern CPPScope *global_scope;
extern CPPPreprocessor *current_lexer;
// This structure holds the return value for each token. Traditionally, this
// is a union, and is declared with the %union declaration in the parser.y
// file, but unions are pretty worthless in C++ (you can't include an object
// that has member functions in a union), so we'll use a class instead. That
// means we need to declare it externally, here.
class cppyystype {
public:
std::string str;
union {
unsigned long long integer;
long double real;
CPPScope *scope;
CPPDeclaration *decl;
CPPInstance *instance;
CPPType *type;
CPPStructType *struct_type;
CPPEnumType *enum_type;
CPPSimpleType *simple_type;
CPPInstanceIdentifier *inst_ident;
CPPParameterList *param_list;
CPPTemplateParameterList *template_param_list;
CPPExtensionType::Type extension_enum;
CPPExpression *expr;
CPPIdentifier *identifier;
CPPClosureType *closure_type;
CPPClosureType::Capture *capture;
} u;
};
#define YYSTYPE cppyystype
// This structure takes advantage of a bison feature to track the exact
// location in the file of each token, for more useful error reporting. We
// define it up here so we can reference it in the lexer.
struct cppyyltype {
// Bison expects these members to be part of this struct.
int first_line;
int first_column;
int last_line;
int last_column;
// Early versions of bison (1.25 and earlier) expected these members to be
// in this struct as well.
int timestamp;
char *text;
// The remaining members are added for this application and have no meaning
// to bison.
CPPFile file;
};
#define YYLTYPE cppyyltype
// Beginning around bison 1.35 or so, we need to define this macro as well, to
// tell bison how to collect multiple locations together. (The default
// implementation copies only first_line through last_column, whereas here we
// use the struct assignment operator to copy all the members of the
// structure).
#define YYLLOC_DEFAULT(Current, Rhs, N) \
(Current) = (Rhs)[1]; \
(Current).last_line = (Rhs)[N].last_line; \
(Current).last_column = (Rhs)[N].last_column;
#endif