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/*
* Definition of the structure used to build the abstract syntax tree.
*/
#ifndef __EXPRESSION_H__
#define __EXPRESSION_H__
#ifndef YY_NO_UNISTD_H
#define YY_NO_UNISTD_H 1
#endif // YY_NO_UNISTD_H
/**
* @brief The operation type
*/
typedef enum tagEOperationType
{
eVALUE,
eMULTIPLY,
ePLUS
} EOperationType;
/**
* @brief The expression structure
*/
typedef struct tagSExpression
{
EOperationType type;///< type of operation
int value;///< valid only when type is eVALUE
struct tagSExpression* left; ///< left side of the tree
struct tagSExpression* right;///< right side of the tree
} SExpression;
/**
* @brief The structure used by flex and bison
*/
typedef union tagTypeParser
{
SExpression *expression;
int value;
int ival;
float fval;
char *sval;
// class LLScriptType *type;
// class LLScriptConstant *constant;
// class LLScriptIdentifier *identifier;
// class LLScriptSimpleAssignable *assignable;
// class LLScriptGlobalVariable *global;
// class LLScriptEvent *event;
// class LLScriptEventHandler *handler;
// class LLScriptExpression *expression;
// class LLScriptStatement *statement;
// class LLScriptGlobalFunctions *global_funcs;
// class LLScriptFunctionDec *global_decl;
// class LLScriptState *state;
// class LLScritpGlobalStorage *global_store;
// class LLScriptScript *script;
}STypeParser;
// define the type for flex and bison
#define YYSTYPE STypeParser
#ifndef excludeLexer
#include "LuaSL_lexer.h"
#endif
/**
* @brief structure given as argument to the reentrant 'yyparse' function.
*/
typedef struct tagSParserParam
{
yyscan_t scanner;
SExpression *expression;
}SParserParam;
// the parameter name (of the reentrant 'yyparse' function)
// data is a pointer to a 'SParserParam' structure
#define YYPARSE_PARAM data
// the argument for the 'yylex' function
#define YYLEX_PARAM ((SParserParam*)data)->scanner
/**
* @brief It creates an identifier
* @param value The number value
* @return The expression or NULL in case of no memory
*/
SExpression* createNumber(int value);
/**
* @brief It creates an operation
* @param type The operation type
* @param left The left operand
* @param right The right operand
* @return The expression or NULL in case of no memory
*/
SExpression* createOperation(EOperationType type, SExpression *left, SExpression *right);
/**
* @brief Deletes a expression
* @param b The expression
*/
void deleteExpression(SExpression *b);
SExpression *getAST(const char *expr);
int evaluate(SExpression *e);
int yyerror(const char *msg);
int yyparse(void *param);
#include "LuaSL_yaccer.tab.h"
#endif // __EXPRESSION_H__
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