UGameEngine/UGameEngine/utils/parser-wavefront-obj.y

%{
/*#include <QtGui>*/
#include <QVariant>
#include <QDebug>
#include "utils/wavefrontobj.h"
#include "lexer-wavefront-obj.h"



// yylex is a function generated by Flex and we must tell to Bison that it is
// defined in other place.
extern int wavefront_objlex(void);

// Bison uses the yyerror function for informing us when a parsing error has
// occurred.
void wavefront_objerror(const char *s);
%}

%define api.prefix {wavefront_obj}
%define api.token.prefix {TOK_}

// Here we define our custom variable types.
// Custom types must be of fixed size.
%union {
    float number;
    char* string;
    void* wavefront;
}

// Define the terminal expression types.
%token <float_number> NUMBER
%token <string> STRING
%token SLASH
%token MTLLIB
%token USEMTL
%token O
%token V
%token VT
%token VN
%token VP
%token F
%token S

// Define the non-terminal expression types.
%type <wavefront> wavefront_obj

%%

start: wavefront_obj {
/*    qDebug() << $1;*/
};

wavefront_obj: stmt_list {
                  }
                ;


stmt_list: {}
            | stmt_list stmt {};

stmt: mtllib {}
            | usemtl {}
            | named_object {}
            | vertex {}
            | texture_coordinate {}
            | vertex_normal {}
            | vertex_space {}
            | face {}
            | smooth {};

mtllib: MTLLIB STRING {};

usemtl: USEMTL STRING {};

named_object: O STRING {};

vertex: V NUMBER NUMBER NUMBER {}
            | V NUMBER NUMBER NUMBER NUMBER {};

texture_coordinate: VT NUMBER NUMBER {}
            | VT NUMBER NUMBER NUMBER {};

vertex_normal: VN NUMBER NUMBER NUMBER {};

vertex_space: VP NUMBER NUMBER NUMBER {};

face: F face_vertex_list {};

face_vertex_list: {}
            | face_vertex_list face_vertex {};

face_vertex: NUMBER {}
            | NUMBER SLASH NUMBER {}
            | NUMBER SLASH NUMBER SLASH NUMBER {}
            | NUMBER SLASH SLASH NUMBER {};

smooth: S NUMBER {}
            | S STRING {};

%%

void wavefront_objerror(const char *s)
{
    qDebug() << "parse error:" << s << "at line" << wavefront_objlineno << "at" << wavefront_objtext;
}