%token NAME NUMBER
%left '+' '-'
%left '*' '/'
%right POWOP 
%right ASSIGNOP
%right '?' ':'
%left ','
%%

computation : statement computation
            | /* empty */
            ;

statement : expr ';'
          | assignment ';'
          | ';'
          ;


expr : '(' expr ')'
     | expr '+' expr
     | expr '-' expr
     | expr '*' expr
     | expr '/' expr
     | expr POWOP expr
     | expr '?' expr ':' expr
     | expr ',' expr
     | assignment
     | NAME
     | NUMBER
     ;


assignment : NAME ASSIGNOP expr ;