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1505100.y
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1505100.y
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%{
#include<iostream>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include "SymbolTable.h"
using namespace std;
int yyparse(void);
int yylex(void);
int label_cnt, var_cnt, scope_cnt;
extern FILE *yyin;
extern int line_count;
extern int error_count;
FILE *logout, *errorout, *code;
vector <tree_node*> node;
vector <string> program_vec, ls;
string type_name, ret_type, asm_code, str, variable, func_name;
symbolTable table(10);
functionTable functable;
string get_label()
{
string temp;
char var[5];
sprintf(var, "%d", label_cnt++);
temp = "L";
temp += var;
return temp;
}
string get_temp_var()
{
string temp;
char var[5];
sprintf(var, "%d", var_cnt++);
temp = "t";
temp += var;
return temp;
}
string get_scope_cnt(int cnt)
{
string temp;
char var[5];
sprintf(var, "%d", cnt);
temp += var;
return temp;
}
void yyerror(const char *s)
{
++error_count;
fprintf(errorout, "At line : %d %s\n\n", line_count, s);
}
tree_node* get_node()
{
tree_node *temp = new tree_node();
return temp;
}
tree_node* info_node(symbolInfo *inf)
{
tree_node *temp = get_node();
temp->str = inf->get_name();
temp->type = inf->get_type();
temp->line_num = inf->line_num;
return temp;
}
void var_insert(string name, string type, string var_type)
{
}
symbolInfo *var_cur_search(string name)
{
}
symbolInfo *var_search(string name)
{
}
%}
%union {
int ival;
double dval;
symbolInfo *symbol;
tree_node *node;
}
%token <symbol> IF ELSE FOR WHILE DO BREAK INT CHAR FLOAT DOUBLE VOID RETURN SWITCH CASE DEFAULT CONTINUE ASSIGNOP INCOP DECOP NOT LPAREN RPAREN LCURL RCURL LTHIRD RTHIRD COMMA SEMICOLON COMMENT PRINTLN
%token <symbol> CONST_INT CONST_FLOAT CONST_CHAR STRING ID ADDOP MULOP RELOP LOGICOP BITOP
%type <node> func_declaration func_definition unit program go_to_scope go
%type <node> declaration_list parameter_list argument_list arguments variable type_specifier
%type <node> expression unary_expression logic_expression rel_expression simple_expression term factor
%type <node> statements statement compound_statement expression_statement var_declaration
%nonassoc LOWER_THAN_ELSE
%nonassoc ELSE
%define parse.error verbose
%%
start : program
;
program : program unit
{
}
| unit
{
}
;
unit : var_declaration
{
asm_code += $1->code;
}
| func_declaration
{
ls.clear();
}
| func_definition
{
ls.clear();
asm_code += $1->code;
}
;
func_declaration : type_specifier ID LPAREN parameter_list RPAREN SEMICOLON
{
bool mark = false;
table.enter_scope();
$$ = get_node();
$$->line_num = $1->line_num;
for (int i = 0; i < $4->vec.size(); ++i)
{
if ($4->vec[i]->str.size())
{
if (table.cur_look_up($4->vec[i]->str))
++error_count, fprintf(logout, "At line no : %d redeclaration of parameter\n\n", $4->vec[i]->line_num);
else
table.insert($4->vec[i]->str, "ID", $4->vec[i]->type);
}
}
func_node *temp = new func_node();
if (table.look_up($2->get_name()))
++error_count, fprintf(logout, "At line no : %d redeclaration of variable\n\n", $2->line_num);
else if (functable.is_declared($2->get_name()))
++error_count, fprintf(logout, "At line no : %d redeclaration of function\n\n", $2->line_num);
else if (functable.is_defined($2->get_name()))
++error_count, fprintf(logout, "At line no : %d function has already defined\n\n", $2->line_num);
else
{
temp->name = $2->get_name();
temp->type = $1->str;
for (int i = 0; i < $4->vec.size(); ++i)
temp->vec.push_back($4->vec[i]->type);
mark = true;
}
table.exit_scope();
if (mark)
{
functable.insert_dec(temp);
table.insert($2->get_name(), $2->get_type(), $1->str);
}
}
| type_specifier ID LPAREN RPAREN SEMICOLON
{
bool mark = false;
table.enter_scope();
$$ = get_node();
$$->line_num = $1->line_num;
func_node *temp = new func_node();
if (table.look_up($2->get_name()))
++error_count, fprintf(logout, "At line no : %d redeclaration of variable\n\n", $2->line_num);
else if (functable.is_declared($2->get_name()))
++error_count, fprintf(logout, "At line no : %d redeclaration of function\n\n", $2->line_num);
else if (functable.is_defined($2->get_name()))
++error_count, fprintf(logout, "At line no : %d function has already defined\n\n", $2->line_num);
else
temp->name = $2->get_name(), temp->type = $1->str, mark = true;
table.exit_scope();
if (mark)
{
functable.insert_dec(temp);
table.insert($2->get_name(), $2->get_type(), $1->str);
}
}
;
func_definition : go_to_scope compound_statement
{
bool mark = false;
bool isdefine = false;
$$ = get_node();
$$->code += $1->code + $2->code;
$$->code += "\n" + $1->str + " ENDP\n\n";
$$->line_num = $1->line_num;
func_node *temp = functable.is_declared(node[2]->str);
if (functable.is_defined(node[2]->str))
++error_count, fprintf(logout, "At line no : %d redefination of function\n\n", node[2]->line_num);
else if (temp)
{
if (node[1]->str != temp->type)
++error_count, fprintf(logout, "At line no : %d return type mismatch\n\n", node[1]->line_num);
else if (node[1]->str != "float" && node[1]->str != ret_type)
++error_count, fprintf(logout, "At line no : %d return type mismatch\n\n", node[1]->line_num);
else if (temp->vec.size() > node[4]->vec.size())
++error_count, fprintf(logout, "At line no : %d too few parameters\n\n", node[3]->line_num);
else if (temp->vec.size() < node[4]->vec.size())
++error_count, fprintf(logout, "At line no : %d too many parameters\n\n", node[3]->line_num);
else
{
bool isgood = true;
for (int i = 0; i < temp->vec.size(); ++i)
{
if (temp->vec[i] != node[4]->vec[i]->type)
{
isgood = false;
++error_count, fprintf(logout, "At line no : %d parameter type mismatch\n\n", node[3]->line_num);
break;
}
}
isdefine = mark = isgood;
}
}
else
{
if (node[1]->str != "float" && node[1]->str != ret_type)
++error_count, fprintf(logout, "At line no : %d return type mismatch\n\n", node[1]->line_num);
else
{
temp = new func_node();
temp->name = node[2]->str;
temp->type = node[1]->str;
for (int i = 0; i < node[4]->vec.size(); ++i)
temp->vec.push_back(node[4]->vec[i]->type);
mark = true;
}
}
table.exit_scope();
node.clear();
ret_type = "void";
if (mark)
{
temp->param = ls;
ls.clear();
functable.insert_def(temp);
if (!isdefine)
table.insert(node[2]->str, node[2]->type, node[1]->str);
}
}
| go_to_scope
{
$$ = get_node();
$$->code += $1->code;
$$->code += "\n" + $1->str + " ENDP\n\n";
$$->line_num = $1->line_num;
}
;
go_to_scope : type_specifier ID LPAREN parameter_list RPAREN
{
++scope_cnt;
table.enter_scope();
func_name = $2->get_name();
$$ = get_node();
$$->str = $2->get_name();
$$->code += $2->get_name() + " PROC\n\n";
$$->line_num = $1->line_num;
if (func_name != "main")
$$->code += "ret\n";
for (int i = 0; i < $4->vec.size(); ++i)
{
if (table.cur_look_up($4->vec[i]->str))
++error_count, fprintf(logout, "At line no : %d redeclaration of parameter\n\n", $4->vec[i]->line_num);
else
table.insert($4->vec[i]->str, "ID", $4->vec[i]->type);
}
node.push_back($1), node.push_back($1), node.push_back(info_node($2));
node.push_back(info_node($3)), node.push_back($4), node.push_back(info_node($5));
}
|
go compound_statement
{
bool mark = false;
bool isdefine = false;
$$ = get_node();
$$->str = $1->str;
$$->code += $1->code + $2->code;
$$->line_num = node[1]->line_num;
if (func_name != "main")
$$->code += "ret\n";
func_node *temp = functable.is_declared(node[2]->str);
if (functable.is_defined(node[2]->str))
++error_count, fprintf(logout, "At line no : %d redefination of function\n\n", node[2]->line_num);
else if (temp)
{
if (node[1]->str != temp->type)
++error_count, fprintf(logout, "At line no : %d return type mismatch\n\n", node[1]->line_num);
else if (temp->type != "float" && temp->type != ret_type)
++error_count, fprintf(logout, "At line no : %d return type mismatch\n\n", node[1]->line_num);
else if (temp->vec.size())
++error_count, fprintf(logout, "At line no : %d too few parameters\n\n", node[3]->line_num);
else
isdefine = mark = true;
}
else
{
if (node[1]->str != "float" && node[1]->str != ret_type)
++error_count, fprintf(logout, "At line no : %d return type mismatch\n\n", node[1]->line_num);
else
{
temp = new func_node();
temp->name = node[2]->str;
temp->type = node[1]->str;
mark = true;
}
}
table.exit_scope();
node.clear();
ret_type = "void";
if (mark)
{
functable.insert_def(temp);
if (!isdefine)
table.insert(node[2]->str, node[2]->type, node[1]->str);
}
}
;
go : type_specifier ID LPAREN RPAREN
{
table.enter_scope();
++scope_cnt;
func_name = $2->get_name();
$$ = get_node();
$$->str = $2->get_name();
$$->code += $2->get_name() + " PROC\n\n";
if ($2->get_name() == "main")
$$->code += "MOV AX, @DATA\nMOV DS, AX\n";
$$->line_num = $1->line_num;
node.push_back($1), node.push_back($1), node.push_back(info_node($2));
node.push_back(info_node($3)), node.push_back(info_node($4));
}
;
parameter_list : parameter_list COMMA type_specifier ID
{
tree_node *temp = get_node();
temp->str = $4->get_name();
temp->type = type_name;
temp->line_num = $4->line_num;
$$->vec.push_back(temp);
ls.push_back($4->get_name() + get_scope_cnt(scope_cnt + 1));
variable += $4->get_name() + get_scope_cnt(scope_cnt + 1) + " DW ?\n";
}
| parameter_list COMMA type_specifier
{
tree_node *temp = get_node();
temp->type = type_name;
$$->vec.push_back(temp);
}
| type_specifier ID
{
tree_node *temp = get_node();
temp->str = $2->get_name();
temp->type = type_name;
temp->line_num = $2->line_num;
ls.push_back($2->get_name() + get_scope_cnt(scope_cnt + 1));
$$ = get_node();
$$->vec.push_back(temp);
$$->line_num = $1->line_num;
variable += $2->get_name() + get_scope_cnt(scope_cnt + 1) + " DW ?\n";
}
| type_specifier
{
tree_node *temp = get_node();
temp->type = $1->str;
$$ = get_node();
$$->vec.push_back(temp);
$$->line_num = $1->line_num;
}
;
compound_statement : LCURL statements RCURL
{
$$ = get_node();
$$ = $2;
$$->line_num = $1->line_num;
}
| LCURL RCURL
{
$$ = get_node();
$$->line_num = $1->line_num;
}
;
var_declaration : type_specifier declaration_list SEMICOLON
{
$$ = get_node();
$$->line_num = $1->line_num;
}
;
type_specifier : INT
{
$$ = get_node();
$$->str = "int";
$$->line_num = $1->line_num;
type_name = "int";
}
| FLOAT
{
$$ = get_node();
$$->str = "float";
$$->line_num = $1->line_num;
type_name = "float";
}
| VOID
{
$$ = get_node();
$$->str = "void";
$$->line_num = $1->line_num;
type_name = "void";
}
;
declaration_list : declaration_list COMMA ID
{
tree_node *temp = get_node();
temp->str = $3->get_name();
temp->type = type_name;
$$->vec.push_back(temp);
$$->line_num = $1->line_num;
variable += $3->get_name() + get_scope_cnt(scope_cnt) + " DW ?\n";
if (type_name == "void")
++error_count, fprintf(logout, "At line no : %d variable type can not be void\n\n", $3->line_num);
else if (table.cur_look_up($3->get_name()))
++error_count, fprintf(logout, "At line no : %d redeclaration of variable\n\n", $3->line_num);
else
table.insert($3->get_name(), $3->get_type(), type_name);
}
| declaration_list COMMA ID LTHIRD CONST_INT RTHIRD
{
tree_node *temp = get_node();
temp->str = $3->get_name();
temp->type = type_name;
$$->vec.push_back(temp);
$$->line_num = $1->line_num;
variable += $3->get_name() + get_scope_cnt(scope_cnt) + " DW " + $5->get_name() + " DUP(0)\n";
if (type_name == "void")
++error_count, fprintf(errorout, "At line no : %d variable type can not be void\n\n", $3->line_num);
else if (table.cur_look_up($3->get_name()))
++error_count, fprintf(errorout, "At line no : %d redeclaration of variable\n\n", $3->line_num);
else
table.insert($3->get_name(), "array", type_name);
}
| ID
{
tree_node *temp = get_node();
temp->str = $1->get_name();
temp->type = type_name;
$$ = get_node();
$$->vec.push_back(temp);
$$->line_num = $1->line_num;
variable += $1->get_name() + get_scope_cnt(scope_cnt) + " DW ?\n";
if (type_name == "void")
++error_count, fprintf(errorout, "At line no : %d variable type can not be void\n\n", $1->line_num);
else if (table.cur_look_up($1->get_name()))
++error_count, fprintf(errorout, "At line no : %d redeclaration of variable\n\n", $1->line_num);
else
table.insert($1->get_name(), $1->get_type(), type_name);
}
| ID LTHIRD CONST_INT RTHIRD
{
tree_node *temp = get_node();
temp->str = $1->get_name();
temp->type = type_name;
$$ = get_node();
$$->vec.push_back(temp);
$$->line_num = $1->line_num;
variable += $1->get_name() + get_scope_cnt(scope_cnt) + " DW " + $3->get_name() + " DUP(0)\n";
if (type_name == "void")
++error_count, fprintf(errorout, "At line no : %d variable type can no be void\n\n", $1->line_num);
else if (table.cur_look_up($1->get_name()))
++error_count, fprintf(errorout, "At line no : %d variable name already declared\n\n", $1->line_num);
else
table.insert($1->get_name(), "array", type_name);
}
;
statements : statement
{
$$ = get_node();
$$ = $1;
}
| statements statement
{
$$ = get_node();
$$->code = $1->code + $2->code;
$$->line_num = $1->line_num;
}
;
statement : var_declaration
{
$$ = get_node();
$$ = $1;
}
| expression_statement
{
$$ = get_node();
$$ = $1;
}
| compound_statement
{
$$ = get_node();
$$ = $1;
}
| FOR LPAREN expression_statement expression_statement expression RPAREN statement
{
string conditionlabel = get_label();
string statementlabel = get_label();
string exitscopelabel = get_label();
$$ = get_node();
$$->code += $3->code;
$$->code += conditionlabel + ":\n";
$$->code += $4->code;
$$->code += "CMP " + $4->str + ", 1\n";
$$->code += "JE " + statementlabel + "\n";
$$->code += "JMP " + exitscopelabel + "\n";
$$->code += statementlabel + ":\n";
$$->code += $7->code + $5->code;
$$->code += "JMP " + conditionlabel + "\n";
$$->code += exitscopelabel + ":\n";
$$->line_num = $1->line_num;
}
| IF LPAREN expression RPAREN statement %prec LOWER_THAN_ELSE
{
string conditionlabel = get_label();
string statementlabel = get_label();
string exitscopelabel = get_label();
$$ = get_node();
$$->code += conditionlabel + ":\n";
$$->code += $3->code;
$$->code += "CMP " + $3->str + ", 0\n";
$$->code += "JMP " + exitscopelabel + "\n";
$$->code += "JE " + statementlabel + "\n";
$$->code += statementlabel + ":\n";
$$->code += $5->code;
$$->code += exitscopelabel + ":\n";
$$->line_num = $1->line_num;
}
| IF LPAREN expression RPAREN statement ELSE statement
{
string conditionlabel = get_label();
string statementlabel = get_label();
string elselabel = get_label();
string exitscopelabel = get_label();
$$ = get_node();
$$->code += conditionlabel + ":\n";
$$->code += $3->code;
$$->code += "CMP " + $3->str + ", 0\n";
$$->code += "JMP " + elselabel + "\n";
$$->code += "JE " + statementlabel + "\n";
$$->code += statementlabel + ":\n";
$$->code += $5->code;
$$->code += "JMP " + exitscopelabel + "\n";
$$->code += elselabel + ":\n";
$$->code += $7->code;
$$->code += exitscopelabel + ":\n";
$$->line_num = $1->line_num;
}
| WHILE LPAREN expression RPAREN statement
{
string conditionlabel = get_label();
string statementlabel = get_label();
string exitscopelabel = get_label();
$$ = get_node();
$$->code += conditionlabel + ":\n";
$$->code += $3->code;
$$->code += "CMP " + $3->str + ", 0\n";
$$->code += "JE " + exitscopelabel + "\n";
$$->code += "JMP " + statementlabel + "\n";
$$->code += statementlabel + ":\n";
$$->code += $5->code;
$$->code += "JMP " + conditionlabel + "\n";
$$->code += exitscopelabel + ":\n";
$$->line_num = $1->line_num;
}
| PRINTLN LPAREN ID RPAREN SEMICOLON
{
$$ = get_node();
symbolInfo *temp = table.look_up($3->get_name());
$$->code += "MOV AX, " + $3->get_name() + get_scope_cnt(temp->num) + "\n";
$$->code += "CALL OUP\n";
$$->code += "MOV AH, 2\n";
$$->code += "MOV DL, 0AH\n";
$$->code += "INT 21H\n";
$$->code += "MOV DL, 0DH\n";
$$->code += "INT 21H\n";
}
| RETURN expression SEMICOLON
{
$$ = get_node();
$$ = $2;
if (func_name != "main")
{
$$->code += "MOV AX, " + $2->str + "\n";
$$->code += "PUSH AX\n";
}
$$->line_num = $1->line_num;
ret_type = $2->type;
}
;
expression_statement : SEMICOLON
{
$$ = get_node();
$$->line_num = $1->line_num;
}
| expression SEMICOLON
{
$$ = get_node();
$$ = $1;
}
;
variable : ID
{
$$ = get_node();
$$->line_num = $1->line_num;
symbolInfo *temp = table.look_up($1->get_name());
if (temp)
{
if (temp->isarray)
++error_count, fprintf(logout, "At line no : %d array type without []\n\n", $1->line_num);
else
{
$$->str = $1->get_name() + get_scope_cnt(temp->num);
$$->type = temp->var_type;
}
}
else
++error_count, fprintf(logout, "At line no : %d undeclared variable\n\n", $1->line_num);
}
| ID LTHIRD expression RTHIRD
{
$$ = get_node();
$$->code += $3->code;
$$->code += "MOV BX, " + $3->str + "\n";
$$->code += "SHL BX, 2\n";
$$->line_num = $1->line_num;
symbolInfo *temp = table.look_up($1->get_name());
if ($3->type != "int")
++error_count, fprintf(logout, "At line no : %d non integer array index\n\n", $3->line_num);
else if (temp)
{
if (!temp->isarray)
++error_count, fprintf(logout, "At line no : %d variable is not an array type\n\n", $1->line_num);
else
{
$$->str = $1->get_name() + get_scope_cnt(temp->num) + "[BX]";
$$->type = temp->var_type;
}
}
else
++error_count, fprintf(logout, "At line no : %d undeclared variable\n\n", $1->line_num);
}
;
expression : logic_expression
{
$$ = get_node();
$$ = $1;
}
| variable ASSIGNOP logic_expression
{
$$ = get_node();
$$->str = $1->str;
$$->code += $3->code;
$$->code += "MOV AX, " + $3->str + "\n";
$$->code += $1->code;
$$->code += "MOV " + $$->str + ", AX\n";
$$->line_num = $1->line_num;
if ($3->type == "void")
++error_count, fprintf(errorout, "At line no : %d void can not be a type in ASSIGNOP\n\n", $3->line_num);
else if ($1->type == "int" && $3->type == "float")
++error_count, fprintf(errorout, "At line no : %d type mismatch\n\n", $2->line_num);
else
$$->type = $1->type;
}
;
logic_expression : rel_expression
{
$$ = get_node();
$$ = $1;
}
| rel_expression LOGICOP rel_expression
{
$$ = get_node();
$$->str = get_temp_var();
$$->code += $3->code + $1->code;
$$->code += "MOV AX, " + $1->str + "\n";
$$->line_num = $1->line_num;
variable += $$->str + " DW ?\n";
if ($2->get_name() == "&&")
$$->code += "AND AX, " + $3->str + "\n";
else
$$->code += "OR AX, " + $3->str + "\n";
$$->code += "MOV " + $$->str + ", AX\n";
if ($1->type == "void" || $3->type == "void")
++error_count, fprintf(errorout, "At line no : %d void can not be used in LOGICOP\n\n", $1->line_num);
else
$$->type = "int";
}
;
rel_expression : simple_expression
{
$$ = get_node();
$$ = $1;
}
| simple_expression RELOP simple_expression
{
$$ = get_node();
$$->str = get_temp_var();
$$->code += $3->code + $1->code;
$$->code += "MOV AX, " + $3->str + "\n";
$$->code += "CMP " + $1->str + ", AX\n";
$$->line_num = $1->line_num;
variable += $$->str + " DW ?\n";
string label1 = get_label();
string label2 = get_label();
if ($2->get_name() == "<")
$$->code += "JL " + label1 + "\n";
else if ($2->get_name() == "<=")
$$->code += "JLE " + label1 + "\n";
else if ($2->get_name() == ">")
$$->code += "JG " + label1 + "\n";
else if ($2->get_name() == ">=")
$$->code += "JGE " + label1 + "\n";
else if ($2->get_name() == "==")
$$->code += "JE " + label1 + "\n";
$$->code += "MOV " + $$->str + ", 0\n";
$$->code += "JMP " + label2 + "\n";
$$->code += label1 + ":\n";
$$->code += "MOV " + $$->str + ", 1\n";
$$->code += label2 + ":\n";
if ($1->type == "void" || $3->type == "void")
++error_count, fprintf(errorout, "At line no : %d void can not be used in RELOP\n\n", $1->line_num);
else
$$->type = "int";
}
;
simple_expression : term
{
$$ = get_node();
$$ = $1;
}
| simple_expression ADDOP term
{
$$ = get_node();
$$->str = get_temp_var();
$$->code += $3->code + $1->code;
$$->code += "MOV AX, " + $1->str + "\n";
if ($2->get_name() == "+")
$$->code += "ADD AX, " + $3->str + "\n";
else
$$->code += "SUB AX, " + $3->str + "\n";
$$->code += "MOV " + $$->str + ", AX\n";
$$->line_num = $1->line_num;
variable += $$->str + " DW ?\n";
if ($1->type == "void" || $3->type == "void")
++error_count, fprintf(errorout, "At line no : %d void can not be used in ADDOP\n\n", $1->line_num);
else if ($1->type == "float" || $3->type == "float")
$$->type = "float";
else
$$->type = "int";
}
;
term : unary_expression
{
$$ = get_node();
$$ = $1;
}
| term MULOP unary_expression
{
$$ = get_node();
$$->str = get_temp_var();
$$->line_num = $1->line_num;
if ($2->get_name() == "*")
{
$$->code += $3->code;
$$->code += "MOV AX, " + $1->str + "\n";
$$->code += $1->code;
$$->code += "MOV BX, " + $3->str + "\n";
$$->code += "MUL BX\n";
$$->code += "MOV " + $$->str + ", AX\n";
}
else
{
$$->code += $3->code;
$$->code += "MOV AX, " + $1->str + "\n";
$$->code += $1->code;
$$->code += "MOV DX, 0\n";
$$->code += "MOV BX, " + $3->str + "\n";
$$->code += "DIV BX\n";
if ($2->get_name() == "/")
$$->code += "MOV " + $$->str + ", AX\n";
else
$$->code += "MOV " + $$->str + ", DX\n";
}
variable += $$->str + " DW ?\n";
if ($2->get_name() == "%" && ($1->type != "int" || $3->type != "int"))
++error_count, fprintf(errorout, "At line no : %d interger expected in both operand of modulus\n\n", $1->line_num);
else if ($1->type == "void" || $3->type == "void")
++error_count, fprintf(errorout, "At line no : %d void can not be used in MULOP\n\n", $1->line_num);
else if ($1->type == "float" || $3->type == "float")
$$->type = "float";
else
$$->type = "int";
}
;
unary_expression : ADDOP unary_expression
{
$$ = get_node();
if ($1->get_name() == "-")
{
$$->str = get_temp_var();
$$->code += $2->code;
$$->code += "MOV AX, " + $2->str + "\n";
$$->code += "NEG AX\n";
$$->code += "MOV " + $$->str + ", AX\n";
variable += $$->str + " DW ?\n";
}
$$->type = $2->type;
$$->line_num = $1->line_num;
}
| NOT unary_expression
{
$$ = get_node();
$$->str = get_temp_var();
$$->code += $2->code;
$$->code += "MOV AX, " + $2->str + "\n";
$$->code += "NOT AX\n";
$$->code += "MOV " + $$->str + ", AX\n";
$$->line_num = $1->line_num;
variable += $$->str + " DW ?\n";
if ($2->type != "int")
++error_count, fprintf(logout, "At line no : %d interger expected in NOT operator\n\n", $2->line_num);
else
$$->type = "int";
}
| factor
{
$$ = get_node();
$$ = $1;
}
;
factor : variable
{
$$ = get_node();
$$ = $1;
}
| ID LPAREN argument_list RPAREN
{
func_node *temp = functable.is_defined($1->get_name());
$$ = get_node();
if (temp->param.size() == $3->vec.size())
{
for (int i = 0; i < $3->vec.size(); ++i)
{
$$->code += "MOV AX, " + $3->vec[i]->str + "\n";
$$->code += "MOV " + temp->param[i] + ", AX\n";
}
}
$$->code += "CALL " + $1->get_name() + "\n";
$$->line_num = $1->line_num;
if (temp)
{
if (temp->vec.size() > $3->vec.size())
++error_count, fprintf(logout, "At line no : %d too few arguments\n\n", $3->line_num);
else if (temp->vec.size() < $3->vec.size())
++error_count, fprintf(logout, "At line no : %d too many arguments\n\n", $3->line_num);
else