I am working on a project that parses a text file thats suppose to be a simple coded program. The problem is that when I try to complile the program I get this error:
In file included from driver.c:10:
parser.c: In function ‘Statement’:
parser.c:24: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
parser.c:153: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
parser.c:159: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
parser.c:167: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
parser.c:176: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
parser.c:185: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
parser.c:194: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
parser.c:201: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
parser.c:209: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
driver.c:19: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘{’ token
driver.c:50: error: old-style parameter declarations in prototyped function definition
driver.c:50: error: expected ‘{’ at end of input
Im not familiar with this error and not sure how to fix it.
Here is my parser.c file which the error is happening in:
#include <stdio.h>
#include <stdlib.h>
#include "parser.h"
AST_NODE* Program(AST_NODE* node);
AST_NODE* Statement(AST_NODE* node)
AST_NODE* AssignStmt(AST_NODE* node);
AST_NODE* Print(AST_NODE *node);
AST_NODE* Repeat(AST_NODE* node);
AST_NODE* Exp(AST_NODE* node);
AST_NODE* Factor(AST_NODE* node);
AST_NODE* Term(AST_NODE* node);
AST_NODE* parser(TOKEN* token,AST_NODE* node, FILE* input_file)
{
AST_NODE temp = malloc(sizeof(AST_NODE*));
if(token->type == Id)
{
temp-> tok = token;
node -> child1 = temp;
return node
}else
if(token->type == keyword)
{
if(strcmp(node->attribute, "print") == 0)
{
temp -> type = print;
node -> child1 = temp;
return node;
}
else if(strcmp(node->attribute, "repeat") == 0)
{
temp -> type = repeat;
node -> child1 = temp;
return node;
}
return node->prev;
}else
if(token->type == num)
{
temp->type = factor;
temp->tok = token;
AST_NODE temp2 = Exp(Term(temp));
node-> child3 = temp2
return node;//back to ID->term->exp then to either print repeat or assignment
}else
if(token->type == addOp)
{
temp-> tok = token;
node-> child2 = temp;
return node;
}else
if(token->type == multOp)
{
temp-> tok = token;
node-> child2 = temp;
return node;
}else
if(token->type == assignment)
{
temp->type = assignStmt;
temp->tok = token;
node->child2 = temp;
return node;
}else
if(token->type == semicolon)
{
temp-> type = assignStmt;
temp-> tok = token;
if(node->type == keyword)
{
node->child3 = temp;
}else
{
node->child4 = temp;
}
return node;
}else
if(token->type == lparen)
{
temp -> tok = token;
if(node->type == repeat)
node->child2 = temp;
else
node->child1 = temp;
return node = node->prev;
}else
if(token->type == rparen)
{
temp -> tok = token;
if(node->type == repeat)
node->child4 = temp;
else
node->child3 = temp;
return node;
}else if(token->type == newLine)
{
while(node->type != program)
{
node = node->prev;
}
return node;
}else{
if(token->type == Id)
{
AST_NODE temp2 = AssignStmt(Program(node));
temp->type = Id;
temp->tok = token
temp->prev = temp2;
temp2-> child1 = temp;
return temp2;
}else if(strcmp(token->attribute,"print"))
{
AST_NODE temp2 = Print(Program(node));
temp->type = print;
temp->tok = token
temp->prev = temp2;
temp2-> child1 = temp;
return temp2;
}else if(strcmp(token->attribute,"repeat"))
{
AST_NODE temp2 = Repeat(Program(node));
temp->type = repeat;
temp->tok = token
temp->prev = temp2;
temp2-> child1 = temp;
return temp2;
}
printf("error");
return NULL;
}
}
AST_NODE* Program(AST_NODE* node)
{
node->type = program;
Statement(node);
return node;
}
AST_NODE* Statement(AST_NODE* node)
{
AST_NODE temp = malloc(sizeof(AST_NODE*));
temp-> type = statement;
temp-> prev = node;
node->child1-> temp;
return temp;
}
AST_NODE* AssignStmt(AST_NODE* node)
{
AST_NODE temp = malloc(sizeof(AST_NODE*));
temp->type = assignStmt;
temp-> prev = node;
node->child1-> temp;
return temp;
}
AST_NODE* Print(AST_NODE* node)
{
AST_NODE temp = malloc(sizeof(AST_NODE*));
temp->type = print;
temp-> prev = node;
node->child1-> temp;
return node;
}
AST_NODE* Repeat(AST_NODE* node)
{
AST_NODE temp = malloc(sizeof(AST_NODE*));
temp->type = repeat;
temp-> prev = node;
node->child1-> temp;
return node;
}
AST_NODE* Exp(AST_NODE* node)
{
AST_NODE temp = malloc(sizeof(AST_NODE*));
temp->type = exp;
temp->child1-> node;
return temp;
}
AST_NODE* factor(AST_NODE* node)
{
AST_NODE Temp = malloc(sizeof(AST_NODE*));
temp->type = factor;
node->child1-> temp;
return temp;
}
AST_NODE* Term(AST_NODE* node)
{
AST_NODE temp = malloc(sizeof(AST_NODE*));
temp->type = term;
temp->child1-> node;
return temp;
}
Here is my driver.c file where I am also getting the error “old-style parameter declarations in prototyped function definition expected ‘{‘ at end of input”. This also I am very unfamiliar with.
#include <stdio.h>
#include "parser.c"
#include "parser.h"
AST_NODE* parser(TOKEN* token,AST_NODE node, FILE *input_file);
int main(void)
{
TREE *current = 0;
FILE *input_file = fopen("test.txt", "r");
TOKEN *token = (TOKEN*) malloc(sizeof(TOKEN));
TOKEN *tok = (TOKEN*) malloc(sizeof(TOKEN));
AST_NODE* node = malloc(sizeof(AST_NODE));
while(!feof(input_file))
{
token = scan(input_file);
if(token->type != null)
{
parser(token,node,input_file);
printf("%s", token->attribute);
if(token->checkR == ';')
{
tok->type = semicolon;
tok->attribute = ";";
parser(tok,node,input_file);
}if(token->checkR == ')')
{
tok->type = rparen;
tok->attribute = ")";
parser(tok,node,input_file);
}
}
}
fclose(input_file);
return 0;
}
Here is my parser.h file where I declare my TOKEN and my AST_NODE to create my tree and form my tokens to fill the tree.
#ifndef _parser_h
#define _parser_h
typedef enum token_type
{
null,
Id,
keyword,
num,
addOp,
multOp,
assignment,
semicolon,
lparen,
rparen,
newLine
}TOKEN_TYPE;
typedef struct token{
int type;
char *attribute;
char checkR;
}TOKEN;
typedef enum node_type
{
program,
statement,
assignStmt,
print,
repeat,
exp,
factor,
term
}NODE_TYPE;
typedef struct ast_node{
NODE_TYPE type;
TOKEN *tok;
struct AST_NODE *prev;
struct AST_NODE *child1;
struct AST_NODE *child2;
struct AST_NODE *child3;
struct AST_NODE *child4;
struct AST_NODE *child5;
}AST_NODE;
#endif
There is one more file called scanner.c but I know its working perfectly because I have tested it in all the possible inputs and got no problems.
If anyone could help I would appreciate it very much.
is missing a semicolon (a major clue was the error message “In function ‘Statement’: …”) and so is line 24,
(Once you fix those, you will encounter other problems, some of which are mentioned by others here.)