1 files changed, 11 insertions, 2 deletions

diff --git a/attocc.c b/attocc.c
index 2d38f95..c81db15 100644
--- a/attocc.c
+++ b/attocc.c
@@ -222,6 +222,7 @@ union token_data {
 struct token {
   enum token_kind kind;
   union token_data data;
+  int position;
 };
 
 char is_numeric(char c) { return c >= '0' && c <= '9'; }
@@ -321,6 +322,7 @@ struct token *tokenize(char *source) {
   struct token *tokens = NULL;
   while (*p) {
     unsigned long remaining = end - p;
+    unsigned long position = p - source;
 
     //* whitespace
     if (p[0] == ' ' || p[0] == '\t' || p[0] == '\n') {
@@ -358,6 +360,7 @@ struct token *tokenize(char *source) {
           return NULL;
         new_token->kind = TOK_SEPERATOR;
         new_token->data.seperator = i;
+        new_token->position = position;
         match = 1;
         break;
       }
@@ -376,6 +379,7 @@ struct token *tokenize(char *source) {
             return NULL;
           new_token->kind = TOK_OPERATOR;
           new_token->data.operator= i;
+          new_token->position = position;
 
           p += strlen(op);
           match = 1;
@@ -397,6 +401,7 @@ struct token *tokenize(char *source) {
             return NULL;
           new_token->kind = TOK_KEYWORD;
           new_token->data.keyword = i;
+          new_token->position = position;
 
           p += strlen(kw);
           match = 1;
@@ -436,6 +441,7 @@ struct token *tokenize(char *source) {
       new_token->kind = TOK_CONSTANT;
       new_token->data.constant_kind = CONST_INT;
       new_token->data.constant_int_value = value;
+      new_token->position = position;
       continue;
     }
 
@@ -459,6 +465,7 @@ struct token *tokenize(char *source) {
       new_token->kind = TOK_CONSTANT;
       new_token->data.constant_kind = CONST_STR;
       new_token->data.constant_str_value = str;
+      new_token->position = position;
       continue;
     }
 
@@ -481,6 +488,7 @@ struct token *tokenize(char *source) {
       new_token->kind = TOK_CONSTANT;
       new_token->data.constant_kind = CONST_CHAR;
       new_token->data.constant_char_value = chr;
+      new_token->position = position;
       continue;
     }
 
@@ -499,7 +507,7 @@ struct token *tokenize(char *source) {
       struct token *new_token = token_push(&tokens, &num_tokens);
       new_token->kind = TOK_IDENTIFIER;
       new_token->data.identifier = ident_str;
-
+      new_token->position = position;
       continue;
     }
 
@@ -509,7 +517,7 @@ struct token *tokenize(char *source) {
 
   struct token *new_token = token_push(&tokens, &num_tokens);
   new_token->kind = TOK_END;
-
+  new_token->position = 0;
   return tokens;
 }
 
@@ -537,6 +545,7 @@ void free_tokens(struct token *tokens) {
 #ifdef DEBUG
 void debug_tokens(struct token *tokens) {
   for (int i = 0; tokens[i].kind != TOK_END; i++) {
+    printf("%4lu ", tokens[i].position);
     switch (tokens[i].kind) {
     case TOK_IDENTIFIER:
       printf("TOK_IDENTIFIER:%s, ", tokens[i].data.identifier);