new error view

analyzers/c_analyzer/c_analyzer.l

@@ -1,72 +1,107 @@
 %{
 #include "c_analyzer.tab.h"
+#include <string.h>
+
+extern char* path;
 
 int line_number = 1; 
+int column_number = 1;
+
+char* read_ith_line(int line_number) {
+    
+    FILE *file = fopen(path, "r");
+    
+    char buffer[1024];
+    int current_line = 0;
+
+    while (fgets(buffer, 1024, file) != NULL) {
+        if (current_line == line_number) {
+            return strdup(buffer);
+        }
+        memset(buffer, 1024, 0);
+        current_line++;
+    }
+
+    return NULL;
+}
 
 void yyerror(const char *s) {
+    column_number--;
     fprintf(stderr, 
-            "\033[91m\nError at line %i: %s near '%s'\033[0m\n", 
+            "\033[91m\nError at line %i, column %i: %s near '%s'\n", 
             line_number, 
+            column_number,
             s, 
             yytext);
 
+    fprintf(stderr, "%s", read_ith_line(line_number - 1));
+    for (int i = 0; i < column_number - 1; ++i) fprintf(stderr, "%c", ' ');
+    fprintf(stderr, "%c\033[0m", '^');
     exit(-1);
 }
 
 %}
 
 %%
-"{"      { return LBRACE; }
-"}"      { return RBRACE; }
-"("      { return LPAREN; }
-")"      { return RPAREN; }
-";"      { return SEMICOLON; }
-"="      { return ASSIGN; }
-"+"      { return PLUS; }
-"-"      { return MINUS; }
-"*"      { return MULT; }
-"/"      { return DIV; }
-"%"      { return MOD; }
-"&&"     { return AND; }
-"||"     { return OR; }
-"!"      { return NOT; }
-"<"      { return LT; }
-">"      { return GT; }
-"=="     { return EQ; }
+"{"      { column_number += 1; return LBRACE; }
+"}"      { column_number += 1; return RBRACE; }
+"("      { column_number += 1; return LPAREN; }
+")"      { column_number += 1; return RPAREN; }
+";"      { column_number += 1; return SEMICOLON; }
+"="      { column_number += 1; return ASSIGN; }
+"+"      { column_number += 1; return PLUS; }
+"-"      { column_number += 1; return MINUS; }
+"*"      { column_number += 1; return MULT; }
+"/"      { column_number += 1; return DIV; }
+"%"      { column_number += 1; return MOD; }
+"&&"     { column_number += 2; return AND; }
+"||"     { column_number += 2; return OR; }
+"!"      { column_number += 1; return NOT; }
+"<"      { column_number += 1; return LT; }
+">"      { column_number += 1; return GT; }
+"=="     { column_number += 2; return EQ; }
 
-"return" { return RET; }
-"print"  { return PRINT; }
+"return" { column_number += strlen("return"); return RET; }
+"print"  { column_number += strlen("print"); return PRINT; }
 
-"while"  { return WHILE; }
-"do"     { return DO; }
-"for"    { return FOR; }
+"while"  { column_number += strlen("while"); return WHILE; }
+"do"     { column_number += strlen("do"); return DO; }
+"for"    { column_number += strlen("for"); return FOR; }
 
-"if"     { return IF; }
-"else"   { return ELSE; }
+"if"     { column_number += strlen("if"); return IF; }
+"else"   { column_number += strlen("else"); return ELSE; }
 
-"func"   { return FUNC; }
-","      { return COMMA; }
+"func"   { column_number += strlen("func"); return FUNC; }
+","      { column_number += 1; return COMMA; }
 
 "//" { 
     int c;
     while ((c = input()) != '\n' && c != 0);
-    if (c == '\n') line_number++;
+    if (c == '\n') {
+        line_number++;
+        column_number = 1;
+    }
 }
 
 "/*" { 
     int c, prev = 0;
     while ((c = input()) != 0) {
-        if (c == '\n') line_number++;
+        if (c == '\n') {
+            line_number++;
+            column_number = 1;
+        } else {
+            column_number++;
+        }
         if (prev == '*' && c == '/') break;
         prev = c;
     }
     if (c == 0) yyerror("Unterminated comment");
 }
 
-[0-9]+                 { yylval.str = strdup(yytext); return NUMBER; }
-[a-zA-Z_][a-zA-Z0-9_]* { yylval.str = strdup(yytext); return IDENTIFIER; }
-[ \t]   ;
-\n       { line_number++; }
+[0-9]+                 { yylval.str = strdup(yytext); column_number += strlen(yytext); return NUMBER; }
+[a-zA-Z_][a-zA-Z0-9_]* { yylval.str = strdup(yytext); column_number += strlen(yytext); return IDENTIFIER; }
+[ \t]   { column_number++; }
+\n       { line_number++; column_number = 1; }
 .        { yyerror("Invalid character"); }
 %%
 

analyzers/c_analyzer/c_analyzer.y

@@ -8,6 +8,7 @@ extern char *yytext;
 extern FILE *yyin;
 
 bool debug = false; // debug mode
+char* path;
 
 %}
 
@@ -128,8 +129,6 @@ expr:
 
 int main(int argc, char **argv) {
     if (argc > 1) {
-        char* path;
-
         // debug mode
         if (argc > 2) {
             path = argv[2];

code.txt

@@ -5,7 +5,7 @@ func FUNC_1(a, b, c) {
     }
 
     x = x + 1;
-    a = a + 1;
+    a = a + 1;;
 }
 
 func FUNC_2() {