Add error pretty print

src/errors.cpp

@@ -0,0 +1,24 @@
+#include <vector>
+#include <string>
+#include <iostream>
+using namespace std;
+
+#include "include/colors.h"
+#include "include/tokenize.h"
+
+
+void pretty_print_error(vector<string> history, CodePosition pos) {
+    if (pos.column == -1 || pos.line == -1)
+        return;
+
+    cout << pos.column << ";" << pos.line << endl;
+    string line = history[pos.line];
+
+    printf(BOLD "%4d " RESET , pos.line+1);
+    cout << line << endl;
+
+    for (int i=0; i < pos.column + 5; i++)
+        cout << " ";
+
+    cout << BOLD RED "^--" RESET << endl;
+}

src/include/errors.h

@@ -0,0 +1,6 @@
+#include <string>
+using namespace std;
+
+#include "tokenize.h"
+
+void pretty_print_error(vector<string> history, CodePosition pos);

src/include/parser.h

@@ -111,10 +111,12 @@ class ParseException : public std::exception {
     }
 };
 
-class SyntaxError : public std::runtime_error {
+class SyntaxError : public runtime_error {
 public:
-    explicit SyntaxError(const std::string& message)
-        : std::runtime_error(message) {}
+    explicit SyntaxError(const string& message, CodePosition pos)
+        : runtime_error(message), pos(pos) {}
+
+    const CodePosition pos;
 };
 
 /**

src/parser.cpp

@@ -16,13 +16,13 @@ void _debug_print_tree(const Node& node, int depth, const string& prefix = "") {
 
         string new_prefix = prefix;
         size_t pos = new_prefix.find("└──");
-        while (pos != std::string::npos) {
+        while (pos != string::npos) {
             new_prefix.replace(pos, 9, "   ");
             pos = new_prefix.find("└──", pos + 4);
         }
 
         pos = new_prefix.find("├──");
-        while (pos != std::string::npos) {
+        while (pos != string::npos) {
             new_prefix.replace(pos, 9, "│   ");
             pos = new_prefix.find("├──", pos + 6);
         }
@@ -43,8 +43,13 @@ void _debug_print_tree(const Node& node, int depth, const string& prefix = "") {
 Node parse(vector<Token> tokens) {
     reverse(tokens.begin(), tokens.end());
 
-    if (tokens.size() == 0)
-        throw SyntaxError("Input must not be empty");
+    if (tokens.size() == 0) {
+        CodePosition pos = {
+            .line = -1,
+            .column = -1
+        };
+        throw SyntaxError("Input must not be empty", pos);
+    }
         
 
     // At least 1 instruction
@@ -417,8 +422,13 @@ ParseReturn parse_f(vector<Token> tokens) {
                 ParseReturn ret = parse_expr(tokens);
                 tokens=ret.tokens;
 
-                if (tokens.size() < 1 || tokens.back().type != TokenType::RParenthese)
-                    throw SyntaxError("Missing ')'");
+                if (tokens.size() < 1 || tokens.back().type != TokenType::RParenthese) {
+                    CodePosition pos = {
+                        .line = -1,
+                        .column = -1
+                    };
+                    throw SyntaxError("Missing ')'", pos);
+                }
 
                 tokens.pop_back();