lexer update

parse decimals and negatives.

.gitignore

@@ -0,0 +1,6 @@
+/.idea
+/.cache
+/.ccls-cache
+/compile_commands.json
+/cmake-build-debug
+/build

main.cpp

@@ -1,22 +1,29 @@
 #include <jjx.hpp>
 #include <iostream>
+#include <fstream>
 
 using namespace jjx;
 
-int main(int argc, char *argv[]) {
-    if (argc == 1) {
-        std::cerr << "Expected JSON input argument to parse" << std::endl;
-        return 1;
-    }
+void ParseJsonFile(const std::string& file_path) {
+    std::ifstream file(file_path, std::ios::binary);
+    if (!file)
+        throw std::runtime_error("We couldn't find the file: " + file_path);
 
-    std::string in{argv[1]};
+    std::streamsize file_size;
+    file.seekg(0, std::ios::end);
+    file_size = file.tellg();
+    file.seekg(0, std::ios::beg);
 
-    auto [ast, error] = json::parse(in);
-    if (error.size()) {
-        std::cerr << error << std::endl;
-        return 1;
-    }
+    std::string file_content(file_size, '\0');
+    file.read(&file_content[0], file_size);
+    file.close();
 
-    std::cout << json::deparse(ast);
-    return 0;
+    auto [text, parse_error] = json::parse(file_content);
+    if (!parse_error.empty())
+        std::cerr << "Error while parsing json: " << parse_error << std::endl;
+
+    std::cout << json::deparse(text) << std::endl;
+}
+int main(int argc, char* argv[]) {
+    ParseJsonFile("../samples/widgets.json");
 }

samples/widgets.json

@@ -4,13 +4,13 @@
     "title": "Sample Konfabulator Widget",
     "name": "main_window",
     "width": 500,
-    "height": 500
+    "height": -500.75
   },
   "image": {
     "src": "Images/Sun.png",
     "name": "sun1",
-    "hOffset": 250,
-    "vOffset": 250,
+    "hOffset": -250,
+    "vOffset": 2.50,
     "alignment": "center"
   },
   "text": {

src/jjx.cpp

@@ -1,3 +0,0 @@
-//
-// Created by josh on 8/19/24.
-//

src/json.cpp

@@ -101,16 +101,37 @@ namespace jjx::json {
         int index = original_index;
         json::token token {"", token_type::number, index};
         std::string value = "";
-        // TODO: handle not just integers
+        bool decimal_present = false;
+
+        // Negative numbers.
+        if (raw_json[index] == '-') {
+            token.value += raw_json[index];
+            index++;
+        }
+
+        /* If there's a decimal before a digit. Like ".006",
+         * it's presumed a zero should be before the decimal. */
+        if (raw_json[index] == '.') {
+            token.value += '0';
+            token.value += raw_json[index];
+            decimal_present = true;
+            index++;
+        }
+
         while(true) {
-            if (index == raw_json.length()) {
+            if (index == raw_json.length())
                 break;
-            }
 
             auto c = raw_json[index];
-            if (!(c >= '0' && c <= '9')) {
-                break;
+            if (c == '.') {
+                if (decimal_present)
+                    break;
+                decimal_present = true;
+                token.value += c;
             }
+            // Only regex non-numeric values if we didn't catch it earlier.
+            else if (!(c >= '0' && c <= '9'))
+                break;
 
             token.value += c;
             index++;