Throw exception when duplicate keys are defined inside an inline table

src/main/java/com/moandjiezana/toml/InlineTableConverter.java

@@ -37,7 +37,14 @@ class InlineTableConverter implements ValueConverter {
           return errors;
         }
         
-        results.put(currentKey.toString().trim(), converted);
+        String currentKeyTrimmed = currentKey.toString().trim();
+        Object previous = results.put(currentKeyTrimmed, converted);
+        
+        if (previous != null) {
+          errors.duplicateKey(currentKeyTrimmed, context.line.get());
+          return errors;
+        }
+        
         currentKey = new StringBuilder();
         inValue = false;
       } else if (c == ',') {

src/main/java/com/moandjiezana/toml/Results.java

@@ -33,7 +33,12 @@ class Results {
     }
     
     void duplicateKey(String key, int line) {
-      sb.append("Duplicate key: ")
+      sb.append("Duplicate key");
+      if (line > -1) {
+        sb.append(" on line ")
+          .append(line);
+      }
+      sb.append(": ")
         .append(key)
         .append('\n');
     }

src/main/java/com/moandjiezana/toml/TomlParser.java

@@ -22,6 +22,10 @@ class TomlParser {
     for (int i = index.get(); i < tomlString.length(); i = index.incrementAndGet()) {
       char c = tomlString.charAt(i);
       
+      if (results.errors.hasErrors()) {
+        break;
+      }
+
       if (c == '#' && !inComment) {
         inComment = true;
       } else if (!Character.isWhitespace(c) && !inComment && identifier == null) {

src/test/java/com/moandjiezana/toml/InlineTableTest.java

@@ -131,6 +131,13 @@ public class InlineTableTest {
     assertEquals("gh]\"i", strings.getString("multiline_literal"));
   }
   
+  @Test
+  public void should_read_inline_table_in_regular_table() throws Exception {
+    Toml toml = new Toml().parse("[tbl]\n tbl = { tbl = 1 }");
+    
+    assertEquals(1, toml.getLong("tbl.tbl.tbl").intValue());
+  }
+  
   @Test(expected = IllegalStateException.class)
   public void should_fail_on_invalid_key() throws Exception {
     new Toml().parse("tbl = { a. = 1 }");
@@ -145,4 +152,20 @@ public class InlineTableTest {
   public void should_fail_on_invalid_value() throws Exception {
     new Toml().parse("tbl = { a = abc }");
   }
+  
+  @Test
+  public void should_fail_when_key_duplicated_inside_inline_table() throws Exception {
+    e.expect(IllegalStateException.class);
+    e.expectMessage("Duplicate key on line 1: a");
+    
+    new Toml().parse("tbl = { a = 1, a = 2 }");
+  }
+  
+  @Test
+  public void should_fail_when_key_duplicated_by_other_key() throws Exception {
+    e.expect(IllegalStateException.class);
+    e.expectMessage("Duplicate key: tbl");
+    
+    new Toml().parse("tbl = { a = 1 }\n tbl = 1");
+  }
 }