Merge pull request #67 from Gedochao/maintenance/remove-comments-support

Remove `/* (...) */` comments support

Author: tgodzik

src/main/java/com/virtuslab/using_directives/custom/Scanner.java

@@ -188,7 +188,7 @@ private boolean doFetchToken() {
       reader.nextChar();
       getOperatorRest();
     } else if (ch == '/') {
-      if (skipComment()) return true;
+      if (skipLine()) return true;
       else {
         putChar('/');
         getOperatorRest();
@@ -272,46 +272,18 @@ private boolean doFetchToken() {
   }
 
   // Unsupported: Keeping comments
-  private boolean skipComment() {
+  private boolean skipLine() {
     Runnable skipLine =
         () -> {
           reader.nextChar();
           while (reader.ch != CR && reader.ch != LF && reader.ch != SU) {
             reader.nextChar();
           }
         };
-    Runnable skipComment =
-        () -> {
-          int nested = 0;
-          boolean flag = true;
-          while (flag) {
-            if (reader.ch == '/') {
-              reader.nextChar();
-              if (reader.ch == '*') {
-                nested += 1;
-                reader.nextChar();
-              }
-            } else if (reader.ch == '*') {
-              reader.nextChar();
-              if (reader.ch == '/') {
-                if (nested > 0) {
-                  nested -= 1;
-                } else flag = false;
-                reader.nextChar();
-              }
-            } else {
-              reader.nextChar();
-            }
-          }
-        };
     reader.nextChar();
     if (reader.ch == '/') {
       skipLine.run();
       return true;
-    } else if (reader.ch == '*') {
-      reader.nextChar();
-      skipComment.run();
-      return true;
     } else {
       return false;
     }
@@ -378,7 +350,7 @@ public void getOperatorRest() {
         break;
       case '/':
         char nxch = reader.lookaheadChar();
-        if (nxch == '/' || nxch == '*') finishNamed(Tokens.IDENTIFIER, td);
+        if (nxch == '/') finishNamed(Tokens.IDENTIFIER, td);
         else {
           putChar(reader.ch);
           reader.nextChar();

src/test/java/com/virtuslab/using_directives/parser/ParserUnitTest.java

@@ -187,4 +187,23 @@ public void testListJustComma() {
     assertValueListSize(parsedDirective, "keyA", 1);
     assertValueListAtPath(parsedDirective, "keyA", List.of("0,2,3"));
   }
+
+  @Test
+  public void testAsterisksAndSlashes() {
+    String input = "//> using exclude */*/Foo.scala";
+    UsingDirectives parsedDirective = testCode(1, input);
+    assertValueListSize(parsedDirective, "exclude", 1);
+    assertValueListAtPath(parsedDirective, "exclude", List.of("*/*/Foo.scala"));
+  }
+
+  @Test
+  public void oldCommentsArentSkipped() {
+    String input = "//> using /* comment1 */ notTheKeyActually /* comment2 */ 42";
+    UsingDirectives parsedDirective = testCode(1, input);
+    assertValueListSize(parsedDirective, "/*", 7);
+    assertValueListAtPath(
+        parsedDirective,
+        "/*",
+        List.of("comment1", "*/", "notTheKeyActually", "/*", "comment2", "*/", "42"));
+  }
 }