Add newline in UI before lexing/parsing

Fixes JMU-CS#87 in the UI by avoiding EOL/EOF issues with ANTLR: https://www.antlr3.org/pipermail/antlr-interest/2011-January/040642.html
lam2mo · Feb 21, 2020 · 8b96948 · 8b96948
1 parent f7455aa
commit 8b96948
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/main/java/com/github/lessjava/LJUI.java b/src/main/java/com/github/lessjava/LJUI.java
@@ -94,6 +94,10 @@ public void actionPerformed(ActionEvent e)
 
     public String compile(String code)
     {
+        // add newline to avoid EOL/EOF issues w/ ANTLR:
+        //   https://www.antlr3.org/pipermail/antlr-interest/2011-January/040642.html
+        code += "\n";
+
         // lexing and parsing (TODO: report errors in UI)
         LJLexer lexer = new LJLexer(new ANTLRInputStream(code));
         LJParser parser = new LJParser(new CommonTokenStream(lexer));