Fix parsing trailing tabs in .sym file format

Author: waleedyaseen

CHANGELOG.md

@@ -20,6 +20,7 @@
 - Fix type checking for expression lists.
 - Fix type checking when there is a type error.
 - Fix type checking for varbit game variables.
+- Fix parsing trailing tabs in .sym file format.
 
 ## [1.2.0] - 2023-08-18
 

src/main/gen/io/runescript/plugin/symbollang/parser/RsSymParser.java

@@ -61,7 +61,7 @@ static boolean File(PsiBuilder b, int l) {
   }
 
   /* ********************************************************** */
-  // Field '\t' Field ('\t' Field)* '\n'
+  // Field '\t' Field ('\t' Field)* '\t'* '\n'
   public static boolean Symbol(PsiBuilder b, int l) {
     if (!recursion_guard_(b, l, "Symbol")) return false;
     if (!nextTokenIs(b, STRING)) return false;
@@ -71,6 +71,7 @@ public static boolean Symbol(PsiBuilder b, int l) {
     r = r && consumeToken(b, TAB);
     r = r && Field(b, l + 1);
     r = r && Symbol_3(b, l + 1);
+    r = r && Symbol_4(b, l + 1);
     r = r && consumeToken(b, NEW_LINE);
     exit_section_(b, m, SYMBOL, r);
     return r;
@@ -98,4 +99,15 @@ private static boolean Symbol_3_0(PsiBuilder b, int l) {
     return r;
   }
 
+  // '\t'*
+  private static boolean Symbol_4(PsiBuilder b, int l) {
+    if (!recursion_guard_(b, l, "Symbol_4")) return false;
+    while (true) {
+      int c = current_position_(b);
+      if (!consumeToken(b, TAB)) break;
+      if (!empty_element_parsed_guard_(b, "Symbol_4", c)) break;
+    }
+    return true;
+  }
+
 }

src/main/grammars/Symbol.bnf

@@ -22,7 +22,7 @@
 }
 
 File ::= Symbol*
-Symbol ::= Field '\t' Field ('\t' Field)* '\n' {
+Symbol ::= Field '\t' Field ('\t' Field)* '\t'* '\n' {
     mixin="io.runescript.plugin.symbollang.psi.mixin.RsSymSymbolMixin"
     stubClass="io.runescript.plugin.symbollang.psi.stub.RsSymSymbolStub"
     elementTypeFactory="io.runescript.plugin.symbollang.psi.stub.RsSymStubElementFactory.create"