Fixed syntax error for files ending on non-empty line

README.md

@@ -71,9 +71,10 @@ make it work with JUnit 5. Feel free to use the code (in package ```de.platon42.
 
 ### V0.2 (unreleased)
 
-- Added (same) icon for plugin as for file type.
+- Cosmetics: Added (same) icon for plugin as for file type.
 - Performance improvement: Use Word-Index for global labels and symbols instead of iterating over the file.
 - Performance improvement: Use Stub-Index for global labels and symbols.
+- Bugfix: No longer reports a syntax error when file lacks terminating End-Of-Line
 
 ### V0.1 (20-Jul-21)
 

build.gradle

@@ -48,9 +48,10 @@ patchPluginXml {
     setChangeNotes("""
   <h4>V0.2 (xx-Jul-21)</h4>
     <ul>
-      <li>Added (same) icon for plugin as for file type.
+      <li>Cosmetics: Added (same) icon for plugin as for file type.
       <li>Performance improvement: Use Word-Index for global labels and symbols instead of iterating over the file.
       <li>Performance improvement: Use Stub-Index for global labels and symbols.
+      <li>Bugfix: No longer reports a syntax error when file lacks terminating End-Of-Line
     </ul>
   <h4>V0.1 (20-Jul-21)</h4>
     <ul>

src/main/gen/de/platon42/intellij/plugins/m68k/parser/M68kParser.java

@@ -1051,14 +1051,14 @@ public class M68kParser implements PsiParser, LightPsiParser {
     }
 
     /* ********************************************************** */
-    // !<<eof>> statement EOL
+    // !<<eof>> statement (<<eof>>|EOL)
     static boolean line(PsiBuilder b, int l) {
         if (!recursion_guard_(b, l, "line")) return false;
         boolean r;
         Marker m = enter_section_(b);
         r = line_0(b, l + 1);
         r = r && statement(b, l + 1);
-        r = r && consumeToken(b, EOL);
+        r = r && line_2(b, l + 1);
         exit_section_(b, m, null, r);
         return r;
     }
@@ -1073,6 +1073,17 @@ public class M68kParser implements PsiParser, LightPsiParser {
         return r;
     }
 
+    // <<eof>>|EOL
+    private static boolean line_2(PsiBuilder b, int l) {
+        if (!recursion_guard_(b, l, "line_2")) return false;
+        boolean r;
+        Marker m = enter_section_(b);
+        r = eof(b, l + 1);
+        if (!r) r = consumeToken(b, EOL);
+        exit_section_(b, m, null, r);
+        return r;
+    }
+
     /* ********************************************************** */
     // Assignment
     //             | PreprocessorDirective

src/main/java/de/platon42/intellij/plugins/m68k/m68k.bnf

@@ -118,7 +118,7 @@
 
 M68kFile ::= line*
 
-private line ::= !<<eof>> statement EOL
+private line ::= !<<eof>> statement (<<eof>>|EOL)
 
 statement ::= (Assignment
             | PreprocessorDirective

src/test/java/de/platon42/intellij/plugins/m68k/parser/BasicAsmInstTest.kt

@@ -13,13 +13,14 @@ internal class BasicAsmInstTest : AbstractParsingTest() {
     @ParserResultFile("basic_block_of_code")
     internal fun parser_can_parse_basic_block_of_code(@MyTestCase testCase: ParsingTestExtension.IParsingTestCase) {
         testGoodSyntax(
-                testCase, "\tadd.l d0,d0\n"
+            testCase, "\tadd.l d0,d0\n"
-                + "\tmoveq #10,d1\n"
+                    + "\tmoveq #10,d1\n"
-                + " rts\n"
+                    + " rts\n"
-                + "\n"
+                    + "\n"
-                + "; comment\n"
+                    + "; comment\n"
-                + "    jmp\tresetcode ; unreachable\n"
+                    + "    jmp\tresetcode ; unreachable\n"
-                + "  \n"
+                    + "  \n"
+                    + "eoflabel"
         )
     }
 }

src/test/resources/parser/basic/basic_block_of_code.txt

@@ -53,4 +53,7 @@ Assembly File: a.asm
   PsiComment(M68kTokenType.COMMENT)('; unreachable')
   PsiElement(M68kTokenType.EOL)('\n')
   PsiWhiteSpace('  ')
-  PsiWhiteSpace('\n')
+  PsiWhiteSpace('\n')
+  M68kStatementImpl(STATEMENT)
+    M68kGlobalLabelImpl(GLOBAL_LABEL)
+      PsiElement(M68kTokenType.GLOBAL_LABEL_DEF)('eoflabel')