Merge pull request #357 from susliko/better-semicolons

Better semicolons

corpus/definitions.txt

@@ -418,6 +418,12 @@ object O4 extends {
   val a: A = b
 }
 
+object O5 {
+  ;;
+  ;
+  ;
+}
+
 --------------------------------------------------------------------------------
 
 (compilation_unit
@@ -440,7 +446,10 @@ object O4 extends {
         (val_definition
           (identifier)
           (type_identifier)
-          (identifier))))))
+          (identifier)))))
+  (object_definition
+    (identifier)
+    (template_body)))
 
 ================================================================================
 Object definitions

corpus/expressions.txt

@@ -323,7 +323,7 @@ class C {
 def other() {
   if (a) {
     b
-  }
+  };
   else c()
 }
 
@@ -669,6 +669,8 @@ def matchTest(x: Int): String = x match {
   case 3 => {
     "3"
   }
+  case 4 => 
+    ;
   case A if a == 1 =>
   case A if a == 2 => 2
   case ((i, _)) => i
@@ -706,6 +708,8 @@ def matchTest(x: Int): String = x match {
           (integer_literal)
           (block
             (string)))
+        (case_clause
+          (integer_literal))
         (case_clause
           (identifier)
           (guard

grammar.js

@@ -780,7 +780,7 @@ module.exports = grammar({
         seq(
           sep1(
             $._semicolon,
-            choice($.expression, $._definition, $._end_marker),
+            choice($.expression, $._definition, $._end_marker, ";"),
           ),
           optional($._semicolon),
         ),
@@ -1106,16 +1106,20 @@ module.exports = grammar({
         ),
       ),
 
+    /*
+     *  ::=  [‘inline’] ‘if’ ‘(’ Expr ‘)’ {nl} Expr [[semi] ‘else’ Expr]
+     *    |  [‘inline’] ‘if’  Expr ‘then’ Expr [[semi] ‘else’ Expr]
+     */
     if_expression: $ =>
-      prec.right(
-        PREC.control,
-        seq(
-          optional($.inline_modifier),
-          "if",
-          field("condition", $._if_condition),
-          field("consequence", $._indentable_expression),
-          optional(seq("else", field("alternative", $._indentable_expression))),
-        ),
+      seq(
+        optional($.inline_modifier),
+        "if",
+        field("condition", $._if_condition),
+        field("consequence", $._indentable_expression),
+        optional(seq(
+          optional(";"),
+          "else",
+          field("alternative", $._indentable_expression))),
       ),
 
     // NOTE(susliko): _if_condition and its magic dynamic precedence were introduced as a fix to

script/smoke_test.sh

@@ -4,7 +4,7 @@
 
 SCALA_SCALA_LIBRARY_EXPECTED=100
 SCALA_SCALA_COMPILER_EXPECTED=96
-DOTTY_COMPILER_EXPECTED=84
+DOTTY_COMPILER_EXPECTED=85
 SYNTAX_COMPLEXITY_CEILING=1400
 
 if [ ! -d "$SCALA_SCALA_DIR" ]; then