PY-48008 Report missing subject expression in match statements

GitOrigin-RevId: 2c49ea19ac0fb5bdda966e4077c45321c397df8a

python/python-psi-impl/src/com/jetbrains/python/parsing/StatementParsing.java

@@ -147,7 +147,7 @@ public class StatementParsing extends Parsing implements ITokenTypeRemapper {
     SyntaxTreeBuilder.Marker mark = myBuilder.mark();
     myBuilder.remapCurrentToken(PyTokenTypes.MATCH_KEYWORD);
     myBuilder.advanceLexer();
-    myContext.getExpressionParser().parseTupleExpression(true, false, false);
+    myContext.getExpressionParser().parseExpression();
     if (!matchToken(PyTokenTypes.COLON)) {
       mark.rollbackTo();
       myBuilder.remapCurrentToken(PyTokenTypes.IDENTIFIER);

python/testData/psi/PatternMatchingRecoveryNoSubjectAfterMatch.py

@@ -0,0 +1,3 @@
+match:
+    case 1:
+        pass

python/testData/psi/PatternMatchingRecoveryNoSubjectAfterMatch.txt

@@ -0,0 +1,18 @@
+PyFile:PatternMatchingRecoveryNoSubjectAfterMatch.py
+  PyMatchStatement
+    PsiElement(Py:MATCH_KEYWORD)('match')
+    PsiErrorElement:Expression expected
+      <empty list>
+    PsiElement(Py:COLON)(':')
+    PsiWhiteSpace('\n    ')
+    PyCaseClause
+      PsiElement(Py:CASE_KEYWORD)('case')
+      PsiWhiteSpace(' ')
+      PyLiteralPattern
+        PyNumericLiteralExpression
+          PsiElement(Py:INTEGER_LITERAL)('1')
+      PsiElement(Py:COLON)(':')
+      PsiWhiteSpace('\n        ')
+      PyStatementList
+        PyPassStatement
+          PsiElement(Py:PASS_KEYWORD)('pass')

python/testSrc/com/jetbrains/python/parsing/PythonParsingTest.java

@@ -986,6 +986,10 @@ public class PythonParsingTest extends ParsingTestCase {
     doTest(LanguageLevel.PYTHON310);
   }
 
+  public void testPatternMatchingRecoveryNoSubjectAfterMatch() {
+    doTest(LanguageLevel.PYTHON310);
+  }
+
   public void testPatternMatchingRecoveryNoPatternAfterCase() {
     doTest(LanguageLevel.PYTHON310);
   }