parser: fix infix expr handling with cast on left side of << operator (…

…#19985)

vlib/v/parser/expr.v

@@ -549,7 +549,7 @@ fn (mut p Parser) expr_with_left(left ast.Expr, precedence int, is_stmt_ident bo
 			} else {
 				return node
 			}
-		} else if p.tok.kind == .left_shift && p.is_stmt_ident {
+		} else if node !is ast.CastExpr && p.tok.kind == .left_shift && p.is_stmt_ident {
 			// arr << elem
 			tok := p.tok
 			mut pos := tok.pos()

vlib/v/tests/cast_precedence_test.v

@@ -0,0 +1,12 @@
+fn test_main() {
+	assert (u8(1) << 1 | 1) == 3
+	assert (match 0 {
+		0 { u8(1) << 1 | 1 }
+		else { 0 }
+	}) == 3
+	assert (if true {
+		u8(1) << 1 | 1
+	} else {
+		0
+	}) == 3
+}