cgen: fix error of match expr (fix #16554) (#16555)

vlib/v/gen/c/infix.v

@@ -830,6 +830,26 @@ fn (mut g Gen) infix_expr_and_or_op(node ast.InfixExpr) {
 			return
 		}
 		g.inside_ternary = prev_inside_ternary
+	} else if node.right is ast.MatchExpr {
+		// `b := a && match true { true { a = false ...} else {...}}`
+		prev_inside_ternary := g.inside_ternary
+		g.inside_ternary = 0
+		if g.need_tmp_var_in_match(node.right) {
+			tmp := g.new_tmp_var()
+			cur_line := g.go_before_stmt(0).trim_space()
+			g.empty_line = true
+			g.write('bool ${tmp} = (')
+			g.expr(node.left)
+			g.writeln(');')
+			g.set_current_pos_as_last_stmt_pos()
+			g.write('${cur_line} ${tmp} ${node.op.str()} ')
+			g.infix_left_var_name = if node.op == .and { tmp } else { '!${tmp}' }
+			g.expr(node.right)
+			g.infix_left_var_name = ''
+			g.inside_ternary = prev_inside_ternary
+			return
+		}
+		g.inside_ternary = prev_inside_ternary
 	} else if g.need_tmp_var_in_array_call(node.right) {
 		// `if a == 0 || arr.any(it.is_letter()) {...}`
 		tmp := g.new_tmp_var()

vlib/v/tests/match_expr_in_infix_expr_test.v

@@ -0,0 +1,16 @@
+fn test_match_expr_in_infix_expr() {
+	mut a := true
+	b := a && match true {
+		true {
+			a = false
+			true
+		}
+		false {
+			false
+		}
+	}
+	println(a)
+	assert a == false
+	println(b)
+	assert b == true
+}