fix context evaluation (#4)

* add test for issue #2

* fix context evaluation

Author: dirx

lib/Context.php

@@ -137,7 +137,7 @@ public function evaluate(?Token $expr): Token {
             switch ($expr->type) {
                 case Token::IDENTIFIER:
                     if ($this->isDefined($expr->value)) {
-                        return $this->evaluate(...$this->definitions[$expr->value]);
+                        return $this->evaluate($this->definitions[$expr->value]);
                     }
                     return new Token(Token::NUMBER, '0', 'computed');
             }

test/cases/c/issue_2.phpt

@@ -0,0 +1,14 @@
+--TEST--
+Test for issue #2
+--FILE--
+
+#ifndef TEST
+#define TEST 1
+#endif
+
+#if TEST
+int bar;
+#endif
+
+--EXPECT--
+int bar;

test/generated/c/issue_2Test.c

@@ -0,0 +1,9 @@
+
+#ifndef TEST
+#define TEST 1
+#endif
+
+#if TEST
+int bar;
+#endif
+

test/generated/c/issue_2Test.php

@@ -0,0 +1,34 @@
+<?php declare(strict_types=1);
+namespace PHPCParser\Test\c;
+use PHPCParser\CParser;
+use PHPCParser\Printer;
+use PHPCParser\Printer\Dumper;
+use PHPCParser\Printer\C;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Note: this is a generated file, do not edit this!!!
+ */
+class issue_2Test extends TestCase {
+
+    const EXPECTED = 'int bar;';
+
+    protected CParser $parser;
+    protected Printer $printer;
+
+    public function setUp(): void {
+        $this->parser = new CParser;
+        $this->parser->addSearchPath(__DIR__);
+        $this->parser->addSearchPath(__DIR__ . '/../../include');
+        $this->printer = new C;
+    }
+
+    /**
+     * @textdox Test for issue #2
+     */
+    public function testCode() {
+        $translationUnit = $this->parser->parse(__DIR__ . '/issue_2Test.c');
+        $actual = $this->printer->print($translationUnit);
+        $this->assertEquals(self::EXPECTED, trim($actual));
+    }
+}