Make the output version of the pipe AST look like a pipe, not the desugared version.

Author: Crell

Zend/tests/pipe_operator/ast.phpt

@@ -0,0 +1,14 @@
+--TEST--
+Test that a pipe operator displays as a pipe operator when outputting syntax.
+--FILE--
+<?php
+
+function _test(int $a): int {
+    return $a + 1;
+}
+
+assert((5 |> '_test') == 99);
+
+?>
+--EXPECTF--
+Warning: assert(): assert(5 |> \_test == 99) failed in %s on line %d

Zend/zend_ast.c

@@ -1707,10 +1707,17 @@ static ZEND_COLD void zend_ast_export_ex(smart_str *str, zend_ast *ast, int prio
 			zend_ast_export_var(str, ast->child[1], 0, indent);
 			break;
 		case ZEND_AST_CALL:
-			zend_ast_export_ns_name(str, ast->child[0], 0, indent);
-			smart_str_appendc(str, '(');
-			zend_ast_export_ex(str, ast->child[1], 0, indent);
-			smart_str_appendc(str, ')');
+			if (ast->attr & ZEND_CALL_SYNTAX_PIPE) {
+				zend_ast_export_ex(str, ast->child[1], 0, indent);
+				smart_str_appends(str, " |> ");
+				zend_ast_export_ns_name(str, ast->child[0], 0, indent);
+			}
+			else {
+				zend_ast_export_ns_name(str, ast->child[0], 0, indent);
+				smart_str_appendc(str, '(');
+				zend_ast_export_ex(str, ast->child[1], 0, indent);
+				smart_str_appendc(str, ')');
+			}
 			break;
 		case ZEND_AST_CLASS_CONST:
 			zend_ast_export_ns_name(str, ast->child[0], 0, indent);