Define AST node for partial placeholder value, the questionmark.

Crell · Crell · commit 5b5b7637d6b9 · 2020-05-22T15:43:45.000-05:00
diff --git a/Zend/zend_ast.h b/Zend/zend_ast.h
@@ -67,6 +67,7 @@ enum _zend_ast_kind {
 	ZEND_AST_MAGIC_CONST = 0 << ZEND_AST_NUM_CHILDREN_SHIFT,
 	ZEND_AST_TYPE,
 	ZEND_AST_CONSTANT_CLASS,
+	ZEND_AST_PARTIAL_PLACEHOLDER,
 
 	/* 1 child node */
 	ZEND_AST_VAR = 1 << ZEND_AST_NUM_CHILDREN_SHIFT,
diff --git a/Zend/zend_language_parser.y b/Zend/zend_language_parser.y
@@ -716,6 +716,7 @@ non_empty_argument_list:
 argument:
 		expr			{ $$ = $1; }
 	|	T_ELLIPSIS expr	{ $$ = zend_ast_create(ZEND_AST_UNPACK, $2); }
+	|   '?'				{ $$ = zend_ast_create(ZEND_AST_PARTIAL_PLACEHOLDER); }
 ;
 
 global_var_list:

Original file line number	Diff line number	Diff line change
`@@ -716,6 +716,7 @@ non_empty_argument_list:`
`716`	`716`	`argument:`
`717`	`717`	`expr { $$ = $1; }`
`718`	`718`	`\| T_ELLIPSIS expr { $$ = zend_ast_create(ZEND_AST_UNPACK, $2); }`
	`719`	`+ \| '?' { $$ = zend_ast_create(ZEND_AST_PARTIAL_PLACEHOLDER); }`
`719`	`720`	`;`
`720`	`721`
`721`	`722`	`global_var_list:`