Blast off to space.

Author: hikari-no-yume

NEWS

@@ -38,6 +38,7 @@
     context. (Nikita)
   . Removed support for #-style comments in ini files. (Nikita)
   . Invalid octal literals in source code now produce compile errors, fixes PHPSadness #31. (Andrea)
+  . Added <=> operator. (Andrea)
 
 - Date:
   . Fixed day_of_week function as it could sometimes return negative values

UPGRADING

@@ -98,6 +98,7 @@ PHP X.Y UPGRADE NOTES
   . Added \u{xxxxxx} Unicode Codepoint Escape Syntax for double-quoted strings
     and heredocs.
   . define() now supports arrays as constant values, fixing an oversight where define() did not support arrays yet const syntax did.
+  . Added the comparison operator (<=>), aka the spaceship operator.
 
 ========================================
 3. Changes in SAPI modules

Zend/zend_language_parser.y

@@ -76,7 +76,7 @@ static YYSIZE_T zend_yytnamerr(char*, const char*);
 %left '^'
 %left '&'
 %nonassoc T_IS_EQUAL T_IS_NOT_EQUAL T_IS_IDENTICAL T_IS_NOT_IDENTICAL
-%nonassoc '<' T_IS_SMALLER_OR_EQUAL '>' T_IS_GREATER_OR_EQUAL
+%nonassoc '<' T_IS_SMALLER_OR_EQUAL '>' T_IS_GREATER_OR_EQUAL T_SPACESHIP
 %left T_SL T_SR
 %left '+' '-' '.'
 %left '*' '/' '%'
@@ -131,6 +131,7 @@ static YYSIZE_T zend_yytnamerr(char*, const char*);
 %token T_IS_NOT_IDENTICAL "!== (T_IS_NOT_IDENTICAL)"
 %token T_IS_SMALLER_OR_EQUAL "<= (T_IS_SMALLER_OR_EQUAL)"
 %token T_IS_GREATER_OR_EQUAL ">= (T_IS_GREATER_OR_EQUAL)"
+%token T_SPACESHIP "<=> (T_SPACESHIP)"
 %token T_SL "<< (T_SL)"
 %token T_SR ">> (T_SR)"
 %token T_INSTANCEOF  "instanceof (T_INSTANCEOF)"
@@ -842,6 +843,8 @@ expr_without_variable:
 			{ $$ = zend_ast_create(ZEND_AST_GREATER, $1, $3); }
 	|	expr T_IS_GREATER_OR_EQUAL expr
 			{ $$ = zend_ast_create(ZEND_AST_GREATER_EQUAL, $1, $3); }
+	|	expr T_SPACESHIP expr
+			{ $$ = zend_ast_create_binary_op(ZEND_SPACESHIP, $1, $3); }
 	|	expr T_INSTANCEOF class_name_reference
 			{ $$ = zend_ast_create(ZEND_AST_INSTANCEOF, $1, $3); }
 	|	'(' expr ')' { $$ = $2; }