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Add support for list reference assignments

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RFC: https://wiki.php.net/rfc/list_reference_assignment
This commit is contained in:
Nikita Popov 2018-03-10 16:48:20 +01:00
parent 91a462ce76
commit 7f8ff1b9a4
4 changed files with 568 additions and 459 deletions
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1
CHANGELOG.md
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@ -4,6 +4,7 @@ Version 4.0.1-dev
### Added
* [PHP 7.3] Added support for trailing commas in function calls.
* [PHP 7.3] Added support for by-reference array destructuring.
* Added checks to node traverser to prevent replacing a statement with an expression or vice versa.
This should prevent common mistakes in the implementation of node visitors.
* Added the following method to `BuilderFactory`, to simplify creation of expressions:

2
grammar/php7.y
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@ -929,8 +929,10 @@ list_expr_elements:
list_expr_element:
variable { $$ = Expr\ArrayItem[$1, null, false]; }
| '&' variable { $$ = Expr\ArrayItem[$2, null, true]; }
| list_expr { $$ = Expr\ArrayItem[$1, null, false]; }
| expr T_DOUBLE_ARROW variable { $$ = Expr\ArrayItem[$3, $1, false]; }
| expr T_DOUBLE_ARROW '&' variable { $$ = Expr\ArrayItem[$4, $1, true]; }
| expr T_DOUBLE_ARROW list_expr { $$ = Expr\ArrayItem[$3, $1, false]; }
| /* empty */ { $$ = null; }
;

936
lib/PhpParser/Parser/Php7.php
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File diff suppressed because it is too large Load Diff

88
test/code/parser/expr/listReferences.test Normal file
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@ -0,0 +1,88 @@
List reference assignments (PHP 7.3)
-----
<?php
list(&$v) = $x;
list('k' => &$v) = $x;
[&$v] = $x;
['k' => &$v] = $x;
-----
!!php7
array(
0: Stmt_Expression(
expr: Expr_Assign(
var: Expr_List(
items: array(
0: Expr_ArrayItem(
key: null
value: Expr_Variable(
name: v
)
byRef: true
)
)
)
expr: Expr_Variable(
name: x
)
)
)
1: Stmt_Expression(
expr: Expr_Assign(
var: Expr_List(
items: array(
0: Expr_ArrayItem(
key: Scalar_String(
value: k
)
value: Expr_Variable(
name: v
)
byRef: true
)
)
)
expr: Expr_Variable(
name: x
)
)
)
2: Stmt_Expression(
expr: Expr_Assign(
var: Expr_Array(
items: array(
0: Expr_ArrayItem(
key: null
value: Expr_Variable(
name: v
)
byRef: true
)
)
)
expr: Expr_Variable(
name: x
)
)
)
3: Stmt_Expression(
expr: Expr_Assign(
var: Expr_Array(
items: array(
0: Expr_ArrayItem(
key: Scalar_String(
value: k
)
value: Expr_Variable(
name: v
)
byRef: true
)
)
)
expr: Expr_Variable(
name: x
)
)
)
)