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Add parens for new/instanceof with complex expression

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This is not fully accurate because the rules for "new variables"
are different than the rules for dereferenceable LHS.
This commit is contained in:
Nikita Popov 2020-08-09 22:06:34 +02:00
parent feb6bf7a0c
commit 8bcaa4261e
3 changed files with 25 additions and 6 deletions
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13
lib/PhpParser/PrettyPrinter/Standard.php
View File

@ -387,7 +387,10 @@ class Standard extends PrettyPrinterAbstract
}
protected function pExpr_Instanceof(Expr\Instanceof_ $node) {
return $this->pInfixOp(Expr\Instanceof_::class, $node->expr, ' instanceof ', $node->class);
list($precedence, $associativity) = $this->precedenceMap[Expr\Instanceof_::class];
return $this->pPrec($node->expr, $precedence, $associativity, -1)
. ' instanceof '
. $this->pNewVariable($node->class);
}
// Unary expressions
@ -635,7 +638,8 @@ class Standard extends PrettyPrinterAbstract
$args = $node->args ? '(' . $this->pMaybeMultiline($node->args) . ')' : '';
return 'new ' . $this->pClassCommon($node->class, $args);
}
return 'new ' . $this->p($node->class) . '(' . $this->pMaybeMultiline($node->args) . ')';
return 'new ' . $this->pNewVariable($node->class)
. '(' . $this->pMaybeMultiline($node->args) . ')';
}
protected function pExpr_Clone(Expr\Clone_ $node) {
@ -1008,6 +1012,11 @@ class Standard extends PrettyPrinterAbstract
}
}
protected function pNewVariable(Node $node) {
// TODO: This is not fully accurate.
return $this->pDereferenceLhs($node);
}
/**
* @param Node[] $nodes
* @return bool

7
lib/PhpParser/PrettyPrinterAbstract.php
View File

@ -1127,7 +1127,7 @@ abstract class PrettyPrinterAbstract
Expr\PostDec::class => ['var' => self::FIXUP_PREC_LEFT],
Expr\Instanceof_::class => [
'expr' => self::FIXUP_PREC_LEFT,
'class' => self::FIXUP_PREC_RIGHT,
'class' => self::FIXUP_PREC_RIGHT, // TODO: FIXUP_NEW_VARIABLE
],
Expr\Ternary::class => [
'cond' => self::FIXUP_PREC_LEFT,
@ -1137,6 +1137,8 @@ abstract class PrettyPrinterAbstract
Expr\FuncCall::class => ['name' => self::FIXUP_CALL_LHS],
Expr\StaticCall::class => ['class' => self::FIXUP_DEREF_LHS],
Expr\ArrayDimFetch::class => ['var' => self::FIXUP_DEREF_LHS],
Expr\ClassConstFetch::class => ['var' => self::FIXUP_DEREF_LHS],
Expr\New_::class => ['class' => self::FIXUP_DEREF_LHS], // TODO: FIXUP_NEW_VARIABLE
Expr\MethodCall::class => [
'var' => self::FIXUP_DEREF_LHS,
'name' => self::FIXUP_BRACED_NAME,
@ -1157,9 +1159,6 @@ abstract class PrettyPrinterAbstract
'var' => self::FIXUP_DEREF_LHS,
'name' => self::FIXUP_BRACED_NAME,
],
Expr\ClassConstFetch::class => [
'var' => self::FIXUP_DEREF_LHS,
],
Scalar\Encapsed::class => [
'parts' => self::FIXUP_ENCAPSED,
],

11
test/code/prettyPrinter/expr/newVariable.test Normal file
View File

@ -0,0 +1,11 @@
Parentheses for complex new/instanceof expressions
-----
<?php
new ('a' . 'b');
$x instanceof ('a' . 'b');
$x instanceof ($y++);
-----
!!php7
new ('a' . 'b')();
$x instanceof ('a' . 'b');
$x instanceof ($y++);