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Add a linter rule for default parameters
Summary: Ref T7409. Adds `ArcanistXHPASTLinter::LINT_DEFAULT_PARAMETERS` for ensuring function/method parameters with a default value are declared after those without a default value. Based on [[https://github.com/squizlabs/PHP_CodeSniffer/blob/master/CodeSniffer/Standards/PEAR/Sniffs/Functions/ValidDefaultValueSniff.php | PEAR_Sniffs_Functions_ValidDefaultValueSniff]]. Test Plan: Added test cases. Reviewers: epriestley, #blessed_reviewers Reviewed By: epriestley, #blessed_reviewers Subscribers: Korvin, epriestley Maniphest Tasks: T7409 Differential Revision: https://secure.phabricator.com/D12418
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3 changed files with 46 additions and 3 deletions
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@ -59,6 +59,7 @@ final class ArcanistXHPASTLinter extends ArcanistBaseXHPASTLinter {
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const LINT_SELF_MEMBER_REFERENCE = 57;
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const LINT_LOGICAL_OPERATORS = 58;
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const LINT_INNER_FUNCTION = 59;
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const LINT_DEFAULT_PARAMETERS = 60;
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private $blacklistedFunctions = array();
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private $naminghook;
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@ -185,6 +186,8 @@ final class ArcanistXHPASTLinter extends ArcanistBaseXHPASTLinter {
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=> pht('Logical Operators'),
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self::LINT_INNER_FUNCTION
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=> pht('Inner Functions'),
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self::LINT_DEFAULT_PARAMETERS
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=> pht('Default Parameters'),
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);
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}
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@ -232,6 +235,7 @@ final class ArcanistXHPASTLinter extends ArcanistBaseXHPASTLinter {
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self::LINT_SELF_MEMBER_REFERENCE => $advice,
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self::LINT_LOGICAL_OPERATORS => $advice,
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self::LINT_INNER_FUNCTION => $warning,
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self::LINT_DEFAULT_PARAMETERS => $warning,
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);
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}
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@ -299,7 +303,7 @@ final class ArcanistXHPASTLinter extends ArcanistBaseXHPASTLinter {
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public function getVersion() {
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// The version number should be incremented whenever a new rule is added.
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return '22';
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return '23';
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}
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protected function resolveFuture($path, Future $future) {
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@ -385,6 +389,7 @@ final class ArcanistXHPASTLinter extends ArcanistBaseXHPASTLinter {
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'lintSelfMemberReference' => self::LINT_SELF_MEMBER_REFERENCE,
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'lintLogicalOperators' => self::LINT_LOGICAL_OPERATORS,
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'lintInnerFunctions' => self::LINT_INNER_FUNCTION,
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'lintDefaultParameters' => self::LINT_DEFAULT_PARAMETERS,
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);
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foreach ($method_codes as $method => $codes) {
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@ -3650,6 +3655,32 @@ final class ArcanistXHPASTLinter extends ArcanistBaseXHPASTLinter {
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}
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}
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private function lintDefaultParameters(XHPASTNode $root) {
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$parameter_lists = $root->selectDescendantsOfType(
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'n_DECLARATION_PARAMETER_LIST');
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foreach ($parameter_lists as $parameter_list) {
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$default_found = false;
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$parameters = $parameter_list->selectDescendantsOfType(
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'n_DECLARATION_PARAMETER');
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foreach ($parameters as $parameter) {
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$default_value = $parameter->getChildByIndex(2);
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if ($default_value->getTypeName() != 'n_EMPTY') {
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$default_found = true;
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} else if ($default_found) {
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$this->raiseLintAtNode(
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$parameter_list,
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self::LINT_DEFAULT_PARAMETERS,
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pht(
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'Arguments with default values must be at the end '.
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'of the argument list.'));
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}
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}
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}
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}
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/**
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* Retrieve all calls to some specified function(s).
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*
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@ -0,0 +1,12 @@
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<?php
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function foo($x, $y, $z) {}
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function bar($x, $y = null, $z) {}
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function baz($x = null, $y = null, $z = null) {}
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class MyClass {
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public function myMethod($x, $y = null, $z) {}
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}
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~~~~~~~~~~
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warning:3:13
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error:6:7
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warning:7:27
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@ -71,9 +71,9 @@ function declparse(
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Q &$c,
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Q $d = null,
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Q &$e = null,
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$f,
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$f = null,
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$g = null,
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&$h,
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&$h = null,
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&$i = null) {
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$a++;
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$b++;
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