DiscouragedConstants: implement Sniff::is_token_namespaced()

Author: jrfnl

WordPress/Sniffs/WP/DiscouragedConstantsSniff.php

@@ -124,10 +124,7 @@ public function process_arbitrary_tstring( $stackPtr ) {
 			return;
 		}
 
-		if ( false !== $prev
-			&& \T_NS_SEPARATOR === $this->tokens[ $prev ]['code']
-			&& \T_STRING === $this->tokens[ ( $prev - 1 ) ]['code']
-		) {
+		if ( $this->is_token_namespaced( $stackPtr ) === true ) {
 			// Namespaced constant of the same name.
 			return;
 		}

WordPress/Tests/WP/DiscouragedConstantsUnitTest.inc

@@ -42,7 +42,7 @@ define( 'My\STYLESHEETPATH', 'something' );
 if ( defined( 'STYLESHEETPATH' ) ) { // Ok.
 	// Do something unrelated.
 }
-
+echo namespace\STYLESHEETPATH; // "Magic" namespace operator.
 
 /*
  * These are all bad.