Add support for finding PHP constants (#37)

This PR updates the crate so it can locate PHP constants defined either with const or with define().

Author: sirbrillig

src/query_regex.rs

@@ -6,7 +6,9 @@ pub fn get_regex_for_query(query: &str, file_type: &FileType) -> Regex {
         FileType::JS => &format!(
             r"(?:\b(?:function|var|let|const|class|interface|type)\s+{query}\b|\b{query}\([^)]*\)\s*(?::[^\{{]+)?\{{|\b{query}:|@typedef\s*(?:\{{[^\}}]+\}})?\s*{query}\b)"
         ),
-        FileType::PHP => &format!(r"\b(?:function|class|trait|interface|enum) {query}\b"),
+        FileType::PHP => &format!(
+            r#"\b(?:function|class|trait|interface|enum|const) {query}\b|define\s*\(\s*['"]{query}"#
+        ),
         FileType::RS => &format!(r"\b(?:fn|trait|enum|struct|mod) {query}\b"),
     };
     Regex::new(regexp_string).expect("Could not create regex for file type query")

tests/fixtures/by-language/php-fixture.php

@@ -26,3 +26,17 @@ public function doSomething(): Foo {
 	public function doSomethingAbsolute(): \Home\Foo {
 	}
 }
+
+const GLOBALCONSTANT = 77;
+define( 'GLOBALDEFINESINGLE', 42 );
+define( "GLOBALDEFINEDOUBLE", 43 );
+
+class ClassWithConstant {
+	public const MYCONSTANT = 5;
+
+	public function echoConstant(): void {
+		echo self::MYCONSTANT;
+		echo GLOBALCONSTANT;
+		echo GLOBALDEFINE;
+	}
+}

tests/integration_test.rs

@@ -287,6 +287,10 @@ fn search_returns_matching_js_function_line_with_filetype_alias(#[case] file_typ
 #[case(String::from("MyEnum"), String::from("php"), 20)]
 #[case(String::from("doSomething"), String::from("php"), 24)]
 #[case(String::from("doSomethingAbsolute"), String::from("php"), 26)]
+#[case::php_global_constant(String::from("GLOBALCONSTANT"), String::from("php"), 30)]
+#[case::php_global_define_single(String::from("GLOBALDEFINESINGLE"), String::from("php"), 31)]
+#[case::php_global_define_double(String::from("GLOBALDEFINEDOUBLE"), String::from("php"), 32)]
+#[case::php_global_class_constant(String::from("MYCONSTANT"), String::from("php"), 35)]
 #[case(String::from("query_db"), String::from("rs"), 1)]
 #[case(String::from("public_func"), String::from("rs"), 6)]
 #[case(String::from("Wrapper"), String::from("rs"), 4)]