Add tags.scm

Author: hkmatsumoto

queries/tags.scm

@@ -0,0 +1,60 @@
+; ADT definitions
+
+(struct_item
+    name: (type_identifier) @name) @definition.class
+
+(enum_item
+    name: (type_identifier) @name) @definition.class
+
+(union_item
+    name: (type_identifier) @name) @definition.class
+
+; type aliases
+
+(type_item
+    name: (type_identifier) @name) @definition.class
+
+; method definitions
+
+(declaration_list
+    (function_item
+        name: (identifier) @name)) @definition.method
+
+; function definitions
+
+(function_item
+    name: (identifier) @name) @definition.function
+
+; trait definitions
+(trait_item
+    name: (type_identifier) @name) @definition.interface
+
+; module definitions
+(mod_item
+    name: (identifier) @name) @definition.module
+
+; macro definitions
+
+(macro_definition
+    name: (identifier) @name) @definition.macro
+
+; references
+
+(call_expression
+    function: (identifier) @name) @reference.call
+
+(call_expression
+    function: (field_expression
+        field: (field_identifier) @name)) @reference.call
+
+(macro_invocation
+    macro: (identifier) @name) @reference.call
+
+; implementations
+
+(impl_item
+    trait: (type_identifier) @name) @reference.implementation
+
+(impl_item
+    type: (type_identifier) @name
+    !trait) @reference.implementation