Add select binding

grammar.js

@@ -164,9 +164,16 @@ module.exports = grammar({
       $._string_literal,
       $.boolean_literal,
       alias("any", $.any),
+      $.pattern_binding,
       alias("default", $.default),
     ),
 
+    pattern_binding: ($) => seq(
+      field("value", alias("any", $.any)),
+      field("operator", alias("@", $.operator)),
+      field("binding", $.identifier),
+    ),
+
     _case_value: ($) => choice(
       alias("unset", $.unset),
       $._expr,

src/grammar.json

@@ -744,6 +744,10 @@
           "named": true,
           "value": "any"
         },
+        {
+          "type": "SYMBOL",
+          "name": "pattern_binding"
+        },
         {
           "type": "ALIAS",
           "content": {
@@ -755,6 +759,45 @@
         }
       ]
     },
+    "pattern_binding": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "FIELD",
+          "name": "value",
+          "content": {
+            "type": "ALIAS",
+            "content": {
+              "type": "STRING",
+              "value": "any"
+            },
+            "named": true,
+            "value": "any"
+          }
+        },
+        {
+          "type": "FIELD",
+          "name": "operator",
+          "content": {
+            "type": "ALIAS",
+            "content": {
+              "type": "STRING",
+              "value": "@"
+            },
+            "named": true,
+            "value": "operator"
+          }
+        },
+        {
+          "type": "FIELD",
+          "name": "binding",
+          "content": {
+            "type": "SYMBOL",
+            "name": "identifier"
+          }
+        }
+      ]
+    },
     "_case_value": {
       "type": "CHOICE",
       "members": [

src/node-types.json

@@ -321,6 +321,42 @@
       }
     }
   },
+  {
+    "type": "pattern_binding",
+    "named": true,
+    "fields": {
+      "binding": {
+        "multiple": false,
+        "required": true,
+        "types": [
+          {
+            "type": "identifier",
+            "named": true
+          }
+        ]
+      },
+      "operator": {
+        "multiple": false,
+        "required": true,
+        "types": [
+          {
+            "type": "operator",
+            "named": true
+          }
+        ]
+      },
+      "value": {
+        "multiple": false,
+        "required": true,
+        "types": [
+          {
+            "type": "any",
+            "named": true
+          }
+        ]
+      }
+    }
+  },
   {
     "type": "property",
     "named": true,
@@ -499,6 +535,10 @@
           "type": "interpreted_string_literal",
           "named": true
         },
+        {
+          "type": "pattern_binding",
+          "named": true
+        },
         {
           "type": "raw_string_literal",
           "named": true

test/corpus/select.txt

@@ -40,6 +40,7 @@ Select (soong config variable)
 foo = select(soong_config_variable("my_namespace", "my_var"), {
     "foo": unset,
     "default": "bar",
+    any @ foo: unset,
 })
 
 --------------------------------------------------------------------------------
@@ -62,7 +63,14 @@ foo = select(soong_config_variable("my_namespace", "my_var"), {
         (select_case
           (select_pattern
             (interpreted_string_literal))
-          (interpreted_string_literal))))))
+          (interpreted_string_literal))
+        (select_case
+          (select_pattern
+            (pattern_binding
+              (any)
+              (operator)
+              (identifier)))
+          (unset))))))
 
 ================================================================================
 Select (no default)

test/highlight/select.bp

@@ -1,6 +1,9 @@
 foo = select(soong_config_variable("my_namespace", "my_var"), {
     // ^ keyword.conditional
     "foo": unset,
+    any @ foo: unset,
+    //  ^ operator
+    //    ^ variable
     default: "bar",
 })