Add Tree-sitter grammar for Decodal

2026-06-16 12:01:29 +09:00
parent f1a5836247
commit 58d2c9b423
39 changed files with 8453 additions and 1 deletions
@@ -0,0 +1,76 @@
+==================
+Top-level fields
+==================
+host = String;
+port = Int & > 443 default 8080;
+---
+
+(source_file
+  (field_definition
+    path: (field_path (identifier))
+    value: (identifier))
+  (field_definition
+    path: (field_path (identifier))
+    value: (default_expression
+      base: (binary_expression
+        left: (identifier)
+        right: (comparison_constraint
+          value: (integer)))
+      fallback: (literal (integer)))))
+
+==================
+Import and function
+==================
+let
+  schema = import "./schema.dcdl";
+  mk = (cfg: schema.Service) => cfg;
+in
+  mk({ name = "api"; })
+---
+
+(source_file
+  (let_expression
+    (field_definition
+      path: (field_path (identifier))
+      value: (import_expression
+        specifier: (string)))
+    (field_definition
+      path: (field_path (identifier))
+      value: (function_expression
+        (parameter
+          name: (identifier)
+          constraint: (path_expression
+            object: (identifier)
+            field: (identifier)))
+        body: (identifier)))
+    body: (call_expression
+      function: (identifier)
+      (object
+        (field_definition
+          path: (field_path (identifier))
+          value: (literal (string)))))))
+
+==================
+Match and patch
+==================
+base // {
+  summary = match env {
+    "prod": "production";
+    _: "other";
+  };
+}
+---
+
+(source_file
+  (binary_expression
+    left: (identifier)
+    right: (object
+      (field_definition
+        path: (field_path (identifier))
+        value: (match_expression
+          scrutinee: (identifier)
+          (match_arm
+            pattern: (literal (string))
+            body: (literal (string)))
+          (match_arm
+            body: (literal (string))))))))