Update grammar; Fix built-in function type checks

src/abstract_tree/function_call.rs

@@ -111,7 +111,21 @@ impl AbstractTree for FunctionCall {
                     value_node.expected_type(context)
                 }
             }
-            Expression::Identifier(identifier) => identifier.expected_type(context),
+            Expression::Identifier(identifier) => {
+                for built_in_function in BUILT_IN_FUNCTIONS {
+                    if identifier.inner() == built_in_function.name() {
+                        if let Type::Function {
+                            parameter_types: _,
+                            return_type,
+                        } = built_in_function.r#type()
+                        {
+                            return Ok(*return_type);
+                        }
+                    }
+                }
+
+                identifier.expected_type(context)
+            }
             Expression::Index(index) => index.expected_type(context),
             Expression::Math(math) => math.expected_type(context),
             Expression::Logic(logic) => logic.expected_type(context),

tree-sitter-dust/corpus/functions.txt

@@ -163,3 +163,27 @@ x = (fn cb <() -> bool>) <bool> {
                   (expression
                     (value
                       (boolean))))))))))))
+
+================================================================================
+Nested Function Call
+================================================================================
+
+(from_json (read 'file.json'))
+
+--------------------------------------------------------------------------------
+
+(root
+  (statement
+    (expression
+      (function_call
+        (expression
+          (identifier
+            (built_in_function)))
+        (expression
+          (function_call
+            (expression
+              (identifier
+                (built_in_function)))
+            (expression
+              (value
+                (string)))))))))

tree-sitter-dust/grammar.js

@@ -60,12 +60,14 @@ module.exports = grammar({
         ),
       ),
 
-    identifier: $ => choice(
+    identifier: $ =>
+      choice(
         $._identifier_pattern,
         $.built_in_function,
       ),
 
-    _identifier_pattern: $ => /[_a-zA-Z]+[_a-zA-Z0-9]?/,
+    _identifier_pattern: $ =>
+      /[_a-zA-Z]+[_a-zA-Z0-9]?/,
 
     value: $ =>
       choice(
@@ -288,10 +290,7 @@ module.exports = grammar({
           '{',
           repeat1(
             seq(
-              choice(
-                $.expression,
-                '*',
-              ),
+              choice($.expression, '*'),
               '=>',
               $.statement,
               optional(','),
@@ -390,19 +389,23 @@ module.exports = grammar({
 
     built_in_function: $ =>
       choice(
-        "assert",
-        "assert_equal",
-        "bash",
-        "download",
-        "fish",
-        "length",
-        "metadata",
-        "output",
-        "output_error",
-        "random",
-        "random_boolean",
-        "random_float",
-        "random_integer",
+        'assert',
+        'assert_equal',
+        'bash',
+        'download',
+        'fish',
+        'from_json',
+        'length',
+        'metadata',
+        'output',
+        'output_error',
+        'random',
+        'random_boolean',
+        'random_float',
+        'random_integer',
+        'read',
+        'to_json',
+        'write',
       ),
   },
 });

tree-sitter-dust/src/grammar.json

@@ -1294,6 +1294,10 @@
           "type": "STRING",
           "value": "fish"
         },
+        {
+          "type": "STRING",
+          "value": "from_json"
+        },
         {
           "type": "STRING",
           "value": "length"
@@ -1325,6 +1329,18 @@
         {
           "type": "STRING",
           "value": "random_integer"
+        },
+        {
+          "type": "STRING",
+          "value": "read"
+        },
+        {
+          "type": "STRING",
+          "value": "to_json"
+        },
+        {
+          "type": "STRING",
+          "value": "write"
         }
       ]
     }

tree-sitter-dust/src/node-types.json

@@ -716,11 +716,11 @@
   },
   {
     "type": "float",
-    "named": false
+    "named": true
   },
   {
     "type": "float",
-    "named": true
+    "named": false
   },
   {
     "type": "fn",
@@ -730,6 +730,10 @@
     "type": "for",
     "named": false
   },
+  {
+    "type": "from_json",
+    "named": false
+  },
   {
     "type": "if",
     "named": false
@@ -790,6 +794,10 @@
     "type": "random_integer",
     "named": false
   },
+  {
+    "type": "read",
+    "named": false
+  },
   {
     "type": "return",
     "named": false
@@ -802,6 +810,10 @@
     "type": "string",
     "named": true
   },
+  {
+    "type": "to_json",
+    "named": false
+  },
   {
     "type": "true",
     "named": false
@@ -810,6 +822,10 @@
     "type": "while",
     "named": false
   },
+  {
+    "type": "write",
+    "named": false
+  },
   {
     "type": "{",
     "named": false