feat(microsyntax): introduce structured microsyntax grammar for structural directives

.editorconfig

@@ -34,6 +34,10 @@ indent_size = 4
 indent_style = tab
 indent_size = 8
 
+[*.txt]
+indent_style = space
+indent_size = 2
+
 [Makefile]
 indent_style = tab
 indent_size = 8

grammar.js

@@ -20,6 +20,10 @@ module.exports = grammar(HTML, {
 
   conflicts: ($) => [
     [$.arrow_function_parameters, $._primitive],
+    [$._any_expression, $.arguments],
+    [$.expression, $.arguments],
+    [$.microsyntax_property_binding, $._primitive],
+
   ],
 
   externals: ($, original) =>
@@ -42,7 +46,13 @@ module.exports = grammar(HTML, {
 
     // ---------- Overrides ----------
     attribute_name: (_) => /[^<>\*.\[\]\(\)"'=\s]+/,
-    text: (_) => /[^<>@{}&\s]([^<>@{}&]*[^<>@{}&\s])?/,
+    text: (_) => choice(
+      // 1. The original greedy block (matches standard text until it hits a boundary)
+      /[^<>@{}&\s]([^<>@{}&]*[^<>@{}&\s])?/,
+
+      // 2. The Fallback (Catches naked ampersands that fail the entity rule)
+      /&/
+    ),
 
     // ----------- Statement block --------
     statement_block: ($) => prec.right(seq('{', repeat($._node), '}')),
@@ -396,56 +406,74 @@ module.exports = grammar(HTML, {
         optional(
           seq(
             '=',
-            choice($._double_quote, $._single_quote),
-            choice($.structural_expression, $.structural_declaration),
-            choice($._double_quote, $._single_quote),
+            choice(
+              seq($._double_quote, $.microsyntax, $._double_quote),
+              seq($._single_quote, $.microsyntax, $._single_quote),
+            ),
           ),
         ),
       ),
 
-    structural_expression: ($) =>
-      seq(
-        $._any_expression,
-        optional($._alias),
-        optional($._else_template_expression),
-        optional($._context_expression),
+    microsyntax: ($) =>
+      prec.left(
+        seq(
+          choice($.microsyntax_anonymous_binding, $.microsyntax_binding),
+          repeat(seq(optional(choice(';', ',')), $.microsyntax_binding)),
+          optional(choice(';', ',')),
+        ),
       ),
 
-    structural_declaration: ($) =>
-      seq(
-        alias('let', $.special_keyword),
+      microsyntax_anonymous_binding: ($) =>
+        choice(
+          prec(3, seq(
+            field('value', $.identifier),
+            optional($._alias)
+          )),
+          prec(2, seq(
+            field('value', $._any_expression),
+            optional($._alias)
+          )),
+        ),
+
+      microsyntax_binding: ($) =>
+        choice(
+          // evaluate explicit rules first
+          prec(2, $.microsyntax_variable_declaration),
+          prec(2, $.microsyntax_keyword_binding),
+          prec(1, $.microsyntax_property_binding),
+        ),
+
+      microsyntax_property_binding: ($) =>
+        choice(
+          seq(
+            field('name', $.identifier),
+            optional(':'),
+            field('value', $._any_expression),
+            optional($._alias)
+          ),
+        ),
+
+      microsyntax_keyword_binding: ($) =>
         seq(
-          $.structural_assignment,
-          repeat(seq(choice(';', ','), $.structural_assignment)),
+          field('name', choice(
+            alias('else', $.special_keyword),
+            alias('then', $.special_keyword),
+            alias('of', $.special_keyword),
+          )),
+          optional(':'),
+          field('value', $._any_expression),
+          optional($._alias)
         ),
-      ),
 
-    structural_assignment: ($) =>
-      choice(
-        seq(field('name', $.identifier), ':', field('value', $.identifier)),
-        prec.left(
-          PREC.ALIAS,
+      microsyntax_variable_declaration: ($) =>
           seq(
-            optional(alias('let', $.special_keyword)),
+            alias('let', $.special_keyword),
             field('name', $.identifier),
-            field('operator', choice($.identifier, '=')),
-            field('value', $.expression),
+            optional(seq(field('operator', '='), field('value', $.expression))),
             optional($._alias),
-          ),
         ),
-        seq(field('name', $.identifier), optional($._alias)),
-      ),
 
     _alias: ($) => seq(alias('as', $.special_keyword), field('alias', $.identifier)),
-    _else_template_expression: ($) =>
-      seq(';', alias('else', $.special_keyword), $.identifier),
-    _context_expression: ($) =>
-      seq(
-        ';',
-        choice(alias('context', $.special_keyword), field('named', $.identifier)),
-        ':',
-        $._any_expression,
-      ),
 
     // ---------- Bindings ----------
     property_binding: ($) =>

queries/highlights.scm

@@ -47,9 +47,6 @@
    "\"\""
   ] @punctuation.delimiter)
 
-(structural_assignment
-  operator: (identifier) @keyword)
-
 (member_expression
   property: (identifier) @property)