Initial commit: Tree-sitter grammar for Compare Output language

grammar.js

@@ -0,0 +1,59 @@
+module.exports = grammar({
+    name: "compare_output",
+
+    rules: {
+        source_file: ($) => repeat($._item),
+
+        _item: ($) =>
+            choice($.table_row, $.header_row, $.separator_row, $._whitespace),
+
+        // Header row with column names
+        header_row: ($) => seq("|", repeat1($.header_cell), "|"),
+
+        // Data row with values
+        table_row: ($) => seq("|", repeat1($.data_cell), "|"),
+
+        // Separator row (optional, sometimes used)
+        separator_row: ($) => seq("|", repeat1(seq(/[-=]+/, "|"))),
+
+        // Header cell (column name)
+        header_cell: ($) => seq(/\s*/, $.column_name, /\s*/, "|"),
+
+        // Data cell (value)
+        data_cell: ($) =>
+            seq(
+                /\s*/,
+                optional(
+                    choice(
+                        $.binary_value,
+                        $.decimal_value,
+                        $.register_reference,
+                    ),
+                ),
+                /\s*/,
+                "|",
+            ),
+
+        // Column names in headers
+        column_name: ($) => choice($.register_name, $.pin_name, $.generic_name),
+
+        // Register references like RAM[0], RAM[256]
+        register_name: ($) => /RAM\[\d+\]/,
+
+        // Pin names like 'a', 'b', 'out', 'in'
+        pin_name: ($) => /[a-zA-Z][a-zA-Z0-9_]*/,
+
+        // Generic column names
+        generic_name: ($) => /[a-zA-Z][a-zA-Z0-9_\[\]]*/,
+
+        // Values in data cells
+        binary_value: ($) => /[01]+/,
+        decimal_value: ($) => /\d+/,
+        register_reference: ($) => /[A-Z][a-zA-Z0-9_\[\]]*/,
+
+        // Whitespace
+        _whitespace: ($) => /\s+/,
+    },
+
+    extras: ($) => [/[ \t]/],
+});