Add notation for containers list array/list/set/vector as '[' <values…

… separated by commas with optional trailing comma> ']'

tree-sitter-tako/grammar.js

@@ -142,19 +142,24 @@ module.exports = grammar({
     // TODO: add the actual grammar rules
     source_file: ($) => seq(optional($.shebang), separated_one(optional($._expression), $.heading)),
     _expression: ($) => choice(
-      $._operator_expression, // Consider keeping this name to support editing?
-      $.call,
-      $.parens,
-      $.block,
+      $._expression_not_literal,
       $.string_literal,
       $._number,
       $.hex_literal,
       $.color,
+    ),
+    _expression_not_literal: ($) => choice(
+      $._operator_expression, // Consider keeping this name to support editing?
+      $.parens,
+      $.container,
+      $.call,
+      $.block,
       $.ident,
     ),
     block: ($) => seq('{', optional($._expression), '}'),
     parens: ($) => seq('(', $._expression ,')'),
-    call: ($) => left(PREC.call, seq($._expression, '(', separated($._expression, ','), optional(','), ')')),
+    container: ($) => seq('[', separated($._expression, ','), optional(',') ,']'),
+    call: ($) => left(PREC.call, seq($._expression_not_literal, '(', separated($._expression, ','), optional(','), ')')),
     _operator_expression: ($) => {
       return choice(...ALL_OPERATORS.map(([name, _operator_parser]) => {
         try {

tree-sitter-tako/test/corpus/simple_exprs.tk

@@ -25,6 +25,146 @@ Simple values with infix sequence
   )
 )
 
+==================
+Simple values with parens
+==================
+
+(0)
+
+---
+(source_file
+  (parens
+    (int_literal)
+  )
+)
+
+==================
+Simple values with more parens
+==================
+
+((0))
+
+---
+(source_file
+  (parens
+    (parens
+      (int_literal)
+    )
+  )
+)
+
+==================
+Simple values with mismatched parens
+==================
+
+((0()
+
+---
+(source_file
+  (parens
+    (parens
+      (int_literal)
+      (ERROR))
+    (MISSING ")")
+  )
+)
+
+==================
+Empty Block
+==================
+
+{}
+
+---
+(source_file
+  (block)
+)
+
+==================
+Empty Block with suffix sequence
+==================
+
+{};
+
+---
+(source_file
+  (sequence (block))
+)
+
+==================
+Empty Container notation
+==================
+
+[]
+
+---
+(source_file
+  (container)
+)
+
+
+==================
+Container notation with a single value
+==================
+
+[1]
+
+---
+(source_file
+  (container
+    (int_literal)
+  )
+)
+
+==================
+Container notation with multiple values
+==================
+
+[1,2,3,4,]
+
+---
+(source_file
+  (container
+    (int_literal)
+    (int_literal)
+    (int_literal)
+    (int_literal)
+  )
+)
+
+==================
+Container notation containing multiple identifiers
+==================
+
+[a,b,c,d,]
+
+---
+(source_file
+  (container
+    (ident)
+    (ident)
+    (ident)
+    (ident)
+  )
+)
+
+
+==================
+Container notation containing multiple subexpressions
+==================
+
+[3+a,b*c,c=0,"Wow",]
+
+---
+(source_file
+  (container
+    (add (int_literal) (ident))
+    (mul (ident) (ident))
+    (assign (ident) (int_literal))
+    (string_literal)
+  )
+)
+
 ==================
 Simple Expressions
 ==================