arrays as value_expressions

corpus/select_statement/value_expression.txt

@@ -56,6 +56,38 @@ SELECT foo, foo.bar;
     (select_item
       (identifier))))
 
+================================================================================
+arrays
+================================================================================
+SELECT
+    ARRAY[],
+    array[1, 2],
+    array[array[1, 2], array[3, 4]],
+    array[]::integer[];
+--------------------------------------------------------------------------------
+
+(source_file
+  (select_statement
+    (select_item
+      (array_constructor))
+    (select_item
+      (array_constructor
+        (number)
+        (number)))
+    (select_item
+      (array_constructor
+        (array_constructor
+          (number)
+          (number))
+        (array_constructor
+          (number)
+          (number))))
+    (select_item
+      (op_expression
+        (array_constructor)
+        (cast)
+        (identifier)))))
+
 ================================================================================
 binary_expression
 ================================================================================

grammar.js

@@ -742,6 +742,7 @@ module.exports = grammar({
       seq("(", $.select_statement, ")"),
       seq("(", commaSep1($._value_expression), ")"),
       $.function_call,
+      $.array_constructor,
       $.op_expression,
       $.time_expression,
       // TODO(chrde): this one feels a bit hacky? perhaps move to identifier regexp
@@ -749,6 +750,8 @@ module.exports = grammar({
       $.identifier,
     ),
 
+    array_constructor: $ => seq(kw("array"), "[", commaSep($._value_expression), "]"),
+
     // TODO(chrde): it does not handle nested dollar quotes... perhaps move to an external scanner?
     dollar_quote_string: $ => seq(
       "$", $._identifier, "$",
@@ -790,7 +793,7 @@ module.exports = grammar({
     ),
 
     op_expression: $ => choice(
-      prec.left(12, seq($._value_expression, $.cast, $.identifier)),
+      prec.left(12, seq($._value_expression, $.cast, $._type)),
       // array access
       prec.right(10, seq(choice($.minus, $.plus), $._value_expression)),
       // ^