Enable frozen_string_literal in all files in arel

41 files changed, 41 insertions, 0 deletions

diff --git a/lib/arel/nodes/and.rb b/lib/arel/nodes/and.rb
index 8e1afda709..1e2f61cf43 100644
--- a/lib/arel/nodes/and.rb
+++ b/lib/arel/nodes/and.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class And < Arel::Nodes::Node
diff --git a/lib/arel/nodes/ascending.rb b/lib/arel/nodes/ascending.rb
index bca00a8339..adadab55e4 100644
--- a/lib/arel/nodes/ascending.rb
+++ b/lib/arel/nodes/ascending.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Ascending < Ordering
diff --git a/lib/arel/nodes/binary.rb b/lib/arel/nodes/binary.rb
index 763091c267..3001788774 100644
--- a/lib/arel/nodes/binary.rb
+++ b/lib/arel/nodes/binary.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Binary < Arel::Nodes::Node
diff --git a/lib/arel/nodes/bind_param.rb b/lib/arel/nodes/bind_param.rb
index 3a4aedc4ba..9e297831cd 100644
--- a/lib/arel/nodes/bind_param.rb
+++ b/lib/arel/nodes/bind_param.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class BindParam < Node
diff --git a/lib/arel/nodes/case.rb b/lib/arel/nodes/case.rb
index 85f8851dbe..1edca40001 100644
--- a/lib/arel/nodes/case.rb
+++ b/lib/arel/nodes/case.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Case < Arel::Nodes::Node
diff --git a/lib/arel/nodes/casted.rb b/lib/arel/nodes/casted.rb
index 6b15f9e4b3..290e4dd38c 100644
--- a/lib/arel/nodes/casted.rb
+++ b/lib/arel/nodes/casted.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Casted < Arel::Nodes::Node # :nodoc:
diff --git a/lib/arel/nodes/count.rb b/lib/arel/nodes/count.rb
index 5c8ade1cf9..a7c6236a22 100644
--- a/lib/arel/nodes/count.rb
+++ b/lib/arel/nodes/count.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Count < Arel::Nodes::Function
diff --git a/lib/arel/nodes/delete_statement.rb b/lib/arel/nodes/delete_statement.rb
index 8aaf8ca0b6..593ce9bddf 100644
--- a/lib/arel/nodes/delete_statement.rb
+++ b/lib/arel/nodes/delete_statement.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class DeleteStatement < Arel::Nodes::Binary
diff --git a/lib/arel/nodes/descending.rb b/lib/arel/nodes/descending.rb
index d886bdcb5f..d7261ab583 100644
--- a/lib/arel/nodes/descending.rb
+++ b/lib/arel/nodes/descending.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Descending < Ordering
diff --git a/lib/arel/nodes/equality.rb b/lib/arel/nodes/equality.rb
index f29344e580..ef44725e24 100644
--- a/lib/arel/nodes/equality.rb
+++ b/lib/arel/nodes/equality.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Equality < Arel::Nodes::Binary
diff --git a/lib/arel/nodes/extract.rb b/lib/arel/nodes/extract.rb
index 7ed678ca08..4e797b6770 100644
--- a/lib/arel/nodes/extract.rb
+++ b/lib/arel/nodes/extract.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Extract < Arel::Nodes::Unary
diff --git a/lib/arel/nodes/false.rb b/lib/arel/nodes/false.rb
index 6df70e43ce..26b4e5db97 100644
--- a/lib/arel/nodes/false.rb
+++ b/lib/arel/nodes/false.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class False < Arel::Nodes::Node
diff --git a/lib/arel/nodes/full_outer_join.rb b/lib/arel/nodes/full_outer_join.rb
index 708f161c9a..12a02d8cd9 100644
--- a/lib/arel/nodes/full_outer_join.rb
+++ b/lib/arel/nodes/full_outer_join.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class FullOuterJoin < Arel::Nodes::Join
diff --git a/lib/arel/nodes/function.rb b/lib/arel/nodes/function.rb
index 182dfa7329..28a394e9f3 100644
--- a/lib/arel/nodes/function.rb
+++ b/lib/arel/nodes/function.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Function < Arel::Nodes::Node
diff --git a/lib/arel/nodes/grouping.rb b/lib/arel/nodes/grouping.rb
index e7f4bd9cd5..16911eb3b6 100644
--- a/lib/arel/nodes/grouping.rb
+++ b/lib/arel/nodes/grouping.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Grouping < Unary
diff --git a/lib/arel/nodes/in.rb b/lib/arel/nodes/in.rb
index 6ccf37a053..30cd771c40 100644
--- a/lib/arel/nodes/in.rb
+++ b/lib/arel/nodes/in.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class In < Equality
diff --git a/lib/arel/nodes/infix_operation.rb b/lib/arel/nodes/infix_operation.rb
index 55ac715f73..4eb7c5356f 100644
--- a/lib/arel/nodes/infix_operation.rb
+++ b/lib/arel/nodes/infix_operation.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
 
diff --git a/lib/arel/nodes/inner_join.rb b/lib/arel/nodes/inner_join.rb
index bf10eeac18..4e398267c3 100644
--- a/lib/arel/nodes/inner_join.rb
+++ b/lib/arel/nodes/inner_join.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class InnerJoin < Arel::Nodes::Join
diff --git a/lib/arel/nodes/insert_statement.rb b/lib/arel/nodes/insert_statement.rb
index ada4fcc562..72793bc1ad 100644
--- a/lib/arel/nodes/insert_statement.rb
+++ b/lib/arel/nodes/insert_statement.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class InsertStatement < Arel::Nodes::Node
diff --git a/lib/arel/nodes/join_source.rb b/lib/arel/nodes/join_source.rb
index da828cf9ee..428ce8183e 100644
--- a/lib/arel/nodes/join_source.rb
+++ b/lib/arel/nodes/join_source.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     ###
diff --git a/lib/arel/nodes/matches.rb b/lib/arel/nodes/matches.rb
index 0d9c1925dc..3ad3850a8e 100644
--- a/lib/arel/nodes/matches.rb
+++ b/lib/arel/nodes/matches.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Matches < Binary
diff --git a/lib/arel/nodes/named_function.rb b/lib/arel/nodes/named_function.rb
index c792f0af98..173838a7fd 100644
--- a/lib/arel/nodes/named_function.rb
+++ b/lib/arel/nodes/named_function.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class NamedFunction < Arel::Nodes::Function
diff --git a/lib/arel/nodes/node.rb b/lib/arel/nodes/node.rb
index 239c4fd766..34e71063af 100644
--- a/lib/arel/nodes/node.rb
+++ b/lib/arel/nodes/node.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require 'arel/collectors/sql_string'
 
 module Arel
diff --git a/lib/arel/nodes/outer_join.rb b/lib/arel/nodes/outer_join.rb
index bea5578b95..c568655fe6 100644
--- a/lib/arel/nodes/outer_join.rb
+++ b/lib/arel/nodes/outer_join.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class OuterJoin < Arel::Nodes::Join
diff --git a/lib/arel/nodes/over.rb b/lib/arel/nodes/over.rb
index 21d1b5029e..47a34e69ea 100644
--- a/lib/arel/nodes/over.rb
+++ b/lib/arel/nodes/over.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
 
diff --git a/lib/arel/nodes/regexp.rb b/lib/arel/nodes/regexp.rb
index 784368f5bf..8a76185ef0 100644
--- a/lib/arel/nodes/regexp.rb
+++ b/lib/arel/nodes/regexp.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Regexp < Binary
diff --git a/lib/arel/nodes/right_outer_join.rb b/lib/arel/nodes/right_outer_join.rb
index ea1ddb7d52..04ab31ebf0 100644
--- a/lib/arel/nodes/right_outer_join.rb
+++ b/lib/arel/nodes/right_outer_join.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class RightOuterJoin < Arel::Nodes::Join
diff --git a/lib/arel/nodes/select_core.rb b/lib/arel/nodes/select_core.rb
index 3696dd20af..264fa46591 100644
--- a/lib/arel/nodes/select_core.rb
+++ b/lib/arel/nodes/select_core.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class SelectCore < Arel::Nodes::Node
diff --git a/lib/arel/nodes/select_statement.rb b/lib/arel/nodes/select_statement.rb
index 830ac27046..641a08405d 100644
--- a/lib/arel/nodes/select_statement.rb
+++ b/lib/arel/nodes/select_statement.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class SelectStatement < Arel::Nodes::Node
diff --git a/lib/arel/nodes/sql_literal.rb b/lib/arel/nodes/sql_literal.rb
index 2c56644b99..73575a7d49 100644
--- a/lib/arel/nodes/sql_literal.rb
+++ b/lib/arel/nodes/sql_literal.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class SqlLiteral < String
diff --git a/lib/arel/nodes/string_join.rb b/lib/arel/nodes/string_join.rb
index 7fb0033c0f..21d6845c45 100644
--- a/lib/arel/nodes/string_join.rb
+++ b/lib/arel/nodes/string_join.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class StringJoin < Arel::Nodes::Join
diff --git a/lib/arel/nodes/table_alias.rb b/lib/arel/nodes/table_alias.rb
index a5adc0766a..78deb175b6 100644
--- a/lib/arel/nodes/table_alias.rb
+++ b/lib/arel/nodes/table_alias.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class TableAlias < Arel::Nodes::Binary
diff --git a/lib/arel/nodes/terminal.rb b/lib/arel/nodes/terminal.rb
index f4cdfdfe17..6f60fe006f 100644
--- a/lib/arel/nodes/terminal.rb
+++ b/lib/arel/nodes/terminal.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Distinct < Arel::Nodes::Node
diff --git a/lib/arel/nodes/true.rb b/lib/arel/nodes/true.rb
index 082963e5e6..796b5b9348 100644
--- a/lib/arel/nodes/true.rb
+++ b/lib/arel/nodes/true.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class True < Arel::Nodes::Node
diff --git a/lib/arel/nodes/unary.rb b/lib/arel/nodes/unary.rb
index 50946980b4..a42744b1d5 100644
--- a/lib/arel/nodes/unary.rb
+++ b/lib/arel/nodes/unary.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Unary < Arel::Nodes::Node
diff --git a/lib/arel/nodes/unary_operation.rb b/lib/arel/nodes/unary_operation.rb
index 1636c01279..3c56ef2026 100644
--- a/lib/arel/nodes/unary_operation.rb
+++ b/lib/arel/nodes/unary_operation.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
 
diff --git a/lib/arel/nodes/unqualified_column.rb b/lib/arel/nodes/unqualified_column.rb
index 2820dba9d2..f9017238c8 100644
--- a/lib/arel/nodes/unqualified_column.rb
+++ b/lib/arel/nodes/unqualified_column.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class UnqualifiedColumn < Arel::Nodes::Unary
diff --git a/lib/arel/nodes/update_statement.rb b/lib/arel/nodes/update_statement.rb
index d6831dc242..286f0bd3ce 100644
--- a/lib/arel/nodes/update_statement.rb
+++ b/lib/arel/nodes/update_statement.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class UpdateStatement < Arel::Nodes::Node
diff --git a/lib/arel/nodes/values.rb b/lib/arel/nodes/values.rb
index 814e843dab..b32d5063a2 100644
--- a/lib/arel/nodes/values.rb
+++ b/lib/arel/nodes/values.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Values < Arel::Nodes::Binary
diff --git a/lib/arel/nodes/window.rb b/lib/arel/nodes/window.rb
index fee8eeff7a..535c0c6238 100644
--- a/lib/arel/nodes/window.rb
+++ b/lib/arel/nodes/window.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class Window < Arel::Nodes::Node
diff --git a/lib/arel/nodes/with.rb b/lib/arel/nodes/with.rb
index 7f08abe47d..def7840ea3 100644
--- a/lib/arel/nodes/with.rb
+++ b/lib/arel/nodes/with.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 module Arel
   module Nodes
     class With < Arel::Nodes::Unary