Add the new_hash_syntax syntax option

README.md

@@ -41,6 +41,7 @@ Default options:
 :raw              => false,  # Do not recursively format object instance variables.
 :sort_keys        => false,  # Do not sort hash keys.
 :limit            => false,  # Limit large output for arrays and hashes. Set to a boolean or integer.
+:new_hash_syntax  => false,  # Use the foo: 'bar' syntax, when the key is a symbol
 :color => {
   :args       => :pale,
   :array      => :white,

lib/awesome_print/formatters/hash.rb

@@ -43,7 +43,11 @@ module AwesomePrint
 
           @data = @data.map do |key, value|
             formatter.indented do
-              formatter.align(key, width) << formatter.colorize(" => ", :hash) << inspector.awesome(value)
+              if options[:new_hash_syntax] && is_a_symbol?(key)
+                new_hash_syntax_format(key, value)
+              else
+                old_hash_syntax_format(key, value)
+              end
             end
           end
 
@@ -65,6 +69,19 @@ module AwesomePrint
         ensure
           options[:plain], options[:multiline] = plain, multiline
         end
+
+        def old_hash_syntax_format(key, value)
+          formatter.align(key, width) << formatter.colorize(" => ", :hash) << inspector.awesome(value)
+        end
+
+        def new_hash_syntax_format(key, value)
+          key[0] = ''
+          formatter.align(key, width - 1) << formatter.colorize(": ", :hash) << inspector.awesome(value)
+        end
+
+        def is_a_symbol?(key)
+          key[0] == ':'
+        end
     end
   end
 end

lib/awesome_print/inspector.rb

@@ -14,6 +14,7 @@ module AwesomePrint
         :raw              => false,  # Do not recursively format object instance variables.
         :sort_keys        => false,  # Do not sort hash keys.
         :limit            => false,  # Limit large output for arrays and hashes. Set to a boolean or integer.
+        :new_hash_syntax  => false,  # Use the foo: 'bar' syntax, when the key is a symbol
         :color => {
           :args       => :pale,
           :array      => :white,

spec/formats_spec.rb

@@ -275,6 +275,24 @@ EOS
 EOS
     end
 
+    it "new hash syntax" do
+      expect(@hash.ai(:plain => true, :new_hash_syntax => true)).to eq <<-EOS.strip
+{
+    1 => {
+        sym: {
+            "str" => {
+                [ 1, 2, 3 ] => {
+                    { k: :v } => Hash < Object
+                }
+            }
+        }
+    }
+}
+EOS
+    end
+
+
+
     it "plain multiline indented" do
       expect(@hash.ai(:plain => true, :indent => 1)).to eq <<-EOS.strip
 {
@@ -311,6 +329,22 @@ EOS
 EOS
     end
 
+    it "colored with new hash syntax" do
+      expect(@hash.ai(:new_hash_syntax => true)).to eq <<-EOS.strip
+{
+    1\e[0;37m => \e[0m{
+        sym\e[0;37m: \e[0m{
+            \"str\"\e[0;37m => \e[0m{
+                [ 1, 2, 3 ]\e[0;37m => \e[0m{
+                    { k: :v }\e[0;37m => \e[0m\e[1;33mHash < Object\e[0m
+                }
+            }
+        }
+    }
+}
+EOS
+    end
+
     it "colored multiline indented" do
       expect(@hash.ai(:indent => 2)).to eq <<-EOS.strip
 {