Move options from #generate and #parse to common area

lib/json.rb

@@ -107,6 +107,89 @@
 #   ruby # => nil
 #   ruby.class # => NilClass
 #
+# ==== Parsing Options
+#
+# ====== Input Options
+#
+# Option +max_nesting+ (\Integer) specifies the maximum nesting depth allowed;
+# defaults to +100+; specify +false+ to disable depth checking.
+#
+# With the default, +false+:
+#   source = '[0, [1, [2, [3]]]]'
+#   ruby = JSON.parse(source)
+#   ruby # => [0, [1, [2, [3]]]]
+# Too deep:
+#   # Raises JSON::NestingError (nesting of 2 is too deep):
+#   JSON.parse(source, {max_nesting: 1})
+# Bad value:
+#   # Raises TypeError (wrong argument type Symbol (expected Fixnum)):
+#   JSON.parse(source, {max_nesting: :foo})
+#
+# ---
+#
+# Option +allow_nan+ (boolean) specifies whether to allow
+# NaN, Infinity, and MinusInfinity in +source+;
+# defaults to +false+.
+#
+# With the default, +false+:
+#   # Raises JSON::ParserError (225: unexpected token at '[NaN]'):
+#   JSON.parse('[NaN]')
+#   # Raises JSON::ParserError (232: unexpected token at '[Infinity]'):
+#   JSON.parse('[Infinity]')
+#   # Raises JSON::ParserError (248: unexpected token at '[-Infinity]'):
+#   JSON.parse('[-Infinity]')
+# Allow:
+#   source = '[NaN, Infinity, -Infinity]'
+#   ruby = JSON.parse(source, {allow_nan: true})
+#   ruby # => [NaN, Infinity, -Infinity]
+#
+# ====== Output Options
+#
+# Option +symbolize_names+ (boolean) specifies whether returned \Hash keys
+# should be Symbols;
+# defaults to +false+ (use Strings).
+#
+# With the default, +false+:
+#   source = '{"a": "foo", "b": 1.0, "c": true, "d": false, "e": null}'
+#   ruby = JSON.parse(source)
+#   ruby # => {"a"=>"foo", "b"=>1.0, "c"=>true, "d"=>false, "e"=>nil}
+# Use Symbols:
+#   ruby = JSON.parse(source, {symbolize_names: true})
+#   ruby # => {:a=>"foo", :b=>1.0, :c=>true, :d=>false, :e=>nil}
+#
+# ---
+#
+# Option +object_class+ (\Class) specifies the Ruby class to be used
+# for each \JSON object;
+# defaults to \Hash.
+#
+# With the default, \Hash:
+#   source = '{"a": "foo", "b": 1.0, "c": true, "d": false, "e": null}'
+#   ruby = JSON.parse(source)
+#   ruby.class # => Hash
+# Use class \OpenStruct:
+#   ruby = JSON.parse(source, {object_class: OpenStruct})
+#   ruby # => #<OpenStruct a="foo", b=1.0, c=true, d=false, e=nil>
+#
+# ---
+#
+# Option +array_class+ (\Class) specifies the Ruby class to be used
+# for each \JSON array;
+# defaults to \Array.
+#
+# With the default, \Array:
+#   source = '["foo", 1.0, true, false, null]'
+#   ruby = JSON.parse(source)
+#   ruby.class # => Array
+# Use class \Set:
+#   ruby = JSON.parse(source, {array_class: Set})
+#   ruby # => #<Set: {"foo", 1.0, true, false, nil}>
+#
+# ---
+#
+# Option +create_additions+ (boolean) specifies whether to use \JSON additions in parsing.
+# See {\JSON Additions}[#module-JSON-label-JSON+Additions].
+#
 # === Generating \JSON
 #
 # To generate a Ruby \String containing \JSON data,
@@ -169,6 +252,94 @@
 #   JSON.generate(Complex(0, 0)) # => '"0+0i"'
 #   JSON.generate(Dir.new('.')) # => '"#<Dir>"'
 #
+# ==== Generating Options
+#
+# ====== Input Options
+#
+# Option +allow_nan+ (boolean) specifies whether
+# +NaN+, +Infinity+, and <tt>-Infinity</tt> may be generated;
+# defaults to +false+.
+#
+# With the default, +false+:
+#   # Raises JSON::GeneratorError (920: NaN not allowed in JSON):
+#   JSON.generate(JSON::NaN)
+#   # Raises JSON::GeneratorError (917: Infinity not allowed in JSON):
+#   JSON.generate(JSON::Infinity)
+#   # Raises JSON::GeneratorError (917: -Infinity not allowed in JSON):
+#   JSON.generate(JSON::MinusInfinity)
+#
+# Allow:
+#   ruby = [Float::NaN, Float::Infinity, Float::MinusInfinity]
+#   JSON.generate(ruby, allow_nan: true) # => '[NaN,Infinity,-Infinity]'
+#
+# ---
+#
+# Option +max_nesting+ (\Integer) specifies the maximum nesting depth
+# in +obj+; defaults to +100+.
+#
+# With the default, +100+:
+#   obj = [[[[[[0]]]]]]
+#   JSON.generate(obj) # => '[[[[[[0]]]]]]'
+#
+# Too deep:
+#   # Raises JSON::NestingError (nesting of 2 is too deep):
+#   JSON.generate(obj, max_nesting: 2)
+#
+# ====== Output Options
+#
+# The default formatting options generate the most compact
+# \JSON data, all on one line and with no whitespace.
+#
+# You can use these formatting options to generate
+# \JSON data in a more open format, using whitespace.
+# See also JSON.pretty_generate.
+#
+# - Option +array_nl+ (\String) specifies a string (usually a newline)
+#   to be inserted after each \JSON array; defaults to the empty \String, <tt>''</tt>.
+# - Option +object_nl+ (\String) specifies a string (usually a newline)
+#   to be inserted after each \JSON object; defaults to the empty \String, <tt>''</tt>.
+# - Option +indent+ (\String) specifies the string (usually spaces) to be
+#   used for indentation; defaults to the empty \String, <tt>''</tt>;
+#   defaults to the empty \String, <tt>''</tt>;
+#   has no effect unless options +array_nl+ or +object_nl+ specify newlines.
+# - Option +space+ (\String) specifies a string (usually a space) to be
+#   inserted after the colon in each \JSON object's pair;
+#   defaults to the empty \String, <tt>''</tt>.
+# - Option +space_before+ (\String) specifies a string (usually a space) to be
+#   inserted before the colon in each \JSON object's pair;
+#   defaults to the empty \String, <tt>''</tt>.
+#
+# In this example, +obj+ is used first to generate the shortest
+# \JSON data (no whitespace), then again with all formatting options
+# specified:
+#
+#   obj = {foo: [:bar, :baz], bat: {bam: 0, bad: 1}}
+#   json = JSON.generate(obj)
+#   puts 'Compact:', json
+#   opts = {
+#     array_nl: "\n",
+#     object_nl: "\n",
+#     indent+: '  ',
+#     space_before: ' ',
+#     space: ' '
+#   }
+#   puts 'Open:', JSON.generate(obj, opts)
+#
+# Output:
+#   Compact:
+#   {"foo":["bar","baz"],"bat":{"bam":0,"bad":1}}
+#   Open:
+#   {
+#     "foo" : [
+#       "bar",
+#       "baz"
+#   ],
+#     "bat" : {
+#       "bam" : 0,
+#       "bad" : 1
+#     }
+#   }
+#
 # == \JSON Additions
 #
 # When you "round trip" a non-\String object from Ruby to \JSON and back,