Merge pull request #858 from Denton-L/quotes-docs

Document existence of single-quotes

docs/control-structures.rst

@@ -337,7 +337,7 @@ Inline assembly parses comments, literals and identifiers exactly as Solidity, s
 usual ``//`` and ``/* */`` comments. Inline assembly is initiated by ``assembly { ... }`` and inside
 these curly braces, the following can be used (see the later sections for more details)
 
- - literals, i.e. ``0x123``, ``42`` or ``"abc"`` (strings up to 32 characters)
+ - literals, e.g. ``0x123``, ``42`` or ``"abc"`` (strings up to 32 characters)
  - opcodes (in "instruction style"), e.g. ``mload sload dup1 sstore``, for a list see below
  - opcodes in functional style, e.g. ``add(1, mlod(0))``
  - labels, e.g. ``name:``

docs/frequently-asked-questions.rst

@@ -399,7 +399,7 @@ What character set does Solidity use?
 =====================================
 
 Solidity is character set agnostic concerning strings in the source code, although
-utf-8 is recommended. Identifiers (variables, functions, ...) can only use
+UTF-8 is recommended. Identifiers (variables, functions, ...) can only use
 ASCII.
 
 What are some examples of basic string manipulation (``substring``, ``indexOf``, ``charAt``, etc)?
@@ -741,15 +741,15 @@ see a 32-byte hex value, this is just ``"stringliteral"`` in hex.
 The type ``bytes`` is similar, only that it can change its length.
 
 Finally, ``string`` is basically identical to ``bytes`` only that it is assumed
-to hold the utf-8 encoding of a real string. Since ``string`` stores the
+to hold the UTF-8 encoding of a real string. Since ``string`` stores the
-data in utf-8 encoding it is quite expensive to compute the number of
+data in UTF-8 encoding it is quite expensive to compute the number of
 characters in the string (the encoding of some characters takes more
 than a single byte). Because of that, ``string s; s.length`` is not yet
 supported and not even index access ``s[2]``. But if you want to access
 the low-level byte encoding of the string, you can use
 ``bytes(s).length`` and ``bytes(s)[2]`` which will result in the number
-of bytes in the utf-8 encoding of the string (not the number of
+of bytes in the UTF-8 encoding of the string (not the number of
-characters) and the second byte (not character) of the utf-8 encoded
+characters) and the second byte (not character) of the UTF-8 encoded
 string, respectively.
 
 

docs/style-guide.rst

@@ -118,7 +118,7 @@ Source File Encoding
 UTF-8 or ASCII encoding is preferred.
 
 Imports
-==========
+=======
 
 Import statements should always be placed at the top of the file.
 
@@ -519,6 +519,18 @@ No::
 Other Recommendations
 =====================
 
+* Strings should be quoted with double-quotes instead of single-quotes.
+
+Yes::
+
+    str = "foo";
+    str = "Hamlet says, 'To be or not to be...'";
+
+No::
+
+    str = 'bar';
+    str = '"Be yourself; everyone else is already taken." -Oscar Wilde';
+
 * Surround operators with a single space on either side.
 
 Yes::

docs/types.rst

@@ -147,10 +147,10 @@ Dynamically-sized byte array
 ``bytes``:
     Dynamically-sized byte array, see :ref:`arrays`. Not a value-type!
 ``string``:
-    Dynamically-sized UTF8-encoded string, see :ref:`arrays`. Not a value-type!
+    Dynamically-sized UTF-8-encoded string, see :ref:`arrays`. Not a value-type!
 
 As a rule of thumb, use ``bytes`` for arbitrary-length raw byte data and ``string``
-for arbitrary-length string (utf-8) data. If you can limit the length to a certain
+for arbitrary-length string (UTF-8) data. If you can limit the length to a certain
 number of bytes, always use one of ``bytes1`` to ``bytes32`` because they are much cheaper.
 
 .. index:: ! ufixed, ! fixed, ! fixed point number
@@ -214,9 +214,9 @@ a non-rational number).
 String Literals
 ---------------
 
-String Literals are written with double quotes (``"abc"``). As with integer literals, their type can vary, but they are implicitly convertible to ``bytes1``, ..., ``bytes32`` if they fit, to ``bytes`` and to ``string``.
+String literals are written with either double or single-quotes (``"foo"`` or ``'bar'``). As with integer literals, their type can vary, but they are implicitly convertible to ``bytes1``, ..., ``bytes32``, if they fit, to ``bytes`` and to ``string``.
 
-String Literals support escape characters, such as ``\n``, ``\xNN`` and ``\uNNNN``. ``\xNN`` takes a hex value and inserts the appropriate byte, while ``\uNNNN`` takes a Unicode codepoint and inserts an UTF8 sequence.
+String literals support escape characters, such as ``\n``, ``\xNN`` and ``\uNNNN``. ``\xNN`` takes a hex value and inserts the appropriate byte, while ``\uNNNN`` takes a Unicode codepoint and inserts an UTF-8 sequence.
 
 .. index:: enum
 
@@ -353,7 +353,7 @@ So ``bytes`` should always be preferred over ``byte[]`` because it is cheaper.
 .. note::
     If you want to access the byte-representation of a string ``s``, use
     ``bytes(s).length`` / ``bytes(s)[7] = 'x';``. Keep in mind
-    that you are accessing the low-level bytes of the utf-8 representation,
+    that you are accessing the low-level bytes of the UTF-8 representation,
     and not the individual characters!
 
 .. index:: ! array;allocating, new