diff options
Diffstat (limited to 'language/scanning.rst')
| -rw-r--r-- | language/scanning.rst | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/language/scanning.rst b/language/scanning.rst index 3ed9bfe..a141b41 100644 --- a/language/scanning.rst +++ b/language/scanning.rst @@ -13,18 +13,18 @@ Scanning keyword One of the literal words ``bool``, ``break``, ``case``, ``char``, ``const``, ``continue``, ``default``, ``do``, ``double``, - ``else``, ``enum``, ``extern``, ``float``, ``for``, ``fragile``, + ``else``, ``enum``, ``extern``, ``false``, ``float``, ``for``, ``fragile``, ``function``, ``if``, :crowbar:ref:`include <IncludeStatement>`, ``int``, ``long``, ``opaque``, ``return``, - ``short``, ``signed``, ``sizeof``, ``struct``, ``switch``, ``union``, + ``short``, ``signed``, ``sizeof``, ``struct``, ``switch``, ``true``, ``union``, ``unsigned``, ``void``, or ``while``. - + identifier A nonempty sequence of characters blah blah blah .. todo:: figure out https://www.unicode.org/reports/tr31/tr31-33.html - + constant A numeric (or numeric-equivalent) value specified directly within the code. May be a :term:`decimal constant`, a :term:`binary constant` , an :term:`octal constant`, @@ -50,12 +50,12 @@ Scanning floating-point constant A sequence of characters matching the regular expression ``[0-9_]+\.[0-9_]+([eE][+-]?[0-9_]+)?``. - + .. note:: Unlike in C and many other languages, ``6e3`` in Crowbar is not a valid floating-point constant. The Crowbar-compatible spelling is ``6.0e3``. - + Denotes the numeric value of the given decimal number, optionally expressed in scientific notation. That is, ``XeY`` denotes :math:`X * 10^Y`. @@ -63,12 +63,12 @@ Scanning A sequence of characters matching the regular expression ``0(fx|FX)[0-9a-fA-F_]+\.[0-9a-fA-F_]+[pP][+-]?[0-9_]+``. Denotes the numeric value of the given hexadecimal number expressed in binary scientific notation. That is, ``XpY`` denotes :math:`X * 2^Y`. - + character constant A pair of single quotes ``'`` surrounding either a single character or an :term:`escape sequence`. The single character may not be a single quote or a backslash ``\``. Denotes the Unicode scalar value for either the single surrounded character or the character denoted by the escape sequence. - + escape sequence One of the following pairs of characters: @@ -79,7 +79,7 @@ Scanning * ``\n``, denoting the line feed, or newline (U+000A) * ``\t``, denoting the (horizontal) tab (U+0009) * ``\0``, denoting a null character (U+0000) - + Or a sequence of characters matching one of the following regular expressions: * ``\\x[0-9a-fA-F]{2}``, denoting the numeric value of the given two hexadecimal digits @@ -101,13 +101,13 @@ Scanning whitespace A nonempty sequence of characters that each has a Unicode general category of either Control (``Cc``) or Separator (``Z``). Separates tokens. - + comment Text that the compiler should ignore. May be a :term:`line comment` or a :term:`block comment`. - + line comment A sequence of characters beginning with the characters ``//`` (outside of a :term:`string literal` or :term:`comment`) and ending with a newline character U+000A. - + block comment A sequence of characters beginning with the characters ``/*`` (outside of a :term:`string literal` or :term:`comment`) and ending with the characters ``*/``. |