Pygment.ex

# Numbers
0b0101011
1234 ; 0x1A ; 0xbeef ; 0763 ; 0o123
3.14 ; 5.0e21 ; 0.5e-12
100_000_000

# these are not valid numbers
0b012 ; 0xboar ; 0o888
0B01 ; 0XAF ; 0O123

# Characters
?a ; ?1 ; ?\n ; ?\s ; ?\c ; ? ; ?,
?\x{12} ; ?\x{abcd}
?\x34 ; ?\xF

# these show that only the first digit is part of the character
?\123 ; ?\12 ; ?\7

# Atoms
:this ; :that
:'complex atom'
:"with' \"\" 'quotes"
:... ; :<<>> ; :%{} ; :% ; :{}
:++; :--; :*; :~~~; :::
:% ; :. ; :<-

# Strings
"Hello world"
"Interspersed \x{ff} codes \7 \8 \65 \016 and \t\s\\s\z\+ \\ escapes"
"Quotes ' inside \" \123 the \"\" \xF \\xF string \\\" end"
"Multiline
   string"

# Char lists
'this is a list'
'escapes \' \t \\\''
'Multiline
    char
  list
'

# Binaries
<<1, 2, 3>>
<<"hello"::binary, c :: utf8, x::[4, unit(2)]>> = "hello™1"

# Sigils
~r/this + i\s "a" regex/
~R'this + i\s "a" regex too'
~w(hello #{ ["has" <> "123", '\c\d', "\123 interpol" | []] } world)s
~W(hello #{no "123" \c\d \123 interpol} world)s

~s{Escapes terminators \{ and \}, but no {balancing} # outside of sigil here }

~S"No escapes \s\t\n and no #{interpolation}"

:"atoms work #{"to" <> "o"}"

# Operators
x = 1 + 2.0 * 3
y = true and false; z = false or true
... = 144
... == !x && y || z
"hello" |> String.upcase |> String.downcase()
{^z, a} = {true, x}

# Free operators (added in 1.0.0)
p  ~>> f  = bind(p, f)
p1 ~>  p2 = pair_right(p1, p2)
p1 <~  p2 = pair_left(p1, p2)
p1 <~> p2 = pair_both(p1, p2)
p  |~> f  = map(p, f)
p1 <|> p2 = either(p1, p2)

# Lists, tuples, maps, keywords
[1, :a, 'hello'] ++ [2, 3]
[:head | [?t, ?a, ?i, ?l]]

{:one, 2.0, "three"}

[...: "this", <<>>: "is", %{}: "a keyword", %: "list", {}: "too"]
["this is an atom too": 1, "so is this": 2]
[option: "value", key: :word]
[++: "operator", ~~~: :&&&]

map = %{shortcut: "syntax"}
%{map | "update" => "me"}
%{ 12 => 13, :weird => ['thing'] }

# Comprehensions
for x <- 1..10, x < 5, do: {x, x}
pixels = "12345678"
for << <<r::4, g::4, b::4, a::size(4)>> <- pixels >> do
  [r, {g, %{"b" => a}}]
end

# String interpolation
"String #{inspect "interpolation"} is quite #{1+4+7} difficult"

# Identifiers
abc_123 = 1
_018OP = 2
A__0 == 3

## Modules
#defmodule Long.Module.Name do
#  @moduledoc "Simple module docstring"
#
#  @doc """
#  Multiline docstring
#  "with quotes"
#  and #{ inspect %{"interpolation" => "in" <> "action"} }
#  now with #{ {:a, 'tuple'} }
#  and #{ inspect {
#      :tuple,
#      %{ with: "nested #{ inspect %{ :interpolation => %{} } }" }
#  } }
#  """
#  defstruct [:a, :name, :height]
#
#  @doc ~S'''
#  No #{interpolation} of any kind.
#  \000 \x{ff}
#
#  \n #{\x{ff}}
#  '''
#  def func(a, b \\ []), do: :ok
#
#  @doc false
#  def __before_compile__(_) do
#    :ok
#  end
#end
#
## Structs
#defmodule Second.Module do
#  s = %Long.Module.Name{name: "Silly"}
#  %Long.Module.Name{s | height: {192, :cm}}
#  ".. #{%Long.Module.Name{s | height: {192, :cm}}} .."
#end
#
## Types, pseudo-vars, attributes
#defmodule M do
#  @custom_attr :some_constant
#
#  @before_compile Long.Module.Name
#
#  @typedoc "This is a type"
#  @type typ :: integer
#
#  @typedoc """
#  Another type
#  """
#  @opaque typtyp :: 1..10
#
#  @spec func(typ, typtyp) :: :ok | :fail
#  def func(a, b) do
#    a || b || :ok || :fail
#    Path.expand("..", __DIR__)
#    IO.inspect __ENV__
#    __NOTAPSEUDOVAR__ = 11
#    __MODULE__.func(b, a)
#  end
#
#  defmacro m() do
#    __CALLER__
#  end
#end
#
## Functions
#anon = fn x, y, z ->
#  fn(a, b, c) ->
#    &(x + y - z * a / &1 + b + div(&2, c))
#  end
#end
#
#&Set.put(&1, &2) ; & Set.put(&1, &2) ; &( Set.put(&1, &1) )
#
## Function calls
#anon.(1, 2, 3); self; hd([1,2,3])
#Kernel.spawn(fn -> :ok end)
#IO.ANSI.black
#
## Control flow
#if :this do
#  :that
#else
#  :otherwise
#end
#
#pid = self
#receive do
#  {:EXIT, _} -> :done
#  {^pid, :_} -> nil
#  after 100 -> :no_luck
#end
#
#case __ENV__.line do
#  x when is_integer(x) -> x
#  x when x in 1..12 -> -x
#end
#
#cond do
#  false -> "too bad"
#  4 > 5 -> "oops"
#  true -> nil
#end
#
## Lexical scope modifiers
#import Kernel, except: [spawn: 1, +: 2, /: 2, Unless: 2]
#alias Long.Module.Name, as: N0men123_and4
#use Bitwise
#
#4 &&& 5
#2 <<< 3
#
## Protocols
#defprotocol Useless do
#  def func1(this)
#  def func2(that)
#end
#
#defimpl Useless, for: Atom do
#end
#
## Exceptions
#defmodule NotAnError do
#  defexception [:message]
#end
#
#raise NotAnError, message: "This is not an error"