BNFC.Backend.Common

Functions common to different backends.

Documentation

unicodeAndSymbols :: CF -> [String]

asciiKeywords :: CF -> [String]

flexEps :: String

Representation of the empty word as Flex regular expression

renderListSepByPrecedence

Arguments

:: Doc

Name of the coercion level variable

-> (String -> Doc)

render function

-> [(Integer, String)]

separators by precedence

-> Doc

Helper function for c-like languages that generates the code printing the list separator according to the given precedence level:

>>> let my_render c = "my_render(\"" <> text c <> "\")"
>>> renderListSepByPrecedence "x" my_render []

>>> renderListSepByPrecedence "x" my_render [(0,",")]
my_render(",");

>>> renderListSepByPrecedence "x" my_render [(3,";"), (1, "--")]
switch(x)
{
  case 3: my_render(";"); break;
  default: my_render("--");
}