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| Language.Preprocessor.Cpphs.Tokenise | | Portability | All | | Stability | experimental | | Maintainer | Malcolm Wallace <Malcolm.Wallace@cs.york.ac.uk> |
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| Description |
| The purpose of this module is to lex a source file (language
unspecified) into tokens such that cpp can recognise a replaceable
symbol or macro-use, and do the right thing.
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| Synopsis |
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| Documentation |
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| linesCpp :: String -> [String] | Source |
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| linesCpp is, broadly speaking, Prelude.lines, except that
on a line beginning with a #, line continuation characters are
recognised. In a line continuation, the newline character is
preserved, but the backslash is not.
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| reslash :: String -> String | Source |
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| Put back the line-continuation characters.
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| tokenise is, broadly-speaking, Prelude.words, except that:
* the input is already divided into lines
* each word-like token is categorised as one of {Ident,Other,Cmd}
* #define's are parsed and returned out-of-band using the Cmd variant
* All whitespace is preserved intact as tokens.
* C-comments are converted to white-space (depending on first param)
* Parens and commas are tokens in their own right.
* Any cpp line continuations are respected.
No errors can be raised.
The inverse of tokenise is (concatMap deWordStyle).
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| Each token is classified as one of Ident, Other, or Cmd:
* Ident is a word that could potentially match a macro name.
* Cmd is a complete cpp directive (#define etc).
* Other is anything else.
| | Constructors | |  Instances | |
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| Parse a possible macro call, returning argument list and remaining input
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| Produced by Haddock version 0.8 |
