Simon Peyton-Jones <[EMAIL PROTECTED]> writes:
> Another small but long-standing bug in the Haskell Library > report: [...] > > [...] (How do these bugs last so long?) None of the compilers actually use the report Prelude/libraries. When writing the STG-Hugs backend I used the actual report code with some minor modifications (see note at end). The result was something that could be diffed against the original or could be executed and used with a testsuite. This turned up a lot of minor errors in the report. I think this is the only way we'll catch problems in the report. (Ideally, the report would take the form of a model Haskell compiler and library...) -- Alastair Reid [EMAIL PROTECTED] Reid Consulting (UK) Limited http://www.reid-consulting-uk.ltd.uk/alastair/ The main changes needed to the report to make it work with STG-Hugs were: 1) Fill in the ...'s 2) Since Hugs lacks mutually recursive modules, modify the module headers to read something like: Prelude.hs: module Prelude( <whatever Prelude exports> ) where import PreludeCore List.hs: module List( <whatever List exports> ) where import PreludeCore Char.hs: module Char( <whatever Char exports> ) where import PreludeCore PreludeCore.hs: #ifdef __HUGS__ module PreludeCore where #include "ReportPreludeList.hs" #include "ReportList.hs" #include "ReportChar.hs" #include "ReportNumeric.hs" #else /* use original text */ module Prelude( .... ) where import PreludeList import List import Char import Numeric #endif ... rest of file as in Prelude in Haskell Report _______________________________________________ Haskell mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell
