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Text.PrettyPrint.HughesPJ: Bug fixes, performance improvement
In summary, I propose to
- fix a bug in fillNB and one in fillNB/sepNB
- correct documentation on laws and invariants.
- add more efficient implementations of vcat,hsep,hcat
More specifically:
(1) Bugfix fillNB: Additional case for fillNB Empty (Empty : ys)
(2) Bugfix f: do not allow overlapping ($$) in vertical composition
(3) Lazy implementations of vcat,hcat and hsep
(4) Law <t2> isn't always true
(5) Invariant 5 should be made stronger
(6) Change the comment about negative indentation
Please see the attached patch
best regards, benedikt
Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.8.3 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | libraries/pretty |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | Unknown |
| Architecture | Unknown |