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| author | Simon Peyton Jones <simonpj@microsoft.com> | 2016-06-11 23:49:27 +0100 |
|---|---|---|
| committer | Simon Peyton Jones <simonpj@microsoft.com> | 2016-06-13 10:57:03 +0100 |
| commit | 15b9bf4ba4ab47e6809bf2b3b36ec16e502aea72 (patch) | |
| tree | e2e7336c63e9b7130ba70f3551ff290d4a25184b /testsuite/tests/rename/should_fail | |
| parent | d25cb61a1c2a135a2564143a332f8b2962f134bc (diff) | |
| download | haskell-15b9bf4ba4ab47e6809bf2b3b36ec16e502aea72.tar.gz | |
Improve typechecking of let-bindings
This major commit was initially triggered by #11339, but it spiraled
into a major review of the way in which type signatures for bindings
are handled, especially partial type signatures. On the way I fixed a
number of other bugs, namely
#12069
#12033
#11700
#11339
#11670
The main change is that I completely reorganised the way in which type
signatures in bindings are handled. The new story is in TcSigs
Note [Overview of type signatures]. Some specific:
* Changes in the data types for signatures in TcRnTypes:
TcIdSigInfo and new TcIdSigInst
* New module TcSigs deals with typechecking type signatures
and pragmas. It contains code mostly moved from TcBinds,
which is already too big
* HsTypes: I swapped the nesting of HsWildCardBndrs
and HsImplicitBndsrs, so that the wildcards are on the
oustide not the insidde in a LHsSigWcType. This is just
a matter of convenient, nothing deep.
There are a host of other changes as knock-on effects, and
it all took FAR longer than I anticipated :-). But it is
a significant improvement, I think.
Lots of error messages changed slightly, some just variants but
some modest improvements.
New tests
* typecheck/should_compile
* SigTyVars: a scoped-tyvar test
* ExPat, ExPatFail: existential pattern bindings
* T12069
* T11700
* T11339
* partial-sigs/should_compile
* T12033
* T11339a
* T11670
One thing to check:
* Small change to output from ghc-api/landmines.
Need to check with Alan Zimmerman
Diffstat (limited to 'testsuite/tests/rename/should_fail')
| -rw-r--r-- | testsuite/tests/rename/should_fail/rnfail026.stderr | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/testsuite/tests/rename/should_fail/rnfail026.stderr b/testsuite/tests/rename/should_fail/rnfail026.stderr index 63a1a2130d..6c032b0487 100644 --- a/testsuite/tests/rename/should_fail/rnfail026.stderr +++ b/testsuite/tests/rename/should_fail/rnfail026.stderr @@ -1,10 +1,11 @@ - -rnfail026.hs:16:27: error: - • Expected kind ‘* -> *’, but ‘Set a’ has kind ‘*’ - • In the first argument of ‘Monad’, namely - ‘forall a. Eq a => Set a’ - In the instance declaration for ‘Monad (forall a. Eq a => Set a)’ - -rnfail026.hs:19:10: error: - • Illegal polymorphic type: forall a. [a] - • In the instance declaration for ‘Eq (forall a. [a])’ +
+rnfail026.hs:16:27: error:
+ • Expecting one fewer arguments to ‘Set a’
+ Expected kind ‘* -> *’, but ‘Set a’ has kind ‘*’
+ • In the first argument of ‘Monad’, namely
+ ‘forall a. Eq a => Set a’
+ In the instance declaration for ‘Monad (forall a. Eq a => Set a)’
+
+rnfail026.hs:19:10: error:
+ • Illegal polymorphic type: forall a. [a]
+ • In the instance declaration for ‘Eq (forall a. [a])’
|