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| author | Ben Gamari <bgamari.foss@gmail.com> | 2015-06-16 20:01:22 +0200 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2015-06-16 20:01:22 +0200 |
| commit | 1ff7f09b3abedb2a6daf384b55ad3d0134f0d174 (patch) | |
| tree | 34ad913bdc6f19ab1151d90cfa14e4aedf9ffe58 /testsuite/tests/parser/should_fail/readFail034.stderr | |
| parent | b0d8ba368f031279444c851dbca499d7e272f74c (diff) | |
| download | haskell-1ff7f09b3abedb2a6daf384b55ad3d0134f0d174.tar.gz | |
Lexer: Suggest adding 'let' on unexpected '=' token
Summary:
I've heard numerous fledgling Haskeller's complain about the behavior of
ghci regarding bindings. While most REPLs accept bindings of the form
`x = 42`, GHCi is implicitly a `do` block, meaning that the user must
know to use a `let` to introduce a binding.
Here we suggest to the user that they may need a `let` and give them a
small example in the event that we find an unexpected `=` token.
Reviewers: austin
Reviewed By: austin
Subscribers: thomie, bgamari
Differential Revision: https://phabricator.haskell.org/D980
Diffstat (limited to 'testsuite/tests/parser/should_fail/readFail034.stderr')
| -rw-r--r-- | testsuite/tests/parser/should_fail/readFail034.stderr | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/testsuite/tests/parser/should_fail/readFail034.stderr b/testsuite/tests/parser/should_fail/readFail034.stderr index 027d0ca13f..75156c9ae4 100644 --- a/testsuite/tests/parser/should_fail/readFail034.stderr +++ b/testsuite/tests/parser/should_fail/readFail034.stderr @@ -1,2 +1,5 @@ -readFail034.hs:4:6: parse error on input ‘=’ +readFail034.hs:4:6: error: + parse error on input ‘=’ + Perhaps you need a 'let' in a 'do' block? + e.g. 'let x = 5' instead of 'x = 5' |