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| author | Ben Gamari <ben@smart-cactus.org> | 2015-06-16 20:04:02 +0200 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2015-06-16 20:04:02 +0200 |
| commit | 0d6c97ba1267a53825809f3c99364f7aa38f0847 (patch) | |
| tree | 909024bee2d533ffa1130e96a89b574846d097cc /testsuite | |
| parent | df63736341d8b92c0f7f0012bf88929e32a1403f (diff) | |
| parent | 1ff7f09b3abedb2a6daf384b55ad3d0134f0d174 (diff) | |
| download | haskell-0d6c97ba1267a53825809f3c99364f7aa38f0847.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')
| -rw-r--r-- | testsuite/tests/ghci/should_run/T9915.stderr | 5 | ||||
| -rw-r--r-- | testsuite/tests/parser/should_fail/readFail011.stderr | 5 | ||||
| -rw-r--r-- | testsuite/tests/parser/should_fail/readFail034.stderr | 5 |
3 files changed, 12 insertions, 3 deletions
diff --git a/testsuite/tests/ghci/should_run/T9915.stderr b/testsuite/tests/ghci/should_run/T9915.stderr index de2c5cb286..333f17ac81 100644 --- a/testsuite/tests/ghci/should_run/T9915.stderr +++ b/testsuite/tests/ghci/should_run/T9915.stderr @@ -1,2 +1,5 @@ -<interactive>:3:9: parse error on input ‘=’ +<interactive>:3:9: error: + parse error on input ‘=’ + Perhaps you need a 'let' in a 'do' block? + e.g. 'let x = 5' instead of 'x = 5' diff --git a/testsuite/tests/parser/should_fail/readFail011.stderr b/testsuite/tests/parser/should_fail/readFail011.stderr index 5c5504ba9a..25accd2a19 100644 --- a/testsuite/tests/parser/should_fail/readFail011.stderr +++ b/testsuite/tests/parser/should_fail/readFail011.stderr @@ -1,2 +1,5 @@ -readFail011.hs:7:10: parse error on input ‘=’ +readFail011.hs:7:10: error: + parse error on input ‘=’ + Perhaps you need a 'let' in a 'do' block? + e.g. 'let x = 5' instead of 'x = 5' 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' |