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Don't output "\n **" if helpfulMsg is empty.

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This commit is contained in:
Inari Listenmaa
2020-06-04 20:19:06 +02:00
parent 414c2a1a5f
commit dbc7297d80
1 changed files with 3 additions and 2 deletions
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5
src/compiler/GF/Compile/TypeCheck/RConcrete.hs
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@@ -652,13 +652,14 @@ checkEqLType gr g t u trm = do
helpfulMsg = helpfulMsg =
case (arrows inferredType, arrows expectedType) of case (arrows inferredType, arrows expectedType) of
(0,0) -> pp "" -- None of the types is a function (0,0) -> pp "" -- None of the types is a function
_ -> if expectedType `isLessApplied` inferredType _ -> "\n **" <+>
if expectedType `isLessApplied` inferredType
then "Maybe you gave too few arguments to" <+> funName then "Maybe you gave too few arguments to" <+> funName
else pp "Double-check that type signature and number of arguments match." else pp "Double-check that type signature and number of arguments match."
in checkError $ s <+> "type of" <+> term $$ in checkError $ s <+> "type of" <+> term $$
"expected:" <+> expectedType $$ -- ppqType t u $$ "expected:" <+> expectedType $$ -- ppqType t u $$
"inferred:" <+> inferredType $$ -- ppqType u t "inferred:" <+> inferredType $$ -- ppqType u t
"\n **" <+> helpfulMsg <+> "\n" helpfulMsg
where where
-- count the number of arrows in the prettyprinted term -- count the number of arrows in the prettyprinted term
arrows :: Doc -> Int arrows :: Doc -> Int