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a better error message

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krasimir
2017-03-07 23:17:24 +00:00
parent 31cd69b730
commit f1240ef489
1 changed files with 2 additions and 1 deletions
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3
src/compiler/GF/Compile/TypeCheck/ConcreteNew.hs
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@@ -480,7 +480,8 @@ subsCheckRho ge scope t ty1@(VRecType rs1) ty2@(VRecType rs2) = do -- Rule
let fields = [(l,ty2,lookup l rs1) | (l,ty2) <- rs2]
case [l | (l,_,Nothing) <- fields] of
[] -> return ()
missing -> tcError ("Missing fields:" <+> hsep missing)
missing -> tcError ("In the term" <+> pp t $$
"there are no values for fields:" <+> hsep missing)
rs <- sequence [mkField scope l t ty1 ty2 | (l,ty2,Just ty1) <- fields, Just t <- [mkProj l]]
return (mkWrap (R rs))
subsCheckRho ge scope t tau1 tau2 = do -- Rule EQ