diff options
Diffstat (limited to 'src/compiler/GF/Compile/Compute')
| -rw-r--r-- | src/compiler/GF/Compile/Compute/ConcreteNew.hs | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/src/compiler/GF/Compile/Compute/ConcreteNew.hs b/src/compiler/GF/Compile/Compute/ConcreteNew.hs index a9ae63960..ea55e77cb 100644 --- a/src/compiler/GF/Compile/Compute/ConcreteNew.hs +++ b/src/compiler/GF/Compile/Compute/ConcreteNew.hs @@ -291,9 +291,17 @@ glue env (v1,v2) = glu v1 v2 vt v = case value2term loc (local env) v of Left i -> Error ('#':show i) Right t -> t - in error . render $ - ppL loc (hang "unsupported token gluing:" 4 - (Glue (vt v1) (vt v2))) + originalMsg = render $ ppL loc (hang "unsupported token gluing" 4 + (Glue (vt v1) (vt v2))) + term = render $ pp $ Glue (vt v1) (vt v2) + in error $ unlines + [originalMsg + ,"" + ,"There was a problem in the expression `"++term++"`, either:" + ,"1) You are trying to use + on runtime arguments, possibly via an oper." + ,"2) One of the arguments in `"++term++"` is a bound variable from pattern matching a string, but the cases are non-exhaustive." + ,"For more help see https://github.com/GrammaticalFramework/gf-core/tree/master/doc/errors/gluing.md" + ] -- | to get a string from a value that represents a sequence of terminals @@ -546,7 +554,7 @@ value2term' stop loc xs v0 = linPattVars p = if null dups then return pvs - else fail.render $ hang "Pattern is not linear:" 4 (ppPatt Unqualified 0 p) + else fail.render $ hang "Pattern is not linear. All variable names on the left-hand side must be distinct." 4 (ppPatt Unqualified 0 p) where allpvs = allPattVars p pvs = nub allpvs |