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| author |  Adam Chlipala <adam@chlipala.net> | 2014-12-03 21:21:37 -0500 |
|---|---|---|
| committer | Adam Chlipala <adam@chlipala.net> | 2014-12-03 21:21:37 -0500 |
| commit | 7639360d7a0111054b68c3fe91bb2558706aaefc (patch) | |
| tree | 5e685f48f7f8dc6a7f39dad70d9171aed82a204e /src | |
| parent | c881c3b462801bc67419783c4169302fce5e3aeb (diff) | |
MonoOpt: remove concatenation with empty string
Diffstat (limited to 'src')
| -rw-r--r-- | src/mono_opt.sml | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mono_opt.sml b/src/mono_opt.sml index a49d54e1..211b273e 100644 --- a/src/mono_opt.sml +++ b/src/mono_opt.sml @@ -166,6 +166,9 @@ fun exp e = e | EFfiApp ("Basis", "strcat", [(e1, _), (e2, _)]) => exp (EStrcat (e1, e2)) + + | EStrcat (e1, (EPrim (Prim.String (_, "")), _)) => #1 e1 + | EStrcat ((EPrim (Prim.String (_, "")), _), e2) => #1 e2 | EStrcat ((EPrim (Prim.String (Prim.Html, s1)), loc), (EPrim (Prim.String (Prim.Html, s2)), _)) => let |