diff options
Diffstat (limited to 'src/mono_opt.sml')
| -rw-r--r-- | src/mono_opt.sml | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/src/mono_opt.sml b/src/mono_opt.sml index 2f98a9c7..c9cd5f84 100644 --- a/src/mono_opt.sml +++ b/src/mono_opt.sml @@ -52,7 +52,6 @@ fun exp e = EPrim (Prim.String (String.implode (rev chs))) end - | EStrcat ((EPrim (Prim.String s1), loc), (EPrim (Prim.String s2), _)) => let val s = @@ -65,8 +64,27 @@ fun exp e = in EPrim (Prim.String s) end + + | EStrcat ((EPrim (Prim.String s1), loc), (EStrcat ((EPrim (Prim.String s2), _), rest), _)) => + let + val s = + if size s1 > 0 andalso size s2 > 0 + andalso Char.isSpace (String.sub (s1, size s1 - 1)) + andalso Char.isSpace (String.sub (s2, 0)) then + s1 ^ String.extract (s2, 1, NONE) + else + s1 ^ s2 + in + EStrcat ((EPrim (Prim.String s), loc), rest) + end + + | EStrcat ((EStrcat (e1, e2), loc), e3) => + optExp (EStrcat (e1, (EStrcat (e2, e3), loc)), loc) + | _ => e +and optExp e = #1 (U.Exp.map {typ = typ, exp = exp} e) + val optimize = U.File.map {typ = typ, exp = exp, decl = decl} end |