diff options
Diffstat (limited to 'ghc/compiler/yaccParser/U_list.hs')
| -rw-r--r-- | ghc/compiler/yaccParser/U_list.hs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/ghc/compiler/yaccParser/U_list.hs b/ghc/compiler/yaccParser/U_list.hs new file mode 100644 index 0000000000..7e73e77129 --- /dev/null +++ b/ghc/compiler/yaccParser/U_list.hs @@ -0,0 +1,20 @@ + + +module U_list where +import UgenUtil +import Util +data U_list = U_lcons U_VOID_STAR U_list | U_lnil + +rdU_list :: _Addr -> UgnM U_list +rdU_list t + = ioToUgnM (_ccall_ tlist t) `thenUgn` \ tag@(I# _) -> + if tag == ``lcons'' then + ioToUgnM (_ccall_ lhd t) `thenUgn` \ x_lhd -> + rdU_VOID_STAR x_lhd `thenUgn` \ y_lhd -> + ioToUgnM (_ccall_ ltl t) `thenUgn` \ x_ltl -> + rdU_list x_ltl `thenUgn` \ y_ltl -> + returnUgn (U_lcons y_lhd y_ltl) + else if tag == ``lnil'' then + returnUgn (U_lnil ) + else + error ("rdU_list: bad tag selection:"++show tag++"\n") |