diff options
Diffstat (limited to 'src/interp/buildom.boot')
| -rw-r--r-- | src/interp/buildom.boot | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/interp/buildom.boot b/src/interp/buildom.boot index 81ad8d1e..ce70aa08 100644 --- a/src/interp/buildom.boot +++ b/src/interp/buildom.boot @@ -203,6 +203,20 @@ coerceUn2E(x,source) == --% Mapping -- Want to eventually have elt: ($, args) -> target +++ Implementation of the `MappinCategory' as builtin. +++ A domain that satisfy this predicate provides implementation +++ to abstraction that map values from some type to values +++ of another type. +MappingCategory(:"sig") == + sig = nil => + error '"MappingCategory requires at least one argument" + cat := eval ['Join,$Type, + ['mkCategory,quoteForm 'domain, + quoteForm [[['elt,[first sig,'$,:rest sig]],true]], + [], [], nil]] + vectorRef(cat,0) := ['MappingCategory,:sig] + cat + Mapping(:args) == srcArgs := [devaluate a for a in args] nargs := #args |