rishi/scryer-prolog
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add db refs

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This commit is contained in:
Mark Thom
2019-03-27 23:00:59 -06:00
parent e7bc01369a
commit 381ad12104
8 changed files with 146 additions and 79 deletions
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10
src/prolog/write.rs
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@@ -159,10 +159,20 @@ impl fmt::Display for HeapCellValue {
}
}
impl fmt::Display for DBRef {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
&DBRef::BuiltInPred(ref name, arity) => write!(f, "db_ref:builtin:{}/{}", name, arity),
&DBRef::NamedPred(ref name, arity) => write!(f, "db_ref:named:{}/{}", name, arity)
}
}
}
impl fmt::Display for Addr {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
&Addr::Con(ref c) => write!(f, "Addr::Con({})", c),
&Addr::DBRef(ref db_ref) => write!(f, "Addr::DBRef({})", db_ref),
&Addr::Lis(l) => write!(f, "Addr::Lis({})", l),
&Addr::AttrVar(h) => write!(f, "Addr::AttrVar({})", h),
&Addr::HeapCell(h) => write!(f, "Addr::HeapCell({})", h),