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allow module export of nonterminals (#281)

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This commit is contained in:
Mark Thom
2020-03-13 15:40:03 -06:00
parent 7e7a1b2caf
commit 7260eba26a
1 changed files with 8 additions and 4 deletions
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12
src/prolog/machine/toplevel.rs
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@@ -224,8 +224,8 @@ fn setup_op_decl(
fn setup_predicate_indicator(term: &mut Term) -> Result<PredicateKey, ParserError>
{
match term {
Term::Clause(_, ref name, ref mut terms, Some(_))
if name.as_str() == "/" && terms.len() == 2 =>
Term::Clause(_, ref slash, ref mut terms, Some(_))
if (slash.as_str() == "/" || slash.as_str() == "//") && terms.len() == 2 =>
{
let arity = *terms.pop().unwrap();
let name = *terms.pop().unwrap();
@@ -241,8 +241,12 @@ fn setup_predicate_indicator(term: &mut Term) -> Result<PredicateKey, ParserErro
.and_then(|c| c.to_atom())
.ok_or(ParserError::InvalidModuleExport)?;
Ok((name, arity))
}
if slash.as_str() == "/" {
Ok((name, arity))
} else {
Ok((name, arity + 2))
}
}
_ => Err(ParserError::InvalidModuleExport),
}
}