rishi/scryer-prolog
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

correct failure to observe last call position in queries'

Browse Source
This commit is contained in:
Mark Thom
2019-11-17 20:18:11 -04:00
parent 17b2510480
commit de88fdc4dc
3 changed files with 5 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/prolog/machine/code_repo.rs
View File

@@ -134,7 +134,7 @@ impl CodeRepo {
);
Some(RefOrOwned::Owned(call_clause))
}
&CodePtr::CallN(arity, _) => {
&CodePtr::CallN(arity, _, last_call) => {
let call_clause = call_clause!(ClauseType::CallN, arity, 0, last_call);
Some(RefOrOwned::Owned(call_clause))
}

6
src/prolog/machine/machine_indices.rs
View File

@@ -309,7 +309,7 @@ pub enum REPLCodePtr {
#[derive(Clone, PartialEq)]
pub enum CodePtr {
BuiltInClause(BuiltInClauseType, LocalCodePtr), // local is the successor call.
CallN(usize, LocalCodePtr), // arity, local.
CallN(usize, LocalCodePtr, bool), // arity, local, last call.
Local(LocalCodePtr),
DynamicTransaction(DynamicTransactionType, LocalCodePtr), // the type of transaction, the return pointer.
REPL(REPLCodePtr, LocalCodePtr), // the REPL code, the return pointer.
@@ -320,7 +320,7 @@ impl CodePtr {
pub fn local(&self) -> LocalCodePtr {
match self {
&CodePtr::BuiltInClause(_, ref local)
| &CodePtr::CallN(_, ref local)
| &CodePtr::CallN(_, ref local, _)
| &CodePtr::Local(ref local) => local.clone(),
&CodePtr::VerifyAttrInterrupt(p) => LocalCodePtr::DirEntry(p),
&CodePtr::REPL(_, p) | &CodePtr::DynamicTransaction(_, p) => p,
@@ -418,7 +418,7 @@ impl Add<usize> for CodePtr {
| p @ CodePtr::VerifyAttrInterrupt(_)
| p @ CodePtr::DynamicTransaction(..) => p,
CodePtr::Local(local) => CodePtr::Local(local + rhs),
CodePtr::CallN(_, local) | CodePtr::BuiltInClause(_, local) => {
CodePtr::CallN(_, local, _) | CodePtr::BuiltInClause(_, local) => {
CodePtr::Local(local + rhs)
}
}

2
src/prolog/machine/machine_state.rs
View File

@@ -854,7 +854,7 @@ pub(crate) trait CallPolicy: Any {
return Ok(());
}
machine_st.p = CodePtr::CallN(arity, machine_st.p.local());
machine_st.p = CodePtr::CallN(arity, machine_st.p.local(), machine_st.last_call);
}
ClauseType::BuiltIn(built_in) => {
machine_st.setup_built_in_call(built_in.clone());