rishi/scryer-prolog
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print line numbers to trace the location of parsing errors

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This commit is contained in:
Mark Thom
2019-09-17 22:50:32 -06:00
parent 9d2ac9e235
commit 40500ca2d6
4 changed files with 43 additions and 31 deletions
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53
src/prolog/machine/machine_errors.rs
View File

@@ -15,6 +15,7 @@ enum ErrorProvenance {
pub(super) struct MachineError {
stub: MachineStub,
location: Option<(usize, usize)>, // line_num, col_num
from: ErrorProvenance
}
@@ -26,14 +27,14 @@ impl MachineError {
pub(super) fn evaluation_error(eval_error: EvalError) -> Self {
let stub = functor!("evaluation_error", 1, [heap_atom!(eval_error.as_str())]);
MachineError { stub, from: ErrorProvenance::Received }
MachineError { stub, location: None, from: ErrorProvenance::Received }
}
pub(super) fn type_error(valid_type: ValidType, culprit: Addr) -> Self {
let stub = functor!("type_error", 2, [heap_atom!(valid_type.as_str()),
HeapCellValue::Addr(culprit)]);
MachineError { stub, from: ErrorProvenance::Received }
MachineError { stub, location: None, from: ErrorProvenance::Received }
}
pub(super)
@@ -49,23 +50,23 @@ impl MachineError {
SharedOpDesc::new(400, YFX)));
stub.append(&mut functor!(":", 2, [mod_name, name], SharedOpDesc::new(600, XFY)));
MachineError { stub, from: ErrorProvenance::Constructed }
MachineError { stub, location: None, from: ErrorProvenance::Constructed }
}
pub(super) fn existence_error(h: usize, err: ExistenceError) -> Self
{
{
match err {
ExistenceError::Procedure(name, arity) => {
let mut stub = functor!("existence_error", 2, [heap_atom!("procedure"), heap_str!(3 + h)]);
stub.append(&mut Self::functor_stub(name, arity));
MachineError { stub, from: ErrorProvenance::Constructed }
MachineError { stub, location: None, from: ErrorProvenance::Constructed }
},
ExistenceError::Module(name) => {
let name = HeapCellValue::Addr(Addr::Con(Constant::Atom(name, None)));
let mut stub = functor!("existence_error", 2, [heap_atom!("module"), name]);
let stub = functor!("existence_error", 2, [heap_atom!("module"), name]);
MachineError { stub, from: ErrorProvenance::Constructed }
MachineError { stub, location: None, from: ErrorProvenance::Constructed }
}
}
}
@@ -91,7 +92,7 @@ impl MachineError {
SessionError::OpIsInfixAndPostFix(op) =>
Self::permission_error(PermissionError::Create,
"operator",
op),
op),
_ => unreachable!()
}
}
@@ -106,7 +107,7 @@ impl MachineError {
stub.extend(err.into_iter());
MachineError { stub, from: ErrorProvenance::Constructed }
MachineError { stub, location: None, from: ErrorProvenance::Constructed }
}
fn arithmetic_error(h: usize, err: ArithmeticError) -> Self {
@@ -114,14 +115,14 @@ impl MachineError {
ArithmeticError::UninstantiatedVar =>
Self::instantiation_error(),
ArithmeticError::NonEvaluableFunctor(name, arity) => {
let name = HeapCellValue::Addr(Addr::Con(name));
let name = HeapCellValue::Addr(Addr::Con(name));
let culprit = functor!("/", 2, [name, heap_integer!(Integer::from(arity))],
SharedOpDesc::new(400, YFX));
let mut stub = Self::type_error(ValidType::Evaluable, Addr::HeapCell(3+h)).stub;
stub.extend(culprit.into_iter());
MachineError { stub, from: ErrorProvenance::Constructed }
MachineError { stub, location: None, from: ErrorProvenance::Constructed }
}
}
}
@@ -130,7 +131,8 @@ impl MachineError {
if let ParserError::Arithmetic(err) = err {
return Self::arithmetic_error(h, err);
}
let location = err.line_and_col_num();
let err = vec![heap_atom!(err.as_str())];
let mut stub = if err.len() == 1 {
@@ -141,23 +143,23 @@ impl MachineError {
stub.extend(err.into_iter());
MachineError { stub, from: ErrorProvenance::Constructed }
MachineError { stub, location, from: ErrorProvenance::Constructed }
}
pub(super) fn domain_error(error: DomainError, culprit: Addr) -> Self {
let stub = functor!("domain_error", 2, [heap_atom!(error.as_str()),
HeapCellValue::Addr(culprit)]);
MachineError { stub, from: ErrorProvenance::Received }
MachineError { stub, location: None, from: ErrorProvenance::Received }
}
pub(super) fn instantiation_error() -> Self {
let stub = functor!("instantiation_error");
MachineError { stub, from: ErrorProvenance::Received }
MachineError { stub, location: None, from: ErrorProvenance::Received }
}
pub(super) fn representation_error(flag: RepFlag) -> Self {
let stub = functor!("representation_error", 1, [heap_atom!(flag.as_str())]);
MachineError { stub, from: ErrorProvenance::Received }
MachineError { stub, location: None, from: ErrorProvenance::Received }
}
fn into_iter(self, offset: usize) -> Box<Iterator<Item=HeapCellValue>> {
@@ -382,14 +384,25 @@ impl MachineState {
}
pub(super) fn error_form(&self, err: MachineError, src: MachineStub) -> MachineStub {
let location = err.location;
let err_len = err.len();
let h = self.heap.h;
let mut stub = vec![HeapCellValue::NamedStr(2, clause_name!("error"), None),
HeapCellValue::Addr(Addr::HeapCell(h + 3)),
HeapCellValue::Addr(Addr::HeapCell(h + 3 + err.len()))];
HeapCellValue::Addr(Addr::HeapCell(h + 3 + err_len))];
stub.extend(err.into_iter(3));
stub.extend(src.into_iter());
if let Some((line_num, _)) = location {
let colon_op_desc = Some(SharedOpDesc::new(600, XFY));
stub.extend(vec![HeapCellValue::NamedStr(2, clause_name!(":"), colon_op_desc),
HeapCellValue::Addr(Addr::HeapCell(h + 6 + err_len)),
heap_integer!(Integer::from(line_num))].into_iter());
}
stub.extend(src.into_iter());
stub
}
@@ -417,7 +430,7 @@ pub enum SessionError {
CannotOverwriteBuiltIn(ClauseName),
CannotOverwriteImport(ClauseName),
InvalidFileName(ClauseName),
ModuleDoesNotContainExport,
ModuleDoesNotContainExport,
ModuleNotFound,
NamelessEntry,
NoModuleDeclaration(ClauseName),

13
src/prolog/machine/system_calls.rs
View File

@@ -339,7 +339,10 @@ impl MachineState {
if let Some(c) = string.chars().last() {
if layout_char!(c) {
let err = ParserError::UnexpectedChar(c);
let (line_num, col_num) = string.chars().fold((0, 0), |(line_num, col_num), c|
if new_line_char!(c) { (1 + line_num, 0) } else { (line_num, col_num + 1) }
);
let err = ParserError::UnexpectedChar(c, line_num, col_num);
let h = self.heap.h;
let err = MachineError::syntax_error(h, err);
@@ -370,7 +373,7 @@ impl MachineState {
Ok(Term::Constant(_, Constant::CharCode(c))) =>
self.unify(nx, Addr::Con(Constant::CharCode(c))),
_ => {
let err = ParserError::ParseBigInt;
let err = ParserError::ParseBigInt(0, 0);
let h = self.heap.h;
let err = MachineError::syntax_error(h, err);
@@ -873,17 +876,17 @@ impl MachineState {
| addr @ Addr::StackCell(..)
| addr @ Addr::AttrVar(_) => {
let mut iter = indices.code_dir.iter();
while let Some(((name, arity), _)) = iter.next() {
if is_builtin_predicate(&name) {
continue;
}
let spec = get_clause_spec(name.clone(), *arity,
composite_op!(&indices.op_dir));
let db_ref = DBRef::NamedPred(name.clone(), *arity, spec);
let r = addr.as_var().unwrap();
self.bind(r, Addr::DBRef(db_ref));
return return_from_clause!(self.last_call, self);
}