forked from M-Labs/nac3
nac3core: top level inferencer without type var should be ok
parent
a10ab81ee7
commit
526c18bda0
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@ -1,3 +1,7 @@
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use rustpython_parser::ast::fold::Fold;
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use crate::typecheck::type_inferencer::{FunctionData, Inferencer};
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use super::*;
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type DefAst = (Arc<RwLock<TopLevelDef>>, Option<ast::Stmt<()>>);
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@ -14,6 +18,8 @@ pub struct TopLevelComposer {
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pub defined_class_name: HashSet<String>,
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pub defined_class_method_name: HashSet<String>,
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pub defined_function_name: HashSet<String>,
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// get the class def id of a class method
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pub method_class: HashMap<DefinitionId, DefinitionId>,
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}
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impl Default for TopLevelComposer {
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@ -60,13 +66,14 @@ impl TopLevelComposer {
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defined_class_method_name: Default::default(),
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defined_class_name: Default::default(),
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defined_function_name: Default::default(),
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method_class: Default::default(),
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}
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}
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pub fn make_top_level_context(self) -> TopLevelContext {
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pub fn make_top_level_context(&self) -> TopLevelContext {
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TopLevelContext {
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definitions: RwLock::new(
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self.definition_ast_list.into_iter().map(|(x, ..)| x).collect_vec(),
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self.definition_ast_list.iter().map(|(x, ..)| x.clone()).collect_vec(),
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)
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.into(),
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// FIXME: all the big unifier or?
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@ -186,7 +193,8 @@ impl TopLevelComposer {
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for (name, _, id, ty, ..) in &class_method_name_def_ids {
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let mut class_def = class_def_ast.0.write();
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if let TopLevelDef::Class { methods, .. } = class_def.deref_mut() {
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methods.push((name.clone(), *ty, *id))
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methods.push((name.clone(), *ty, *id));
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self.method_class.insert(*id, DefinitionId(class_def_id));
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} else {
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unreachable!()
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}
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@ -240,11 +248,14 @@ impl TopLevelComposer {
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}
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}
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pub fn start_analysis(&mut self) -> Result<(), String> {
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pub fn start_analysis(&mut self, inference: bool) -> Result<(), String> {
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self.analyze_top_level_class_type_var()?;
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self.analyze_top_level_class_bases()?;
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self.analyze_top_level_class_fields_methods()?;
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self.analyze_top_level_function()?;
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if inference {
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self.analyze_function_instance()?;
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}
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Ok(())
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}
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@ -1096,4 +1107,162 @@ impl TopLevelComposer {
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Ok(())
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}
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/// step 5, analyze and call type inferecer to fill the `instance_to_stmt` of topleveldef::function
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fn analyze_function_instance(&mut self) -> Result<(), String> {
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for (id, (def, ast)) in self.definition_ast_list.iter().enumerate() {
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let mut function_def = def.write();
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if let TopLevelDef::Function {
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instance_to_stmt,
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name,
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signature,
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var_id,
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resolver,
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..
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} = &mut *function_def {
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if let TypeEnum::TFunc(func_sig) = self.unifier.get_ty(*signature).as_ref() {
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let FunSignature { args, ret, vars } = &*func_sig.borrow();
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// None if is not class method
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let self_type = {
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if let Some(class_id) = self.method_class.get(&DefinitionId(id)) {
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let class_def = self.definition_ast_list.get(class_id.0).unwrap();
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let class_def = class_def.0.read();
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if let TopLevelDef::Class { type_vars, .. } = &*class_def {
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let ty_ann = make_self_type_annotation(type_vars, *class_id);
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Some(get_type_from_type_annotation_kinds(
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self.extract_def_list().as_slice(),
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&mut self.unifier,
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&self.primitives_ty,
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&ty_ann
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)?)
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} else {
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unreachable!("must be class def")
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}
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} else {
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None
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}
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};
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let type_var_subst_comb = {
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let unifier = &mut self.unifier;
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let var_ids = vars
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.iter()
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.map(|(id, _)| *id);
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let var_combs = vars
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.iter()
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.map(|(_, ty)| unifier.get_instantiations(*ty).unwrap_or_else(|| vec![*ty]))
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.multi_cartesian_product()
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.collect_vec();
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let mut result: Vec<HashMap<u32, Type>> = Default::default();
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for comb in var_combs {
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result.push(var_ids.clone().zip(comb).collect());
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}
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// NOTE: if is empty, means no type var, append a empty subst, ok to do this?
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if result.is_empty() {
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result.push(HashMap::new())
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}
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result
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};
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for subst in type_var_subst_comb {
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// for each instance
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let unifier = &mut self.unifier;
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let inst_ret = unifier.subst(*ret, &subst).unwrap_or(*ret);
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let inst_args = args
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.iter()
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.map(|a| FuncArg {
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name: a.name.clone(),
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ty: unifier.subst(a.ty, &subst).unwrap_or(a.ty),
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default_value: a.default_value.clone()
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})
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.collect_vec();
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let self_type = self_type.map(|x| unifier.subst(x, &subst).unwrap_or(x));
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let mut identifiers = {
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// NOTE: none and function args?
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let mut result: HashSet<String> = HashSet::new();
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result.insert("None".into());
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if self_type.is_some(){
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result.insert("self".into());
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}
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result.extend(inst_args.iter().map(|x| x.name.clone()));
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result
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};
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let mut inferencer = {
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Inferencer {
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top_level: &self.make_top_level_context(),
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defined_identifiers: identifiers.clone(),
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function_data: &mut FunctionData {
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resolver: resolver.as_ref().unwrap().clone(),
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return_type: if self.unifier.unioned(inst_ret, self.primitives_ty.none) {
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None
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} else {
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Some(inst_ret)
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},
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// NOTE: allowed type vars: leave blank?
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bound_variables: Vec::new(),
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},
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unifier: &mut self.unifier,
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variable_mapping: {
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// NOTE: none and function args?
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let mut result: HashMap<String, Type> = HashMap::new();
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result.insert("None".into(), self.primitives_ty.none);
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if let Some(self_ty) = self_type {
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result.insert("self".into(), self_ty);
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}
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result.extend(inst_args.iter().map(|x| (x.name.clone(), x.ty)));
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result
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},
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primitives: &self.primitives_ty,
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virtual_checks: &mut Vec::new(),
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calls: &mut HashMap::new(),
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}
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};
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let fun_body = if let ast::StmtKind::FunctionDef { body, .. } = ast.clone().unwrap().node {
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body
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} else {
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unreachable!("must be function def ast")
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}
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.into_iter()
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.map(|b| inferencer.fold_stmt(b))
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.collect::<Result<Vec<_>, _>>()?;
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let returned = inferencer
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.check_block(fun_body.as_slice(), &mut identifiers)?;
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if !self.unifier.unioned(inst_ret, self.primitives_ty.none) && !returned {
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let ret_str = self.unifier.stringify(
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inst_ret,
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&mut |id| format!("class{}", id),
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&mut |id| format!("tvar{}", id)
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);
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return Err(format!(
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"expected return type of {} in function `{}`",
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ret_str,
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name
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));
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}
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instance_to_stmt.insert(
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// FIXME: how?
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"".to_string(),
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FunInstance {
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body: fun_body,
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unifier_id: 0,
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calls: HashMap::new(),
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subst
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}
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);
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}
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} else {
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unreachable!("must be typeenum::tfunc")
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}
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} else {
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continue
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}
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}
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Ok(())
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}
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}
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@ -36,7 +36,7 @@ pub struct FunInstance {
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pub unifier_id: usize,
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}
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#[derive(Debug)]
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#[derive(Debug, Clone)]
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pub enum TopLevelDef {
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Class {
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// name for error messages and symbols
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@ -138,7 +138,7 @@ fn test_simple_function_analyze(source: Vec<&str>, tys: Vec<&str>, names: Vec<&s
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internal_resolver.add_id_def(id, def_id);
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}
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composer.start_analysis().unwrap();
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composer.start_analysis(true).unwrap();
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for (i, (def, _)) in composer.definition_ast_list.iter().skip(5).enumerate() {
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let def = &*def.read();
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@ -802,7 +802,7 @@ fn test_analyze(source: Vec<&str>, res: Vec<&str>) {
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internal_resolver.add_id_def(id, def_id);
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}
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if let Err(msg) = composer.start_analysis() {
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if let Err(msg) = composer.start_analysis(false) {
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if print {
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println!("{}", msg);
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} else {
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@ -840,3 +840,103 @@ fn test_analyze(source: Vec<&str>, res: Vec<&str>) {
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}
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}
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}
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#[test_case(
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vec![
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indoc! {"
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def fun(a: int32, b: int32) -> int32:
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return a + b
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"}
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],
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vec![];
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"simple function"
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)]
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#[test_case(
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vec![
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indoc! {"
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class A:
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a: int32
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def __init__(self):
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self.a = 3
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def fun(self) -> int32:
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b = self.a + 3
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return b * self.a
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def dup(self) -> A:
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SELF = self
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return SELF
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"},
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indoc! {"
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def fun(a: A) -> int32:
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return a.fun()
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"}
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],
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vec![];
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"simple class body"
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)]
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fn test_inference(source: Vec<&str>, res: Vec<&str>) {
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let print = true;
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let mut composer = TopLevelComposer::new();
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let tvar_t = composer.unifier.get_fresh_var();
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let tvar_v = composer
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.unifier
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.get_fresh_var_with_range(&[composer.primitives_ty.bool, composer.primitives_ty.int32]);
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if print {
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println!("t: {}, {:?}", tvar_t.1, tvar_t.0);
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println!("v: {}, {:?}\n", tvar_v.1, tvar_v.0);
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}
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let internal_resolver = Arc::new(ResolverInternal {
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id_to_def: Default::default(),
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id_to_type: Mutex::new(
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vec![("T".to_string(), tvar_t.0), ("V".to_string(), tvar_v.0)].into_iter().collect(),
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),
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class_names: Default::default(),
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});
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let resolver = Arc::new(
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Box::new(Resolver(internal_resolver.clone())) as Box<dyn SymbolResolver + Send + Sync>
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);
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for s in source {
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let ast = parse_program(s).unwrap();
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let ast = ast[0].clone();
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let (id, def_id) = {
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match composer.register_top_level(ast, Some(resolver.clone()), "__main__".into()) {
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Ok(x) => x,
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Err(msg) => {
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if print {
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println!("{}", msg);
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} else {
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assert_eq!(res[0], msg);
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}
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return;
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}
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}
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};
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internal_resolver.add_id_def(id, def_id);
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}
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if let Err(msg) = composer.start_analysis(true) {
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if print {
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// println!("err2:");
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println!("{}", msg);
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} else {
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assert_eq!(res[0], msg);
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}
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} else {
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// skip 5 to skip primitives
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for (i, (def, _)) in composer.definition_ast_list.iter().skip(5).enumerate() {
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let def = &*def.read();
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if let TopLevelDef::Function { instance_to_stmt, .. } = def {
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for inst in instance_to_stmt.iter() {
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let ast = &inst.1.body;
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println!("{:?}", ast)
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}
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}
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}
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}
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}
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@ -237,7 +237,7 @@ pub fn get_type_from_type_annotation_kinds(
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let subst = {
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// check for compatible range
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// TODO: if allow type var to be applied, need more check
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// TODO: if allow type var to be applied(now this disallowed in the parse_to_type_annotation), need more check
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let mut result: HashMap<u32, Type> = HashMap::new();
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for (tvar, p) in type_vars.iter().zip(param_ty) {
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if let TypeEnum::TVar { id, range, meta: TypeVarMeta::Generic } =
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