nac3/nac3core/src/toplevel/helper.rs

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use std::convert::TryInto;
use crate::symbol_resolver::SymbolValue;
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use nac3parser::ast::{Constant, Location};
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use super::*;
impl TopLevelDef {
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pub fn to_string(&self, unifier: &mut Unifier) -> String {
match self {
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TopLevelDef::Class { name, ancestors, fields, methods, type_vars, .. } => {
let fields_str = fields
.iter()
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.map(|(n, ty, _)| (n.to_string(), unifier.stringify(*ty)))
.collect_vec();
let methods_str = methods
.iter()
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.map(|(n, ty, id)| (n.to_string(), unifier.stringify(*ty), *id))
.collect_vec();
format!(
"Class {{\nname: {:?},\nancestors: {:?},\nfields: {:?},\nmethods: {:?},\ntype_vars: {:?}\n}}",
name,
ancestors.iter().map(|ancestor| ancestor.stringify(unifier)).collect_vec(),
fields_str.iter().map(|(a, _)| a).collect_vec(),
methods_str.iter().map(|(a, b, _)| (a, b)).collect_vec(),
type_vars.iter().map(|id| unifier.stringify(*id)).collect_vec(),
)
}
TopLevelDef::Function { name, signature, var_id, .. } => format!(
"Function {{\nname: {:?},\nsig: {:?},\nvar_id: {:?}\n}}",
name,
unifier.stringify(*signature),
{
// preserve the order for debug output and test
let mut r = var_id.clone();
r.sort_unstable();
r
}
),
}
}
}
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impl TopLevelComposer {
pub fn make_primitives() -> (PrimitiveStore, Unifier) {
let mut unifier = Unifier::new();
let int32 = unifier.add_ty(TypeEnum::TObj {
obj_id: DefinitionId(0),
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fields: HashMap::new(),
params: HashMap::new(),
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});
let int64 = unifier.add_ty(TypeEnum::TObj {
obj_id: DefinitionId(1),
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fields: HashMap::new(),
params: HashMap::new(),
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});
let float = unifier.add_ty(TypeEnum::TObj {
obj_id: DefinitionId(2),
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fields: HashMap::new(),
params: HashMap::new(),
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});
let bool = unifier.add_ty(TypeEnum::TObj {
obj_id: DefinitionId(3),
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fields: HashMap::new(),
params: HashMap::new(),
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});
let none = unifier.add_ty(TypeEnum::TObj {
obj_id: DefinitionId(4),
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fields: HashMap::new(),
params: HashMap::new(),
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});
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let range = unifier.add_ty(TypeEnum::TObj {
obj_id: DefinitionId(5),
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fields: HashMap::new(),
params: HashMap::new(),
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});
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let str = unifier.add_ty(TypeEnum::TObj {
obj_id: DefinitionId(6),
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fields: HashMap::new(),
params: HashMap::new(),
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});
let exception = unifier.add_ty(TypeEnum::TObj {
obj_id: DefinitionId(7),
fields: vec![
("__name__".into(), (int32, true)),
("__file__".into(), (int32, true)),
("__line__".into(), (int32, true)),
("__col__".into(), (int32, true)),
("__func__".into(), (str, true)),
("__message__".into(), (str, true)),
("__param0__".into(), (int64, true)),
("__param1__".into(), (int64, true)),
("__param2__".into(), (int64, true)),
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]
.into_iter()
.collect::<HashMap<_, _>>(),
params: HashMap::new(),
});
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let uint32 = unifier.add_ty(TypeEnum::TObj {
obj_id: DefinitionId(8),
fields: HashMap::new(),
params: HashMap::new(),
});
let uint64 = unifier.add_ty(TypeEnum::TObj {
obj_id: DefinitionId(9),
fields: HashMap::new(),
params: HashMap::new(),
});
let option_type_var = unifier.get_fresh_var(Some("option_type_var".into()), None);
let is_some_type_fun_ty = unifier.add_ty(TypeEnum::TFunc(FunSignature {
args: vec![],
ret: bool,
vars: HashMap::from([(option_type_var.1, option_type_var.0)]),
}));
let unwrap_fun_ty = unifier.add_ty(TypeEnum::TFunc(FunSignature {
args: vec![],
ret: option_type_var.0,
vars: HashMap::from([(option_type_var.1, option_type_var.0)]),
}));
let option = unifier.add_ty(TypeEnum::TObj {
obj_id: DefinitionId(10),
fields: vec![
("is_some".into(), (is_some_type_fun_ty, true)),
("is_none".into(), (is_some_type_fun_ty, true)),
("unwrap".into(), (unwrap_fun_ty, true)),
]
.into_iter()
.collect::<HashMap<_, _>>(),
params: HashMap::from([(option_type_var.1, option_type_var.0)]),
});
let primitives = PrimitiveStore {
int32,
int64,
float,
bool,
none,
range,
str,
exception,
uint32,
uint64,
option,
};
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crate::typecheck::magic_methods::set_primitives_magic_methods(&primitives, &mut unifier);
(primitives, unifier)
}
/// already include the definition_id of itself inside the ancestors vector
/// when first regitering, the type_vars, fields, methods, ancestors are invalid
pub fn make_top_level_class_def(
index: usize,
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resolver: Option<Arc<dyn SymbolResolver + Send + Sync>>,
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name: StrRef,
constructor: Option<Type>,
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loc: Option<Location>,
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) -> TopLevelDef {
TopLevelDef::Class {
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name,
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object_id: DefinitionId(index),
type_vars: Default::default(),
fields: Default::default(),
methods: Default::default(),
ancestors: Default::default(),
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constructor,
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resolver,
loc,
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}
}
/// when first registering, the type is a invalid value
pub fn make_top_level_function_def(
name: String,
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simple_name: StrRef,
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ty: Type,
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resolver: Option<Arc<dyn SymbolResolver + Send + Sync>>,
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loc: Option<Location>,
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) -> TopLevelDef {
TopLevelDef::Function {
name,
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simple_name,
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signature: ty,
var_id: Default::default(),
instance_to_symbol: Default::default(),
instance_to_stmt: Default::default(),
resolver,
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codegen_callback: None,
loc,
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}
}
pub fn make_class_method_name(mut class_name: String, method_name: &str) -> String {
class_name.push('.');
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class_name.push_str(method_name);
class_name
}
pub fn get_class_method_def_info(
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class_methods_def: &[(StrRef, Type, DefinitionId)],
method_name: StrRef,
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) -> Result<(Type, DefinitionId), String> {
for (name, ty, def_id) in class_methods_def {
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if name == &method_name {
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return Ok((*ty, *def_id));
}
}
Err(format!("no method {} in the current class", method_name))
}
/// get all base class def id of a class, excluding itself. \
/// this function should called only after the direct parent is set
/// and before all the ancestors are set
/// and when we allow single inheritance \
/// the order of the returned list is from the child to the deepest ancestor
pub fn get_all_ancestors_helper(
child: &TypeAnnotation,
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temp_def_list: &[Arc<RwLock<TopLevelDef>>],
) -> Result<Vec<TypeAnnotation>, String> {
let mut result: Vec<TypeAnnotation> = Vec::new();
let mut parent = Self::get_parent(child, temp_def_list);
while let Some(p) = parent {
parent = Self::get_parent(&p, temp_def_list);
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let p_id = if let TypeAnnotation::CustomClass { id, .. } = &p {
*id
} else {
unreachable!("must be class kind annotation")
};
// check cycle
let no_cycle = result.iter().all(|x| {
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if let TypeAnnotation::CustomClass { id, .. } = x {
id.0 != p_id.0
} else {
unreachable!("must be class kind annotation")
}
});
if no_cycle {
result.push(p);
} else {
return Err("cyclic inheritance detected".into());
}
}
Ok(result)
}
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/// should only be called when finding all ancestors, so panic when wrong
fn get_parent(
child: &TypeAnnotation,
temp_def_list: &[Arc<RwLock<TopLevelDef>>],
) -> Option<TypeAnnotation> {
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let child_id = if let TypeAnnotation::CustomClass { id, .. } = child {
*id
} else {
unreachable!("should be class type annotation")
};
let child_def = temp_def_list.get(child_id.0).unwrap();
let child_def = child_def.read();
if let TopLevelDef::Class { ancestors, .. } = &*child_def {
if !ancestors.is_empty() {
Some(ancestors[0].clone())
} else {
None
}
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} else {
unreachable!("child must be top level class def")
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}
}
/// get the var_id of a given TVar type
pub fn get_var_id(var_ty: Type, unifier: &mut Unifier) -> Result<u32, String> {
if let TypeEnum::TVar { id, .. } = unifier.get_ty(var_ty).as_ref() {
Ok(*id)
} else {
Err("not type var".to_string())
}
}
pub fn check_overload_function_type(
this: Type,
other: Type,
unifier: &mut Unifier,
type_var_to_concrete_def: &HashMap<Type, TypeAnnotation>,
) -> bool {
let this = unifier.get_ty(this);
let this = this.as_ref();
let other = unifier.get_ty(other);
let other = other.as_ref();
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if let (
TypeEnum::TFunc(FunSignature { args: this_args, ret: this_ret, .. }),
TypeEnum::TFunc(FunSignature { args: other_args, ret: other_ret, .. }),
) = (this, other)
{
// check args
let args_ok = this_args
.iter()
.map(|FuncArg { name, ty, .. }| (name, type_var_to_concrete_def.get(ty).unwrap()))
.zip(other_args.iter().map(|FuncArg { name, ty, .. }| {
(name, type_var_to_concrete_def.get(ty).unwrap())
}))
.all(|(this, other)| {
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if this.0 == &"self".into() && this.0 == other.0 {
true
} else {
this.0 == other.0
&& check_overload_type_annotation_compatible(this.1, other.1, unifier)
}
});
// check rets
let ret_ok = check_overload_type_annotation_compatible(
type_var_to_concrete_def.get(this_ret).unwrap(),
type_var_to_concrete_def.get(other_ret).unwrap(),
unifier,
);
// return
args_ok && ret_ok
} else {
unreachable!("this function must be called with function type")
}
}
pub fn check_overload_field_type(
this: Type,
other: Type,
unifier: &mut Unifier,
type_var_to_concrete_def: &HashMap<Type, TypeAnnotation>,
) -> bool {
check_overload_type_annotation_compatible(
type_var_to_concrete_def.get(&this).unwrap(),
type_var_to_concrete_def.get(&other).unwrap(),
unifier,
)
}
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pub fn get_all_assigned_field(stmts: &[ast::Stmt<()>]) -> Result<HashSet<StrRef>, String> {
let mut result = HashSet::new();
for s in stmts {
match &s.node {
ast::StmtKind::AnnAssign { target, .. }
if {
if let ast::ExprKind::Attribute { value, .. } = &target.node {
if let ast::ExprKind::Name { id, .. } = &value.node {
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id == &"self".into()
} else {
false
}
} else {
false
}
} =>
{
return Err(format!(
"redundant type annotation for class fields at {}",
s.location
))
}
ast::StmtKind::Assign { targets, .. } => {
for t in targets {
if let ast::ExprKind::Attribute { value, attr, .. } = &t.node {
if let ast::ExprKind::Name { id, .. } = &value.node {
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if id == &"self".into() {
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result.insert(*attr);
}
}
}
}
}
// TODO: do not check for For and While?
ast::StmtKind::For { body, orelse, .. }
| ast::StmtKind::While { body, orelse, .. } => {
result.extend(Self::get_all_assigned_field(body.as_slice())?);
result.extend(Self::get_all_assigned_field(orelse.as_slice())?);
}
ast::StmtKind::If { body, orelse, .. } => {
let inited_for_sure = Self::get_all_assigned_field(body.as_slice())?
.intersection(&Self::get_all_assigned_field(orelse.as_slice())?)
.cloned()
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.collect::<HashSet<_>>();
result.extend(inited_for_sure);
}
ast::StmtKind::Try { body, orelse, finalbody, .. } => {
let inited_for_sure = Self::get_all_assigned_field(body.as_slice())?
.intersection(&Self::get_all_assigned_field(orelse.as_slice())?)
.cloned()
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.collect::<HashSet<_>>();
result.extend(inited_for_sure);
result.extend(Self::get_all_assigned_field(finalbody.as_slice())?);
}
ast::StmtKind::With { body, .. } => {
result.extend(Self::get_all_assigned_field(body.as_slice())?);
}
ast::StmtKind::Pass { .. } => {}
ast::StmtKind::Assert { .. } => {}
ast::StmtKind::Expr { .. } => {}
_ => {
unimplemented!()
}
}
}
Ok(result)
}
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pub fn parse_parameter_default_value(
default: &ast::Expr,
resolver: &(dyn SymbolResolver + Send + Sync),
) -> Result<SymbolValue, String> {
parse_parameter_default_value(default, resolver)
}
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pub fn check_default_param_type(
val: &SymbolValue,
ty: &TypeAnnotation,
primitive: &PrimitiveStore,
unifier: &mut Unifier,
) -> Result<(), String> {
fn type_default_param(
val: &SymbolValue,
primitive: &PrimitiveStore,
unifier: &mut Unifier,
) -> TypeAnnotation {
match val {
SymbolValue::Bool(..) => TypeAnnotation::Primitive(primitive.bool),
SymbolValue::Double(..) => TypeAnnotation::Primitive(primitive.float),
SymbolValue::I32(..) => TypeAnnotation::Primitive(primitive.int32),
SymbolValue::I64(..) => TypeAnnotation::Primitive(primitive.int64),
SymbolValue::U32(..) => TypeAnnotation::Primitive(primitive.uint32),
SymbolValue::U64(..) => TypeAnnotation::Primitive(primitive.uint64),
SymbolValue::Str(..) => TypeAnnotation::Primitive(primitive.str),
SymbolValue::Tuple(vs) => {
let vs_tys = vs
.iter()
.map(|v| type_default_param(v, primitive, unifier))
.collect::<Vec<_>>();
TypeAnnotation::Tuple(vs_tys)
}
SymbolValue::OptionNone => TypeAnnotation::CustomClass {
id: primitive.option.get_obj_id(unifier),
params: Default::default(),
},
SymbolValue::OptionSome(v) => {
let ty = type_default_param(v, primitive, unifier);
TypeAnnotation::CustomClass {
id: primitive.option.get_obj_id(unifier),
params: vec![ty],
}
}
}
}
fn is_compatible(
found: &TypeAnnotation,
expect: &TypeAnnotation,
unifier: &mut Unifier,
primitive: &PrimitiveStore,
) -> bool {
match (found, expect) {
(TypeAnnotation::Primitive(f), TypeAnnotation::Primitive(e)) => {
unifier.unioned(*f, *e)
}
(
TypeAnnotation::CustomClass { id: f_id, params: f_param },
TypeAnnotation::CustomClass { id: e_id, params: e_param },
) => {
*f_id == *e_id
&& *f_id == primitive.option.get_obj_id(unifier)
&& (f_param.is_empty()
|| (f_param.len() == 1
&& e_param.len() == 1
&& is_compatible(&f_param[0], &e_param[0], unifier, primitive)))
}
(TypeAnnotation::Tuple(f), TypeAnnotation::Tuple(e)) => {
f.len() == e.len()
&& f.iter()
.zip(e.iter())
.all(|(f, e)| is_compatible(f, e, unifier, primitive))
}
_ => false,
}
}
let found = type_default_param(val, primitive, unifier);
if !is_compatible(&found, ty, unifier, primitive) {
Err(format!(
"incompatible default parameter type, expect {}, found {}",
ty.stringify(unifier),
found.stringify(unifier),
))
} else {
Ok(())
}
}
}
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pub fn parse_parameter_default_value(
default: &ast::Expr,
resolver: &(dyn SymbolResolver + Send + Sync),
) -> Result<SymbolValue, String> {
fn handle_constant(val: &Constant, loc: &Location) -> Result<SymbolValue, String> {
match val {
Constant::Int(v) => {
if let Ok(v) = (*v).try_into() {
Ok(SymbolValue::I32(v))
} else {
Err(format!("integer value out of range at {}", loc))
}
}
Constant::Float(v) => Ok(SymbolValue::Double(*v)),
Constant::Bool(v) => Ok(SymbolValue::Bool(*v)),
Constant::Tuple(tuple) => Ok(SymbolValue::Tuple(
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tuple.iter().map(|x| handle_constant(x, loc)).collect::<Result<Vec<_>, _>>()?,
)),
Constant::None => Err(format!(
"`None` is not supported, use `none` for option type instead ({})",
loc
)),
_ => unimplemented!("this constant is not supported at {}", loc),
}
}
match &default.node {
ast::ExprKind::Constant { value, .. } => handle_constant(value, &default.location),
ast::ExprKind::Call { func, args, .. } if args.len() == 1 => {
match &func.node {
ast::ExprKind::Name { id, .. } if *id == "int64".into() => match &args[0].node {
ast::ExprKind::Constant { value: Constant::Int(v), .. } => {
let v: Result<i64, _> = (*v).try_into();
match v {
Ok(v) => Ok(SymbolValue::I64(v)),
_ => Err(format!("default param value out of range at {}", default.location)),
}
}
_ => Err(format!("only allow constant integer here at {}", default.location))
}
ast::ExprKind::Name { id, .. } if *id == "uint32".into() => match &args[0].node {
ast::ExprKind::Constant { value: Constant::Int(v), .. } => {
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let v: Result<u32, _> = (*v).try_into();
match v {
Ok(v) => Ok(SymbolValue::U32(v)),
_ => Err(format!("default param value out of range at {}", default.location)),
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}
}
_ => Err(format!("only allow constant integer here at {}", default.location))
}
ast::ExprKind::Name { id, .. } if *id == "uint64".into() => match &args[0].node {
ast::ExprKind::Constant { value: Constant::Int(v), .. } => {
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let v: Result<u64, _> = (*v).try_into();
match v {
Ok(v) => Ok(SymbolValue::U64(v)),
_ => Err(format!("default param value out of range at {}", default.location)),
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}
}
_ => Err(format!("only allow constant integer here at {}", default.location))
}
ast::ExprKind::Name { id, .. } if *id == "Some".into() => Ok(
SymbolValue::OptionSome(
Box::new(parse_parameter_default_value(&args[0], resolver)?)
)
),
_ => Err(format!("unsupported default parameter at {}", default.location)),
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}
}
ast::ExprKind::Tuple { elts, .. } => Ok(SymbolValue::Tuple(elts
.iter()
.map(|x| parse_parameter_default_value(x, resolver))
.collect::<Result<Vec<_>, _>>()?
)),
ast::ExprKind::Name { id, .. } if id == &"none".into() => Ok(SymbolValue::OptionNone),
ast::ExprKind::Name { id, .. } => {
resolver.get_default_param_value(default).ok_or_else(
|| format!(
"`{}` cannot be used as a default parameter at {} \
(not primitive type, option or tuple / not defined?)",
id,
default.location
)
)
}
_ => Err(format!(
"unsupported default parameter (not primitive type, option or tuple) at {}",
default.location
))
}
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}