forked from M-Labs/nac3
629 lines
24 KiB
Rust
629 lines
24 KiB
Rust
use std::convert::TryInto;
|
|
use std::fs::create_dir_all;
|
|
|
|
use crate::typecheck::context::InferenceContext;
|
|
use crate::typecheck::inference_core;
|
|
use crate::typecheck::magic_methods;
|
|
use crate::typecheck::typedef::{Type, TypeEnum};
|
|
use crate::typecheck::primitives;
|
|
use rustpython_parser::ast;
|
|
use rustpython_parser::ast::fold::Fold;
|
|
|
|
use super::inference_core::resolve_call;
|
|
|
|
pub struct ExpressionTypeInferencer<'a> {
|
|
pub ctx: InferenceContext<'a>
|
|
}
|
|
|
|
impl<'a> ExpressionTypeInferencer<'a> { // NOTE: add location here in the function parameter for better error message?
|
|
|
|
fn infer_constant_val(&self, constant: &ast::Constant) -> Result<Option<Type>, String> {
|
|
match constant {
|
|
ast::Constant::Bool(_) =>
|
|
Ok(Some(self.ctx.get_primitive(primitives::BOOL_TYPE))),
|
|
|
|
ast::Constant::Int(val) => {
|
|
let int32: Result<i32, _> = val.try_into();
|
|
let int64: Result<i64, _> = val.try_into();
|
|
|
|
if int32.is_ok() {
|
|
Ok(Some(self.ctx.get_primitive(primitives::INT32_TYPE)))
|
|
} else if int64.is_ok() {
|
|
Ok(Some(self.ctx.get_primitive(primitives::INT64_TYPE)))
|
|
} else {
|
|
Err("Integer out of bound".into())
|
|
}
|
|
},
|
|
|
|
ast::Constant::Float(_) =>
|
|
Ok(Some(self.ctx.get_primitive(primitives::FLOAT_TYPE))),
|
|
|
|
ast::Constant::Tuple(vals) => {
|
|
let result = vals
|
|
.into_iter()
|
|
.map(|x| self.infer_constant_val(x))
|
|
.collect::<Vec<_>>();
|
|
|
|
if result.iter().all(|x| x.is_ok()) {
|
|
Ok(Some(TypeEnum::ParametricType(
|
|
primitives::TUPLE_TYPE,
|
|
result
|
|
.into_iter()
|
|
.map(|x| x.unwrap().unwrap())
|
|
.collect::<Vec<_>>(),
|
|
).into()))
|
|
} else {
|
|
Err("Some elements in tuple cannot be typed".into())
|
|
}
|
|
}
|
|
|
|
_ => Err("not supported".into())
|
|
}
|
|
}
|
|
|
|
|
|
fn infer_list_val(&self, elts: &Vec<ast::Expr<Option<Type>>>) -> Result<Option<Type>, String> {
|
|
if elts.is_empty() {
|
|
Ok(Some(TypeEnum::ParametricType(primitives::LIST_TYPE, vec![TypeEnum::BotType.into()]).into()))
|
|
} else {
|
|
let types = elts
|
|
.iter()
|
|
.map(|x| &x.custom)
|
|
.collect::<Vec<_>>();
|
|
|
|
if types.iter().all(|x| x.is_some()) {
|
|
let head = types.iter().next().unwrap(); // here unwrap alone should be fine after the previous check
|
|
if types.iter().all(|x| x.eq(head)) {
|
|
Ok(Some(TypeEnum::ParametricType(primitives::LIST_TYPE, vec![(*head).clone().unwrap()]).into()))
|
|
} else {
|
|
Err("inhomogeneous list is not allowed".into())
|
|
}
|
|
} else {
|
|
Err("list elements must have some type".into())
|
|
}
|
|
}
|
|
}
|
|
|
|
fn infer_tuple_val(&self, elts: &Vec<ast::Expr<Option<Type>>>) -> Result<Option<Type>, String> {
|
|
let types = elts
|
|
.iter()
|
|
.map(|x| (x.custom).clone())
|
|
.collect::<Vec<_>>();
|
|
|
|
if types.iter().all(|x| x.is_some()) {
|
|
Ok(Some(TypeEnum::ParametricType(
|
|
primitives::TUPLE_TYPE,
|
|
types.into_iter().map(|x| x.unwrap()).collect()).into())) // unwrap alone should be fine after the previous check
|
|
} else {
|
|
Err("tuple elements must have some type".into())
|
|
}
|
|
}
|
|
|
|
fn infer_arrtibute(&self, value: &Box<ast::Expr<Option<Type>>>, attr: &str) -> Result<Option<Type>, String> {
|
|
let ty = value.custom.clone().ok_or_else(|| "no value".to_string())?;
|
|
if let TypeEnum::TypeVariable(id) = ty.as_ref() {
|
|
let v = self.ctx.get_variable_def(*id);
|
|
if v.bound.is_empty() {
|
|
return Err("no fields on unbounded type variable".into());
|
|
}
|
|
let ty = v.bound[0].get_base(&self.ctx).and_then(|v| v.fields.get(attr));
|
|
if ty.is_none() {
|
|
return Err("unknown field".into());
|
|
}
|
|
for x in v.bound[1..].iter() {
|
|
let ty1 = x.get_base(&self.ctx).and_then(|v| v.fields.get(attr));
|
|
if ty1 != ty {
|
|
return Err("unknown field (type mismatch between variants)".into());
|
|
}
|
|
}
|
|
return Ok(Some(ty.unwrap().clone()));
|
|
}
|
|
|
|
match ty.get_base(&self.ctx) {
|
|
Some(b) => match b.fields.get(attr) {
|
|
Some(t) => Ok(Some(t.clone())),
|
|
None => Err("no such field".into()),
|
|
},
|
|
None => Err("this object has no fields".into()),
|
|
}
|
|
}
|
|
|
|
fn infer_bool_ops(&self, values: &Vec<ast::Expr<Option<Type>>>) -> Result<Option<Type>, String> {
|
|
assert_eq!(values.len(), 2);
|
|
let left = values[0].custom.clone().ok_or_else(|| "no value".to_string())?;
|
|
let right = values[1].custom.clone().ok_or_else(|| "no value".to_string())?;
|
|
let b = self.ctx.get_primitive(primitives::BOOL_TYPE);
|
|
if left == b && right == b {
|
|
Ok(Some(b))
|
|
} else {
|
|
Err("bool operands must be bool".to_string())
|
|
}
|
|
}
|
|
|
|
fn _infer_bin_ops(&self, _left: &Box<ast::Expr<Option<Type>>>, _op: &ast::Operator, _right: &Box<ast::Expr<Option<Type>>>) -> Result<Option<Type>, String> {
|
|
Err("no need this function".into())
|
|
}
|
|
|
|
fn infer_unary_ops(&self, op: &ast::Unaryop, operand: &Box<ast::Expr<Option<Type>>>) -> Result<Option<Type>, String> {
|
|
if let ast::Unaryop::Not = op {
|
|
if (**operand).custom == Some(self.ctx.get_primitive(primitives::BOOL_TYPE)) {
|
|
Ok(Some(self.ctx.get_primitive(primitives::BOOL_TYPE)))
|
|
} else {
|
|
Err("logical not must be applied to bool".into())
|
|
}
|
|
} else {
|
|
inference_core::resolve_call(&self.ctx, (**operand).custom.clone(), magic_methods::unaryop_name(op), &[])
|
|
}
|
|
}
|
|
|
|
fn infer_compare(&self, left: &Box<ast::Expr<Option<Type>>>, ops: &Vec<ast::Cmpop>, comparators: &Vec<ast::Expr<Option<Type>>>) -> Result<Option<Type>, String> {
|
|
assert!(comparators.len() > 0);
|
|
if left.custom.is_none() || (!comparators.iter().all(|x| x.custom.is_some())) {
|
|
Err("comparison operands must have type".into())
|
|
} else {
|
|
let bool_type = Some(self.ctx.get_primitive(primitives::BOOL_TYPE));
|
|
let ty_first = resolve_call(
|
|
&self.ctx,
|
|
Some(left.custom.clone().ok_or_else(|| "comparator must be able to be typed".to_string())?.clone()),
|
|
magic_methods::comparison_name(&ops[0]).ok_or_else(|| "unsupported comparison".to_string())?,
|
|
&[comparators[0].custom.clone().ok_or_else(|| "comparator must be able to be typed".to_string())?])?;
|
|
if ty_first != bool_type {
|
|
return Err("comparison result must be boolean".into());
|
|
}
|
|
|
|
for ((a, b), op)
|
|
in comparators[..(comparators.len() - 1)]
|
|
.iter()
|
|
.zip(comparators[1..].iter())
|
|
.zip(ops[1..].iter()) {
|
|
let ty = resolve_call(
|
|
&self.ctx,
|
|
Some(a.custom.clone().ok_or_else(|| "comparator must be able to be typed".to_string())?.clone()),
|
|
magic_methods::comparison_name(op).ok_or_else(|| "unsupported comparison".to_string())?,
|
|
&[b.custom.clone().ok_or_else(|| "comparator must be able to be typed".to_string())?.clone()])?;
|
|
if ty != bool_type {
|
|
return Err("comparison result must be boolean".into());
|
|
}
|
|
}
|
|
Ok(bool_type)
|
|
}
|
|
}
|
|
|
|
fn infer_call(&self, func: &Box<ast::Expr<Option<Type>>>, args: &Vec<ast::Expr<Option<Type>>>, _keywords: &Vec<ast::Keyword<Option<Type>>>) -> Result<Option<Type>, String> {
|
|
if args.iter().all(|x| x.custom.is_some()) {
|
|
match &func.node {
|
|
ast::ExprKind::Name {id, ctx: _}
|
|
=> resolve_call(
|
|
&self.ctx,
|
|
None,
|
|
id,
|
|
&args.iter().map(|x| x.custom.clone().unwrap()).collect::<Vec<_>>()),
|
|
|
|
ast::ExprKind::Attribute {value, attr, ctx: _}
|
|
=> resolve_call(
|
|
&self.ctx,
|
|
Some(value.custom.clone().ok_or_else(|| "no value".to_string())?),
|
|
&attr,
|
|
&args.iter().map(|x| x.custom.clone().unwrap()).collect::<Vec<_>>()),
|
|
|
|
_ => Err("not supported".into())
|
|
}
|
|
} else {
|
|
Err("function params must have type".into())
|
|
}
|
|
}
|
|
|
|
fn infer_subscript(&self, value: &Box<ast::Expr<Option<Type>>>, slice: &Box<ast::Expr<Option<Type>>>) -> Result<Option<Type>, String> {
|
|
// let tt = value.custom.ok_or_else(|| "no value".to_string())?.as_ref();
|
|
|
|
let t = if let TypeEnum::ParametricType(primitives::LIST_TYPE, ls) = value.custom.as_ref().ok_or_else(|| "no value".to_string())?.as_ref() {
|
|
ls[0].clone()
|
|
} else {
|
|
return Err("subscript is not supported for types other than list".into());
|
|
};
|
|
|
|
if let ast::ExprKind::Slice {lower, upper, step} = &slice.node {
|
|
let int32_type = self.ctx.get_primitive(primitives::INT32_TYPE);
|
|
let l = lower.as_ref().map_or(
|
|
Ok(&int32_type),
|
|
|x| x.custom.as_ref().ok_or("lower bound cannot be typped".to_string()))?;
|
|
let u = upper.as_ref().map_or(
|
|
Ok(&int32_type),
|
|
|x| x.custom.as_ref().ok_or("upper bound cannot be typped".to_string()))?;
|
|
let s = step.as_ref().map_or(
|
|
Ok(&int32_type),
|
|
|x| x.custom.as_ref().ok_or("step cannot be typped".to_string()))?;
|
|
|
|
if l == &int32_type && u == &int32_type && s == &int32_type {
|
|
Ok(value.custom.clone())
|
|
} else {
|
|
Err("slice must be int32 type".into())
|
|
}
|
|
} else if slice.custom == Some(self.ctx.get_primitive(primitives::INT32_TYPE)) {
|
|
Ok(Some(t))
|
|
} else {
|
|
Err("slice or index must be int32 type".into())
|
|
}
|
|
}
|
|
|
|
fn infer_if_expr(&self, test: &Box<ast::Expr<Option<Type>>>, body: &Box<ast::Expr<Option<Type>>>, orelse: &Box<ast::Expr<Option<Type>>>) -> Result<Option<Type>, String> {
|
|
if test.custom != Some(self.ctx.get_primitive(primitives::BOOL_TYPE)) {
|
|
Err("test should be bool".into())
|
|
} else {
|
|
if body.custom == orelse.custom {
|
|
Ok(body.custom.clone())
|
|
} else {
|
|
Err("divergent type at if expression".into())
|
|
}
|
|
}
|
|
}
|
|
|
|
fn infer_list_comprehesion(&mut self, elt: &Box<ast::Expr<Option<Type>>>, generators: &Vec<ast::Comprehension<Option<Type>>>) -> Result<Option<Type>, String> {
|
|
if generators[0]
|
|
.ifs
|
|
.iter()
|
|
.all(|x| x.custom == Some(self.ctx.get_primitive(primitives::BOOL_TYPE))) {
|
|
Ok(Some(TypeEnum::ParametricType(
|
|
primitives::LIST_TYPE,
|
|
vec![elt.custom.clone().ok_or_else(|| "elements should have value".to_string())?]).into()))
|
|
} else {
|
|
Err("test must be bool".into())
|
|
}
|
|
}
|
|
|
|
fn fold_comprehension_first(&mut self, node: ast::Comprehension<Option<Type>>) -> Result<ast::Comprehension<Option<Type>>, String> {
|
|
Ok(ast::Comprehension {
|
|
target: node.target,
|
|
iter: Box::new(self.fold_expr(*node.iter)?),
|
|
ifs: node.ifs,
|
|
is_async: node.is_async
|
|
})
|
|
}
|
|
|
|
fn fold_comprehension_second(&mut self, node: ast::Comprehension<Option<Type>>) -> Result<ast::Comprehension<Option<Type>>, String> {
|
|
Ok(ast::Comprehension {
|
|
target: Box::new(self.fold_expr(*node.target)?),
|
|
iter: node.iter,
|
|
ifs: node
|
|
.ifs
|
|
.into_iter()
|
|
.map(|x| self.fold_expr(x))
|
|
.collect::<Result<Vec<_>, _>>()?,
|
|
is_async: node.is_async
|
|
})
|
|
}
|
|
|
|
fn infer_simple_binding(&mut self, name: &ast::Expr<Option<Type>>, ty: Type) -> Result<(), String> {
|
|
match &name.node {
|
|
ast::ExprKind::Name {id, ctx: _} => {
|
|
if id == "_" {
|
|
Ok(())
|
|
} else if self.ctx.defined(id) {
|
|
Err("duplicated naming".into())
|
|
} else {
|
|
self.ctx.assign(id.clone(), ty, name.location)?;
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
ast::ExprKind::Tuple {elts, ctx: _} => {
|
|
if let TypeEnum::ParametricType(primitives::TUPLE_TYPE, ls) = ty.as_ref() {
|
|
if elts.len() == ls.len() {
|
|
for (a, b) in elts.iter().zip(ls.iter()) {
|
|
self.infer_simple_binding(a, b.clone())?;
|
|
}
|
|
Ok(())
|
|
} else {
|
|
Err("different length".into())
|
|
}
|
|
} else {
|
|
Err("not supported".into())
|
|
}
|
|
}
|
|
_ => Err("not supported".into())
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
impl<'a> ast::fold::Fold<Option<Type>> for ExpressionTypeInferencer<'a> {
|
|
type TargetU = Option<Type>;
|
|
type Error = String;
|
|
|
|
fn map_user(&mut self, user: Option<Type>) -> Result<Self::TargetU, Self::Error> {
|
|
Ok(user)
|
|
}
|
|
|
|
fn fold_expr(&mut self, node: ast::Expr<Option<Type>>) -> Result<ast::Expr<Self::TargetU>, Self::Error> {
|
|
assert_eq!(node.custom, None); // NOTE: should pass
|
|
let mut expr = node;
|
|
|
|
if let ast::Expr {location, custom, node: ast::ExprKind::ListComp {elt, generators } } = expr {
|
|
// is list comprehension, only fold generators which does not include unknown identifiers introduced by list comprehension
|
|
if generators.len() != 1 {
|
|
return Err("only 1 generator statement is supported".into())
|
|
}
|
|
let generators_first_folded = generators
|
|
.into_iter()
|
|
.map(|x| self.fold_comprehension_first(x)).collect::<Result<Vec<_>, _>>()?;
|
|
|
|
let gen = &generators_first_folded[0];
|
|
let iter_type = gen.iter.custom.as_ref().ok_or("no value".to_string())?.as_ref();
|
|
|
|
if let TypeEnum::ParametricType(primitives::LIST_TYPE, ls) = iter_type {
|
|
self.ctx.stack.level += 1; // FIXME: how to use with_scope??
|
|
|
|
self.infer_simple_binding(&gen.target, ls[0].clone())?;
|
|
expr = ast::Expr {
|
|
location,
|
|
custom,
|
|
node: ast::ExprKind::ListComp {
|
|
elt: Box::new(self.fold_expr(*elt)?),
|
|
generators: generators_first_folded
|
|
.into_iter()
|
|
.map(|x| self.fold_comprehension_second(x))
|
|
.collect::<Result<Vec<_>, _>>()?
|
|
}
|
|
};
|
|
|
|
self.ctx.stack.level -= 1;
|
|
while !self.ctx.stack.sym_def.is_empty() {
|
|
let (_, level) = self.ctx.stack.sym_def.last().unwrap();
|
|
if *level > self.ctx.stack.level {
|
|
let (name, _) = self.ctx.stack.sym_def.pop().unwrap();
|
|
let (t, b, l) = self.ctx.sym_table.get_mut(&name).unwrap();
|
|
// set it to be unreadable
|
|
*b = false;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
return Err("iteration is supported for list only".into());
|
|
}
|
|
} else {
|
|
// if not listcomp which requires special handling, skip current level, make sure child nodes have their type
|
|
expr = ast::fold::fold_expr(self, expr)?;
|
|
}
|
|
|
|
match &expr.node {
|
|
ast::ExprKind::Constant {value, kind: _} =>
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: self.infer_constant_val(value)?,
|
|
node: expr.node
|
|
}),
|
|
|
|
ast::ExprKind::Name {id, ctx: _} =>
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: Some(self.ctx.resolve(id)?),
|
|
node: expr.node
|
|
}),
|
|
|
|
ast::ExprKind::List {elts, ctx: _} => {
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: self.infer_list_val(elts)?,
|
|
node: expr.node
|
|
})
|
|
}
|
|
|
|
ast::ExprKind::Tuple {elts, ctx: _} =>
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: self.infer_tuple_val(elts)?,
|
|
node: expr.node
|
|
}),
|
|
|
|
ast::ExprKind::Attribute {value, attr, ctx: _} =>
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: self.infer_arrtibute(value, attr)?,
|
|
node: expr.node
|
|
}),
|
|
|
|
ast::ExprKind::BoolOp {op: _, values} =>
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: self.infer_bool_ops(values)?,
|
|
node: expr.node
|
|
}),
|
|
|
|
ast::ExprKind::BinOp {left, op, right} =>
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: inference_core::resolve_call(
|
|
&self.ctx,
|
|
Some(left.custom.clone().ok_or_else(|| "no value".to_string())?),
|
|
magic_methods::binop_name(op),
|
|
&[right.custom.clone().ok_or_else(|| "no value".to_string())?])?,
|
|
node: expr.node
|
|
}),
|
|
|
|
ast::ExprKind::UnaryOp {op, operand} =>
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: self.infer_unary_ops(op, operand)?,
|
|
node: expr.node
|
|
}),
|
|
|
|
ast::ExprKind::Compare {left, ops, comparators} =>
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: self.infer_compare(left, ops, comparators)?,
|
|
node: expr.node
|
|
}),
|
|
|
|
ast::ExprKind::Call {func, args, keywords} =>
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: self.infer_call(func, args, keywords)?,
|
|
node: expr.node
|
|
}),
|
|
|
|
/* // REVIEW: add a new primitive type for slice and do type check of bounds here?
|
|
ast::ExprKind::Slice {lower, upper, step } =>
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: self.infer_slice(lower, upper, step)?,
|
|
node: expr.node
|
|
}), */
|
|
|
|
ast::ExprKind::Subscript {value, slice, ctx: _} =>
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: self.infer_subscript(value, slice)?,
|
|
node: expr.node
|
|
}),
|
|
|
|
ast::ExprKind::IfExp {test, body, orelse} =>
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: self.infer_if_expr(test, body, orelse)?,
|
|
node: expr.node
|
|
}),
|
|
|
|
ast::ExprKind::ListComp {elt, generators} => {
|
|
|
|
Ok(ast::Expr {
|
|
location: expr.location,
|
|
custom: self.infer_list_comprehesion(elt, generators)?,
|
|
node: expr.node
|
|
})
|
|
}
|
|
|
|
_ => { // not supported
|
|
Err("not supported yet".into())
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
pub mod test {
|
|
|
|
use crate::typecheck::{symbol_resolver::SymbolResolver, typedef::*, symbol_resolver::*, location::*};
|
|
use rustpython_parser::ast::{self, Expr, fold::Fold};
|
|
use super::*;
|
|
|
|
pub fn new_ctx<'a>() -> ExpressionTypeInferencer<'a>{
|
|
struct S;
|
|
|
|
impl SymbolResolver for S {
|
|
fn get_symbol_location(&self, _str: &str) -> Option<Location> {
|
|
None
|
|
}
|
|
|
|
fn get_symbol_type(&self, _str: &str) -> Option<SymbolType> {
|
|
None
|
|
}
|
|
|
|
fn get_symbol_value(&self, _str: &str) -> Option<SymbolValue> {
|
|
None
|
|
}
|
|
}
|
|
|
|
ExpressionTypeInferencer {
|
|
ctx: InferenceContext::new(primitives::basic_ctx(), Box::new(S{}), FileID(3)),
|
|
}
|
|
}
|
|
|
|
|
|
#[test]
|
|
fn test_i64() {
|
|
let mut inferencer = new_ctx();
|
|
|
|
let location = ast::Location::new(0, 0);
|
|
let num: i64 = 99999999999;
|
|
|
|
let ast: Expr<Option<Type>> = Expr {
|
|
location: location,
|
|
custom: None,
|
|
node: ast::ExprKind::Constant {
|
|
value: ast::Constant::Int(num.into()),
|
|
kind: None,
|
|
}
|
|
};
|
|
|
|
let new_ast = inferencer.fold_expr(ast).unwrap();
|
|
|
|
assert_eq!(
|
|
new_ast,
|
|
Expr {
|
|
location: location,
|
|
custom: Some(inferencer.ctx.get_primitive(primitives::INT64_TYPE)),
|
|
node: ast::ExprKind::Constant {
|
|
value: ast::Constant::Int(num.into()),
|
|
kind: None,
|
|
}
|
|
}
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_list() {
|
|
let mut inferencer = new_ctx();
|
|
let location = ast::Location::new(0, 0);
|
|
|
|
let ast: Expr<Option<Type>> = Expr {
|
|
location,
|
|
custom: None,
|
|
node: ast::ExprKind::List {
|
|
ctx: ast::ExprContext::Load,
|
|
elts: vec![
|
|
Expr {
|
|
location,
|
|
custom: None,
|
|
node: ast::ExprKind::Constant {
|
|
value: ast::Constant::Int(1.into()),
|
|
kind: None,
|
|
},
|
|
},
|
|
|
|
Expr {
|
|
location,
|
|
custom: None,
|
|
node: ast::ExprKind::Constant {
|
|
value: ast::Constant::Int(2.into()),
|
|
kind: None,
|
|
},
|
|
},
|
|
],
|
|
}
|
|
};
|
|
|
|
let new_ast = inferencer.fold_expr(ast).unwrap();
|
|
assert_eq!(
|
|
new_ast,
|
|
Expr {
|
|
location,
|
|
custom: Some(TypeEnum::ParametricType(primitives::LIST_TYPE, vec![inferencer.ctx.get_primitive(primitives::INT32_TYPE).into()]).into()),
|
|
node: ast::ExprKind::List {
|
|
ctx: ast::ExprContext::Load,
|
|
elts: vec![
|
|
Expr {
|
|
location,
|
|
custom: Some(inferencer.ctx.get_primitive(primitives::INT32_TYPE)),
|
|
node: ast::ExprKind::Constant {
|
|
value: ast::Constant::Int(1.into()),
|
|
kind: None,
|
|
},
|
|
},
|
|
|
|
Expr {
|
|
location,
|
|
custom: Some(inferencer.ctx.get_primitive(primitives::INT32_TYPE)),
|
|
node: ast::ExprKind::Constant {
|
|
value: ast::Constant::Int(2.into()),
|
|
kind: None,
|
|
},
|
|
},
|
|
],
|
|
}
|
|
}
|
|
);
|
|
}
|
|
|
|
}
|