skeleton done

This commit is contained in:
pca006132 2021-07-19 17:26:51 +08:00
parent eb4b2bb7f6
commit 016166de46
1 changed files with 56 additions and 4 deletions

View File

@ -8,7 +8,7 @@ use super::magic_methods::*;
use super::symbol_resolver::{SymbolResolver, SymbolType};
use super::typedef::{Call, Type, TypeEnum, Unifier};
use itertools::izip;
use rustpython_parser::ast::{self, fold::Fold};
use rustpython_parser::ast::{self, fold};
pub struct PrimitiveStore {
int32: Type,
@ -26,13 +26,65 @@ pub struct Inferencer<'a> {
primitives: &'a PrimitiveStore,
}
impl<'a> Fold<()> for Inferencer<'a> {
impl<'a> fold::Fold<()> for Inferencer<'a> {
type TargetU = Option<Type>;
type Error = String;
fn map_user(&mut self, _: ()) -> Result<Self::TargetU, Self::Error> {
Ok(None)
}
fn fold_expr(&mut self, node: ast::Expr<()>) -> Result<ast::Expr<Self::TargetU>, Self::Error> {
let expr = match &node.node {
ast::ExprKind::Call { .. } => unimplemented!(),
ast::ExprKind::Lambda { .. } => unimplemented!(),
ast::ExprKind::ListComp { .. } => unimplemented!(),
_ => fold::fold_expr(self, node)?,
};
let custom = match &expr.node {
ast::ExprKind::Constant { value, .. } => Some(self.infer_constant(value)?),
ast::ExprKind::Name { id, .. } => Some(self.infer_identifier(id)?),
ast::ExprKind::List { elts, .. } => Some(self.infer_list(elts)?),
ast::ExprKind::Tuple { elts, .. } => Some(self.infer_tuple(elts)?),
ast::ExprKind::Attribute {
value,
attr,
ctx: _,
} => Some(self.infer_attribute(value, attr)?),
ast::ExprKind::BoolOp { op: _, values } => Some(self.infer_bool_ops(values)?),
ast::ExprKind::BinOp { left, op, right } => Some(self.infer_bin_ops(left, op, right)?),
ast::ExprKind::UnaryOp { op, operand } => Some(self.infer_unary_ops(op, operand)?),
ast::ExprKind::Compare {
left,
ops,
comparators,
} => Some(self.infer_compare(left, ops, comparators)?),
ast::ExprKind::Call {
func,
args,
keywords,
} => unimplemented!(),
ast::ExprKind::Subscript {
value,
slice,
ctx: _,
} => Some(self.infer_subscript(value.as_ref(), slice.as_ref())?),
ast::ExprKind::IfExp { test, body, orelse } => {
Some(self.infer_if_expr(test, body.as_ref(), orelse.as_ref())?)
}
ast::ExprKind::ListComp {
elt: _,
generators: _,
} => expr.custom, // already computed
ast::ExprKind::Slice { .. } => None, // we don't need it for slice
_ => return Err("not supported yet".into()),
};
Ok(ast::Expr {
custom,
location: expr.location,
node: expr.node,
})
}
}
type InferenceResult = Result<Type, String>;
@ -219,8 +271,8 @@ impl<'a> Inferencer<'a> {
fn infer_if_expr(
&mut self,
test: &ast::Expr<Option<Type>>,
body: ast::Expr<Option<Type>>,
orelse: ast::Expr<Option<Type>>,
body: &ast::Expr<Option<Type>>,
orelse: &ast::Expr<Option<Type>>,
) -> InferenceResult {
self.constrain(test.custom.unwrap(), self.primitives.bool)?;
let ty = self.unifier.get_fresh_var().0;