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Change let

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nora 2023-07-29 17:03:38 +02:00
parent 40543b501c
commit 7c2faaecb8
9 changed files with 200 additions and 100 deletions
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20
src/ast.ts
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@ -54,15 +54,18 @@ export type ExprEmpty = { kind: "empty" };
export type ExprLet = {
kind: "let";
name: string;
name: Identifier;
type?: Type;
rhs: Expr;
after: Expr;
// IMPORTANT: This is (sadly) shared with ExprBlock.
local?: LocalInfo,
};
export type ExprBlock = {
kind: "block";
exprs: Expr[];
// IMPORTANT: This is (sadly) shared with ExprLet.
locals?: LocalInfo[];
};
export type ExprLiteral = {
@ -206,13 +209,15 @@ export type Type = TypeKind & {
ty?: Ty;
};
// name resolution stuff
export type Resolution =
| {
kind: "local";
/**
* The index of the local variable, from inside out.
* ```
* let a in let b in (a, b);
* let a = 0; let b; (a, b);
* ^ ^
* 1 0
* ```
@ -246,6 +251,14 @@ export const BUILTINS = [
export type BuiltinName = (typeof BUILTINS)[number];
export type LocalInfo = {
name: string;
span: Span;
ty?: Ty;
};
// types
export type TyString = {
kind: "string";
};
@ -397,7 +410,6 @@ export function superFoldExpr(expr: Expr, folder: Folder): Expr {
name: expr.name,
type: expr.type && folder.type(expr.type),
rhs: folder.expr(expr.rhs),
after: folder.expr(expr.after),
};
}
case "block": {