---
source: crates/tinymist-query/src/hover.rs
expression: content
input_file: crates/tinymist-query/src/fixtures/hover/render_equation.typ
---
Range: 12:20:12:23

```typc
let lam(
  A: type,
  B: type,
) = dictionary;
```


======


Lambda constructor.

Typing Rule:

<p align="center"><img alt="typst-block" src="data:image-hash/svg+xml;base64,redacted" /></p>

# Positional Parameters

## A

```typc
type: type
```

The type of the argument.
  - It can be also regarded as the condition of the proposition.

## B (positional)

```typc
type: type
```

The type of the body.
  - It can be also regarded as the conclusion of the proposition.
