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rust: Add start of syntax experimentation #14

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rust: Add start of syntax experimentation
CohenArthur Sep 22, 2023
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rust-function-ffi: Rename writeup
CohenArthur Oct 6, 2023
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20 changes: 20 additions & 0 deletions docs/writeups/0013-calling-rust-functions.md
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# WU0013: Calling Rust functions

## Syntax experimentation

```rust
fn foo() -> i32 { 15 }
fn bar(a: i32, c: i32) -> i32 { a + c }
```

```rust
where rust = source("rust");
where i32 = rust.i32;
where Fn = rust.Fn;

where foo_type = rust.fn("foo", return_type: i32).build();
where bar_type = rust.fn("bar", args: (i32, i32), return_type: i32).build();

where foo_type = Fn[(), i32](name: "foo");
where bar_type = Fn[(i32, i32), i32](name: "bar");
```