helper-functions.md
In rextendr: Call Rust Code from R using the 'extendr' Crate

`ui_throw()` called by `rust_function()` captures Rust compilation errors

Rust code could not be compiled successfully. Aborting.
x error[E0412]: cannot find type `i33` in this scope
 --> src\lib.rs:3:19
  |
3 | fn failed_fn(_x : i33, _y : i34, _z : i35) -> f100 { false }
  |                   ^^^ help: a builtin type with a similar name exists: `i32`
x error[E0412]: cannot find type `i34` in this scope
 --> src\lib.rs:3:29
  |
3 | fn failed_fn(_x : i33, _y : i34, _z : i35) -> f100 { false }
  |                             ^^^ help: a builtin type with a similar name exists: `i32`
x error[E0412]: cannot find type `i35` in this scope
 --> src\lib.rs:3:39
  |
3 | fn failed_fn(_x : i33, _y : i34, _z : i35) -> f100 { false }
  |                                       ^^^ help: a builtin type with a similar name exists: `i32`
x error[E0412]: cannot find type `f100` in this scope
 --> src\lib.rs:3:47
  |
3 | fn failed_fn(_x : i33, _y : i34, _z : i35) -> f100 { false }
  |                                               ^^^^ not found in this scope
x error: aborting due to 4 previous errors