Cucumber Expression Parsing Error for Float Type

[jcsho]

Setup

Feature

Scenario: A tuple with w=0 is a vector
  Given a ← tuple(4.3, -4.2, 3.1, 0.0)

Code

#[given(expr = "a ← tuple\\({float}, {float}, {float}, {float})")]
fn setup_tuple(world: &mut TupleWorld, x: f64, y: f64, z: f64, w: f64) {
  ...
}

Error

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Regex(Syntax(
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
regex parse error:
    ^a ← tuple\(((?=.*\d.*)[-+]?\d*(?:\.(?=\d.*))?\d*(?:\d+[E][+-]?\d+)?), ((?=.*\d.*)[-+]?\d*(?:\.(?=\d.*))?\d*(?:\d+[E][+-]?\d+)?), ((?=.*\d.*)[-+]?\d*(?:\.(?=\d.*))?\d*(?:\d+[E][+-]?\d+)?), ((?=.*\d.*)[-+]?\d*(?:\.(?=\d.*))?\d*(?:\d+[E][+-]?\d+)?)\)$
                 ^^^
error: look-around, including look-ahead and look-behind, is not supported
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
))', tests/tuples.rs:26:1
stack backtrace:
   0: rust_begin_unwind
             at /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/std/src/panicking.rs:517:5
   1: core::panicking::panic_fmt
             at /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/core/src/panicking.rs:100:14
   2: core::result::unwrap_failed
             at /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/core/src/result.rs:1616:5
   3: core::result::Result<T,E>::unwrap
             at /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/core/src/result.rs:1298:23
   4: tuples::_::__init::__INVENTORY::{{closure}}::LAZY::{{closure}}
             at ./tests/tuples.rs:26:1
   5: core::ops::function::FnOnce::call_once
             at /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/core/src/ops/function.rs:227:5
   6: core::ops::function::FnOnce::call_once
             at /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/core/src/ops/function.rs:227:5
   7: once_cell::sync::Lazy<T,F>::force::{{closure}}
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/once_cell-1.9.0/src/lib.rs:1163:28
   8: once_cell::sync::OnceCell<T>::get_or_init::{{closure}}
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/once_cell-1.9.0/src/lib.rs:974:57
   9: once_cell::imp::OnceCell<T>::initialize::{{closure}}
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/once_cell-1.9.0/src/imp_pl.rs:64:19
  10: once_cell::imp::initialize_inner
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/once_cell-1.9.0/src/imp_pl.rs:122:12
  11: once_cell::imp::OnceCell<T>::initialize
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/once_cell-1.9.0/src/imp_pl.rs:54:9
  12: once_cell::sync::OnceCell<T>::get_or_try_init
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/once_cell-1.9.0/src/lib.rs:1014:13
  13: once_cell::sync::OnceCell<T>::get_or_init
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/once_cell-1.9.0/src/lib.rs:974:19
  14: once_cell::sync::Lazy<T,F>::force
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/once_cell-1.9.0/src/lib.rs:1162:13
  15: <once_cell::sync::Lazy<T,F> as core::ops::deref::Deref>::deref
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/once_cell-1.9.0/src/lib.rs:1172:13
  16: tuples::_::__init::__INVENTORY::{{closure}}
             at ./tests/tuples.rs:26:1
  17: core::ops::function::FnOnce::call_once
             at /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/core/src/ops/function.rs:227:5
  18: cucumber::codegen::WorldInit::collection
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/cucumber-0.11.1/src/codegen.rs:42:40
  19: cucumber::codegen::WorldInit::cucumber
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/cucumber-0.11.1/src/codegen.rs:61:31
  20: cucumber::codegen::WorldInit::run::{{closure}}
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/cucumber-0.11.1/src/codegen.rs:80:9
  21: <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll
             at /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/core/src/future/mod.rs:80:19
  22: <core::pin::Pin<P> as core::future::future::Future>::poll
             at /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/core/src/future/future.rs:119:9
  23: futures_executor::local_pool::block_on::{{closure}}
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-executor-0.3.19/src/local_pool.rs:315:23
  24: futures_executor::local_pool::run_executor::{{closure}}
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-executor-0.3.19/src/local_pool.rs:90:37
  25: std::thread::local::LocalKey<T>::try_with
             at /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/std/src/thread/local.rs:399:16
  26: std::thread::local::LocalKey<T>::with
             at /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/std/src/thread/local.rs:375:9
  27: futures_executor::local_pool::run_executor
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-executor-0.3.19/src/local_pool.rs:86:5
  28: futures_executor::local_pool::block_on
             at /Users/jcsho/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-executor-0.3.19/src/local_pool.rs:315:5
  29: tuples::main
             at ./tests/tuples.rs:44:5
  30: core::ops::function::FnOnce::call_once
             at /rustc/f1edd0429582dd29cccacaf50fd134b05593bd9c/library/core/src/ops/function.rs:227:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

Seems to work fine with the {int} type.

[tyranron]

@jcsho cargo update -p cucumber-expressions should solve your problem now.

[jcsho]

amazing! thanks for the quick fix 👍🏼