Macro error when compiling

[jeanmanguy]

Describe the bug

Hi, I would like to try your library but sadly tui 0.10 doesn't compile. Something with the crossterm backend and some macro apparently. Am I doing something wrong?

   Compiling tui v0.10.0
error[E0599]: no method named `flush` found for struct `std::string::String` in the current scope
  --> C:\Users\Jean\.cargo\registry\src\github.aaakk.us.kg-1ecc6299db9ec823\tui-0.10.0\src\backend\crossterm.rs:64:19
   |
64 |         map_error(queue!(string, MoveTo(0, 0)))?;
   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `std::string::String`
   |
   = help: items from traits can only be used if the trait is implemented and in scope
note: `backend::Backend` defines an item `flush`, perhaps you need to implement it
  --> C:\Users\Jean\.cargo\registry\src\github.aaakk.us.kg-1ecc6299db9ec823\tui-0.10.0\src\backend\mod.rs:29:1
   |
29 | pub trait Backend {
   | ^^^^^^^^^^^^^^^^^
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0599]: no method named `flush` found for struct `std::string::String` in the current scope
  --> C:\Users\Jean\.cargo\registry\src\github.aaakk.us.kg-1ecc6299db9ec823\tui-0.10.0\src\backend\crossterm.rs:67:27
   |
67 |                 map_error(queue!(string, MoveTo(x, y)))?;
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `std::string::String`
   |
   = help: items from traits can only be used if the trait is implemented and in scope
note: `backend::Backend` defines an item `flush`, perhaps you need to implement it
  --> C:\Users\Jean\.cargo\registry\src\github.aaakk.us.kg-1ecc6299db9ec823\tui-0.10.0\src\backend\mod.rs:29:1
   |
29 | pub trait Backend {
   | ^^^^^^^^^^^^^^^^^
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0599]: no method named `flush` found for struct `std::string::String` in the current scope
  --> C:\Users\Jean\.cargo\registry\src\github.aaakk.us.kg-1ecc6299db9ec823\tui-0.10.0\src\backend\crossterm.rs:81:27
   |
81 |                 map_error(queue!(string, SetForegroundColor(color)))?;
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `std::string::String`
   |
   = help: items from traits can only be used if the trait is implemented and in scope
note: `backend::Backend` defines an item `flush`, perhaps you need to implement it
  --> C:\Users\Jean\.cargo\registry\src\github.aaakk.us.kg-1ecc6299db9ec823\tui-0.10.0\src\backend\mod.rs:29:1
   |
29 | pub trait Backend {
   | ^^^^^^^^^^^^^^^^^
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0599]: no method named `flush` found for struct `std::string::String` in the current scope
  --> C:\Users\Jean\.cargo\registry\src\github.aaakk.us.kg-1ecc6299db9ec823\tui-0.10.0\src\backend\crossterm.rs:86:27
   |
86 |                 map_error(queue!(string, SetBackgroundColor(color)))?;
   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `std::string::String`
   |
   = help: items from traits can only be used if the trait is implemented and in scope
note: `backend::Backend` defines an item `flush`, perhaps you need to implement it
  --> C:\Users\Jean\.cargo\registry\src\github.aaakk.us.kg-1ecc6299db9ec823\tui-0.10.0\src\backend\mod.rs:29:1
   |
29 | pub trait Backend {
   | ^^^^^^^^^^^^^^^^^
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0599]: no method named `flush` found for type parameter `W` in the current scope
   --> C:\Users\Jean\.cargo\registry\src\github.aaakk.us.kg-1ecc6299db9ec823\tui-0.10.0\src\backend\crossterm.rs:242:23
    |
242 |             map_error(queue!(w, SetAttribute(CAttribute::NormalIntensity)))?;
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `W`
    |
    = help: items from traits can only be used if the type parameter is bounded by the trait
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
help: the following traits define an item `flush`, perhaps you need to restrict type parameter `W` with one of them:
    |
236 |     fn queue<W: backend::Backend>(&self, mut w: W) -> io::Result<()>
    |              ^^^^^^^^^^^^^^^^^^^
236 |     fn queue<W: std::io::Write>(&self, mut w: W) -> io::Result<()>
    |              ^^^^^^^^^^^^^^^^^

error[E0599]: no method named `flush` found for type parameter `W` in the current scope
   --> C:\Users\Jean\.cargo\registry\src\github.aaakk.us.kg-1ecc6299db9ec823\tui-0.10.0\src\backend\crossterm.rs:245:23
    |
245 |             map_error(queue!(w, SetAttribute(CAttribute::NoUnderline)))?;
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `W`
    |
    = help: items from traits can only be used if the type parameter is bounded by the trait
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
help: the following traits define an item `flush`, perhaps you need to restrict type parameter `W` with one of them:
    |
236 |     fn queue<W: backend::Backend>(&self, mut w: W) -> io::Result<()>
    |              ^^^^^^^^^^^^^^^^^^^
236 |     fn queue<W: std::io::Write>(&self, mut w: W) -> io::Result<()>
    |              ^^^^^^^^^^^^^^^^^

error[E0599]: no method named `flush` found for type parameter `W` in the current scope
   --> C:\Users\Jean\.cargo\registry\src\github.aaakk.us.kg-1ecc6299db9ec823\tui-0.10.0\src\backend\crossterm.rs:250:23
    |
250 |             map_error(queue!(w, SetAttribute(CAttribute::Bold)))?;
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `W`
    |
    = help: items from traits can only be used if the type parameter is bounded by the trait
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
help: the following traits define an item `flush`, perhaps you need to restrict type parameter `W` with one of them:
    |
236 |     fn queue<W: backend::Backend>(&self, mut w: W) -> io::Result<()>
    |              ^^^^^^^^^^^^^^^^^^^
236 |     fn queue<W: std::io::Write>(&self, mut w: W) -> io::Result<()>
    |              ^^^^^^^^^^^^^^^^^

error[E0599]: no method named `flush` found for type parameter `W` in the current scope
   --> C:\Users\Jean\.cargo\registry\src\github.aaakk.us.kg-1ecc6299db9ec823\tui-0.10.0\src\backend\crossterm.rs:253:23
    |
253 |             map_error(queue!(w, SetAttribute(CAttribute::Underlined)))?;
    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ method not found in `W`
    |
    = help: items from traits can only be used if the type parameter is bounded by the trait
    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
help: the following traits define an item `flush`, perhaps you need to restrict type parameter `W` with one of them:
    |
236 |     fn queue<W: backend::Backend>(&self, mut w: W) -> io::Result<()>
    |              ^^^^^^^^^^^^^^^^^^^
236 |     fn queue<W: std::io::Write>(&self, mut w: W) -> io::Result<()>
    |              ^^^^^^^^^^^^^^^^^

error: aborting due to 8 previous errors

To Reproduce

I added Tui with crossterm as dependencies

[dependencies]
tui = { version = "0.10", features = ["crossterm"], default-features = false }

cargo build

Interestingly, 0.8 compiles and 0.9 doesn't.

[dependencies]
tui = { version = "0.8", features = ["crossterm"], default-features = false }

Demos don't work either, I get the same error.

cargo run --example crossterm_demo --no-default-features --features="crossterm" --release -- --tick-rate 200

Expected behavior

Tui to compile.

Screenshots
N/A

Desktop (please complete the following information):

• OS: Windows 10
• Terminal Emulator: N/A
• Font: N/A
• Crate version: from 0.9 to 0.10
• Backend: crossterm

Additional context

Toolchain:
stable-x86_64-pc-windows-msvc (default)
rustc 1.46.0 (04488afe3 2020-08-24)

[spenserblack]

I'm also experiencing this in my CI. It might be Windows-only -- Linux is fine. It seems that crossterm 0.17.8 introduced a change that breaks tui with the crossterm feature. It's fine when crossterm is 0.17.7. Try adding crossterm = "0.17.7" to your Cargo.toml. I think that will force tui to then use 0.17.7, and then tui should compile.

[jeanmanguy]

Yes, it works with crossterm = "=0.17.7" after deleting Cargo.lock. Thank you.

Hopefully that will help figuring out a fix.

[extrawurst]

Having the same issue in gitui: gitui-org/gitui#279

[alvinhochun]

I proposed a fix in PR #368.