removed min const generics feature

CHANGELOG.markdown

@@ -1,5 +1,9 @@
 # Change Log
 
+## Unreleased
+
+- MSRV is now **1.54**. We soft-updated to this in 0.8.0 with a feature `min-const-generics`, which has now been removed (and as such, we resume having no default features).
+
 ## [0.8.0] - 2021-09-17
 
 Welcome to the `0.8.0` update. This is one of the largest updates imgui-rs has ever seen; it will generate errors in a `0.7` project, but hopefully it should be both quick to fix, and enjoyable to update. See our [release page](https://github.com/imgui-rs/imgui-rs/releases/tag/v0.8.0) for more information and a list of contributors to this cycle. Thank you to everyone who uses `imgui-rs`, files issues, and spend their time and effort to PR new changes into the codebase. Because of all that effort, this is by far the best `imgui-rs` has looked!

imgui/Cargo.toml

@@ -18,11 +18,8 @@ imgui-sys = { version = "0.8.1-alpha.0", path = "../imgui-sys" }
 parking_lot = "0.11"
 
 [features]
-default = ["min-const-generics"]
-
 wasm = ["imgui-sys/wasm"]
 freetype = ["imgui-sys/freetype"]
-min-const-generics = []
 # this api is in beta in the upstream imgui crate. See issue #524 for more info.
 # it should be stable and fine to use though.
 tables-api = []

imgui/src/tables.rs

@@ -303,7 +303,7 @@ impl<'ui> Ui<'ui> {
         outer_size: [f32; 2],
         inner_width: f32,
     ) -> Option<TableToken<'ui>> {
-        let should_render = unsafe {
+        unsafe {
             sys::igBeginTable(
                 self.scratch_txt(str_id),
                 column as i32,
@@ -311,13 +311,7 @@ impl<'ui> Ui<'ui> {
                 outer_size.into(),
                 inner_width,
             )
-        };
+            .then(|| TableToken::new(self))
-
-        // todo: once msrv is 1.54, convert this to .then(||)
-        if should_render {
-            Some(TableToken::new(self))
-        } else {
-            None
         }
     }
 
@@ -325,7 +319,6 @@ impl<'ui> Ui<'ui> {
     ///
     /// Takes an array of table header information, the length of which determines
     /// how many columns will be created.
-    #[cfg(feature = "min-const-generics")]
     #[must_use = "if return is dropped immediately, table is ended immediately."]
     pub fn begin_table_header<'a, Name: AsRef<str>, const N: usize>(
         &self,
@@ -339,7 +332,6 @@ impl<'ui> Ui<'ui> {
     ///
     /// Takes an array of table header information, the length of which determines
     /// how many columns will be created.
-    #[cfg(feature = "min-const-generics")]
     #[must_use = "if return is dropped immediately, table is ended immediately."]
     pub fn begin_table_header_with_flags<'a, Name: AsRef<str>, const N: usize>(
         &self,
@@ -354,7 +346,6 @@ impl<'ui> Ui<'ui> {
     /// and gives users the most flexibility.
     /// Takes an array of table header information, the length of which determines
     /// how many columns will be created.
-    #[cfg(feature = "min-const-generics")]
     #[must_use = "if return is dropped immediately, table is ended immediately."]
     pub fn begin_table_header_with_sizing<'a, Name: AsRef<str>, const N: usize>(
         &self,