add rustfmt.toml

rustfmt.toml

@@ -0,0 +1,38 @@
+edition = "2021"
+max_width = 90
+newline_style = "Unix"
+unstable_features = true
+
+# skip generated files
+format_generated_files = false
+
+# always use tabs.
+hard_tabs = true
+tab_spaces = 4
+
+# commas inbetween but not after
+match_block_trailing_comma = true
+trailing_comma = "Never"
+
+# fix my imports for me
+imports_granularity = "Crate"
+#group_imports = "One"
+
+# format everything
+format_code_in_doc_comments = true
+format_macro_matchers = true
+
+# don't keep outdated syntax
+use_field_init_shorthand = true
+use_try_shorthand = true
+
+# condense Struct { _, _ } to Struct { .. }
+condense_wildcard_suffixes = true
+
+# prefer foo(Bar { \n }) over foo(\nBar { \n }\n)
+overflow_delimited_expr = true
+
+# I wish there was a way to allow 0..n but not a + 1..b + 2
+# However, the later looks so terible that I use spaces everywhere
+# https://github.com/rust-lang/rustfmt/issues/3367
+spaces_around_ranges = true