feat: add project & repeat_char macroHEADmaster

7 files changed, 319 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/target
+/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..1ca2db0
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "utility-macros"
+version = "0.1.0"
+description = "Utility macros that should be in std but is not"
+edition = "2021"
+
+[lib]
+proc_macro = true
+
+[dependencies]
+syn = { version = "1.0.96", features = ["full"] }
+quote = "1.0.18"
diff --git a/LICENSE-APACHE b/LICENSE-APACHE
new file mode 100644
index 0000000..ef26755
--- /dev/null
+++ b/LICENSE-APACHE
@@ -0,0 +1,202 @@
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diff --git a/LICENSE-MIT b/LICENSE-MIT
new file mode 100644
index 0000000..a621992
--- /dev/null
+++ b/LICENSE-MIT
@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) 2022 HampusM
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
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diff --git a/examples/simple.rs b/examples/simple.rs
new file mode 100644
index 0000000..b3e5582
--- /dev/null
+++ b/examples/simple.rs
@@ -0,0 +1,8 @@
+use utility_macros::repeat_char;
+
+fn main()
+{
+    let dashes = repeat_char!('-', 16);
+
+    println!("{dashes}\n  Hello world!\n{dashes}");
+}
diff --git a/rustfmt.toml b/rustfmt.toml
new file mode 100644
index 0000000..4d1e29f
--- /dev/null
+++ b/rustfmt.toml
@@ -0,0 +1,11 @@
+max_width = 90
+brace_style = "AlwaysNextLine"
+group_imports = "StdExternalCrate"
+wrap_comments = true
+comment_width = 90
+format_code_in_doc_comments = true
+imports_layout = "HorizontalVertical"
+imports_granularity = "Module"
+newline_style = "Unix"
+reorder_impl_items = true
+
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..5649972
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,62 @@
+#![deny(clippy::all)]
+#![deny(clippy::pedantic)]
+#![deny(missing_docs)]
+
+//! Utility macros that should be in std but is not.
+
+use std::iter::repeat;
+
+use proc_macro::TokenStream;
+use quote::quote;
+use syn::parse::Parse;
+use syn::{parse_macro_input, LitChar, LitInt, Token};
+
+/// Repeats a character N number of times resulting in a string literal.
+///
+/// # Arguments
+/// Seperated by commas.
+///
+/// - The character to repeat
+/// - Number of times to repeat it.
+///
+/// # Examples
+/// ```
+/// # use utility_macros::repeat_char;
+///
+/// let eight_o = repeat_char!('o', 8);
+///
+/// assert_eq!(eight_o, "oooooooo");
+/// ```
+#[proc_macro]
+pub fn repeat_char(input: TokenStream) -> TokenStream
+{
+    let RepeatCharMacroArgs { character, count } =
+        parse_macro_input!(input as RepeatCharMacroArgs);
+
+    let repeated = repeat(character.value()).take(count).collect::<String>();
+
+    quote! {
+        #repeated
+    }
+    .into()
+}
+
+struct RepeatCharMacroArgs
+{
+    character: LitChar,
+    count: usize,
+}
+
+impl Parse for RepeatCharMacroArgs
+{
+    fn parse(input: syn::parse::ParseStream) -> syn::Result<Self>
+    {
+        let character = input.parse::<LitChar>()?;
+
+        input.parse::<Token![,]>()?;
+
+        let count = input.parse::<LitInt>()?.base10_parse::<usize>()?;
+
+        Ok(Self { character, count })
+    }
+}