split off to_chars_array

build.rs

@@ -82,24 +82,7 @@ fn main() {
 		let chars_array = format!(
 			"const VALID_EXTRA_CHARS: [char; {}] = {};",
 			filtered_chars.len(),
-			[
-				"[",
-				&filtered_chars
-					.iter()
-					.map(|c| format!("'{}'", c.escape_unicode()))
-					.enumerate()
-					.map(|(i, x)| {
-						// Add comma and space if needed
-						match filtered_chars.len() > i + 1 {
-							true => x + ", ",
-							false => x,
-						}
-					})
-					.collect::<Vec<String>>()
-					.concat(),
-				"]",
-			]
-			.concat()
+			to_chars_array(filtered_chars),
 		);
 		let path = Path::new(&env::var("OUT_DIR").unwrap()).join("valid_chars.rs");
 		let mut file = BufWriter::new(File::create(&path).expect("Could not save compressed_data"));

src/lib.rs

@@ -36,7 +36,7 @@ pub use crate::{
 		step_helper,
 		EguiHelper,
 	},
-	unicode_helper::to_unicode_hash,
+	unicode_helper::{to_chars_array, to_unicode_hash},
 };
 
 cfg_if::cfg_if! {

src/unicode_helper.rs

@@ -7,3 +7,25 @@ pub fn to_unicode_hash(c: char) -> String {
 		.replace('}', "")
 		.to_uppercase()
 }
+
+#[allow(dead_code)]
+pub fn to_chars_array(chars: Vec<char>) -> String {
+	[
+		"[",
+		&chars
+			.iter()
+			.map(|c| format!("'{}'", c.escape_unicode()))
+			.enumerate()
+			.map(|(i, x)| {
+				// Add comma and space if needed
+				match chars.len() > i + 1 {
+					true => x + ", ",
+					false => x,
+				}
+			})
+			.collect::<Vec<String>>()
+			.concat(),
+		"]",
+	]
+	.concat()
+}

tests/misc.rs

@@ -201,3 +201,12 @@ fn to_unicode_hash() {
 	use ytbn_graphing_software::to_unicode_hash;
 	assert_eq!(to_unicode_hash('\u{1f31e}'), "\\U1F31E");
 }
+
+#[test]
+fn to_chars_array() {
+	use ytbn_graphing_software::to_chars_array;
+	assert_eq!(
+		to_chars_array(vec!['\u{1f31e}', '\u{2d12c}']),
+		r#"['\u{1f31e}', '\u{2d12c}']"#
+	);
+}