revert: using code blocks makes simple calculations more annoying to write

src/commands/eval.rs

@@ -1,10 +1,29 @@
 use crate::common::{self, Context, Error};
 use std::io::Cursor;
 
-/// Evaluate a program written in the Lamm programming language
+/// Evaluates a Lamm program
-#[poise::command(prefix_command, aliases("lamm"))]
+#[poise::command(slash_command, prefix_command, aliases("lamm"))]
-pub async fn eval(ctx: Context<'_>, expr: poise::CodeBlock) -> Result<(), Error> {
+pub async fn eval(ctx: Context<'_>,
-	let runtime = lamm::Runtime::new(Cursor::new(expr.code), "<eval>");
+                  #[rest]
+                  expr: String) -> Result<(), Error>
+{
+	let expr = if expr.starts_with("```\n") {
+		expr.strip_prefix("```\n")
+		.and_then(|s| s.strip_suffix("```"))
+		.unwrap_or(&expr)
+	} else if expr.starts_with("```") {
+		expr.strip_prefix("```")
+		.and_then(|s| s.strip_suffix("```"))
+		.unwrap_or(&expr)
+	} else if expr.starts_with('`') {
+		expr.strip_prefix("`")
+			.and_then(|s| s.strip_suffix("`"))
+			.unwrap_or(&expr)
+	} else {
+		&expr
+	};
+
+	let runtime = lamm::Runtime::new(Cursor::new(expr), "<eval>");
 
 	let values = runtime.values()
 		.map(|res| res.map(|value| value.to_string()))