24 lines
736 B
Rust
24 lines
736 B
Rust
use crate::bot::{Command, Context};
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use async_trait::async_trait;
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use std::collections::HashMap;
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#[derive(Default)]
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pub struct Eval {
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last_eval: HashMap<String, f64>,
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}
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#[async_trait]
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impl Command for Eval {
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async fn execute(&mut self, msg: Context<'_>) -> anyhow::Result<String> {
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if let Some(expr) = msg.content {
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let last_eval = self.last_eval.entry(msg.author.into()).or_insert(0.0);
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let mut meval_ctx = meval::Context::new();
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let value = meval::eval_str_with_context(expr, meval_ctx.var("x", *last_eval))?;
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*last_eval = value;
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Ok(format!("{} = {:.10}", expr, value))
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} else {
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Ok("No expression to evaluate".into())
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}
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}
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}
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