35 lines
1.2 KiB
Rust
35 lines
1.2 KiB
Rust
use std::{collections::BTreeMap, fs};
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use proc_macro2::{Span, TokenStream};
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use quote::quote;
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use syn::LitInt;
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/// Generates the `TokenStream` for the `get_composter_increase_chance_from_item_id` function.
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pub fn build() -> TokenStream {
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let composter_increase_chance: BTreeMap<u16, f32> = serde_json::from_str(
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&fs::read_to_string("../../assets/composter_increase_chance.json").unwrap(),
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)
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.expect("Failed to parse composter_increase_chance.json");
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let match_arms: Vec<TokenStream> = composter_increase_chance
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.into_iter() // Consume the map for efficiency
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.map(|(item_id, chance)| {
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let item_id_lit = LitInt::new(&item_id.to_string(), Span::call_site());
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let chance_lit = chance;
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quote! {
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#item_id_lit => Some(#chance_lit),
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}
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})
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.collect();
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quote! {
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#[must_use]
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#[allow(clippy::too_many_lines, clippy::match_same_arms)]
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pub const fn get_composter_increase_chance_from_item_id(item_id: u16) -> Option<f32> {
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match item_id {
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#(#match_arms)*
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_ => None,
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}
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}
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}
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}
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