32 lines
1.1 KiB
Rust
32 lines
1.1 KiB
Rust
use proc_macro2::{Span, TokenStream};
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use quote::quote;
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use std::{collections::BTreeMap, fs};
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use syn::LitInt;
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/// Generates the `TokenStream` for the `get_recipe_remainder_id` function.
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pub fn build() -> TokenStream {
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let remainder: BTreeMap<u16, u16> =
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serde_json::from_str(&fs::read_to_string("../assets/recipe_remainder.json").unwrap())
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.expect("Failed to parse recipe_remainder.json");
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let match_arms: Vec<TokenStream> = remainder
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.into_iter()
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.map(|(item_id, remainder_id)| {
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let item_id_lit = LitInt::new(&item_id.to_string(), Span::call_site());
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let remainder_id_lit = LitInt::new(&remainder_id.to_string(), Span::call_site());
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quote! {
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#item_id_lit => Some(#remainder_id_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::match_same_arms)]
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pub const fn get_recipe_remainder_id(item_id: u16) -> Option<u16> {
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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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