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use proc_macro::TokenStream;
#[path = "../../../guests_macro/src/parse_fn.rs"]
mod parse_fn;
use crate::parse_fn::{ args_split, args_divide, group_streams };
fn get_types() -> (TokenStream, TokenStream) {
let types: Vec<&str> = include_str!("../../../guests/type.txt")
.split('\n')
.collect();
(types[0].parse::<TokenStream>().unwrap(), types[1].parse::<TokenStream>().unwrap())
}
#[proc_macro]
pub fn generate_output_type_input_struct(_: TokenStream) -> TokenStream {
let (args, ret) = get_types();
let output_type = format!("pub type Output = {};", ret).to_string();
let all_args = args_split(&args);
let mut struct_def = "#[derive(Debug, Serialize, Deserialize)] pub struct Input {".to_string();
for arg in all_args {
struct_def += &format!("pub {arg},");
}
let (patterns, types) = args_divide(&args);
let types = group_streams(&types);
struct_def += &format!("}}
impl From<Input> for {types} {{
fn from(input: Input) -> {types} {{
(
");
for field in patterns {
struct_def += &format!("input.{field},");
}
struct_def += ") } }";
(output_type + &struct_def).parse::<TokenStream>().unwrap()
}
#[proc_macro]
pub fn foreach_input_field(item: TokenStream) -> TokenStream {
let (args, _) = get_types();
let arg_patterns = args_divide(&args).0;
let expr = format!("{}", item);
let mut out = String::new();
for field in arg_patterns {
// Unquoted yield is a keyword, so it is not allowed as field name
out += &expr.replace(".yield", &format!(".{field}"));
}
out.parse::<TokenStream>().unwrap()
}
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