make default name be PascalCase

effers-derive/Cargo.toml

@@ -10,3 +10,4 @@ proc-macro = true
 syn = {version = "1.0", features = ["full", "extra-traits", "visit-mut"]}
 quote = "1.0"
 proc-macro2 = "1.0"
+convert_case = "0.5.0"

effers-derive/src/lib.rs

@@ -1,3 +1,4 @@
+use convert_case::{Case, Casing};
 use proc_macro2::{Span, TokenStream};
 use quote::quote;
 use syn::token::{Mut, SelfValue};
@@ -16,7 +17,7 @@ pub fn program(
     let mut args = parse_macro_input!(attr as Args);
 
     if args.name.is_none() {
-        let i = first_letter_to_uppper_case(item.sig.ident.to_string());
+        let i = item.sig.ident.to_string().to_case(Case::Pascal);
         args.name = Some(Ident::new(&i, Span::call_site()));
     }
 
@@ -29,15 +30,6 @@ pub fn program(
     proc_macro::TokenStream::from(out)
 }
 
-// TODO change this to change from camel_case to PascalCase
-fn first_letter_to_uppper_case(s1: String) -> String {
-    let mut c = s1.chars();
-    match c.next() {
-        None => String::new(),
-        Some(f) => f.to_uppercase().collect::<String>() + c.as_str(),
-    }
-}
-
 #[derive(Clone, Copy)]
 struct LettersIter {
     idx: u32,

examples/main.rs

@@ -11,7 +11,7 @@ fn smth(val: u8) -> u8 {
 }
 
 #[program(Printer(print as p))]
-fn other() {
+fn other_program() {
     p("hey hi hello");
 }
 
@@ -28,7 +28,7 @@ fn main() {
     assert_eq!(other_result, 11);
 
     // other program
-    Other.add(IoPrinter).run();
+    OtherProgram.add(IoPrinter).run();
 }
 
 trait Printer {