704 lines
24 KiB
Rust
704 lines
24 KiB
Rust
use quote::{quote, ToTokens};
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use syn::{parse::Parse, parse::ParseStream};
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use crate::function::ExportedFn;
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use crate::rhai_module::ExportedConst;
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#[cfg(no_std)]
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use alloc::vec as new_vec;
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#[cfg(not(no_std))]
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use std::vec as new_vec;
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#[cfg(no_std)]
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use core::mem;
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#[derive(Debug)]
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pub(crate) struct Module {
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mod_all: Option<syn::ItemMod>,
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fns: Vec<ExportedFn>,
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consts: Vec<ExportedConst>,
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}
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impl Parse for Module {
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fn parse(input: ParseStream) -> syn::Result<Self> {
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let mod_all: syn::ItemMod = input.parse()?;
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let fns: Vec<_>;
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let consts: Vec<_>;
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if let Some((_, ref content)) = mod_all.content {
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fns = content
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.iter()
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.filter_map(|item| match item {
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syn::Item::Fn(f) => {
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if let syn::Visibility::Public(_) = f.vis {
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Some(f)
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} else {
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None
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}
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}
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_ => None,
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})
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.try_fold(Vec::new(), |mut vec, itemfn| {
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syn::parse2::<ExportedFn>(itemfn.to_token_stream())
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.map(|f| vec.push(f))
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.map(|_| vec)
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})?;
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consts = content
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.iter()
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.filter_map(|item| match item {
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syn::Item::Const(syn::ItemConst {
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vis,
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ref expr,
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ident,
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..
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}) => {
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if let syn::Visibility::Public(_) = vis {
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Some((ident.to_string(), expr.as_ref().clone()))
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} else {
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None
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}
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}
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_ => None,
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})
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.collect();
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} else {
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consts = new_vec![];
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fns = new_vec![];
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}
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Ok(Module {
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mod_all: Some(mod_all),
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fns,
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consts,
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})
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}
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}
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impl Module {
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pub fn generate(self) -> proc_macro2::TokenStream {
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let mod_gen = crate::rhai_module::generate_body(&self.fns, &self.consts);
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let Module { mod_all, .. } = self;
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let mut mod_all = mod_all.unwrap();
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let mod_name = mod_all.ident.clone();
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let (_, orig_content) = mod_all.content.take().unwrap();
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quote! {
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pub mod #mod_name {
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#(#orig_content)*
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#mod_gen
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}
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}
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}
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}
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#[cfg(test)]
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mod module_tests {
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use super::Module;
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use proc_macro2::TokenStream;
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use quote::quote;
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#[test]
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fn empty_module() {
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let input_tokens: TokenStream = quote! {
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pub mod empty { }
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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assert!(item_mod.fns.is_empty());
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assert!(item_mod.consts.is_empty());
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}
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#[test]
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fn one_factory_fn_module() {
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let input_tokens: TokenStream = quote! {
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pub mod one_fn {
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pub fn get_mystic_number() -> INT {
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42
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}
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}
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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assert!(item_mod.consts.is_empty());
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assert_eq!(item_mod.fns.len(), 1);
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assert_eq!(item_mod.fns[0].name().to_string(), "get_mystic_number");
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assert_eq!(item_mod.fns[0].arg_count(), 0);
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assert_eq!(
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item_mod.fns[0].return_type().unwrap(),
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&syn::parse2::<syn::Type>(quote! { INT }).unwrap()
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);
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}
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#[test]
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fn one_single_arg_fn_module() {
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let input_tokens: TokenStream = quote! {
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pub mod one_fn {
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pub fn add_one_to(x: INT) -> INT {
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x + 1
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}
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}
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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assert!(item_mod.consts.is_empty());
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assert_eq!(item_mod.fns.len(), 1);
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assert_eq!(item_mod.fns[0].name().to_string(), "add_one_to");
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assert_eq!(item_mod.fns[0].arg_count(), 1);
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assert_eq!(
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item_mod.fns[0].arg_list().next().unwrap(),
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&syn::parse2::<syn::FnArg>(quote! { x: INT }).unwrap()
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);
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assert_eq!(
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item_mod.fns[0].return_type().unwrap(),
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&syn::parse2::<syn::Type>(quote! { INT }).unwrap()
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);
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}
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#[test]
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fn one_double_arg_fn_module() {
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let input_tokens: TokenStream = quote! {
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pub mod one_fn {
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pub fn add_together(x: INT, y: INT) -> INT {
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x + y
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}
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}
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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let mut args = item_mod.fns[0].arg_list();
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assert!(item_mod.consts.is_empty());
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assert_eq!(item_mod.fns.len(), 1);
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assert_eq!(item_mod.fns[0].name().to_string(), "add_together");
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assert_eq!(item_mod.fns[0].arg_count(), 2);
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assert_eq!(
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args.next().unwrap(),
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&syn::parse2::<syn::FnArg>(quote! { x: INT }).unwrap()
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);
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assert_eq!(
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args.next().unwrap(),
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&syn::parse2::<syn::FnArg>(quote! { y: INT }).unwrap()
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);
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assert!(args.next().is_none());
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assert_eq!(
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item_mod.fns[0].return_type().unwrap(),
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&syn::parse2::<syn::Type>(quote! { INT }).unwrap()
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);
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}
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#[test]
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fn one_constant_module() {
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let input_tokens: TokenStream = quote! {
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pub mod one_constant {
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pub const MYSTIC_NUMBER: INT = 42;
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}
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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assert!(item_mod.fns.is_empty());
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assert_eq!(item_mod.consts.len(), 1);
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assert_eq!(&item_mod.consts[0].0, "MYSTIC_NUMBER");
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assert_eq!(
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item_mod.consts[0].1,
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syn::parse2::<syn::Expr>(quote! { 42 }).unwrap()
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);
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}
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#[test]
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fn one_private_fn_module() {
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let input_tokens: TokenStream = quote! {
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pub mod one_fn {
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fn get_mystic_number() -> INT {
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42
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}
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}
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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assert!(item_mod.fns.is_empty());
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assert!(item_mod.consts.is_empty());
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}
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#[test]
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fn one_private_constant_module() {
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let input_tokens: TokenStream = quote! {
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pub mod one_constant {
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const MYSTIC_NUMBER: INT = 42;
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}
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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assert!(item_mod.fns.is_empty());
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assert!(item_mod.consts.is_empty());
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}
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}
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#[cfg(test)]
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mod generate_tests {
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use super::Module;
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use proc_macro2::TokenStream;
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use quote::quote;
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fn assert_streams_eq(actual: TokenStream, expected: TokenStream) {
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let actual = actual.to_string();
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let expected = expected.to_string();
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if &actual != &expected {
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let mut counter = 0;
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let iter = actual
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.chars()
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.zip(expected.chars())
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.inspect(|_| counter += 1)
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.skip_while(|(a, e)| *a == *e);
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let (actual_diff, expected_diff) = {
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let mut actual_diff = String::new();
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let mut expected_diff = String::new();
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for (a, e) in iter.take(50) {
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actual_diff.push(a);
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expected_diff.push(e);
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}
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(actual_diff, expected_diff)
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};
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eprintln!("actual != expected, diverge at char {}", counter);
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}
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assert_eq!(actual, expected);
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}
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#[test]
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fn empty_module() {
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let input_tokens: TokenStream = quote! {
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pub mod empty { }
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};
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let expected_tokens = quote! {
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pub mod empty {
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#[allow(unused_imports)]
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use super::*;
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#[allow(unused_mut)]
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pub fn rhai_module_generate() -> Module {
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let mut m = Module::new();
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m
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}
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}
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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assert_streams_eq(item_mod.generate(), expected_tokens);
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}
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#[test]
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fn one_factory_fn_module() {
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let input_tokens: TokenStream = quote! {
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pub mod one_fn {
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pub fn get_mystic_number() -> INT {
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42
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}
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}
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};
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let expected_tokens = quote! {
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pub mod one_fn {
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pub fn get_mystic_number() -> INT {
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42
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}
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#[allow(unused_imports)]
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use super::*;
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#[allow(unused_mut)]
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pub fn rhai_module_generate() -> Module {
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let mut m = Module::new();
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m.set_fn("get_mystic_number", FnAccess::Public, &[],
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CallableFunction::from_plugin(get_mystic_number_token()));
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m
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}
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#[allow(non_camel_case_types)]
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struct get_mystic_number_token();
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impl PluginFunction for get_mystic_number_token {
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fn call(&self,
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args: &mut [&mut Dynamic], pos: Position
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) -> Result<Dynamic, Box<EvalAltResult>> {
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if args.len() != 0usize {
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return Err(Box::new(EvalAltResult::ErrorRuntime(
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format!("wrong arg count: {} != {}",
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args.len(), 0usize), Position::none())));
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}
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Ok(Dynamic::from(get_mystic_number()))
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}
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fn is_method_call(&self) -> bool { false }
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fn is_varadic(&self) -> bool { false }
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fn clone_boxed(&self) -> Box<dyn PluginFunction> {
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Box::new(get_mystic_number_token())
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}
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fn input_types(&self) -> Box<[TypeId]> {
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new_vec![].into_boxed_slice()
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}
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}
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pub fn get_mystic_number_token_callable() -> CallableFunction {
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CallableFunction::from_plugin(get_mystic_number_token())
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}
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pub fn get_mystic_number_token_input_types() -> Box<[TypeId]> {
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get_mystic_number_token().input_types()
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}
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}
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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assert_streams_eq(item_mod.generate(), expected_tokens);
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}
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#[test]
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fn one_single_arg_fn_module() {
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let input_tokens: TokenStream = quote! {
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pub mod one_fn {
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pub fn add_one_to(x: INT) -> INT {
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x + 1
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}
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}
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};
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let expected_tokens = quote! {
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pub mod one_fn {
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pub fn add_one_to(x: INT) -> INT {
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x + 1
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}
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#[allow(unused_imports)]
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use super::*;
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#[allow(unused_mut)]
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pub fn rhai_module_generate() -> Module {
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let mut m = Module::new();
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m.set_fn("add_one_to", FnAccess::Public, &[core::any::TypeId::of::<INT>()],
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CallableFunction::from_plugin(add_one_to_token()));
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m
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}
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#[allow(non_camel_case_types)]
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struct add_one_to_token();
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impl PluginFunction for add_one_to_token {
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fn call(&self,
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args: &mut [&mut Dynamic], pos: Position
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) -> Result<Dynamic, Box<EvalAltResult>> {
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if args.len() != 1usize {
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return Err(Box::new(EvalAltResult::ErrorRuntime(
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format!("wrong arg count: {} != {}",
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args.len(), 1usize), Position::none())));
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}
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let arg0 = mem::take(args[0usize]).clone().cast::<INT>();
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Ok(Dynamic::from(add_one_to(arg0)))
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}
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fn is_method_call(&self) -> bool { false }
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fn is_varadic(&self) -> bool { false }
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fn clone_boxed(&self) -> Box<dyn PluginFunction> {
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Box::new(add_one_to_token())
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}
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fn input_types(&self) -> Box<[TypeId]> {
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new_vec![TypeId::of::<INT>()].into_boxed_slice()
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}
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}
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pub fn add_one_to_token_callable() -> CallableFunction {
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CallableFunction::from_plugin(add_one_to_token())
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}
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pub fn add_one_to_token_input_types() -> Box<[TypeId]> {
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add_one_to_token().input_types()
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}
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}
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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assert_streams_eq(item_mod.generate(), expected_tokens);
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}
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#[test]
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fn one_double_arg_fn_module() {
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let input_tokens: TokenStream = quote! {
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pub mod one_fn {
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pub fn add_together(x: INT, y: INT) -> INT {
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x + y
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}
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}
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};
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let expected_tokens = quote! {
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pub mod one_fn {
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pub fn add_together(x: INT, y: INT) -> INT {
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x + y
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}
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#[allow(unused_imports)]
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use super::*;
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#[allow(unused_mut)]
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pub fn rhai_module_generate() -> Module {
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let mut m = Module::new();
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m.set_fn("add_together", FnAccess::Public, &[core::any::TypeId::of::<INT>(),
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core::any::TypeId::of::<INT>()],
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CallableFunction::from_plugin(add_together_token()));
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m
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}
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#[allow(non_camel_case_types)]
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struct add_together_token();
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impl PluginFunction for add_together_token {
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fn call(&self,
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args: &mut [&mut Dynamic], pos: Position
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) -> Result<Dynamic, Box<EvalAltResult>> {
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if args.len() != 2usize {
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return Err(Box::new(EvalAltResult::ErrorRuntime(
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format!("wrong arg count: {} != {}",
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args.len(), 2usize), Position::none())));
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}
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let arg0 = mem::take(args[0usize]).clone().cast::<INT>();
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let arg1 = mem::take(args[1usize]).clone().cast::<INT>();
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Ok(Dynamic::from(add_together(arg0, arg1)))
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}
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fn is_method_call(&self) -> bool { false }
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fn is_varadic(&self) -> bool { false }
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fn clone_boxed(&self) -> Box<dyn PluginFunction> {
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Box::new(add_together_token())
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}
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fn input_types(&self) -> Box<[TypeId]> {
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new_vec![TypeId::of::<INT>(),
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TypeId::of::<INT>()].into_boxed_slice()
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}
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}
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pub fn add_together_token_callable() -> CallableFunction {
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CallableFunction::from_plugin(add_together_token())
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}
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pub fn add_together_token_input_types() -> Box<[TypeId]> {
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add_together_token().input_types()
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}
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}
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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assert_streams_eq(item_mod.generate(), expected_tokens);
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}
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|
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#[test]
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fn one_constant_module() {
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let input_tokens: TokenStream = quote! {
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pub mod one_constant {
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pub const MYSTIC_NUMBER: INT = 42;
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}
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};
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let expected_tokens = quote! {
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pub mod one_constant {
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pub const MYSTIC_NUMBER: INT = 42;
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#[allow(unused_imports)]
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use super::*;
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#[allow(unused_mut)]
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pub fn rhai_module_generate() -> Module {
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let mut m = Module::new();
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m.set_var("MYSTIC_NUMBER", 42);
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m
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}
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}
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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assert_streams_eq(item_mod.generate(), expected_tokens);
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}
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#[test]
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fn one_constant_module_imports_preserved() {
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let input_tokens: TokenStream = quote! {
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pub mod one_constant {
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pub use rhai::INT;
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pub const MYSTIC_NUMBER: INT = 42;
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}
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};
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let expected_tokens = quote! {
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pub mod one_constant {
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pub use rhai::INT;
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pub const MYSTIC_NUMBER: INT = 42;
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#[allow(unused_imports)]
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use super::*;
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#[allow(unused_mut)]
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pub fn rhai_module_generate() -> Module {
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let mut m = Module::new();
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m.set_var("MYSTIC_NUMBER", 42);
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m
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}
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}
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};
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let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
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assert_streams_eq(item_mod.generate(), expected_tokens);
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}
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|
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#[test]
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fn one_private_fn_module() {
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let input_tokens: TokenStream = quote! {
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pub mod one_fn {
|
|
fn get_mystic_number() -> INT {
|
|
42
|
|
}
|
|
}
|
|
};
|
|
|
|
let expected_tokens = quote! {
|
|
pub mod one_fn {
|
|
fn get_mystic_number() -> INT {
|
|
42
|
|
}
|
|
#[allow(unused_imports)]
|
|
use super::*;
|
|
#[allow(unused_mut)]
|
|
pub fn rhai_module_generate() -> Module {
|
|
let mut m = Module::new();
|
|
m
|
|
}
|
|
}
|
|
};
|
|
|
|
let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
|
|
assert_streams_eq(item_mod.generate(), expected_tokens);
|
|
}
|
|
|
|
#[test]
|
|
fn one_private_constant_module() {
|
|
let input_tokens: TokenStream = quote! {
|
|
pub mod one_constant {
|
|
const MYSTIC_NUMBER: INT = 42;
|
|
}
|
|
};
|
|
|
|
let expected_tokens = quote! {
|
|
pub mod one_constant {
|
|
const MYSTIC_NUMBER: INT = 42;
|
|
#[allow(unused_imports)]
|
|
use super::*;
|
|
#[allow(unused_mut)]
|
|
pub fn rhai_module_generate() -> Module {
|
|
let mut m = Module::new();
|
|
m
|
|
}
|
|
}
|
|
};
|
|
|
|
let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
|
|
assert_streams_eq(item_mod.generate(), expected_tokens);
|
|
}
|
|
|
|
#[test]
|
|
fn one_str_arg_fn_module() {
|
|
let input_tokens: TokenStream = quote! {
|
|
pub mod str_fn {
|
|
pub fn print_out_to(x: &str) {
|
|
x + 1
|
|
}
|
|
}
|
|
};
|
|
|
|
let expected_tokens = quote! {
|
|
pub mod str_fn {
|
|
pub fn print_out_to(x: &str) {
|
|
x + 1
|
|
}
|
|
#[allow(unused_imports)]
|
|
use super::*;
|
|
#[allow(unused_mut)]
|
|
pub fn rhai_module_generate() -> Module {
|
|
let mut m = Module::new();
|
|
m.set_fn("print_out_to", FnAccess::Public,
|
|
&[core::any::TypeId::of::<ImmutableString>()],
|
|
CallableFunction::from_plugin(print_out_to_token()));
|
|
m
|
|
}
|
|
#[allow(non_camel_case_types)]
|
|
struct print_out_to_token();
|
|
impl PluginFunction for print_out_to_token {
|
|
fn call(&self,
|
|
args: &mut [&mut Dynamic], pos: Position
|
|
) -> Result<Dynamic, Box<EvalAltResult>> {
|
|
if args.len() != 1usize {
|
|
return Err(Box::new(EvalAltResult::ErrorRuntime(
|
|
format!("wrong arg count: {} != {}",
|
|
args.len(), 1usize), Position::none())));
|
|
}
|
|
let arg0 = mem::take(args[0usize]).clone().cast::<ImmutableString>();
|
|
Ok(Dynamic::from(print_out_to(&arg0)))
|
|
}
|
|
|
|
fn is_method_call(&self) -> bool { false }
|
|
fn is_varadic(&self) -> bool { false }
|
|
fn clone_boxed(&self) -> Box<dyn PluginFunction> {
|
|
Box::new(print_out_to_token())
|
|
}
|
|
fn input_types(&self) -> Box<[TypeId]> {
|
|
new_vec![TypeId::of::<ImmutableString>()].into_boxed_slice()
|
|
}
|
|
}
|
|
pub fn print_out_to_token_callable() -> CallableFunction {
|
|
CallableFunction::from_plugin(print_out_to_token())
|
|
}
|
|
pub fn print_out_to_token_input_types() -> Box<[TypeId]> {
|
|
print_out_to_token().input_types()
|
|
}
|
|
}
|
|
};
|
|
|
|
let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
|
|
assert_streams_eq(item_mod.generate(), expected_tokens);
|
|
}
|
|
|
|
#[test]
|
|
fn one_mut_ref_fn_module() {
|
|
let input_tokens: TokenStream = quote! {
|
|
pub mod ref_fn {
|
|
pub fn increment(x: &mut FLOAT) {
|
|
*x += 1.0 as FLOAT;
|
|
}
|
|
}
|
|
};
|
|
|
|
let expected_tokens = quote! {
|
|
pub mod ref_fn {
|
|
pub fn increment(x: &mut FLOAT) {
|
|
*x += 1.0 as FLOAT;
|
|
}
|
|
#[allow(unused_imports)]
|
|
use super::*;
|
|
#[allow(unused_mut)]
|
|
pub fn rhai_module_generate() -> Module {
|
|
let mut m = Module::new();
|
|
m.set_fn("increment", FnAccess::Public,
|
|
&[core::any::TypeId::of::<FLOAT>()],
|
|
CallableFunction::from_plugin(increment_token()));
|
|
m
|
|
}
|
|
#[allow(non_camel_case_types)]
|
|
struct increment_token();
|
|
impl PluginFunction for increment_token {
|
|
fn call(&self,
|
|
args: &mut [&mut Dynamic], pos: Position
|
|
) -> Result<Dynamic, Box<EvalAltResult>> {
|
|
if args.len() != 1usize {
|
|
return Err(Box::new(EvalAltResult::ErrorRuntime(
|
|
format!("wrong arg count: {} != {}",
|
|
args.len(), 1usize), Position::none())));
|
|
}
|
|
let arg0: &mut _ = &mut args[0usize].write_lock::<FLOAT>().unwrap();
|
|
Ok(Dynamic::from(increment(arg0)))
|
|
}
|
|
|
|
fn is_method_call(&self) -> bool { true }
|
|
fn is_varadic(&self) -> bool { false }
|
|
fn clone_boxed(&self) -> Box<dyn PluginFunction> {
|
|
Box::new(increment_token())
|
|
}
|
|
fn input_types(&self) -> Box<[TypeId]> {
|
|
new_vec![TypeId::of::<FLOAT>()].into_boxed_slice()
|
|
}
|
|
}
|
|
pub fn increment_token_callable() -> CallableFunction {
|
|
CallableFunction::from_plugin(increment_token())
|
|
}
|
|
pub fn increment_token_input_types() -> Box<[TypeId]> {
|
|
increment_token().input_types()
|
|
}
|
|
}
|
|
};
|
|
|
|
let item_mod = syn::parse2::<Module>(input_tokens).unwrap();
|
|
assert_streams_eq(item_mod.generate(), expected_tokens);
|
|
}
|
|
}
|