diff options
Diffstat (limited to 'macros/src/lib.rs')
| -rw-r--r-- | macros/src/lib.rs | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/macros/src/lib.rs b/macros/src/lib.rs index a03dc30e..23b03712 100644 --- a/macros/src/lib.rs +++ b/macros/src/lib.rs @@ -4,12 +4,18 @@ extern crate proc_macro; /// Return an error at the given item. macro_rules! bail { + (callsite, $fmt:literal $($tts:tt)*) => { + return Err(syn::Error::new( + proc_macro2::Span::call_site(), + format!(concat!("typst: ", $fmt) $($tts)*) + )) + }; ($item:expr, $fmt:literal $($tts:tt)*) => { - return Err(Error::new_spanned( + return Err(syn::Error::new_spanned( &$item, format!(concat!("typst: ", $fmt) $($tts)*) )) - } + }; } mod capable; @@ -19,9 +25,8 @@ mod node; use proc_macro::TokenStream as BoundaryStream; use proc_macro2::{TokenStream, TokenTree}; -use quote::{quote, quote_spanned}; -use syn::parse_quote; -use syn::{Error, Ident, Result}; +use quote::{quote, quote_spanned, ToTokens}; +use syn::{parse_quote, Ident, Result}; /// Implement `FuncType` for a type or function. #[proc_macro_attribute] @@ -88,3 +93,11 @@ fn documentation(attrs: &[syn::Attribute]) -> String { fn dedent(text: &str) -> String { text.lines().map(str::trim).collect::<Vec<_>>().join("\n") } + +/// Quote an optional value. +fn quote_option<T: ToTokens>(option: Option<T>) -> TokenStream { + match option { + Some(value) => quote! { Some(#value) }, + None => quote! { None }, + } +} |