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example for better error messages

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Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2019-07-17 16:49:19 +02:00
parent 18d6fc28b4
commit a1c8b00f17
1 changed files with 4 additions and 2 deletions
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6
proxmox-api-macro/src/api_macro.rs
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@ -3,7 +3,7 @@ use std::collections::HashMap;
use proc_macro2::{Delimiter, Ident, Span, TokenStream, TokenTree};
use failure::{bail, format_err, Error};
use quote::{quote, ToTokens};
use quote::{quote, quote_spanned, ToTokens};
use syn::{Expr, Token};
use super::api_def::{CommonTypeDefinition, ParameterDefinition};
@ -43,7 +43,9 @@ fn handle_function(
mut item: syn::ItemFn,
) -> Result<TokenStream, Error> {
if item.decl.generics.lt_token.is_some() {
bail!("cannot use generic functions for api macros currently");
return Ok(quote_spanned! { item.decl.generics.lt_token.unwrap().span =>
compile_error!("cannot use generic functions for api macros currently");
}.into());
// Not until we stabilize our generated representation!
}