diff options
author | HampusM <hampus@hampusmat.com> | 2022-11-11 22:52:30 +0100 |
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committer | HampusM <hampus@hampusmat.com> | 2022-11-11 22:52:30 +0100 |
commit | 7793779ce197fa0c917d0ef312bfa9bcfcb64790 (patch) | |
tree | d63d99d659e575fe6d833d95b58503b6cb39293f /test_util_macros/src | |
parent | de5aca66532272a84aeb04cac02bd25bb7afc414 (diff) |
test: add unit test for create_caster_fn_ident
Diffstat (limited to 'test_util_macros/src')
-rw-r--r-- | test_util_macros/src/lib.rs | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/test_util_macros/src/lib.rs b/test_util_macros/src/lib.rs new file mode 100644 index 0000000..aa87ecf --- /dev/null +++ b/test_util_macros/src/lib.rs @@ -0,0 +1,47 @@ +#![deny(clippy::all)] +#![deny(clippy::pedantic)] +#![deny(missing_docs)] + +//! Internal macros used by tests. + +use std::iter::repeat; + +use proc_macro::TokenStream; +use quote::quote; +use syn::parse::Parse; +use syn::{parse_macro_input, LitChar, LitInt, Token}; + +/// Repeats a character N number of times. +#[proc_macro] +pub fn repeat_char(input: TokenStream) -> TokenStream +{ + let RepeatMacroArgs { character, count } = + parse_macro_input!(input as RepeatMacroArgs); + + let repeated = repeat(character.value()).take(count).collect::<String>(); + + quote! { + #repeated + } + .into() +} + +struct RepeatMacroArgs +{ + character: LitChar, + count: usize, +} + +impl Parse for RepeatMacroArgs +{ + fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> + { + let character = input.parse::<LitChar>()?; + + input.parse::<Token![,]>()?; + + let count = input.parse::<LitInt>()?.base10_parse::<usize>()?; + + Ok(Self { character, count }) + } +} |