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Diffstat (limited to 'tests/ui/proc-macro/auxiliary/env.rs')
-rw-r--r-- | tests/ui/proc-macro/auxiliary/env.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/ui/proc-macro/auxiliary/env.rs b/tests/ui/proc-macro/auxiliary/env.rs new file mode 100644 index 000000000..58bcb08bf --- /dev/null +++ b/tests/ui/proc-macro/auxiliary/env.rs @@ -0,0 +1,28 @@ +// force-host +// no-prefer-dynamic + +#![crate_type = "proc-macro"] +#![feature(proc_macro_tracked_env)] + +extern crate proc_macro; + +use proc_macro::TokenStream; +use proc_macro::tracked_env::var; + +#[proc_macro] +pub fn generate_const(input: TokenStream) -> TokenStream { + let the_const = match var("THE_CONST") { + Ok(x) if x == "12" => { + "const THE_CONST: u32 = 12;" + } + _ => { + "const THE_CONST: u32 = 0;" + } + }; + let another = if var("ANOTHER").is_ok() { + "const ANOTHER: u32 = 1;" + } else { + "const ANOTHER: u32 = 2;" + }; + format!("{the_const}{another}").parse().unwrap() +} |