59 lines
1.8 KiB
Rust
59 lines
1.8 KiB
Rust
// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// no-prefer-dynamic
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#![crate_type = "proc-macro"]
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extern crate proc_macro;
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use proc_macro::TokenStream;
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#[proc_macro_attribute]
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pub fn expect_let(attr: TokenStream, item: TokenStream) -> TokenStream {
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assert!(attr.to_string().is_empty());
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assert_eq!(item.to_string(), "let string = \"Hello, world!\";");
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item
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}
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#[proc_macro_attribute]
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pub fn expect_print_stmt(attr: TokenStream, item: TokenStream) -> TokenStream {
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assert!(attr.to_string().is_empty());
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assert_eq!(item.to_string(), "println!(\"{}\" , string);");
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item
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}
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#[proc_macro_attribute]
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pub fn expect_expr(attr: TokenStream, item: TokenStream) -> TokenStream {
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assert!(attr.to_string().is_empty());
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assert_eq!(item.to_string(), "print_str(\"string\")");
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item
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}
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#[proc_macro_attribute]
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pub fn expect_print_expr(attr: TokenStream, item: TokenStream) -> TokenStream {
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assert!(attr.to_string().is_empty());
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assert_eq!(item.to_string(), "println!(\"{}\" , string)");
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item
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}
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#[proc_macro_attribute]
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pub fn duplicate(attr: TokenStream, item: TokenStream) -> TokenStream {
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assert!(attr.to_string().is_empty());
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format!("{}, {}", item, item).parse().unwrap()
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}
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#[proc_macro_attribute]
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pub fn no_output(attr: TokenStream, item: TokenStream) -> TokenStream {
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assert!(attr.to_string().is_empty());
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assert!(!item.to_string().is_empty());
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"".parse().unwrap()
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}
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