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36 changes: 36 additions & 0 deletions
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src/test/run-pass-fulldeps/proc-macro/auxiliary/count_compound_ops.rs
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// http://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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// no-prefer-dynamic | ||
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#![feature(proc_macro)] | ||
#![crate_type = "proc-macro"] | ||
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extern crate proc_macro; | ||
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use proc_macro::{TokenStream, TokenKind, OpKind, Literal, quote}; | ||
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#[proc_macro] | ||
pub fn count_compound_ops(input: TokenStream) -> TokenStream { | ||
assert_eq!(count_compound_ops_helper(quote!(++ (&&) 4@a)), 3); | ||
TokenKind::Literal(Literal::u32(count_compound_ops_helper(input))).into() | ||
} | ||
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fn count_compound_ops_helper(input: TokenStream) -> u32 { | ||
let mut count = 0; | ||
for token in input { | ||
match token.kind { | ||
TokenKind::Op(c, OpKind::Alone) => count += 1, | ||
TokenKind::Sequence(_, tokens) => count += count_compound_ops_helper(tokens), | ||
_ => {} | ||
} | ||
} | ||
count | ||
} |
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src/test/run-pass-fulldeps/proc-macro/count_compound_ops.rs
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// http://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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// aux-build:count_compound_ops.rs | ||
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#![feature(proc_macro)] | ||
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extern crate count_compound_ops; | ||
use count_compound_ops::count_compound_ops; | ||
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fn main() { | ||
assert_eq!(count_compound_ops!(foo<=>bar <<<! -baz ++), 4); | ||
} |