Remove duplicate TokenStream quoter tests (modulo imports).
This commit is contained in:
Jeffrey Seyfried
parent
e5b0829bb0
commit
ec29011346
4 changed files with 0 additions and 233 deletions
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// Copyright 2015 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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#![allow(unused_parens)]
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#![feature(plugin)]
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#![feature(plugin_registrar)]
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#![feature(rustc_private)]
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#![plugin(proc_macro_plugin)]
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extern crate rustc_plugin;
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extern crate proc_macro_tokens;
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extern crate syntax;
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use proc_macro_tokens::build::ident_eq;
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use syntax::ast::Ident;
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use syntax::ext::base::{ExtCtxt, MacResult};
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use syntax::ext::proc_macro_shim::build_block_emitter;
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use syntax::tokenstream::{TokenTree, TokenStream};
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use syntax::codemap::Span;
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use rustc_plugin::Registry;
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#[plugin_registrar]
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pub fn plugin_registrar(reg: &mut Registry) {
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reg.register_macro("cond", cond);
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}
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fn cond<'cx>(cx: &'cx mut ExtCtxt, sp: Span, tts: &[TokenTree]) -> Box<MacResult + 'cx> {
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let output = cond_rec(TokenStream::from_tts(tts.clone().to_owned()));
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build_block_emitter(cx, sp, output)
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}
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fn cond_rec(input: TokenStream) -> TokenStream {
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if input.is_empty() {
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return qquote!();
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}
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let next = input.slice(0..1);
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let rest = input.slice_from(1..);
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let clause : TokenStream = match next.maybe_delimited() {
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Some(ts) => ts,
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_ => panic!("Invalid input"),
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};
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// clause is ([test]) [rhs]
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if clause.len() < 2 { panic!("Invalid macro usage in cond: {:?}", clause) }
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let test: TokenStream = clause.slice(0..1);
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let rhs: TokenStream = clause.slice_from(1..);
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if ident_eq(&test[0], Ident::from_str("else")) || rest.is_empty() {
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qquote!({unquote(rhs)})
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} else {
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qquote!({if unquote(test) { unquote(rhs) } else { cond!(unquote(rest)) } })
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}
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}
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@ -1,60 +0,0 @@
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// Copyright 2015 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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#![allow(unused_parens)]
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#![feature(plugin)]
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#![feature(plugin_registrar)]
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#![feature(rustc_private)]
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#![plugin(proc_macro_plugin)]
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extern crate rustc_plugin;
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extern crate proc_macro_tokens;
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extern crate syntax;
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use syntax::ext::proc_macro_shim::prelude::*;
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use proc_macro_tokens::prelude::*;
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use rustc_plugin::Registry;
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#[plugin_registrar]
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pub fn plugin_registrar(reg: &mut Registry) {
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reg.register_macro("cond", cond);
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}
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fn cond<'cx>(cx: &'cx mut ExtCtxt, sp: Span, tts: &[TokenTree]) -> Box<MacResult + 'cx> {
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let output = cond_rec(TokenStream::from_tts(tts.clone().to_owned()));
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build_block_emitter(cx, sp, output)
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}
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fn cond_rec(input: TokenStream) -> TokenStream {
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if input.is_empty() {
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return qquote!();
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}
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let next = input.slice(0..1);
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let rest = input.slice_from(1..);
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let clause : TokenStream = match next.maybe_delimited() {
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Some(ts) => ts,
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_ => panic!("Invalid input"),
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};
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// clause is ([test]) [rhs]
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if clause.len() < 2 { panic!("Invalid macro usage in cond: {:?}", clause) }
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let test: TokenStream = clause.slice(0..1);
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let rhs: TokenStream = clause.slice_from(1..);
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if ident_eq(&test[0], Ident::from_str("else")) || rest.is_empty() {
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qquote!({unquote(rhs)})
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} else {
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qquote!({if unquote(test) { unquote(rhs) } else { cond!(unquote(rest)) } })
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}
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}
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@ -1,54 +0,0 @@
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// Copyright 2012-2014 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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// aux-build:cond_noprelude_plugin.rs
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// ignore-stage1
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#![feature(plugin)]
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#![feature(rustc_private)]
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#![plugin(cond_noprelude_plugin)]
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fn fact(n : i64) -> i64 {
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if n == 0 {
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1
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} else {
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n * fact(n - 1)
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}
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}
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fn fact_cond(n : i64) -> i64 {
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cond!(
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((n == 0) 1)
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(else (n * fact_cond(n-1)))
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)
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}
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fn fib(n : i64) -> i64 {
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if n == 0 || n == 1 {
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1
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} else {
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fib(n-1) + fib(n-2)
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}
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}
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fn fib_cond(n : i64) -> i64 {
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cond!(
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((n == 0) 1)
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((n == 1) 1)
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(else (fib_cond(n-1) + fib_cond(n-2)))
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)
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}
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fn main() {
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assert_eq!(fact(3), fact_cond(3));
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assert_eq!(fact(5), fact_cond(5));
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assert_eq!(fib(5), fib_cond(5));
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assert_eq!(fib(8), fib_cond(8));
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}
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@ -1,54 +0,0 @@
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// Copyright 2012-2014 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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// aux-build:cond_prelude_plugin.rs
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// ignore-stage1
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#![feature(plugin)]
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#![feature(rustc_private)]
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#![plugin(cond_prelude_plugin)]
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fn fact(n : i64) -> i64 {
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if n == 0 {
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1
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} else {
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n * fact(n - 1)
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}
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}
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fn fact_cond(n : i64) -> i64 {
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cond!(
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((n == 0) 1)
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(else (n * fact_cond(n-1)))
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)
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}
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fn fib(n : i64) -> i64 {
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if n == 0 || n == 1 {
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1
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} else {
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fib(n-1) + fib(n-2)
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}
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}
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fn fib_cond(n : i64) -> i64 {
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cond!(
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((n == 0) 1)
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((n == 1) 1)
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(else (fib_cond(n-1) + fib_cond(n-2)))
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)
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}
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fn main() {
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assert_eq!(fact(3), fact_cond(3));
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assert_eq!(fact(5), fact_cond(5));
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assert_eq!(fib(5), fib_cond(5));
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assert_eq!(fib(8), fib_cond(8));
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}
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