219 lines
7.1 KiB
Rust
219 lines
7.1 KiB
Rust
// Copyright 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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// no-pretty-expanded unnecessary unsafe block generated
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// ignore-lexer-test FIXME #15679
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#![feature(macro_rules)]
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#![deny(warnings)]
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#![allow(unused_must_use)]
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extern crate debug;
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use std::fmt;
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use std::gc::GC;
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use std::io::MemWriter;
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use std::io;
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use std::str;
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struct A;
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struct B;
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impl fmt::Signed for A {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.write("aloha".as_bytes())
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}
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}
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impl fmt::Signed for B {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.write("adios".as_bytes())
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}
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}
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macro_rules! t(($a:expr, $b:expr) => { assert_eq!($a.as_slice(), $b) })
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pub fn main() {
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// Make sure there's a poly formatter that takes anything
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t!(format!("{:?}", 1i), "1");
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t!(format!("{:?}", A), "A");
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t!(format!("{:?}", ()), "()");
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t!(format!("{:?}", box(GC) (box 1i, "foo")), "box(GC) (box 1, \"foo\")");
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// Various edge cases without formats
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t!(format!(""), "");
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t!(format!("hello"), "hello");
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t!(format!("hello {{"), "hello {");
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// default formatters should work
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t!(format!("{}", 1.0f32), "1");
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t!(format!("{}", 1.0f64), "1");
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t!(format!("{}", "a"), "a");
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t!(format!("{}", "a".to_string()), "a");
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t!(format!("{}", false), "false");
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t!(format!("{}", 'a'), "a");
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// At least exercise all the formats
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t!(format!("{:b}", true), "true");
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t!(format!("{:c}", '☃'), "☃");
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t!(format!("{:d}", 10i), "10");
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t!(format!("{:i}", 10i), "10");
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t!(format!("{:u}", 10u), "10");
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t!(format!("{:o}", 10u), "12");
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t!(format!("{:x}", 10u), "a");
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t!(format!("{:X}", 10u), "A");
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t!(format!("{:s}", "foo"), "foo");
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t!(format!("{:s}", "foo".to_string()), "foo");
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t!(format!("{:p}", 0x1234 as *const int), "0x1234");
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t!(format!("{:p}", 0x1234 as *mut int), "0x1234");
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t!(format!("{:d}", A), "aloha");
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t!(format!("{:d}", B), "adios");
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t!(format!("foo {:s} ☃☃☃☃☃☃", "bar"), "foo bar ☃☃☃☃☃☃");
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t!(format!("{1} {0}", 0i, 1i), "1 0");
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t!(format!("{foo} {bar}", foo=0i, bar=1i), "0 1");
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t!(format!("{foo} {1} {bar} {0}", 0i, 1i, foo=2i, bar=3i), "2 1 3 0");
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t!(format!("{} {0}", "a"), "a a");
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t!(format!("{foo_bar}", foo_bar=1i), "1");
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t!(format!("{:d}", 5i + 5i), "10");
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let a: &fmt::Show = &1i;
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t!(format!("{}", a), "1");
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// Formatting strings and their arguments
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t!(format!("{:s}", "a"), "a");
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t!(format!("{:4s}", "a"), "a ");
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t!(format!("{:>4s}", "a"), " a");
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t!(format!("{:<4s}", "a"), "a ");
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t!(format!("{:.4s}", "a"), "a");
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t!(format!("{:4.4s}", "a"), "a ");
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t!(format!("{:4.4s}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
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t!(format!("{:<4.4s}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
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t!(format!("{:>4.4s}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
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t!(format!("{:>10.4s}", "aaaaaaaaaaaaaaaaaa"), "aaaa");
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t!(format!("{:2.4s}", "aaaaa"), "aaaa");
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t!(format!("{:2.4s}", "aaaa"), "aaaa");
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t!(format!("{:2.4s}", "aaa"), "aaa");
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t!(format!("{:2.4s}", "aa"), "aa");
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t!(format!("{:2.4s}", "a"), "a ");
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t!(format!("{:0>2s}", "a"), "0a");
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t!(format!("{:.*s}", 4, "aaaaaaaaaaaaaaaaaa"), "aaaa");
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t!(format!("{:.1$s}", "aaaaaaaaaaaaaaaaaa", 4), "aaaa");
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t!(format!("{:.a$s}", "aaaaaaaaaaaaaaaaaa", a=4), "aaaa");
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t!(format!("{:1$s}", "a", 4), "a ");
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t!(format!("{1:0$s}", 4, "a"), "a ");
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t!(format!("{:a$s}", "a", a=4), "a ");
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t!(format!("{:-#s}", "a"), "a");
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t!(format!("{:+#s}", "a"), "a");
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// Some float stuff
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t!(format!("{:f}", 1.0f32), "1");
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t!(format!("{:f}", 1.0f64), "1");
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t!(format!("{:.3f}", 1.0f64), "1.000");
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t!(format!("{:10.3f}", 1.0f64), " 1.000");
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t!(format!("{:+10.3f}", 1.0f64), " +1.000");
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t!(format!("{:+10.3f}", -1.0f64), " -1.000");
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t!(format!("{:e}", 1.2345e6f32), "1.2345e6");
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t!(format!("{:e}", 1.2345e6f64), "1.2345e6");
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t!(format!("{:E}", 1.2345e6f64), "1.2345E6");
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t!(format!("{:.3e}", 1.2345e6f64), "1.234e6");
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t!(format!("{:10.3e}", 1.2345e6f64), " 1.234e6");
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t!(format!("{:+10.3e}", 1.2345e6f64), " +1.234e6");
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t!(format!("{:+10.3e}", -1.2345e6f64), " -1.234e6");
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// Escaping
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t!(format!("{{"), "{");
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t!(format!("}}"), "}");
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test_write();
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test_print();
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test_order();
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// make sure that format! doesn't move out of local variables
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let a = box 3i;
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format!("{:?}", a);
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format!("{:?}", a);
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// make sure that format! doesn't cause spurious unused-unsafe warnings when
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// it's inside of an outer unsafe block
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unsafe {
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let a: int = ::std::mem::transmute(3u);
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format!("{}", a);
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}
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test_format_args();
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// test that trailing commas are acceptable
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format!("{}", "test",);
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format!("{foo}", foo="test",);
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}
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// Basic test to make sure that we can invoke the `write!` macro with an
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// io::Writer instance.
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fn test_write() {
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let mut buf = MemWriter::new();
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write!(&mut buf as &mut io::Writer, "{}", 3i);
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{
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let w = &mut buf as &mut io::Writer;
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write!(w, "{foo}", foo=4i);
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write!(w, "{:s}", "hello");
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writeln!(w, "{}", "line");
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writeln!(w, "{foo}", foo="bar");
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}
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let s = str::from_utf8(buf.unwrap().as_slice()).unwrap().to_string();
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t!(s, "34helloline\nbar\n");
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}
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// Just make sure that the macros are defined, there's not really a lot that we
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// can do with them just yet (to test the output)
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fn test_print() {
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print!("hi");
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print!("{:?}", vec!(0u8));
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println!("hello");
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println!("this is a {}", "test");
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println!("{foo}", foo="bar");
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}
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// Just make sure that the macros are defined, there's not really a lot that we
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// can do with them just yet (to test the output)
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fn test_format_args() {
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let mut buf = MemWriter::new();
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{
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let w = &mut buf as &mut io::Writer;
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format_args!(|args| { write!(w, "{}", args); }, "{}", 1i);
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format_args!(|args| { write!(w, "{}", args); }, "test");
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format_args!(|args| { write!(w, "{}", args); }, "{test}", test=3i);
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}
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let s = str::from_utf8(buf.unwrap().as_slice()).unwrap().to_string();
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t!(s, "1test3");
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let s = format_args!(fmt::format, "hello {}", "world");
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t!(s, "hello world");
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let s = format_args!(|args| {
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format!("{}: {}", "args were", args)
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}, "hello {}", "world");
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t!(s, "args were: hello world");
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}
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fn test_order() {
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// Make sure format!() arguments are always evaluated in a left-to-right
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// ordering
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fn foo() -> int {
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static mut FOO: int = 0;
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unsafe {
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FOO += 1;
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FOO
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}
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}
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assert_eq!(format!("{} {} {a} {b} {} {c}",
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foo(), foo(), foo(), a=foo(), b=foo(), c=foo()),
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"1 2 4 5 3 6".to_string());
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}
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