// Copyright 2014-2015 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // no-pretty-expanded unnecessary unsafe block generated #![deny(warnings)] #![allow(unused_must_use)] #![allow(unknown_features)] #![feature(box_syntax)] use std::fmt; use std::usize; struct A; struct B; struct C; impl fmt::LowerHex for A { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { f.write_str("aloha") } } impl fmt::UpperHex for B { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { f.write_str("adios") } } impl fmt::Display for C { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { f.pad_integral(true, "☃", "123") } } macro_rules! t { ($a:expr, $b:expr) => { assert_eq!($a, $b) } } pub fn main() { // Various edge cases without formats t!(format!(""), ""); t!(format!("hello"), "hello"); t!(format!("hello {{"), "hello {"); // default formatters should work t!(format!("{}", 1.0f32), "1"); t!(format!("{}", 1.0f64), "1"); t!(format!("{}", "a"), "a"); t!(format!("{}", "a".to_string()), "a"); t!(format!("{}", false), "false"); t!(format!("{}", 'a'), "a"); // At least exercise all the formats t!(format!("{}", true), "true"); t!(format!("{}", '☃'), "☃"); t!(format!("{}", 10), "10"); t!(format!("{}", 10_usize), "10"); t!(format!("{:?}", '☃'), "'\\u{2603}'"); t!(format!("{:?}", 10), "10"); t!(format!("{:?}", 10_usize), "10"); t!(format!("{:?}", "true"), "\"true\""); t!(format!("{:?}", "foo\nbar"), "\"foo\\nbar\""); t!(format!("{:o}", 10_usize), "12"); t!(format!("{:x}", 10_usize), "a"); t!(format!("{:X}", 10_usize), "A"); t!(format!("{}", "foo"), "foo"); t!(format!("{}", "foo".to_string()), "foo"); if cfg!(target_pointer_width = "32") { t!(format!("{:#p}", 0x1234 as *const isize), "0x00001234"); t!(format!("{:#p}", 0x1234 as *mut isize), "0x00001234"); } else { t!(format!("{:#p}", 0x1234 as *const isize), "0x0000000000001234"); t!(format!("{:#p}", 0x1234 as *mut isize), "0x0000000000001234"); } t!(format!("{:p}", 0x1234 as *const isize), "0x1234"); t!(format!("{:p}", 0x1234 as *mut isize), "0x1234"); t!(format!("{:x}", A), "aloha"); t!(format!("{:X}", B), "adios"); t!(format!("foo {} ☃☃☃☃☃☃", "bar"), "foo bar ☃☃☃☃☃☃"); t!(format!("{1} {0}", 0, 1), "1 0"); t!(format!("{foo} {bar}", foo=0, bar=1), "0 1"); t!(format!("{foo} {1} {bar} {0}", 0, 1, foo=2, bar=3), "2 1 3 0"); t!(format!("{} {0}", "a"), "a a"); t!(format!("{foo_bar}", foo_bar=1), "1"); t!(format!("{}", 5 + 5), "10"); t!(format!("{:#4}", C), "☃123"); let a: &fmt::Debug = &1; t!(format!("{:?}", a), "1"); // Formatting strings and their arguments t!(format!("{}", "a"), "a"); t!(format!("{:4}", "a"), "a "); t!(format!("{:4}", "☃"), "☃ "); t!(format!("{:>4}", "a"), " a"); t!(format!("{:<4}", "a"), "a "); t!(format!("{:^5}", "a"), " a "); t!(format!("{:^5}", "aa"), " aa "); t!(format!("{:^4}", "a"), " a "); t!(format!("{:^4}", "aa"), " aa "); t!(format!("{:.4}", "a"), "a"); t!(format!("{:4.4}", "a"), "a "); t!(format!("{:4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); t!(format!("{:<4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); t!(format!("{:>4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); t!(format!("{:^4.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); t!(format!("{:>10.4}", "aaaaaaaaaaaaaaaaaa"), "aaaa"); t!(format!("{:2.4}", "aaaaa"), "aaaa"); t!(format!("{:2.4}", "aaaa"), "aaaa"); t!(format!("{:2.4}", "aaa"), "aaa"); t!(format!("{:2.4}", "aa"), "aa"); t!(format!("{:2.4}", "a"), "a "); t!(format!("{:0>2}", "a"), "0a"); t!(format!("{:.*}", 4, "aaaaaaaaaaaaaaaaaa"), "aaaa"); t!(format!("{:.1$}", "aaaaaaaaaaaaaaaaaa", 4), "aaaa"); t!(format!("{:.a$}", "aaaaaaaaaaaaaaaaaa", a=4), "aaaa"); t!(format!("{:1$}", "a", 4), "a "); t!(format!("{1:0$}", 4, "a"), "a "); t!(format!("{:a$}", "a", a=4), "a "); t!(format!("{:-#}", "a"), "a"); t!(format!("{:+#}", "a"), "a"); // Some float stuff t!(format!("{:}", 1.0f32), "1"); t!(format!("{:}", 1.0f64), "1"); t!(format!("{:.3}", 1.0f64), "1.000"); t!(format!("{:10.3}", 1.0f64), " 1.000"); t!(format!("{:+10.3}", 1.0f64), " +1.000"); t!(format!("{:+10.3}", -1.0f64), " -1.000"); t!(format!("{:e}", 1.2345e6f32), "1.2345e6"); t!(format!("{:e}", 1.2345e6f64), "1.2345e6"); t!(format!("{:E}", 1.2345e6f64), "1.2345E6"); t!(format!("{:.3e}", 1.2345e6f64), "1.234e6"); t!(format!("{:10.3e}", 1.2345e6f64), " 1.234e6"); t!(format!("{:+10.3e}", 1.2345e6f64), " +1.234e6"); t!(format!("{:+10.3e}", -1.2345e6f64), " -1.234e6"); // Float edge cases t!(format!("{}", -0.0), "0"); t!(format!("{:?}", -0.0), "-0"); t!(format!("{:?}", 0.0), "0"); // Test that pointers don't get truncated. { let val = usize::MAX; let exp = format!("{:#x}", val); t!(format!("{:p}", val as *const isize), exp); } // Escaping t!(format!("{{"), "{"); t!(format!("}}"), "}"); test_write(); test_print(); test_order(); // make sure that format! doesn't move out of local variables let a: Box<_> = box 3; format!("{}", a); format!("{}", a); // make sure that format! doesn't cause spurious unused-unsafe warnings when // it's inside of an outer unsafe block unsafe { let a: isize = ::std::mem::transmute(3_usize); format!("{}", a); } test_format_args(); // test that trailing commas are acceptable format!("{}", "test",); format!("{foo}", foo="test",); } // Basic test to make sure that we can invoke the `write!` macro with an // fmt::Write instance. fn test_write() { use std::fmt::Write; let mut buf = String::new(); write!(&mut buf, "{}", 3); { let w = &mut buf; write!(w, "{foo}", foo=4); write!(w, "{}", "hello"); writeln!(w, "{}", "line"); writeln!(w, "{foo}", foo="bar"); w.write_char('☃'); w.write_str("str"); } t!(buf, "34helloline\nbar\n☃str"); } // Just make sure that the macros are defined, there's not really a lot that we // can do with them just yet (to test the output) fn test_print() { print!("hi"); print!("{:?}", vec!(0u8)); println!("hello"); println!("this is a {}", "test"); println!("{foo}", foo="bar"); } // Just make sure that the macros are defined, there's not really a lot that we // can do with them just yet (to test the output) fn test_format_args() { use std::fmt::Write; let mut buf = String::new(); { let w = &mut buf; write!(w, "{}", format_args!("{}", 1)); write!(w, "{}", format_args!("test")); write!(w, "{}", format_args!("{test}", test=3)); } let s = buf; t!(s, "1test3"); let s = fmt::format(format_args!("hello {}", "world")); t!(s, "hello world"); let s = format!("{}: {}", "args were", format_args!("hello {}", "world")); t!(s, "args were: hello world"); } fn test_order() { // Make sure format!() arguments are always evaluated in a left-to-right // ordering fn foo() -> isize { static mut FOO: isize = 0; unsafe { FOO += 1; FOO } } assert_eq!(format!("{} {} {a} {b} {} {c}", foo(), foo(), foo(), a=foo(), b=foo(), c=foo()), "1 2 4 5 3 6".to_string()); }