040f1c06bc
This is more consistent with other parts of the language and it also makes it easier to use in situations where format string is massive.
295 lines
10 KiB
Rust
295 lines
10 KiB
Rust
// Copyright 2013 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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// xfail-fast: check-fast screws up repr paths
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#[deny(warnings)];
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use std::fmt;
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use std::rt::io::Decorator;
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use std::rt::io::mem::MemWriter;
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use std::rt::io;
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use std::rt::io::Writer;
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use std::str;
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struct A;
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struct B;
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#[fmt="foo"]
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impl fmt::Signed for A {
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fn fmt(_: &A, f: &mut fmt::Formatter) { f.buf.write("aloha".as_bytes()); }
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}
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impl fmt::Signed for B {
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fn fmt(_: &B, f: &mut fmt::Formatter) { f.buf.write("adios".as_bytes()); }
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}
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macro_rules! t(($a:expr, $b:expr) => { assert_eq!($a, $b.to_owned()) })
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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!("{:?}", 1), "1");
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t!(format!("{:?}", A), "A");
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t!(format!("{:?}", ()), "()");
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t!(format!("{:?}", @(~1, "foo")), "@(~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!("{}", 1i), "1");
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t!(format!("{}", 1i8), "1");
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t!(format!("{}", 1i16), "1");
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t!(format!("{}", 1i32), "1");
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t!(format!("{}", 1i64), "1");
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t!(format!("{}", 1u), "1");
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t!(format!("{}", 1u8), "1");
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t!(format!("{}", 1u16), "1");
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t!(format!("{}", 1u32), "1");
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t!(format!("{}", 1u64), "1");
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t!(format!("{}", 1.0f), "1");
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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"), "a");
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t!(format!("{}", @"a"), "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}", 10), "10");
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t!(format!("{:i}", 10), "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"), "foo");
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t!(format!("{:s}", @"foo"), "foo");
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t!(format!("{:p}", 0x1234 as *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}", 0, 1), "1 0");
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t!(format!("{foo} {bar}", foo=0, bar=1), "0 1");
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t!(format!("{foo} {1} {bar} {0}", 0, 1, foo=2, bar=3), "2 1 3 0");
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t!(format!("{} {0:s}", "a"), "a a");
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t!(format!("{} {0}", "a"), "a a");
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t!(format!("{foo_bar}", foo_bar=1), "1");
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// Methods should probably work
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t!(format!("{0, plural, =1{a#} =2{b#} zero{c#} other{d#}}", 0u), "c0");
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t!(format!("{0, plural, =1{a#} =2{b#} zero{c#} other{d#}}", 1u), "a1");
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t!(format!("{0, plural, =1{a#} =2{b#} zero{c#} other{d#}}", 2u), "b2");
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t!(format!("{0, plural, =1{a#} =2{b#} zero{c#} other{d#}}", 3u), "d3");
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t!(format!("{0, select, a{a#} b{b#} c{c#} other{d#}}", "a"), "aa");
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t!(format!("{0, select, a{a#} b{b#} c{c#} other{d#}}", "b"), "bb");
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t!(format!("{0, select, a{a#} b{b#} c{c#} other{d#}}", "c"), "cc");
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t!(format!("{0, select, a{a#} b{b#} c{c#} other{d#}}", "d"), "dd");
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t!(format!("{1, select, a{#{0:s}} other{#{1}}}", "b", "a"), "ab");
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t!(format!("{1, select, a{#{0}} other{#{1}}}", "c", "b"), "bb");
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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!("{:1$s}", "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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// Formatting integers should select the right implementation based off the
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// type of the argument. Also, hex/octal/binary should be defined for
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// integers, but they shouldn't emit the negative sign.
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t!(format!("{:d}", -1i), "-1");
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t!(format!("{:d}", -1i8), "-1");
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t!(format!("{:d}", -1i16), "-1");
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t!(format!("{:d}", -1i32), "-1");
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t!(format!("{:d}", -1i64), "-1");
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t!(format!("{:t}", 1i), "1");
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t!(format!("{:t}", 1i8), "1");
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t!(format!("{:t}", 1i16), "1");
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t!(format!("{:t}", 1i32), "1");
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t!(format!("{:t}", 1i64), "1");
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t!(format!("{:x}", 1i), "1");
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t!(format!("{:x}", 1i8), "1");
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t!(format!("{:x}", 1i16), "1");
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t!(format!("{:x}", 1i32), "1");
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t!(format!("{:x}", 1i64), "1");
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t!(format!("{:X}", 1i), "1");
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t!(format!("{:X}", 1i8), "1");
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t!(format!("{:X}", 1i16), "1");
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t!(format!("{:X}", 1i32), "1");
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t!(format!("{:X}", 1i64), "1");
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t!(format!("{:o}", 1i), "1");
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t!(format!("{:o}", 1i8), "1");
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t!(format!("{:o}", 1i16), "1");
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t!(format!("{:o}", 1i32), "1");
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t!(format!("{:o}", 1i64), "1");
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t!(format!("{:u}", 1u), "1");
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t!(format!("{:u}", 1u8), "1");
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t!(format!("{:u}", 1u16), "1");
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t!(format!("{:u}", 1u32), "1");
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t!(format!("{:u}", 1u64), "1");
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t!(format!("{:t}", 1u), "1");
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t!(format!("{:t}", 1u8), "1");
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t!(format!("{:t}", 1u16), "1");
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t!(format!("{:t}", 1u32), "1");
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t!(format!("{:t}", 1u64), "1");
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t!(format!("{:x}", 1u), "1");
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t!(format!("{:x}", 1u8), "1");
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t!(format!("{:x}", 1u16), "1");
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t!(format!("{:x}", 1u32), "1");
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t!(format!("{:x}", 1u64), "1");
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t!(format!("{:X}", 1u), "1");
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t!(format!("{:X}", 1u8), "1");
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t!(format!("{:X}", 1u16), "1");
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t!(format!("{:X}", 1u32), "1");
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t!(format!("{:X}", 1u64), "1");
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t!(format!("{:o}", 1u), "1");
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t!(format!("{:o}", 1u8), "1");
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t!(format!("{:o}", 1u16), "1");
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t!(format!("{:o}", 1u32), "1");
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t!(format!("{:o}", 1u64), "1");
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// Test the flags for formatting integers
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t!(format!("{:3d}", 1), " 1");
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t!(format!("{:>3d}", 1), " 1");
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t!(format!("{:>+3d}", 1), " +1");
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t!(format!("{:<3d}", 1), "1 ");
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t!(format!("{:#d}", 1), "1");
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t!(format!("{:#x}", 10), "0xa");
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t!(format!("{:#X}", 10), "0xA");
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t!(format!("{:#5x}", 10), " 0xa");
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t!(format!("{:#o}", 10), "0o12");
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t!(format!("{:08x}", 10), "0000000a");
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t!(format!("{:8x}", 10), " a");
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t!(format!("{:<8x}", 10), "a ");
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t!(format!("{:>8x}", 10), " a");
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t!(format!("{:#08x}", 10), "0x00000a");
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t!(format!("{:08d}", -10), "-0000010");
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t!(format!("{:x}", -1u8), "ff");
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t!(format!("{:X}", -1u8), "FF");
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t!(format!("{:t}", -1u8), "11111111");
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t!(format!("{:o}", -1u8), "377");
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t!(format!("{:#x}", -1u8), "0xff");
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t!(format!("{:#X}", -1u8), "0xFF");
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t!(format!("{:#t}", -1u8), "0b11111111");
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t!(format!("{:#o}", -1u8), "0o377");
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// Signed combinations
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t!(format!("{:+5d}", 1), " +1");
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t!(format!("{:+5d}", -1), " -1");
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t!(format!("{:05d}", 1), "00001");
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t!(format!("{:05d}", -1), "-0001");
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t!(format!("{:+05d}", 1), "+0001");
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t!(format!("{:+05d}", -1), "-0001");
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// Some float stuff
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t!(format!("{:f}", 1.0f), "1");
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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}", 1.0f), "1.000");
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t!(format!("{:10.3f}", 1.0f), " 1.000");
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t!(format!("{:+10.3f}", 1.0f), " +1.000");
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t!(format!("{:+10.3f}", -1.0f), " -1.000");
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// Escaping
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t!(format!("\\{"), "{");
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t!(format!("\\}"), "}");
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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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// make sure that format! doesn't move out of local variables
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let a = ~3;
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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::cast::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, "{}", 3);
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{
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let w = &mut buf as &mut io::Writer;
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write!(w, "{foo}", foo=4);
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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_owned(buf.inner());
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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!("{:?}", ~[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| { fmt::write(w, args) }, "{}", 1);
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format_args!(|args| { fmt::write(w, args) }, "test");
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format_args!(|args| { fmt::write(w, args) }, "{test}", test=3);
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}
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let s = str::from_utf8_owned(buf.inner());
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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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}
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