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repr: add very basic support for functions

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Closes #8917
This commit is contained in:
Daniel Micay 2013-09-03 04:45:00 -04:00
parent 09ad0cd362
commit a6a993ee71
1 changed files with 17 additions and 5 deletions
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22
src/libstd/repr.rs
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@ -566,14 +566,22 @@ impl<'self> TyVisitor for ReprVisitor<'self> {
true
}
fn visit_fn_input(&mut self, _i: uint, _mode: uint, _inner: *TyDesc) -> bool {
// FIXME: #8917: should print out the parameter types here, separated by commas
fn visit_fn_input(&mut self, i: uint, _mode: uint, inner: *TyDesc) -> bool {
if i != 0 {
self.writer.write(", ".as_bytes());
}
let name = unsafe { (*inner).name };
self.writer.write(name.as_bytes());
true
}
fn visit_fn_output(&mut self, _retstyle: uint, _inner: *TyDesc) -> bool {
fn visit_fn_output(&mut self, _retstyle: uint, inner: *TyDesc) -> bool {
self.writer.write(")".as_bytes());
// FIXME: #8917: should print out the output type here, as `-> T`
let name = unsafe { (*inner).name };
if name != "()" {
self.writer.write(" -> ".as_bytes());
self.writer.write(name.as_bytes());
}
true
}
@ -620,6 +628,8 @@ fn test_repr() {
use str;
use str::Str;
use rt::io::Decorator;
use util::swap;
use char::is_alphabetic;
fn exact_test<T>(t: &T, e:&str) {
let mut m = io::mem::MemWriter::new();
@ -674,7 +684,9 @@ fn test_repr() {
exact_test(&(10u64, ~"hello"),
"(10u64, ~\"hello\")");
exact_test(&(&println), "&fn()");
exact_test(&println, "fn(&str)");
exact_test(&swap::<int>, "fn(&mut int, &mut int)");
exact_test(&is_alphabetic, "fn(char) -> bool");
exact_test(&(~5 as ~ToStr), "~to_str::ToStr:Send");
struct Foo;