1018 lines
32 KiB
Rust
1018 lines
32 KiB
Rust
// Copyright 2012 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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/*!
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More runtime type reflection
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*/
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#[forbid(deprecated_mode)];
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#[forbid(deprecated_pattern)];
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use dvec::DVec;
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use io::{Writer, WriterUtil};
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use libc::c_void;
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use sys::TypeDesc;
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use to_str::ToStr;
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use cast::transmute;
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use intrinsic::{TyDesc, TyVisitor, visit_tydesc};
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use reflect::{MovePtr, MovePtrAdaptor};
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use vec::UnboxedVecRepr;
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use vec::raw::{VecRepr, SliceRepr};
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pub use managed::raw::BoxRepr;
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use managed::raw::BoxHeaderRepr;
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/// Helpers
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/// Helper function for alignment calculation.
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#[inline(always)]
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fn align(size: uint, align: uint) -> uint {
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((size + align) - 1) & !(align - 1)
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}
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trait EscapedCharWriter {
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fn write_escaped_char(ch: char);
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}
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impl Writer : EscapedCharWriter {
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fn write_escaped_char(ch: char) {
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match ch {
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'\t' => self.write_str("\\t"),
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'\r' => self.write_str("\\r"),
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'\n' => self.write_str("\\n"),
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'\\' => self.write_str("\\\\"),
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'\'' => self.write_str("\\'"),
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'"' => self.write_str("\\\""),
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'\x20'..'\x7e' => self.write_char(ch),
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_ => {
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// XXX: This is inefficient because it requires a malloc.
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self.write_str(char::escape_unicode(ch))
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}
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}
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}
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}
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/// Representations
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trait Repr {
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fn write_repr(writer: @Writer);
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}
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impl () : Repr {
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fn write_repr(writer: @Writer) { writer.write_str("()"); }
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}
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impl bool : Repr {
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fn write_repr(writer: @Writer) {
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writer.write_str(if self { "true" } else { "false" })
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}
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}
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impl int : Repr {
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fn write_repr(writer: @Writer) { writer.write_int(self); }
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}
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impl i8 : Repr {
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fn write_repr(writer: @Writer) { writer.write_int(self as int); }
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}
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impl i16 : Repr {
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fn write_repr(writer: @Writer) { writer.write_int(self as int); }
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}
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impl i32 : Repr {
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fn write_repr(writer: @Writer) { writer.write_int(self as int); }
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}
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impl i64 : Repr {
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// XXX: This can lose precision.
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fn write_repr(writer: @Writer) { writer.write_int(self as int); }
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}
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impl uint : Repr {
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fn write_repr(writer: @Writer) { writer.write_uint(self); }
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}
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impl u8 : Repr {
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fn write_repr(writer: @Writer) { writer.write_uint(self as uint); }
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}
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impl u16 : Repr {
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fn write_repr(writer: @Writer) { writer.write_uint(self as uint); }
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}
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impl u32 : Repr {
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fn write_repr(writer: @Writer) { writer.write_uint(self as uint); }
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}
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impl u64 : Repr {
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// XXX: This can lose precision.
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fn write_repr(writer: @Writer) { writer.write_uint(self as uint); }
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}
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impl float : Repr {
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// XXX: This mallocs.
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fn write_repr(writer: @Writer) { writer.write_str(self.to_str()); }
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}
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impl f32 : Repr {
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// XXX: This mallocs.
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fn write_repr(writer: @Writer) { writer.write_str(self.to_str()); }
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}
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impl f64 : Repr {
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// XXX: This mallocs.
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fn write_repr(writer: @Writer) { writer.write_str(self.to_str()); }
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}
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impl char : Repr {
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fn write_repr(writer: @Writer) { writer.write_char(self); }
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}
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// New implementation using reflect::MovePtr
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struct ReprVisitor {
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mut ptr: *c_void,
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writer: @Writer
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}
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fn ReprVisitor(ptr: *c_void, writer: @Writer) -> ReprVisitor {
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ReprVisitor { ptr: ptr, writer: writer }
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}
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impl ReprVisitor : MovePtr {
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#[inline(always)]
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fn move_ptr(adjustment: fn(*c_void) -> *c_void) {
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self.ptr = adjustment(self.ptr);
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}
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}
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impl ReprVisitor {
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// Various helpers for the TyVisitor impl
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#[inline(always)]
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fn get<T>(f: fn(&T)) -> bool {
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unsafe {
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f(transmute::<*c_void,&T>(copy self.ptr));
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}
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true
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}
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#[inline(always)]
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fn visit_inner(inner: *TyDesc) -> bool {
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self.visit_ptr_inner(self.ptr, inner)
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}
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#[inline(always)]
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fn visit_ptr_inner(ptr: *c_void, inner: *TyDesc) -> bool {
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let mut u = ReprVisitor(ptr, self.writer);
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let v = reflect::MovePtrAdaptor(move u);
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visit_tydesc(inner, (move v) as @TyVisitor);
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true
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}
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#[inline(always)]
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fn write<T:Repr>() -> bool {
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do self.get |v:&T| {
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v.write_repr(self.writer);
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}
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}
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fn write_escaped_slice(slice: &str) {
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self.writer.write_char('"');
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for str::chars_each(slice) |ch| {
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self.writer.write_escaped_char(ch);
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}
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self.writer.write_char('"');
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}
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fn write_mut_qualifier(mtbl: uint) {
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if mtbl == 0 {
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self.writer.write_str("mut ");
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} else if mtbl == 1 {
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// skip, this is ast::m_imm
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} else {
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assert mtbl == 2;
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self.writer.write_str("const ");
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}
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}
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fn write_vec_range(mtbl: uint, ptr: *u8, len: uint,
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inner: *TyDesc) -> bool {
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let mut p = ptr;
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let end = ptr::offset(p, len);
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let (sz, al) = unsafe { ((*inner).size, (*inner).align) };
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self.writer.write_char('[');
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let mut first = true;
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while p as uint < end as uint {
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if first {
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first = false;
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} else {
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self.writer.write_str(", ");
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}
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self.write_mut_qualifier(mtbl);
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self.visit_ptr_inner(p as *c_void, inner);
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p = align(ptr::offset(p, sz) as uint, al) as *u8;
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}
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self.writer.write_char(']');
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true
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}
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fn write_unboxed_vec_repr(mtbl: uint, v: &UnboxedVecRepr,
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inner: *TyDesc) -> bool {
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self.write_vec_range(mtbl, ptr::to_unsafe_ptr(&v.data),
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v.fill, inner)
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}
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}
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impl ReprVisitor : TyVisitor {
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fn visit_bot() -> bool {
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self.writer.write_str("!");
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true
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}
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fn visit_nil() -> bool { self.write::<()>() }
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fn visit_bool() -> bool { self.write::<bool>() }
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fn visit_int() -> bool { self.write::<int>() }
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fn visit_i8() -> bool { self.write::<i8>() }
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fn visit_i16() -> bool { self.write::<i16>() }
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fn visit_i32() -> bool { self.write::<i32>() }
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fn visit_i64() -> bool { self.write::<i64>() }
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fn visit_uint() -> bool { self.write::<uint>() }
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fn visit_u8() -> bool { self.write::<u8>() }
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fn visit_u16() -> bool { self.write::<u16>() }
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fn visit_u32() -> bool { self.write::<u32>() }
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fn visit_u64() -> bool { self.write::<u64>() }
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fn visit_float() -> bool { self.write::<float>() }
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fn visit_f32() -> bool { self.write::<f32>() }
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fn visit_f64() -> bool { self.write::<f64>() }
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fn visit_char() -> bool { self.write::<uint>() }
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// Type no longer exists, vestigial function.
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fn visit_str() -> bool { fail; }
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fn visit_estr_box() -> bool {
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do self.get::<@str> |s| {
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self.writer.write_char('@');
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self.write_escaped_slice(*s);
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}
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}
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fn visit_estr_uniq() -> bool {
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do self.get::<~str> |s| {
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self.writer.write_char('~');
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self.write_escaped_slice(*s);
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}
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}
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fn visit_estr_slice() -> bool {
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do self.get::<&str> |s| {
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self.write_escaped_slice(*s);
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}
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}
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// Type no longer exists, vestigial function.
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fn visit_estr_fixed(_n: uint, _sz: uint,
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_align: uint) -> bool { fail; }
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fn visit_box(mtbl: uint, inner: *TyDesc) -> bool {
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self.writer.write_char('@');
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self.write_mut_qualifier(mtbl);
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do self.get::<&managed::raw::BoxRepr> |b| {
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let p = ptr::to_unsafe_ptr(&b.data) as *c_void;
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self.visit_ptr_inner(p, inner);
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}
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}
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fn visit_uniq(mtbl: uint, inner: *TyDesc) -> bool {
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self.writer.write_char('~');
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self.write_mut_qualifier(mtbl);
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do self.get::<&managed::raw::BoxRepr> |b| {
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let p = ptr::to_unsafe_ptr(&b.data) as *c_void;
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self.visit_ptr_inner(p, inner);
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}
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}
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fn visit_ptr(_mtbl: uint, _inner: *TyDesc) -> bool {
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do self.get::<*c_void> |p| {
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self.writer.write_str(fmt!("(0x%x as *())",
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*p as uint));
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}
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}
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fn visit_rptr(mtbl: uint, inner: *TyDesc) -> bool {
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self.writer.write_char('&');
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self.write_mut_qualifier(mtbl);
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do self.get::<*c_void> |p| {
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self.visit_ptr_inner(*p, inner);
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}
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}
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// Type no longer exists, vestigial function.
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fn visit_vec(_mtbl: uint, _inner: *TyDesc) -> bool { fail; }
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fn visit_unboxed_vec(mtbl: uint, inner: *TyDesc) -> bool {
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do self.get::<vec::UnboxedVecRepr> |b| {
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self.write_unboxed_vec_repr(mtbl, b, inner);
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}
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}
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fn visit_evec_box(mtbl: uint, inner: *TyDesc) -> bool {
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do self.get::<&VecRepr> |b| {
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self.writer.write_char('@');
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self.write_unboxed_vec_repr(mtbl, &b.unboxed, inner);
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}
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}
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fn visit_evec_uniq(mtbl: uint, inner: *TyDesc) -> bool {
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do self.get::<&VecRepr> |b| {
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self.writer.write_char('~');
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self.write_unboxed_vec_repr(mtbl, &b.unboxed, inner);
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}
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}
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fn visit_evec_slice(mtbl: uint, inner: *TyDesc) -> bool {
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do self.get::<SliceRepr> |s| {
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self.writer.write_char('&');
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self.write_vec_range(mtbl, s.data, s.len, inner);
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}
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}
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fn visit_evec_fixed(_n: uint, sz: uint, _align: uint,
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mtbl: uint, inner: *TyDesc) -> bool {
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do self.get::<u8> |b| {
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self.write_vec_range(mtbl, ptr::to_unsafe_ptr(b), sz, inner);
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}
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}
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fn visit_enter_rec(_n_fields: uint,
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_sz: uint, _align: uint) -> bool {
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self.writer.write_char('{');
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true
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}
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fn visit_rec_field(i: uint, name: &str,
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mtbl: uint, inner: *TyDesc) -> bool {
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if i != 0 {
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self.writer.write_str(", ");
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}
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self.write_mut_qualifier(mtbl);
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self.writer.write_str(name);
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self.writer.write_str(": ");
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self.visit_inner(inner);
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true
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}
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fn visit_leave_rec(_n_fields: uint,
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_sz: uint, _align: uint) -> bool {
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self.writer.write_char('}');
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true
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}
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fn visit_enter_class(_n_fields: uint,
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_sz: uint, _align: uint) -> bool {
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self.writer.write_char('{');
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true
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}
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fn visit_class_field(i: uint, name: &str,
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mtbl: uint, inner: *TyDesc) -> bool {
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if i != 0 {
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self.writer.write_str(", ");
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}
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self.write_mut_qualifier(mtbl);
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self.writer.write_str(name);
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self.writer.write_str(": ");
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self.visit_inner(inner);
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true
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}
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fn visit_leave_class(_n_fields: uint,
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_sz: uint, _align: uint) -> bool {
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self.writer.write_char('}');
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true
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}
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fn visit_enter_tup(_n_fields: uint,
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_sz: uint, _align: uint) -> bool {
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self.writer.write_char('(');
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true
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}
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fn visit_tup_field(i: uint, inner: *TyDesc) -> bool {
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if i != 0 {
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self.writer.write_str(", ");
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}
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self.visit_inner(inner);
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true
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}
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fn visit_leave_tup(_n_fields: uint,
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_sz: uint, _align: uint) -> bool {
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self.writer.write_char(')');
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true
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}
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fn visit_enter_enum(_n_variants: uint,
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_sz: uint, _align: uint) -> bool {
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true
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}
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fn visit_enter_enum_variant(_variant: uint,
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_disr_val: int,
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_n_fields: uint,
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_name: &str) -> bool { true }
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fn visit_enum_variant_field(_i: uint, inner: *TyDesc) -> bool {
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self.visit_inner(inner)
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}
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fn visit_leave_enum_variant(_variant: uint,
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_disr_val: int,
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_n_fields: uint,
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_name: &str) -> bool { true }
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fn visit_leave_enum(_n_variants: uint,
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_sz: uint, _align: uint) -> bool { true }
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fn visit_enter_fn(_purity: uint, _proto: uint,
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_n_inputs: uint, _retstyle: uint) -> bool { true }
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fn visit_fn_input(_i: uint, _mode: uint, _inner: *TyDesc) -> bool { true }
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fn visit_fn_output(_retstyle: uint, _inner: *TyDesc) -> bool { true }
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fn visit_leave_fn(_purity: uint, _proto: uint,
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_n_inputs: uint, _retstyle: uint) -> bool { true }
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fn visit_trait() -> bool { true }
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fn visit_var() -> bool { true }
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fn visit_var_integral() -> bool { true }
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fn visit_param(_i: uint) -> bool { true }
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fn visit_self() -> bool { true }
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fn visit_type() -> bool { true }
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fn visit_opaque_box() -> bool {
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self.writer.write_char('@');
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do self.get::<&managed::raw::BoxRepr> |b| {
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let p = ptr::to_unsafe_ptr(&b.data) as *c_void;
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self.visit_ptr_inner(p, b.header.type_desc);
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}
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}
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// Type no longer exists, vestigial function.
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fn visit_constr(_inner: *TyDesc) -> bool { fail; }
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fn visit_closure_ptr(_ck: uint) -> bool { true }
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}
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pub fn write_repr2<T>(writer: @Writer, object: &T) {
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let ptr = ptr::to_unsafe_ptr(object) as *c_void;
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let tydesc = intrinsic::get_tydesc::<T>();
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let mut u = ReprVisitor(ptr, writer);
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let v = reflect::MovePtrAdaptor(move u);
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visit_tydesc(tydesc, (move v) as @TyVisitor)
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}
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#[test]
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fn test_repr2() {
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repr::write_repr2(io::stdout(), &10);
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io::println("");
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repr::write_repr2(io::stdout(), &true);
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io::println("");
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repr::write_repr2(io::stdout(), &false);
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io::println("");
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repr::write_repr2(io::stdout(), &1.234);
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io::println("");
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repr::write_repr2(io::stdout(), &(&"hello"));
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io::println("");
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repr::write_repr2(io::stdout(), &(@"hello"));
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io::println("");
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repr::write_repr2(io::stdout(), &(~"he\u10f3llo"));
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io::println("");
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repr::write_repr2(io::stdout(), &(@10));
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io::println("");
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repr::write_repr2(io::stdout(), &(@mut 10));
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io::println("");
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repr::write_repr2(io::stdout(), &(~10));
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io::println("");
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repr::write_repr2(io::stdout(), &(~mut 10));
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io::println("");
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repr::write_repr2(io::stdout(), &(&10));
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io::println("");
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let mut x = 10;
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repr::write_repr2(io::stdout(), &(&mut x));
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io::println("");
|
|
repr::write_repr2(io::stdout(), &(ptr::to_unsafe_ptr(&10) as *int));
|
|
io::println("");
|
|
repr::write_repr2(io::stdout(), &(@[1,2,3,4,5,6,7,8]));
|
|
io::println("");
|
|
repr::write_repr2(io::stdout(), &(@[1u8,2u8,3u8,4u8]));
|
|
io::println("");
|
|
repr::write_repr2(io::stdout(), &(@["hi", "there"]));
|
|
io::println("");
|
|
repr::write_repr2(io::stdout(), &(~["hi", "there"]));
|
|
io::println("");
|
|
repr::write_repr2(io::stdout(), &(&["hi", "there"]));
|
|
io::println("");
|
|
repr::write_repr2(io::stdout(), &({a:10, b:1.234}));
|
|
io::println("");
|
|
repr::write_repr2(io::stdout(), &(@{a:10, b:1.234}));
|
|
io::println("");
|
|
repr::write_repr2(io::stdout(), &(~{a:10, b:1.234}));
|
|
io::println("");
|
|
}
|
|
|
|
|
|
// Old non-factored implementation, transitional...
|
|
|
|
enum EnumVisitState {
|
|
PreVariant, // We're before the variant we're interested in.
|
|
InVariant, // We're inside the variant we're interested in.
|
|
PostVariant, // We're after the variant we're interested in.
|
|
Degenerate // This is a degenerate enum (exactly 1 variant)
|
|
}
|
|
|
|
impl EnumVisitState : cmp::Eq {
|
|
pure fn eq(&self, other: &EnumVisitState) -> bool {
|
|
((*self) as uint) == ((*other) as uint)
|
|
}
|
|
pure fn ne(&self, other: &EnumVisitState) -> bool { !(*self).eq(other) }
|
|
}
|
|
|
|
struct EnumState {
|
|
end_ptr: *c_void,
|
|
state: EnumVisitState
|
|
}
|
|
|
|
/// XXX: This should not use a boxed writer!
|
|
struct ReprPrinter {
|
|
mut ptr: *c_void,
|
|
writer: @Writer, // XXX: This should not use a boxed trait.
|
|
enum_stack: DVec<EnumState>
|
|
}
|
|
|
|
/// FIXME (issue #3462): This is horrible.
|
|
struct ReprPrinterWrapper {
|
|
printer: @ReprPrinter
|
|
}
|
|
|
|
impl ReprPrinter {
|
|
#[inline(always)]
|
|
fn align(n: uint) {
|
|
unsafe {
|
|
self.ptr = transmute(align(self.ptr as uint, n));
|
|
}
|
|
}
|
|
|
|
#[inline(always)]
|
|
fn bump(n: uint) {
|
|
unsafe {
|
|
self.ptr = transmute(self.ptr as uint + n);
|
|
}
|
|
}
|
|
|
|
#[inline(always)]
|
|
fn log_simple<T:Repr>() -> bool {
|
|
unsafe {
|
|
self.align(sys::min_align_of::<T>());
|
|
let value_addr: &T = transmute(copy self.ptr);
|
|
value_addr.write_repr(self.writer);
|
|
self.bump(sys::size_of::<T>());
|
|
true
|
|
}
|
|
}
|
|
}
|
|
|
|
impl ReprPrinterWrapper {
|
|
fn visit_estr() -> bool {
|
|
unsafe {
|
|
self.printer.writer.write_char('"');
|
|
let vec_repr_ptr: **VecRepr = transmute(copy self.printer.ptr);
|
|
let vec_repr = *vec_repr_ptr;
|
|
let data_ptr = ptr::to_unsafe_ptr(&(*vec_repr).unboxed.data);
|
|
let slice: &str = transmute((data_ptr, (*vec_repr).unboxed.fill));
|
|
for str::chars_each(slice) |ch| {
|
|
self.printer.writer.write_escaped_char(ch);
|
|
}
|
|
self.printer.writer.write_char('"');
|
|
let ptr_size = sys::size_of::<*c_void>();
|
|
self.printer.ptr = transmute(self.printer.ptr as uint + ptr_size);
|
|
true
|
|
}
|
|
}
|
|
|
|
fn visit_self_describing_heap_alloc(mtbl: uint) -> bool {
|
|
unsafe {
|
|
if mtbl != 1 { self.printer.writer.write_str("mut "); }
|
|
let box_ptr: **BoxRepr = transmute(copy self.printer.ptr);
|
|
let box = *box_ptr;
|
|
self.printer.ptr = transmute(&(*box).data);
|
|
intrinsic::visit_tydesc((*box).header.type_desc,
|
|
self as @TyVisitor);
|
|
let box_size = sys::size_of::<*BoxRepr>();
|
|
self.printer.ptr = transmute(box_ptr as uint + box_size);
|
|
true
|
|
}
|
|
}
|
|
|
|
fn visit_ptr_contents(mtbl: uint, inner: *TyDesc) -> bool {
|
|
unsafe {
|
|
if mtbl != 1 { self.printer.writer.write_str("mut "); }
|
|
let data_ptr: **c_void = transmute(copy self.printer.ptr);
|
|
if *data_ptr == ptr::null() {
|
|
self.printer.writer.write_str("null");
|
|
} else {
|
|
self.printer.ptr = *data_ptr;
|
|
intrinsic::visit_tydesc(inner, self as @TyVisitor);
|
|
}
|
|
let ptr_size = sys::size_of::<*c_void>();
|
|
self.printer.ptr = transmute(data_ptr as uint + ptr_size);
|
|
true
|
|
}
|
|
}
|
|
|
|
fn visit_evec(mtbl: uint, inner: *TyDesc) -> bool {
|
|
unsafe {
|
|
self.printer.writer.write_char('[');
|
|
self.printer.align(sys::min_align_of::<*c_void>());
|
|
let vec_repr_ptr: **VecRepr = transmute(copy self.printer.ptr);
|
|
let old_ptr = self.printer.ptr as uint;
|
|
let vec_repr: *VecRepr = *vec_repr_ptr;
|
|
self.printer.ptr = transmute(&(*vec_repr).unboxed.data);
|
|
let end_ptr: *c_void = transmute(self.printer.ptr as uint +
|
|
(*vec_repr).unboxed.fill);
|
|
let sys_tydesc: *TypeDesc = transmute(copy inner);
|
|
let alignment = (*sys_tydesc).align;
|
|
let mut first = true;
|
|
loop {
|
|
self.printer.align(alignment);
|
|
if self.printer.ptr >= end_ptr { break; }
|
|
if first {
|
|
self.printer.writer.write_char(' ');
|
|
if mtbl != 1 { self.printer.writer.write_str("mut "); }
|
|
} else {
|
|
self.printer.writer.write_str(", ");
|
|
}
|
|
intrinsic::visit_tydesc(inner, self as @TyVisitor);
|
|
first = false;
|
|
}
|
|
if !first {
|
|
self.printer.writer.write_char(' ');
|
|
} else if mtbl != 1 {
|
|
self.printer.writer.write_str("mut");
|
|
}
|
|
self.printer.writer.write_char(']');
|
|
self.printer.ptr = transmute(old_ptr + sys::size_of::<int>());
|
|
true
|
|
}
|
|
}
|
|
}
|
|
|
|
impl ReprPrinterWrapper : TyVisitor {
|
|
fn visit_bot() -> bool {
|
|
self.printer.bump(1);
|
|
self.printer.writer.write_str("fail");
|
|
true
|
|
}
|
|
|
|
fn visit_nil() -> bool { self.printer.log_simple::<()>() }
|
|
fn visit_bool() -> bool { self.printer.log_simple::<bool>() }
|
|
|
|
// Numbers
|
|
|
|
fn visit_int() -> bool { self.printer.log_simple::<int>() }
|
|
fn visit_i8() -> bool { self.printer.log_simple::<i8>() }
|
|
fn visit_i16() -> bool { self.printer.log_simple::<i16>() }
|
|
fn visit_i32() -> bool { self.printer.log_simple::<i32>() }
|
|
fn visit_i64() -> bool { self.printer.log_simple::<i64>() }
|
|
|
|
fn visit_uint() -> bool { self.printer.log_simple::<uint>() }
|
|
fn visit_u8() -> bool { self.printer.log_simple::<u8>() }
|
|
fn visit_u16() -> bool { self.printer.log_simple::<u16>() }
|
|
fn visit_u32() -> bool { self.printer.log_simple::<u32>() }
|
|
fn visit_u64() -> bool { self.printer.log_simple::<u64>() }
|
|
|
|
fn visit_float() -> bool { self.printer.log_simple::<float>() }
|
|
fn visit_f32() -> bool { self.printer.log_simple::<f32>() }
|
|
fn visit_f64() -> bool { self.printer.log_simple::<f64>() }
|
|
|
|
fn visit_char() -> bool { self.printer.log_simple::<char>() }
|
|
fn visit_str() -> bool { true }
|
|
|
|
// Strings
|
|
|
|
fn visit_estr_box() -> bool {
|
|
self.printer.writer.write_char('@');
|
|
self.visit_estr()
|
|
}
|
|
fn visit_estr_uniq() -> bool {
|
|
self.printer.writer.write_char('~');
|
|
self.visit_estr()
|
|
}
|
|
fn visit_estr_slice() -> bool {
|
|
unsafe {
|
|
self.printer.writer.write_char('"');
|
|
let slice_ptr: *&str = transmute(copy self.printer.ptr);
|
|
let slice = *slice_ptr;
|
|
for str::chars_each(slice) |ch| {
|
|
self.printer.writer.write_escaped_char(ch);
|
|
}
|
|
self.printer.writer.write_char('"');
|
|
let slice_sz = sys::size_of::<(*char,uint)>();
|
|
self.printer.ptr = transmute(self.printer.ptr as uint + slice_sz);
|
|
true
|
|
}
|
|
}
|
|
fn visit_estr_fixed(_n: uint, _sz: uint, _align: uint) -> bool { true }
|
|
|
|
// Pointers
|
|
|
|
fn visit_box(mtbl: uint, _inner: *TyDesc) -> bool {
|
|
self.printer.writer.write_char('@');
|
|
self.visit_self_describing_heap_alloc(mtbl)
|
|
}
|
|
fn visit_uniq(mtbl: uint, _inner: *TyDesc) -> bool {
|
|
self.printer.writer.write_char('~');
|
|
self.visit_self_describing_heap_alloc(mtbl)
|
|
}
|
|
fn visit_ptr(mtbl: uint, inner: *TyDesc) -> bool {
|
|
self.printer.writer.write_char('*');
|
|
self.visit_ptr_contents(mtbl, inner)
|
|
}
|
|
fn visit_rptr(mtbl: uint, inner: *TyDesc) -> bool {
|
|
self.printer.writer.write_char('&');
|
|
self.visit_ptr_contents(mtbl, inner)
|
|
}
|
|
|
|
// Vectors
|
|
|
|
fn visit_vec(_mtbl: uint, _inner: *TyDesc) -> bool { true }
|
|
fn visit_unboxed_vec(_mtbl: uint, _inner: *TyDesc) -> bool { true }
|
|
fn visit_evec_box(mtbl: uint, inner: *TyDesc) -> bool {
|
|
self.printer.writer.write_char('@');
|
|
self.visit_evec(mtbl, inner)
|
|
}
|
|
fn visit_evec_uniq(mtbl: uint, inner: *TyDesc) -> bool {
|
|
self.printer.writer.write_char('~');
|
|
self.visit_evec(mtbl, inner)
|
|
}
|
|
fn visit_evec_slice(mtbl: uint, inner: *TyDesc) -> bool {
|
|
unsafe {
|
|
self.printer.writer.write_str("&[");
|
|
self.printer.align(sys::min_align_of::<(*c_void,uint)>());
|
|
let slice_ptr: *(*c_void,uint) = transmute(copy self.printer.ptr);
|
|
let (data, fill) = *slice_ptr;
|
|
self.printer.ptr = data;
|
|
let end_ptr: *c_void = transmute(self.printer.ptr as uint + fill);
|
|
let sys_tydesc: *TypeDesc = transmute(copy inner);
|
|
let alignment = (*sys_tydesc).align;
|
|
let mut first = true;
|
|
loop {
|
|
self.printer.align(alignment);
|
|
if self.printer.ptr >= end_ptr { break; }
|
|
if first {
|
|
self.printer.writer.write_char(' ');
|
|
if mtbl != 1 { self.printer.writer.write_str("mut "); }
|
|
} else {
|
|
self.printer.writer.write_str(", ");
|
|
}
|
|
intrinsic::visit_tydesc(inner, self as @TyVisitor);
|
|
first = false;
|
|
}
|
|
if !first {
|
|
self.printer.writer.write_char(' ');
|
|
} else if mtbl != 1 {
|
|
self.printer.writer.write_str("mut");
|
|
}
|
|
self.printer.writer.write_char(']');
|
|
let slice_size = sys::size_of::<(uint, *c_void)>();
|
|
self.printer.ptr = transmute(slice_ptr as uint + slice_size);
|
|
true
|
|
}
|
|
}
|
|
fn visit_evec_fixed(n: uint, sz: uint, align: uint, mtbl: uint,
|
|
inner: *TyDesc) -> bool {
|
|
unsafe {
|
|
self.printer.writer.write_char('[');
|
|
self.printer.align(align);
|
|
let end_ptr: *c_void = transmute(self.printer.ptr as uint + sz);
|
|
for uint::range(0, n) |i| {
|
|
self.printer.align(align);
|
|
if i == 0 {
|
|
self.printer.writer.write_char(' ');
|
|
if mtbl != 1 { self.printer.writer.write_str("mut "); }
|
|
} else {
|
|
self.printer.writer.write_str(", ");
|
|
}
|
|
intrinsic::visit_tydesc(inner, self as @TyVisitor);
|
|
}
|
|
if n > 0 {
|
|
self.printer.writer.write_char(' ');
|
|
} else if mtbl != 1 {
|
|
self.printer.writer.write_str("mut");
|
|
}
|
|
self.printer.writer.write_char(']');
|
|
self.printer.ptr = end_ptr;
|
|
true
|
|
}
|
|
}
|
|
|
|
// Records
|
|
|
|
fn visit_enter_rec(_n_fields: uint, _sz: uint, align: uint) -> bool {
|
|
self.printer.writer.write_char('{');
|
|
self.printer.align(align);
|
|
true
|
|
}
|
|
fn visit_rec_field(i: uint, name: &str, mtbl: uint, inner: *TyDesc) ->
|
|
bool {
|
|
if i != 0 {
|
|
self.printer.writer.write_str(", ");
|
|
} else {
|
|
self.printer.writer.write_char(' ');
|
|
}
|
|
if mtbl != 1 { self.printer.writer.write_str("mut "); }
|
|
self.printer.writer.write_str(name);
|
|
self.printer.writer.write_str(": ");
|
|
intrinsic::visit_tydesc(inner, self as @TyVisitor);
|
|
true
|
|
}
|
|
fn visit_leave_rec(n_fields: uint, _sz: uint, _align: uint) -> bool {
|
|
if n_fields > 0 { self.printer.writer.write_char(' '); }
|
|
self.printer.writer.write_char('}');
|
|
true
|
|
}
|
|
|
|
// Structs
|
|
|
|
fn visit_enter_class(_n_fields: uint, _sz: uint, align: uint) -> bool {
|
|
self.printer.writer.write_char('{');
|
|
self.printer.align(align);
|
|
true
|
|
}
|
|
fn visit_class_field(i: uint, name: &str, mtbl: uint, inner: *TyDesc) ->
|
|
bool {
|
|
if i != 0 {
|
|
self.printer.writer.write_str(", ");
|
|
} else {
|
|
self.printer.writer.write_char(' ');
|
|
}
|
|
if mtbl != 1 { self.printer.writer.write_str("mut "); }
|
|
self.printer.writer.write_str(name);
|
|
self.printer.writer.write_str(": ");
|
|
intrinsic::visit_tydesc(inner, self as @TyVisitor);
|
|
true
|
|
}
|
|
fn visit_leave_class(n_fields: uint, _sz: uint, _align: uint) -> bool {
|
|
if n_fields > 0 { self.printer.writer.write_char(' '); }
|
|
self.printer.writer.write_char('}');
|
|
true
|
|
}
|
|
|
|
// Tuples
|
|
|
|
fn visit_enter_tup(_n_fields: uint, _sz: uint, align: uint) -> bool {
|
|
self.printer.writer.write_char('(');
|
|
self.printer.align(align);
|
|
true
|
|
}
|
|
fn visit_tup_field(i: uint, inner: *TyDesc) -> bool {
|
|
if i != 0 { self.printer.writer.write_str(", "); }
|
|
intrinsic::visit_tydesc(inner, self as @TyVisitor);
|
|
true
|
|
}
|
|
fn visit_leave_tup(_n_fields: uint, _sz: uint, _align: uint) -> bool {
|
|
self.printer.writer.write_char(')');
|
|
true
|
|
}
|
|
|
|
// Enums
|
|
|
|
fn visit_enter_enum(n_variants: uint, sz: uint, align: uint) -> bool {
|
|
unsafe {
|
|
self.printer.align(align);
|
|
|
|
// Write in the location of the end of this enum.
|
|
let end_ptr = transmute(self.printer.ptr as uint + sz);
|
|
let state = if n_variants == 1 { Degenerate } else { PreVariant };
|
|
let new_state = EnumState { end_ptr: end_ptr, state: state };
|
|
self.printer.enum_stack.push(new_state);
|
|
|
|
true
|
|
}
|
|
}
|
|
|
|
fn visit_enter_enum_variant(_variant: uint,
|
|
disr_val: int,
|
|
_n_fields: uint,
|
|
name: &str) -> bool {
|
|
unsafe {
|
|
let stack = &self.printer.enum_stack;
|
|
let mut enum_state = stack.last();
|
|
match enum_state.state {
|
|
PreVariant => {
|
|
let disr_ptr = self.printer.ptr as *int;
|
|
if *disr_ptr == disr_val {
|
|
enum_state.state = InVariant;
|
|
self.printer.writer.write_str(name);
|
|
self.printer.bump(sys::size_of::<int>());
|
|
stack.set_elt(stack.len() - 1, enum_state);
|
|
}
|
|
}
|
|
Degenerate => {
|
|
self.printer.writer.write_str(name);
|
|
}
|
|
InVariant | PostVariant => {}
|
|
}
|
|
true
|
|
}
|
|
}
|
|
|
|
fn visit_enum_variant_field(i: uint, inner: *TyDesc) -> bool {
|
|
match self.printer.enum_stack.last().state {
|
|
InVariant | Degenerate => {
|
|
if i == 0 {
|
|
self.printer.writer.write_char('(');
|
|
} else {
|
|
self.printer.writer.write_str(", ");
|
|
}
|
|
|
|
intrinsic::visit_tydesc(inner, self as @TyVisitor);
|
|
}
|
|
PreVariant | PostVariant => {}
|
|
}
|
|
true
|
|
}
|
|
|
|
fn visit_leave_enum_variant(_variant: uint,
|
|
_disr_val: int,
|
|
n_fields: uint,
|
|
_name: &str) -> bool {
|
|
let stack = &self.printer.enum_stack;
|
|
let mut enum_state = stack.last();
|
|
match enum_state.state {
|
|
InVariant => {
|
|
if n_fields >= 1 { self.printer.writer.write_char(')'); }
|
|
enum_state.state = PostVariant;
|
|
stack.set_elt(stack.len() - 1, enum_state);
|
|
}
|
|
Degenerate => {
|
|
if n_fields >= 1 { self.printer.writer.write_char(')'); }
|
|
}
|
|
PreVariant | PostVariant => {}
|
|
}
|
|
true
|
|
}
|
|
|
|
fn visit_leave_enum(_n_variants: uint, _sz: uint, _align: uint) -> bool {
|
|
self.printer.ptr = self.printer.enum_stack.pop().end_ptr;
|
|
true
|
|
}
|
|
|
|
// Functions
|
|
|
|
fn visit_enter_fn(_purity: uint, proto: uint,
|
|
_n_inputs: uint, _retstyle: uint) -> bool {
|
|
self.printer.align(sys::min_align_of::<(uint,uint)>());
|
|
match proto {
|
|
2u => self.printer.writer.write_char('~'),
|
|
3u => self.printer.writer.write_char('@'),
|
|
4u => self.printer.writer.write_char('&'),
|
|
_ => {}
|
|
}
|
|
self.printer.writer.write_str("fn");
|
|
true
|
|
}
|
|
|
|
fn visit_fn_input(_i: uint, _mode: uint, _inner: *TyDesc) -> bool { true }
|
|
fn visit_fn_output(_retstyle: uint, _inner: *TyDesc) -> bool { true }
|
|
fn visit_leave_fn(_purity: uint, _proto: uint,
|
|
_n_inputs: uint, _retstyle: uint) -> bool { true }
|
|
|
|
// Others
|
|
|
|
fn visit_trait() -> bool { self.printer.writer.write_str("@trait"); true }
|
|
fn visit_var() -> bool { true }
|
|
fn visit_var_integral() -> bool { true }
|
|
fn visit_param(_i: uint) -> bool { true }
|
|
fn visit_self() -> bool { true }
|
|
fn visit_type() -> bool { true }
|
|
fn visit_opaque_box() -> bool {
|
|
self.printer.writer.write_char('@');
|
|
self.visit_self_describing_heap_alloc(1)
|
|
}
|
|
fn visit_constr(_inner: *TyDesc) -> bool { true }
|
|
fn visit_closure_ptr(_ck: uint) -> bool { true }
|
|
}
|
|
|
|
pub fn write_repr<T>(writer: @Writer, object: &T) {
|
|
unsafe {
|
|
let ptr = ptr::to_unsafe_ptr(object) as *c_void;
|
|
let tydesc = sys::get_type_desc::<T>();
|
|
let tydesc = cast::transmute(move tydesc);
|
|
|
|
let repr_printer = @ReprPrinter {
|
|
ptr: ptr,
|
|
writer: writer,
|
|
enum_stack: DVec()
|
|
};
|
|
|
|
let wrapper = ReprPrinterWrapper { printer: repr_printer };
|
|
intrinsic::visit_tydesc(tydesc, wrapper as @TyVisitor);
|
|
}
|
|
}
|
|
|