dumping with macro
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@ -1,6 +1,4 @@
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use std::any::{TypeId, type_name};
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use std::any::{TypeId, type_name};
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use std::mem::*;
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use std::fmt::Debug;
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//* # See what's behind the primitive datatypes of Rust
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//* # See what's behind the primitive datatypes of Rust
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//*
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//*
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//* This Crate shows off, how primitive Types of rust are stored in memory.
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//* This Crate shows off, how primitive Types of rust are stored in memory.
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@ -9,23 +7,34 @@ fn main() {
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let mut items = Vec::new();
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let mut items = Vec::new();
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items.push(true);
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items.push(true);
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items.push(false);
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items.push(false);
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dump_type::<bool>(items);
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investigate!(bool, items);
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let mut items = Vec::new();
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items.push(String::from("foo"));
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items.push(String::from("bar"));
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items.push(String::from("文学"));
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investigate!(String, items);
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}
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}
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fn dump_type<T: Debug + 'static>(items: Vec<T>) {
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#[macro_export]
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println!("Type:\t{}", type_name::<T>());
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macro_rules! investigate {
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println!("\tID:\t{:?}", TypeId::of::<T>());
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($t:ty, $v:tt) => {
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println!("\tItems:");
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println!("Type:\t{}", type_name::<$t>());
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unsafe {
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println!("\tID:\t{:?}", TypeId::of::<$t>());
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for (index, item) in items.iter().enumerate() {
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println!("\tItems:");
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let pointer = item as *const T;
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unsafe {
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let raw_pointer = pointer as *const u8;
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for (index, item) in $v.iter().enumerate() {
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println!("\t{index:02x}\titem:\t{item:?}\n\
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let pointer = item as *const $t;
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\t\tpointer: {:X?}\n\
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let raw_pointer: [u8; std::mem::size_of::<$t>()] = std::mem::transmute(item.clone());
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\t\tmemory: {:X?}",
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println!("\t{index:02x}\titem:\t{item:?}\n\
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pointer,
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\t\tpointer: {:X?}\n\
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*raw_pointer,
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\t\talign: {:#X} B\n\
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);
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\t\tmemory: {:X?}\n",
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pointer,
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std::mem::align_of::<$t>(),
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raw_pointer,
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);
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}
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}
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}
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}
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};
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}
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}
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