Items available everywhere without having to use them
This file is the similar to the Rust's "prelude", items defined here are available in the root lexical-scope, so they are available everywhere (but can be shadowed by local definitions).
In general, prelude should only contain use aliases to items defined elsewhere.
Builtin types
Unit type (
())
Boolean type
8-bit unsigned integer (byte)
16-bit unsigned integer
32-bit unsigned integer
64-bit unsigned integer
128-bit unsigned integer
Native unsigned integer (machine word)
Signed 8-bit integer
Signed 16-bit integer
Signed 32-bit integer
Signed 64-bit integer
Signed 128-bit integer
Native signed integer (machine word)
Single precision floating point type
Double precision floating point type
Structs
A placeholder for the
Self type in the protocol of a dyn object.
Either a success value or an error value.
Optional value
Macros
Prints a formatted string to standard output.
Ungracefully terminate the thread or process with an error message.
Prints a formatted string to standard output with newline.
Causes the compilation to fail if reached.
Prints a formatted string to standard error.
Extract the success value or short-circuit the calling function.
Prints a formatted string to standard error with newline.
Panics if
cond evaluates to false.
Panics if
lhs and rhs are not equal.
Panics if
lhs and rhs are equal.
Treats the location as unreachable during program flow.
A helper for printing a value of a subexpression for debugging purposes.