Module rust_2021

The 2021 version of the core prelude.

See the module-level documentation for more.

Macros

• assert
  Asserts that a boolean expression is true at runtime.
• cfg
  Evaluates boolean combinations of configuration flags at compile-time.
• column
  Expands to the column number at which it was invoked.
• compile_error
  Causes compilation to fail with the given error message when encountered.
• concat
  Concatenates literals into a static string slice.
• env
  Inspects an environment variable at compile time.
• file
  Expands to the file name in which it was invoked.
• format_args
  Constructs parameters for the other string-formatting macros.
• include
  Parses a file as an expression or an item according to the context.
• include_bytes
  Includes a file as a reference to a byte array.
• include_str
  Includes a UTF-8 encoded file as a string.
• line
  Expands to the line number on which it was invoked.
• module_path
  Expands to a string that represents the current module path.