[−][src]Crate proc_macro_error

Re-exports

pub extern crate proc_macro;

pub extern crate proc_macro2;

call_site_error	Shortcut for `span_error!(Span::call_site(), msg...)`. This macro is still preferable over plain panic, see Motivation
filter_macro_errors	This macro is supposed to be used at the top level of your `proc-macro`, the function marked with a `#[proc_macro*]` attribute. It catches all the errors triggered by `span_error!`, `call_site_error!`, and `trigger_error`. Once caught, it converts it to a `proc_macro::TokenStream` containing a `compile_error!` invocation.
span_error	Makes a `MacroError` instance from provided arguments (`panic!`-like) and triggers panic in hope it will be caught by `filter_macro_errors!`.

An error in a proc-macro. This struct preserves the given span so rustc can highlight the exact place in user code responsible for the error.

OptionExt	This traits expands `Option<T>` with some handy shortcuts.
ResultExt	This traits expands `Result<T, Into<MacroError>>` with some handy shortcuts.

filter_macro_error_panics	Execute the closure and catch all the panics triggered by `trigger_error`, converting them to `proc_macro::TokenStream`. All the other panics will be passed through as is.
trigger_error	Trigger error, aborting the proc-macro's execution.