micro-tower-codegen 0.1.0

micro-tower proc-macros and attributes for code generation
Documentation 
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use proc_macro::{Diagnostic, Level};
use quote::__private::Span;

/// Generate compile error which is associated with `span` and contains the message `msg`.
pub fn emit_error(span: Span, msg: impl Into<String>) {
    Diagnostic::spanned(vec![span.unwrap()], Level::Error, msg).emit();
}