slicec 0.3.3

The Slice parser and other core components for Slice compilers.
Documentation 
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// Copyright (c) ZeroC, Inc.

mod allow;
mod compress;
mod deprecated;
mod oneway;
mod sliced_format;

pub use allow::*;
pub use compress::*;
pub use deprecated::*;
pub use oneway::*;
pub use sliced_format::*;

use super::Attributables;
use crate::diagnostics::{Diagnostic, Diagnostics, Error, Lint};
use crate::slice_file::Span;
use crate::utils::attribute_parsing_util::*;

pub trait AttributeKind: std::fmt::Debug {
    fn is_repeatable(&self) -> bool;
    fn validate_on(&self, applied_on: Attributables, span: &Span, diagnostics: &mut Diagnostics);
    fn as_any(&self) -> &dyn std::any::Any;
    fn directive(&self) -> &str;
}

#[macro_export] // We export this macro so languages can implement their own attributes.
macro_rules! implement_attribute_kind_for {
    ($type:ty, $directive:literal, $is_repeatable:literal) => {
        impl $type {
            pub fn directive() -> &'static str {
                $directive
            }
        }

        impl AttributeKind for $type {
            fn is_repeatable(&self) -> bool {
                $is_repeatable
            }

            fn validate_on(&self, applied_on: Attributables, span: &Span, diagnostics: &mut Diagnostics) {
                Self::validate_on(&self, applied_on, span, diagnostics);
            }

            fn as_any(&self) -> &dyn std::any::Any {
                self
            }

            fn directive(&self) -> &str {
                Self::directive()
            }
        }
    };
}

pub use implement_attribute_kind_for;

#[derive(Debug)]
pub struct Unparsed {
    pub directive: String,
    pub args: Vec<String>,
}

impl AttributeKind for Unparsed {
    fn is_repeatable(&self) -> bool {
        true
    }

    // We perform no additional validation for unparsed attributes.
    fn validate_on(&self, _: Attributables, _: &Span, _: &mut Diagnostics) {}

    fn as_any(&self) -> &dyn std::any::Any {
        self
    }

    fn directive(&self) -> &str {
        &self.directive
    }
}