microsoft/qdk
Publicmirrored fromhttps://github.com/microsoft/qdkAvailable
compiler/qsc_data_structures/src/language_features.rs
50lines · modecode
| 1 | // Copyright (c) Microsoft Corporation. |
| 2 | // Licensed under the MIT License. |
| 3 | |
| 4 | use bitflags::bitflags; |
| 5 | use serde::Deserialize; |
| 6 | |
| 7 | #[derive(Deserialize, Clone, Debug, PartialOrd, Ord, PartialEq, Eq, Copy)] |
| 8 | pub struct LanguageFeatures(u8); |
| 9 | |
| 10 | bitflags! { |
| 11 | impl LanguageFeatures: u8 { |
| 12 | const V2PreviewSyntax = 0b1; |
| 13 | } |
| 14 | } |
| 15 | |
| 16 | impl LanguageFeatures { |
| 17 | pub fn merge(&mut self, other: impl Into<LanguageFeatures>) { |
| 18 | self.0 |= other.into().0; |
| 19 | } |
| 20 | } |
| 21 | |
| 22 | impl Default for LanguageFeatures { |
| 23 | fn default() -> Self { |
| 24 | LanguageFeatures::empty() |
| 25 | } |
| 26 | } |
| 27 | |
| 28 | impl<I> FromIterator<I> for LanguageFeatures |
| 29 | where |
| 30 | I: AsRef<str>, |
| 31 | { |
| 32 | fn from_iter<T: IntoIterator<Item = I>>(iter: T) -> Self { |
| 33 | iter.into_iter().fold(LanguageFeatures::empty(), |acc, x| { |
| 34 | acc | match x.as_ref() { |
| 35 | "v2-preview-syntax" => LanguageFeatures::V2PreviewSyntax, |
| 36 | _ => LanguageFeatures::empty(), |
| 37 | } |
| 38 | }) |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | impl From<LanguageFeatures> for Vec<String> { |
| 43 | fn from(features: LanguageFeatures) -> Self { |
| 44 | let mut result = Vec::new(); |
| 45 | if features.contains(LanguageFeatures::V2PreviewSyntax) { |
| 46 | result.push("v2-preview-syntax".to_string()); |
| 47 | } |
| 48 | result |
| 49 | } |
| 50 | } |
| 51 | |