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let langserver: ExampleLanguageServer | null = null;

export const activate = function() {
    langserver = new ExampleLanguageServer();
}

export const deactivate = function() {
        if (langserver) {
            langserver.stop();
            langserver = null;

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{-# LANGUAGE GADTs #-}
{-# LANGUAGE KindSignatures #-}
{-# LANGUAGE MultiParamTypeClasses #-}

module Main where

class Monad m => Handler (g :: * -> *) (m :: * -> *) where
    handle :: g a -> (a -> m b) -> m b
    
data Freer :: (* -> *) -> * -> * where

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/// ref: [zhihu](https://zhuanlan.zhihu.com/p/378252833)
use crate::foo::{IncreaseOnly, new_increase_only};

fn main() {
    let mut x1 = new_increase_only!(0);
    let mut x2 = new_increase_only!(2);
    let y = 1;

    // only can be used in `x1`
    let le = x1.check_less_or_equal(y).unwrap();

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package org.example;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonSubTypes;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.annotation.JsonTypeName;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.Builder;
import lombok.SneakyThrows;
import lombok.Value;