compiler-errors

问题 I am getting the following error when attempting to run sbt run to run my Scala code: insecure HTTP request is unsupported 'http://repo.typesafe.com/typesafe/releases'; switch to HTTPS or opt-in as ("typesafe-releases" at "http://repo.typesafe.com/typesafe/releases").withAllowInsecureProtocol(true), or by using allowInsecureProtocol in repositories file This is strange because it was working perfectly fine last week and I have changed nothing in the code. I have tried adding ("typesafe

问题 Hey so I'm working to attach a piece of hardware into a setup controlled with MATLAB. I've written a set of functions (tried both C and C++) that utilize this hardware to perform simple tasks. The code compiles just fine using cl. When I try to compile with mex however, it cannot seem to link symbols from my includes (am using the -I flag pointing to directory of my header files). Any thoughts? CL Output: >cl isConnected.c *.lib Microsoft (R) C/C++ Optimizing Compiler Version 19.28.29334 for

问题 I need a struct that contains a trait object and more of itself. Disappointedly the following code does not compile: trait Foo {} struct Bar<T: Foo> { bars: Vec<Box<Bar<dyn Foo>>>, foo: T, } I managed to coerce this into compiling by adding the ?Sized bound to T , but I do not understand why this should be the case. I assume this is because all trait objects have the same size, but the size of Bar depends on the size of the concrete type T . If so, how is Bar with an unsized T represented in

问题 I'm creating a few tables in pgAdmin 4, but I keep getting the error it the title for some reason, can you spot why? I don't see any problem and i've looked into other code samples similar to mine which compiled perfectely. It also runs OK in IDEone (http://ideone.com/ZBn2Nr). thanks! Create table item (iname varchar(30) primary key, itype varchar(30)); Create table Cafe (license numeric(5,0) primary key, cname varchar(30), address varchar(30)); Create table Client (cid numeric(5,0) primary

问题 I'm trying to use some curl code to test the lib but I can't compile it :( I'm using Clion (Cmake + gcc) and I've got a libcurl.a, a libcurl.dll and a libcurl.dlla What am I suppose to do with those 3 files ? This is my CmakeLists.txt : cmake_minimum_required(VERSION 3.10) project(curl_test2 C) set(CMAKE_C_STANDARD 99) ADD_DEFINITIONS( -DCURL_STATICLIB ) include_directories( "include" ) set(SRCS" srcs/main.c") set(HEADERS "include/curl/curl.h" "include/curl/easy.h") link_directories("lib")

问题 I'm trying to use some curl code to test the lib but I can't compile it :( I'm using Clion (Cmake + gcc) and I've got a libcurl.a, a libcurl.dll and a libcurl.dlla What am I suppose to do with those 3 files ? This is my CmakeLists.txt : cmake_minimum_required(VERSION 3.10) project(curl_test2 C) set(CMAKE_C_STANDARD 99) ADD_DEFINITIONS( -DCURL_STATICLIB ) include_directories( "include" ) set(SRCS" srcs/main.c") set(HEADERS "include/curl/curl.h" "include/curl/easy.h") link_directories("lib")

问题 This really shouldn't be so difficult to find an answer to, but alas I don't... I want to delay the next execution step in a do block. I have found the functions delay , sleep , nanosleep and usleep . And also this question, that doesn't cover how to use any of these, however: Sleep in Haskell. I am getting the same error for all of these, so probably I am doing something wrong fundamentally: Variable not in scope: delay :: Integer -> IO a0 This is my test snippet: main = do { putStrLn "line

问题 This really shouldn't be so difficult to find an answer to, but alas I don't... I want to delay the next execution step in a do block. I have found the functions delay , sleep , nanosleep and usleep . And also this question, that doesn't cover how to use any of these, however: Sleep in Haskell. I am getting the same error for all of these, so probably I am doing something wrong fundamentally: Variable not in scope: delay :: Integer -> IO a0 This is my test snippet: main = do { putStrLn "line

问题 This question already has an answer here : Conversion from string literal to char* is deprecated (1 answer) Closed 2 years ago . I recently installed VS 2017, and have ran into a weird sort of issue. Basically, I cannot use hard-coded strings without explicitly casting them to (char*). If I said something like Function("test") , it would simply throw an error stating that const char* is incompatible with char*. I really don't want to stick with VS 2015 :(. Anybody know how to make VS

问题 While working in Swift project, I have two modules, let's say Base Feature Base has a SHService class from where I am calling a function of Feature module (of class SHCommon ). Feature module is building without error but Base raises error in linking phase. Snapshot of workspace: Base.SHService import Foundation import Feature class SHService { public func printMe(printString: String){ SHCommon().printMe(printString: printString) } } Feature.SHCommon import Foundation public class SHCommon {