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When is -XAllowAmbiguousTypes appropriate?

...er non-ambiguous types. So let's compare the contexts of the two functions and look for functional dependencies. class ApplySym sig f sym | sig sym -> f, f -> sig sym class SyntacticN f internal | f -> internal sugarSym :: ( sub :<: AST sup , ApplySym sig fi sup ...
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When to make a type non-movable in C++11?

...x objects. If std::mutex contained a native OS mutex type as a data member and the native type's address must stay fixed (because the OS maintains a list of pointers to its mutexes) then either std::mutex would have to store the native mutex type on the heap so it would stay at the same location whe...
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How to write a large buffer into a binary file in C++, fast?

I'm trying to write huge amounts of data onto my SSD(solid state drive). And by huge amounts I mean 80GB. 12 Answers ...
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Learning to write a compiler [closed]

...lf and a bottom-one. The top-half generally takes the source language and converts it into an intermediate representation, and the bottom half takes care of the platform specific code generation. Nonetheless, one idea for an easy way to approach this topic (the one we used in my compilers class, a...
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What does “where T : class, new()” mean?

...constraint on the generic parameter T. It must be a class (reference type) and must have a public parameter-less default constructor. That means T can't be an int, float, double, DateTime or any other struct (value type). It could be a string, or any other custom reference type, as long as it has ...
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How do you concatenate Lists in C#?

...ne I think so. As previously said, Concat returns a new sequence and while converting the result to List, it does the job perfectly. share | improve this answer | follow ...
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Constructors in Go

I have a struct and I would like it to be initialised with some sensible default values. 11 Answers ...
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When should I use C++14 automatic return type deduction?

...11 raises similar questions: when to use return type deduction in lambdas, and when to use auto variables. The traditional answer to the question in C and C++03 has been "across statement boundaries we make types explicit, within expressions they are usually implicit but we can make them explicit w...
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Big O, how do you calculate/approximate it?

Most people with a degree in CS will certainly know what Big O stands for . It helps us to measure how well an algorithm scales. ...
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Get started with Latex on Linux [closed]

...to produce some output (as a .dvi file to start with, which is possible to convert to many other formats): latex test.tex This will print a bunch of output, something like this: => latex test.tex This is pdfeTeX, Version 3.141592-1.21a-2.2 (Web2C 7.5.4) entering extended mode (./test.tex LaTeX2...