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Questions tagged [phobos]

Phobos is the official runtime and standard library of the D programming language.

97 questions
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Remove substring from string in D

How to remove all occurrences of a string in another? I can do this using the following code: std.array.replace: "the string".replace("the", "") But I wonder if there is a dedicated function for this in phobos?
Denis Gladkiy
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Should std.algorithm.find demand a reference to range elements?

I have been working on a class-based finite random access range. When performing a few tests on it: auto myRange = /* construct my range */ static assert (isRandomAccessRange!(typeof(myRange))); // static assert (!isInfinite!(typeof(myRange))); …
E_net4
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How to mock standard library functions in D

I have a function that calls isFile (from std.file) on a filename and then proceeds appending .1, .2, .3 etc, checking whether each one of those is present. I want to unit test the function, but to do so I need to mock isFile. I looked around a bit…
garph0
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Comparing pointers to structs for the purpose of Phobos' Binary Heap

I've written a struct called Node, and want to be able to use pointers to that struct as entries in a Phobos BinaryHeap. However, I am not sure how opEquals and opCmp are implemented for pointers to structs (or in fact, in general). I've not been…
Koz Ross
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Manipulating Bits of Any Value Type

Has anybody cooked up some generic functions that extend core.bitop bitmanipulations to work on any value type? Something like bool getBit(T)(in T a, int bitnum); // bt T setBit(T)(in T a, int bitnum); // bts auto ref setBitInPlace(T)(ref T a, int…
Nordlöw
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In-Place Ordering of Elements

Does Phobos have some variadic algorithm to order l-value reference arguments in place? Something like int a=3; int b=2; int c=1; orderInPlace(a,b,c); // a is now 1 // b is now 2 // c is now 3 Also a functional variant, say order(a, b, c), that…
Nordlöw
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Using std.array.replace on the result of std.algorithm.map

So I was fiddling around with the D Programming Language today and just could not find any information about how to use std.array.replace on the return type of std.algorithm.map void main() { import std.stdio : writeln; writeln(test([1, 2,…
Dominik Lohmann
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Object.Error: Access Violation when printing result of std.algorithm.cartesianProduct

I'm using DMD 2.062 for x86. module test; private enum test1 { one, two, three, } private enum test2 { one, two, three, } auto ct = cartesianProduct([EnumMembers!test1], [EnumMembers!test2]); unittest { import…
Meta
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how to decode ubyte[] to a specified encoding?

The problem is: how to parse a file when encoding is set at runtime? encoding could be: utf-8, utf-16, latin1 or other The goal it is to convert ubyte[] to a string from the selected encoding. Because when you use std.stdio.File.byChunk or…
bioinfornatics
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D- how to verify that an IP address is valid

I'm writing an HTTP parsing library (because I couldn't find a good one in pure D), and I needed to be able to validate IP addresses (for the URI field), so I wrote a couple functions to validate IP addresses: For IPv4: bool isIPv4(string addr) { …
beatgammit
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Can I rely on the presence of shell()?

std.process has a nice shell() function. import std.process; import std.stdio; void main() { string Output = shell("ls ."); writeln("The contents of this directory are:"); write(Output); } It is documented in the Phobos source, but not…
Maxpm
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Return dynamic type

i know template like T add(T)(T a, Tb){ return a + b; } But this need to user ask which type will be return, me i want compute inside method which type will be returned like: T getField( size_t column ){ if( column == 0 ) T = int; …
bioinfornatics
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Unable to recursively multiply BigInt beyond a certain number of iterations at compile-time in D

I need to get the product of an arbitrary number of variables. The actual number of variables and their values will be known at compile-time, however I cannot hardcode these because they come from reflection done on types at compile-time, using…
saxbophone
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DMD Phobos-to-Tango conversion: va_arg - what is it? and what do I replace it with?

I'm trying to convert some Phobos code to its Tango equivalent, but I am stuck on this piece of code that I don't completely understand: OutBuffer codebuf; (...) void gen(Loc loc, uint opcode, uint argc, ...) { codebuf.reserve((1 + argc) *…
Frederik
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What is the right way to convert Variant to proper type?

I use mysql-native that return Variant data type. I need to convert it to standard types like int, string etc. D have std.conv, but std.variant also have methods for concretion. I can't understand what difference between: get, coerce, toString and…
Dmitry Bubnenkov
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