CODEWITHSUNDEEP
importd
Koz Ross
Koz Ross

Reputation: 3140

D: What is the difference between targeted and general imports?

When importing something into a D module, you can either write

import std.string;

or

import std.string: format;

Apart from the obvious semantic differences, does this have any other effects? For example, size of the binary, compilation time, something else?

Upvotes: 3

Views: 84

Answers (2)

Nil
Nil

Reputation: 2390

I would add to ratchet freak's answer that named import (or wathever the name) avoids name clash. Having just what you need in the current scope when coding is nice to avoid bug and to have more freedom when naming things. If you only use import std.string;, you won't be able to name your variables/functions succ, center, etc.

Upvotes: 2

ratchet freak
ratchet freak

Reputation: 48196

size of the binary will be unchanged, (each import module is linked to a .d file and will be compiled and linked in whole), the linker doesn't take imports into account when culling unused code

compilation time might be a bit faster on account of not needing to fill out a large symbol table

Upvotes: 3

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