¶sus::Result<std::string, VarError> var(
    const std::string& key) noexcept

Description

Fetches the environment variable `key` from the current process. # Errors This function will return an error if the environment variable isn't set. This function may return an error if the `key` is not a valid multi-byte encoding for the current locale (typically utf8). This function may return an error if the environment variable's name contains the equal sign character `'='` or the NUL character `' \ 0'`. TODO: [Figure out](https://github.com/chromium/subspace/issues/326) a nicer way to receive unowned possibly-null-terminated strings. string_view reports a size before the null so you can't tell and you need to copy from it.

Declared at: sus/env/var.h:57

Parameters

const std::string& key