Function hasEnvVarConstant [src]

On Windows, key must be valid UTF-8.

Prototype

pub fn hasEnvVarConstant(comptime key: []const u8) bool

Parameters

key: []const u8

Example

 test hasEnvVarConstant {
    if (native_os == .wasi and !builtin.link_libc) return error.SkipZigTest;

    try testing.expect(!hasEnvVarConstant("BADENV"));
}

Source

  pub fn hasEnvVarConstant(comptime key: []const u8) bool {
    if (native_os == .windows) {
        const key_w = comptime unicode.utf8ToUtf16LeStringLiteral(key);
        return getenvW(key_w) != null;
    } else if (native_os == .wasi and !builtin.link_libc) {
        @compileError("hasEnvVarConstant is not supported for WASI without libc");
    } else {
        return posix.getenv(key) != null;
    }
}  