<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Tino, Thanks for making your proposal.<div class=""><div class=""><br class=""></div><div class="">One of the points from your ‘alternatives considered’ section,</div><div class=""><h4 style="box-sizing: border-box; margin-top: 1em; margin-bottom: 16px; line-height: 1.4; font-size: 1.25em; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""></h4><blockquote type="cite" class=""><h4 style="box-sizing: border-box; margin-top: 1em; margin-bottom: 16px; line-height: 1.4; font-size: 1.25em; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class="">Marked parameters</h4><p style="box-sizing: border-box; margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">It would be possible to keep the parameters in the initializer (or function) and mark them with a keyword: <code style="box-sizing: border-box; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">init(static dimensions: Int) {...</code></p></blockquote><div class="">got me thinking. What if parameters marked with static, or constexpr, or some such, could complement template parameters, rather than being an alternative to them. Basically, stuff between the angle brackets is relevant for determining storage needed, and other constexpr parameters enable arbitrary compile time checks. I hope the mailing list doesn’t mind a little brainstorming about these further off features. Probably easiest to explain myself in terms of the matrix example:</div><div class=""><br class=""></div><div class=""><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: rgb(187, 44, 162);" class="">struct</span><span style="font-variant-ligatures: no-common-ligatures;" class=""> Matrix<T:ScalarType, NRows:UInt, NCols:UInt>{</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">let</span><span style="font-variant-ligatures: no-common-ligatures" class=""> entries: [</span><span style="font-variant-ligatures: no-common-ligatures; color: #703daa" class="">ScalarType</span><span style="font-variant-ligatures: no-common-ligatures" class="">]</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""><br class=""></span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""><span style="color: rgb(0, 132, 0);" class=""> //note the initializer parameter marked as a constexpr,</span> </span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""><span style="color: rgb(0, 132, 0);" class=""> //which enables further compile time checks with a `where` clause</span></span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">init</span><span style="font-variant-ligatures: no-common-ligatures" class="">(entries: </span><span style="font-variant-ligatures: no-common-ligatures; color: #703daa" class="">constexpr</span><span style="font-variant-ligatures: no-common-ligatures" class=""> [ScalarType] </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">where</span><span style="font-variant-ligatures: no-common-ligatures" class=""> entries.count == NRows * NCols) {</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">self</span><span style="font-variant-ligatures: no-common-ligatures" class="">.entries = entries</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> }</span></div><p style="margin: 0px; line-height: normal; font-family: Menlo; min-height: 21px;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""><span class="Apple-tab-span" style="white-space:pre"> </span></span><br class="webkit-block-placeholder"></p><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span><span style="color: rgb(187, 44, 162); font-variant-ligatures: no-common-ligatures;" class="">subscript</span><span style="color: rgb(0, 0, 0); font-variant-ligatures: no-common-ligatures;" class="">(i:</span><span style="color: rgb(112, 61, 170); font-variant-ligatures: no-common-ligatures;" class="">Int</span><span style="color: rgb(0, 0, 0); font-variant-ligatures: no-common-ligatures;" class="">, j:</span><span style="color: rgb(112, 61, 170); font-variant-ligatures: no-common-ligatures;" class="">Int</span><span style="color: rgb(0, 0, 0); font-variant-ligatures: no-common-ligatures;" class="">) -> </span><span style="color: rgb(112, 61, 170); font-variant-ligatures: no-common-ligatures;" class="">ScalarType</span><span style="color: rgb(0, 0, 0); font-variant-ligatures: no-common-ligatures;" class="">{</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> …</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> }</span><span class="Apple-tab-span" style="white-space: pre;"> </span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class="">}</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo; min-height: 21px;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class=""></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">typealias</span><span style="font-variant-ligatures: no-common-ligatures" class=""> SquareMatrix = </span><span style="font-variant-ligatures: no-common-ligatures; color: #703daa" class="">Matrix</span><span style="font-variant-ligatures: no-common-ligatures" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">where</span><span style="font-variant-ligatures: no-common-ligatures" class=""> NRows == NCols</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo; min-height: 21px;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class=""></div><div style="margin: 0px; line-height: normal; font-family: Menlo; color: rgb(112, 61, 170);" class=""><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">extension</span><span style="font-variant-ligatures: no-common-ligatures; color: #000000" class=""> </span><span style="font-variant-ligatures: no-common-ligatures" class="">SquareMatrix</span><span style="font-variant-ligatures: no-common-ligatures; color: #000000" class="">{</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> static</span><span style="color: rgb(0, 0, 0); font-variant-ligatures: no-common-ligatures;" class=""> </span><span style="color: rgb(187, 44, 162); font-variant-ligatures: no-common-ligatures;" class="">alias</span><span style="color: rgb(0, 0, 0); font-variant-ligatures: no-common-ligatures;" class=""> Dim = NRows</span><span style="color: rgb(0, 132, 0);" class="">//no additional storage</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">func</span><span style="font-variant-ligatures: no-common-ligatures" class=""> determinant() -> </span><span style="font-variant-ligatures: no-common-ligatures; color: #703daa" class="">ScalarType</span><span style="font-variant-ligatures: no-common-ligatures" class="">{</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> ...</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> }</span></div><p style="margin: 0px; line-height: normal; font-family: Menlo; min-height: 21px;" class="">}</p><div style="margin: 0px; line-height: normal; font-family: Menlo; min-height: 21px;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class=""></div><div style="margin: 0px; line-height: normal; font-family: Menlo; color: rgb(0, 132, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">struct</span><span style="font-variant-ligatures: no-common-ligatures; color: #000000" class=""> InvertibleMatrix: </span><span style="font-variant-ligatures: no-common-ligatures; color: #703daa" class="">SquareMatrix</span><span style="font-variant-ligatures: no-common-ligatures; color: #000000" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">where</span><span style="font-variant-ligatures: no-common-ligatures; color: #000000" class=""> determinant() != </span><span style="font-variant-ligatures: no-common-ligatures; color: #272ad8" class="">0</span><span style="font-variant-ligatures: no-common-ligatures; color: #000000" class=""> </span></div><div style="margin: 0px; line-height: normal; font-family: Menlo; color: rgb(0, 132, 0);" class=""><span style="font-variant-ligatures: no-common-ligatures" class="">// ^~~ 'restriction’ clause, i.e., not inheritance;</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="color: rgb(0, 132, 0);" class="">// determinant() is executed at compile time,</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="color: rgb(0, 132, 0);" class="">// since `entries` is a constexpr</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo; min-height: 21px;" class=""><br class=""></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class=""><br class=""></span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">struct</span><span style="font-variant-ligatures: no-common-ligatures" class=""> AntisymmetricMatrix: </span><span style="font-variant-ligatures: no-common-ligatures; color: #4f8187" class="">InvertibleMatrix</span><span style="font-variant-ligatures: no-common-ligatures" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">where</span><span style="font-variant-ligatures: no-common-ligatures" class=""> {</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""> <span style="color: rgb(0, 132, 0);" class="">//more complicated restriction clause, something like a</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> <font color="#008400" class="">//compile time predicate/closure, which operates on member variables that are constexprs</font></span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">for</span><span style="font-variant-ligatures: no-common-ligatures" class=""> i </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">in</span><span style="font-variant-ligatures: no-common-ligatures" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: #272ad8" class="">0</span><span style="font-variant-ligatures: no-common-ligatures" class="">..<Dim{</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">for</span><span style="font-variant-ligatures: no-common-ligatures" class=""> j </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">in</span><span style="font-variant-ligatures: no-common-ligatures" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: #272ad8" class="">0</span><span style="font-variant-ligatures: no-common-ligatures" class="">..<Dim{</span></div><div style="margin: 0px; line-height: normal;" class=""><font face="Menlo" class=""> </font><span style="font-family: Menlo; color: rgb(187, 44, 162);" class="">static_assert(</span><font face="Menlo" class="">entries[i][j] == -entries[j][i], </font><font color="#d12f1b" face="Menlo" class="">“invalid entries”</font><font face="Menlo" class="">);</font></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""> }</div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""> }</div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class="">}</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo; min-height: 21px;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class=""></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">struct</span><span style="font-variant-ligatures: no-common-ligatures" class=""> ComplexNumber: </span><span style="font-variant-ligatures: no-common-ligatures; color: #4f8187" class="">AntisymmetricMatrix<Dim: 2></span><span style="font-variant-ligatures: no-common-ligatures" class=""> </span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: rgb(187, 44, 162);" class=""><span class="Apple-tab-span" style="white-space:pre"> </span> where</span><span style="font-variant-ligatures: no-common-ligatures;" class=""> entries[</span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(39, 42, 216);" class="">0</span><span style="font-variant-ligatures: no-common-ligatures;" class="">,</span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(39, 42, 216);" class="">0</span><span style="font-variant-ligatures: no-common-ligatures;" class="">] == entries[</span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(39, 42, 216);" class="">1</span><span style="font-variant-ligatures: no-common-ligatures;" class="">,</span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(39, 42, 216);" class="">1</span><span style="font-variant-ligatures: no-common-ligatures;" class="">] </span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""><span class="Apple-tab-span" style="white-space:pre"> </span> && entries[</span><span style="font-variant-ligatures: no-common-ligatures; color: #272ad8" class="">0</span><span style="font-variant-ligatures: no-common-ligatures" class="">,</span><span style="font-variant-ligatures: no-common-ligatures; color: #272ad8" class="">1</span><span style="font-variant-ligatures: no-common-ligatures" class="">] == -entries[</span><span style="font-variant-ligatures: no-common-ligatures; color: #272ad8" class="">1</span><span style="font-variant-ligatures: no-common-ligatures" class="">,</span><span style="font-variant-ligatures: no-common-ligatures; color: #272ad8" class="">0</span><span style="font-variant-ligatures: no-common-ligatures" class="">]</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo; min-height: 21px;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""></span><br class=""></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">struct</span><span style="font-variant-ligatures: no-common-ligatures" class=""> Rotor: </span><span style="font-variant-ligatures: no-common-ligatures; color: #4f8187" class="">ComplexNumber</span><span style="font-variant-ligatures: no-common-ligatures" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2" class="">where</span><span style="font-variant-ligatures: no-common-ligatures" class=""> magnitude() == </span><span style="font-variant-ligatures: no-common-ligatures; color: #272ad8" class="">1.0</span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: #272ad8" class=""><br class=""></span></div><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: #272ad8" class=""><div style="margin: 0px; line-height: normal; font-family: Menlo; color: rgb(79, 129, 135);" class=""><span style="font-variant-ligatures: no-common-ligatures; color: rgb(187, 44, 162);" class="">func</span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(0, 0, 0);" class=""> *(lhs:</span><span style="font-variant-ligatures: no-common-ligatures;" class="">ComplexNumber</span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(0, 0, 0);" class="">, rhs:</span><span style="font-variant-ligatures: no-common-ligatures;" class="">ComplexNumber</span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(0, 0, 0);" class="">) -> </span><span style="font-variant-ligatures: no-common-ligatures;" class="">ComplexNumber</span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(0, 0, 0);" class="">{</span></div><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(187, 44, 162);" class="">return</span><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(79, 129, 135);" class="">ComplexNumber</span><span style="font-variant-ligatures: no-common-ligatures;" class="">( entries: [lhs.entries[</span>0<span style="font-variant-ligatures: no-common-ligatures;" class="">,</span>0<span style="font-variant-ligatures: no-common-ligatures;" class="">]* …)</span><div style="margin: 0px; line-height: normal; font-family: Menlo;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class="">}</span></div></span></div><div style="margin: 0px; line-height: normal; font-family: Menlo; min-height: 21px;" class=""><br class=""><span style="font-variant-ligatures: no-common-ligatures" class=""></span></div><div style="margin: 0px; line-height: normal; font-family: Menlo; min-height: 21px;" class=""><div style="margin: 0px; line-height: normal;" class=""><span style="color: rgb(0, 132, 0);" class="">//another syntax option this feature:</span></div><div style="margin: 0px; line-height: normal;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: rgb(187, 44, 162);" class="">typerestriction</span><span style="font-variant-ligatures: no-common-ligatures;" class=""> InvertibleMatrix = </span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(112, 61, 170);" class="">SquareMatrix</span><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(187, 44, 162);" class="">where</span><span style="font-variant-ligatures: no-common-ligatures;" class=""> determinant() != </span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(39, 42, 216);" class="">0</span><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span></div><div style="margin: 0px; line-height: normal;" class=""><span style="font-variant-ligatures: no-common-ligatures;" class=""><br class=""></span></div><div style="margin: 0px; line-height: normal;" class=""><span style="color: rgb(0, 132, 0);" class="">//and another:</span></div><div style="margin: 0px; line-height: normal;" class=""><span style="font-variant-ligatures: no-common-ligatures; color: rgb(187, 44, 162);" class="">typespecialization</span><span style="font-variant-ligatures: no-common-ligatures;" class=""> InvertibleMatrix = </span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(112, 61, 170);" class="">SquareMatrix</span><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(187, 44, 162);" class="">where</span><span style="font-variant-ligatures: no-common-ligatures;" class=""> determinant() != </span><span style="font-variant-ligatures: no-common-ligatures; color: rgb(39, 42, 216);" class="">0</span><span style="font-variant-ligatures: no-common-ligatures;" class=""> </span></div></div><div style="margin: 0px; line-height: normal; font-family: Menlo; min-height: 21px;" class=""><span style="font-variant-ligatures: no-common-ligatures" class=""></span></div></div><div class="">Some obvious drawbacks here are long compile times (eg, computing a 10x10 determinant), and of course many situations where you can’t know things at compile time so this doesn’t help you. But I think it’s an interesting direction to look at. A type system with such capabilities, + playgrounds/REPLs, and you’ve got something akin to Mathematica, but without the mind-bending syntax.</div><div class=""><br class=""></div><div class="">Matt</div><div class=""><br class=""></div><div class=""><br class=""></div><div><blockquote type="cite" class=""><div class="">On Jan 12, 2016, at 06:22, Tino Heth <<a href="mailto:2th@gmx.de" class="">2th@gmx.de</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Hi there!<br class=""><br class="">I hope there's still some interest in the topic (or in the cartwheels-video Matt promised ;-) and just finished the draft for a first proposal.<br class="">Instead of trying to turn typealias into some sort of newtype, which leaves a lot more questions open as I thought originally, I started with "compile-time parameters":<br class="">The name of the feature can be discussed (as well as its details), but it would not only add typesafety to matrix, vector, tensor and other entities, but also offer a simple way to handle computations with physical quantities (three of those should be sufficient in most cases, so the idea mentioned by Thorsten should work fine).<br class=""><br class="">I still haven't taken the time to take a detailed look at boost units, but I would be glad if someone with practical experience could contribute to the proposal — the same is true for all other parts, as I'd happily turn the document into a joint paper (I'm not sure, but maybe it could even become the first multi-author submission :)<br class=""><br class="">To make this easier, I created a wiki-page; this should be editable without forking a repository (I haven't figured out if a can give write permissions to everyone, so it might be necessary to click somewhere to request permissions).<br class="">The URL is<br class=""><a href="https://github.com/SwiftTypesafeCalculations/Home/wiki/Compile-time-parameters" class="">https://github.com/SwiftTypesafeCalculations/Home/wiki/Compile-time-parameters</a><br class=""><br class="">Happy collaboration!<br class="">Tino</div></div></blockquote></div><br class=""></div></div></body></html>