From 70ada0ecf35e740d0d10a64b058b12ad32475ffa Mon Sep 17 00:00:00 2001
From: Chip Hogg <chogg@aurora.tech>
Date: Wed, 20 Jul 2022 01:03:55 +0000
Subject: [PATCH] Update prefix documentation

---
 docs/framework/units.rst | 55 +++++++++++++++++++++-------------------
 1 file changed, 29 insertions(+), 26 deletions(-)

diff --git a/docs/framework/units.rst b/docs/framework/units.rst
index f9981ba5..c29977b0 100644
--- a/docs/framework/units.rst
+++ b/docs/framework/units.rst
@@ -206,26 +206,27 @@ complete list of all the :term:`SI` prefixes supported by the library::
 
     namespace si {
 
-    struct yocto : prefix<yocto, "y", ratio(1, 1, -24)> {};
-    struct zepto : prefix<zepto, "z", ratio(1, 1, -21)> {};
-    struct atto  : prefix<atto,  "a", ratio(1, 1, -18)> {};
-    struct femto : prefix<femto, "f", ratio(1, 1, -15)> {};
-    struct pico  : prefix<pico,  "p", ratio(1, 1, -12)> {};
-    struct nano  : prefix<nano,  "n", ratio(1, 1,  -9)> {};
-    struct micro : prefix<micro, "µ", ratio(1, 1,  -6)> {};
-    struct milli : prefix<milli, "m", ratio(1, 1,  -3)> {};
-    struct centi : prefix<centi, "c", ratio(1, 1,  -2)> {};
-    struct deci  : prefix<deci,  "d", ratio(1, 1,  -1)> {};
-    struct deca  : prefix<deca,  "da",ratio(1, 1,   1)> {};
-    struct hecto : prefix<hecto, "h", ratio(1, 1,   2)> {};
-    struct kilo  : prefix<kilo,  "k", ratio(1, 1,   3)> {};
-    struct mega  : prefix<mega,  "M", ratio(1, 1,   6)> {};
-    struct giga  : prefix<giga,  "G", ratio(1, 1,   9)> {};
-    struct tera  : prefix<tera,  "T", ratio(1, 1,  12)> {};
-    struct peta  : prefix<peta,  "P", ratio(1, 1,  15)> {};
-    struct exa   : prefix<exa,   "E", ratio(1, 1,  18)> {};
-    struct zetta : prefix<zetta, "Z", ratio(1, 1,  21)> {};
-    struct yotta : prefix<yotta, "Y", ratio(1, 1,  24)> {};
+    struct yocto  : prefix<yocto, "y",             pow<-24>(as_magnitude<10>())> {};
+    struct zepto  : prefix<zepto, "z",             pow<-21>(as_magnitude<10>())> {};
+    struct atto   : prefix<atto,  "a",             pow<-18>(as_magnitude<10>())> {};
+    struct femto  : prefix<femto, "f",             pow<-15>(as_magnitude<10>())> {};
+    struct pico   : prefix<pico,  "p",             pow<-12>(as_magnitude<10>())> {};
+    struct nano   : prefix<nano,  "n",             pow<-9>(as_magnitude<10>())> {};
+    struct micro  : prefix<micro, basic_symbol_text{"\u00b5", "u"},
+                                                   pow<-6>(as_magnitude<10>())> {};
+    struct milli  : prefix<milli, "m",             pow<-3>(as_magnitude<10>())> {};
+    struct centi  : prefix<centi, "c",             pow<-2>(as_magnitude<10>())> {};
+    struct deci   : prefix<deci,  "d",             pow<-1>(as_magnitude<10>())> {};
+    struct deca   : prefix<deca,  "da",            pow<1>(as_magnitude<10>())> {};
+    struct hecto  : prefix<hecto, "h",             pow<2>(as_magnitude<10>())> {};
+    struct kilo   : prefix<kilo,  "k",             pow<3>(as_magnitude<10>())> {};
+    struct mega   : prefix<mega,  "M",             pow<6>(as_magnitude<10>())> {};
+    struct giga   : prefix<giga,  "G",             pow<9>(as_magnitude<10>())> {};
+    struct tera   : prefix<tera,  "T",             pow<12>(as_magnitude<10>())> {};
+    struct peta   : prefix<peta,  "P",             pow<15>(as_magnitude<10>())> {};
+    struct exa    : prefix<exa,   "E",             pow<18>(as_magnitude<10>())> {};
+    struct zetta  : prefix<zetta, "Z",             pow<21>(as_magnitude<10>())> {};
+    struct yotta  : prefix<yotta, "Y",             pow<24>(as_magnitude<10>())> {};
 
     }
 
@@ -234,12 +235,14 @@ domain::
 
     namespace iec80000 {
 
-    struct kibi : prefix<kibi, "Ki", ratio(                    1'024)> {};
-    struct mebi : prefix<mebi, "Mi", ratio(                1'048'576)> {};
-    struct gibi : prefix<gibi, "Gi", ratio(            1'073'741'824)> {};
-    struct tebi : prefix<tebi, "Ti", ratio(        1'099'511'627'776)> {};
-    struct pebi : prefix<pebi, "Pi", ratio(    1'125'899'906'842'624)> {};
-    struct exbi : prefix<exbi, "Ei", ratio(1'152'921'504'606'846'976)> {};
+    struct kibi : prefix<kibi, "Ki", pow<10>(as_magnitude<2>())> {};
+    struct mebi : prefix<mebi, "Mi", pow<20>(as_magnitude<2>())> {};
+    struct gibi : prefix<gibi, "Gi", pow<30>(as_magnitude<2>())> {};
+    struct tebi : prefix<tebi, "Ti", pow<40>(as_magnitude<2>())> {};
+    struct pebi : prefix<pebi, "Pi", pow<50>(as_magnitude<2>())> {};
+    struct exbi : prefix<exbi, "Ei", pow<60>(as_magnitude<2>())> {};
+    struct zebi : prefix<zebi, "Zi", pow<70>(as_magnitude<2>())> {};
+    struct yobi : prefix<yobi, "Yi", pow<80>(as_magnitude<2>())> {};
 
     }