Start creating an ICU::Calendar implementation for IFC

Cargo.lock

@@ -330,6 +330,16 @@ dependencies = [
  "system-deps",
 ]
 
+[[package]]
+name = "calendrical_calculations"
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+checksum = "8dfe3bc6a50b4667fafdb6d9cf26731c5418c457e317d8166c972014facf9a5d"
+dependencies = [
+ "core_maths",
+ "displaydoc",
+]
+
 [[package]]
 name = "cc"
 version = "1.0.83"
@@ -539,6 +549,15 @@ version = "0.8.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06ea2b9bc92be3c2baa9334a323ebca2d6f074ff852cd1d7b11064035cd3868f"
 
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+checksum = "e3b02505ccb8c50b0aa21ace0fc08c3e53adebd4e58caa18a36152803c7709a3"
+dependencies = [
+ "libm",
+]
+
 [[package]]
 name = "cpufeatures"
 version = "0.2.11"
@@ -955,6 +974,17 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
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+version = "0.5.5"
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+checksum = "cbc7fdec9d7f6671a3ebb3282c969962aba67c49f6abac5311959b65cafabc10"
+dependencies = [
+ "displaydoc",
+ "smallvec",
+ "writeable",
+]
+
 [[package]]
 name = "flate2"
 version = "1.0.28"
@@ -1818,6 +1848,422 @@ dependencies = [
  "libadwaita",
 ]
 
+[[package]]
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+checksum = "21be1c98fbdb29fff7e34b2939a4f30dad330d4cc20f7be1b3956e21032f67ba"
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+ "icu_casemap",
+ "icu_collator",
+ "icu_collections",
+ "icu_compactdecimal",
+ "icu_datetime",
+ "icu_decimal",
+ "icu_displaynames",
+ "icu_list",
+ "icu_locid",
+ "icu_locid_transform",
+ "icu_normalizer",
+ "icu_plurals",
+ "icu_properties",
+ "icu_provider",
+ "icu_relativetime",
+ "icu_segmenter",
+ "icu_timezone",
+]
+
+[[package]]
+name = "icu_calendar"
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+checksum = "7eb932a690c92f87955e923106181ee0d5682e688ff37fb5c7b296e1fe806edb"
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+ "displaydoc",
+ "icu_calendar_data",
+ "icu_locid",
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+ "zerovec",
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+ "icu_provider",
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+ "displaydoc",
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+ "icu_locid",
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+ "utf8_iter",
+ "zerovec",
+]
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+dependencies = [
+ "displaydoc",
+ "icu_calendar",
+ "icu_locid",
+ "icu_provider",
+ "icu_timezone_data",
+ "tinystr",
+ "zerotrie",
+ "zerovec",
+]
+
+[[package]]
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+
 [[package]]
 name = "idna"
 version = "0.1.5"
@@ -1844,6 +2290,7 @@ name = "ifc"
 version = "0.1.0"
 dependencies = [
  "chrono",
+ "icu",
  "serde 1.0.193",
  "thiserror",
 ]
@@ -2111,6 +2558,12 @@ version = "0.4.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4cd1a83af159aa67994778be9070f0ae1bd732942279cabb14f86f986a21456"
 
+[[package]]
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+checksum = "f9d642685b028806386b2b6e75685faadd3eb65a85fff7df711ce18446a422da"
+
 [[package]]
 name = "lock_api"
 version = "0.4.11"
@@ -3081,10 +3534,19 @@ checksum = "380b951a9c5e80ddfd6136919eef32310721aa4aacd4889a8d39124b026ab343"
 dependencies = [
  "aho-corasick",
  "memchr",
- "regex-automata",
+ "regex-automata 0.4.3",
  "regex-syntax",
 ]
 
+[[package]]
+name = "regex-automata"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e9368763f5a9b804326f3af749e16f9abf378d227bcdee7634b13d8f17793782"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "regex-automata"
 version = "0.4.3"
@@ -3708,6 +4170,12 @@ dependencies = [
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 ]
 
+[[package]]
+name = "stable_deref_trait"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
 [[package]]
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 version = "0.1.4"
@@ -3753,6 +4221,17 @@ dependencies = [
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 ]
 
+[[package]]
+name = "synstructure"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c8af7666ab7b6390ab78131fb5b0fce11d6b7a6951602017c35fa82800708971"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.48",
+]
+
 [[package]]
 name = "system-configuration"
 version = "0.5.1"
@@ -3922,6 +4401,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "83c02bf3c538ab32ba913408224323915f4ef9a6d61c0e85d493f355921c0ece"
 dependencies = [
  "displaydoc",
+ "zerovec",
 ]
 
 [[package]]
@@ -4304,6 +4784,18 @@ version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09cc8ee72d2a9becf2f2febe0205bbed8fc6615b7cb429ad062dc7b7ddd036a9"
 
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+
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@@ -4715,6 +5207,42 @@ dependencies = [
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 ]
 
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 [[package]]
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@@ -4735,12 +5263,66 @@ dependencies = [
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+name = "zerofrom-derive"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6a647510471d372f2e6c2e6b7219e44d8c574d24fdc11c610a61455782f18c3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.48",
+ "synstructure",
+]
+
 [[package]]
 name = "zeroize"
 version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "525b4ec142c6b68a2d10f01f7bbf6755599ca3f81ea53b8431b7dd348f5fdb2d"
 
+[[package]]
+name = "zerotrie"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d0594125a0574fb93059c92c588ab209cc036a23d1baeb3410fa9181bea551a0"
+dependencies = [
+ "displaydoc",
+ "yoke",
+ "zerofrom",
+]
+
+[[package]]
+name = "zerovec"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eff4439ae91fb5c72b8abc12f3f2dbf51bd27e6eadb9f8a5bc8898dddb0e27ea"
+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
+[[package]]
+name = "zerovec-derive"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b4e5997cbf58990550ef1f0e5124a05e47e1ebd33a84af25739be6031a62c20"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.48",
+]
+
 [[package]]
 name = "zune-inflate"
 version = "0.2.54"

ifc/Cargo.toml

@@ -12,3 +12,4 @@ license = "GPL-3.0-only"
 chrono      = { version = "0.4" }
 serde       = { version = "1.0", features = ["derive"] }
 thiserror   = { version = "1" }
+icu         = { version = "1" }

ifc/src/lib.rs

@@ -14,6 +14,7 @@ use chrono::{Datelike, NaiveDate};
 use serde::{Deserialize, Serialize};
 use std::convert::TryInto;
 use thiserror::Error;
+use icu::calendar::Calendar;
 
 #[derive(Clone, Debug, Error, PartialEq)]
 pub enum Error {
@@ -270,6 +271,23 @@ impl From<IFC> for chrono::NaiveDate {
     }
 }
 
+struct IFCCalendar {}
+
+impl Calendar for IFCCalendar {
+    type DateInner = IFC;
+
+    fn date_from_codes(
+            &self,
+            era: icu::calendar::types::Era,
+            year: i32,
+            month_code: icu::calendar::types::MonthCode,
+            day: u8,
+        ) -> Result<Self::DateInner, icu::calendar::CalendarError> {
+        // support bce (before common era), ce (common era), and he (human era)
+        
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;