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| </pre><pre class="rust"><code><span class="doccomment">//! Parse parts of an ISO 8601-formatted value. |
| |
| </span><span class="kw">use </span><span class="kw">crate</span>::convert::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::error; |
| <span class="kw">use </span><span class="kw">crate</span>::error::ParseFromDescription::{InvalidComponent, InvalidLiteral}; |
| <span class="kw">use </span><span class="kw">crate</span>::format_description::well_known::iso8601::EncodedConfig; |
| <span class="kw">use </span><span class="kw">crate</span>::format_description::well_known::Iso8601; |
| <span class="kw">use </span><span class="kw">crate</span>::parsing::combinator::rfc::iso8601::{ |
| day, dayk, dayo, float, hour, min, month, week, year, ExtendedKind, |
| }; |
| <span class="kw">use </span><span class="kw">crate</span>::parsing::combinator::{ascii_char, sign}; |
| <span class="kw">use </span><span class="kw">crate</span>::parsing::{Parsed, ParsedItem}; |
| |
| <span class="kw">impl</span><<span class="kw">const </span>CONFIG: EncodedConfig> Iso8601<CONFIG> { |
| <span class="comment">// Basic: [year][month][day] |
| // Extended: [year]["-"][month]["-"][day] |
| // Basic: [year][dayo] |
| // Extended: [year]["-"][dayo] |
| // Basic: [year]["W"][week][dayk] |
| // Extended: [year]["-"]["W"][week]["-"][dayk] |
| </span><span class="doccomment">/// Parse a date in the basic or extended format. Reduced precision is permitted. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>parse_date<<span class="lifetime">'a</span>>( |
| parsed: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>Parsed, |
| extended_kind: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>ExtendedKind, |
| ) -> <span class="kw">impl </span>FnMut(<span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Result</span><<span class="kw-2">&</span>[u8], error::Parse> + <span class="lifetime">'a </span>{ |
| <span class="kw">move </span>|input| { |
| <span class="comment">// Same for any acceptable format. |
| </span><span class="kw">let </span>ParsedItem(<span class="kw-2">mut </span>input, year) = year(input).ok_or(InvalidComponent(<span class="string">"year"</span>))<span class="question-mark">?</span>; |
| <span class="kw-2">*</span>extended_kind = <span class="kw">match </span>ascii_char::<<span class="string">b'-'</span>>(input) { |
| <span class="prelude-val">Some</span>(ParsedItem(new_input, ())) => { |
| input = new_input; |
| ExtendedKind::Extended |
| } |
| <span class="prelude-val">None </span>=> ExtendedKind::Basic, <span class="comment">// no separator before mandatory month/ordinal/week |
| </span>}; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>ret_error = <span class="kw">match </span>(|| { |
| <span class="kw">let </span>ParsedItem(<span class="kw-2">mut </span>input, month) = month(input).ok_or(InvalidComponent(<span class="string">"month"</span>))<span class="question-mark">?</span>; |
| <span class="kw">if </span>extended_kind.is_extended() { |
| input = ascii_char::<<span class="string">b'-'</span>>(input) |
| .ok_or(InvalidLiteral)<span class="question-mark">? |
| </span>.into_inner(); |
| } |
| <span class="kw">let </span>ParsedItem(input, day) = day(input).ok_or(InvalidComponent(<span class="string">"day"</span>))<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(ParsedItem(input, (month, day))) |
| })() { |
| <span class="prelude-val">Ok</span>(ParsedItem(input, (month, day))) => { |
| <span class="kw-2">*</span>parsed = parsed |
| .with_year(year) |
| .ok_or(InvalidComponent(<span class="string">"year"</span>))<span class="question-mark">? |
| </span>.with_month(month) |
| .ok_or(InvalidComponent(<span class="string">"month"</span>))<span class="question-mark">? |
| </span>.with_day(day) |
| .ok_or(InvalidComponent(<span class="string">"day"</span>))<span class="question-mark">?</span>; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(input); |
| } |
| <span class="prelude-val">Err</span>(err) => err, |
| }; |
| |
| <span class="comment">// Don't check for `None`, as the error from year-month-day will always take priority. |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(ParsedItem(input, ordinal)) = dayo(input) { |
| <span class="kw-2">*</span>parsed = parsed |
| .with_year(year) |
| .ok_or(InvalidComponent(<span class="string">"year"</span>))<span class="question-mark">? |
| </span>.with_ordinal(ordinal) |
| .ok_or(InvalidComponent(<span class="string">"ordinal"</span>))<span class="question-mark">?</span>; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(input); |
| } |
| |
| <span class="kw">match </span>(|| { |
| <span class="kw">let </span>input = ascii_char::<<span class="string">b'W'</span>>(input) |
| .ok_or((<span class="bool-val">false</span>, InvalidLiteral))<span class="question-mark">? |
| </span>.into_inner(); |
| <span class="kw">let </span>ParsedItem(<span class="kw-2">mut </span>input, week) = |
| week(input).ok_or((<span class="bool-val">true</span>, InvalidComponent(<span class="string">"week"</span>)))<span class="question-mark">?</span>; |
| <span class="kw">if </span>extended_kind.is_extended() { |
| input = ascii_char::<<span class="string">b'-'</span>>(input) |
| .ok_or((<span class="bool-val">true</span>, InvalidLiteral))<span class="question-mark">? |
| </span>.into_inner(); |
| } |
| <span class="kw">let </span>ParsedItem(input, weekday) = |
| dayk(input).ok_or((<span class="bool-val">true</span>, InvalidComponent(<span class="string">"weekday"</span>)))<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(ParsedItem(input, (week, weekday))) |
| })() { |
| <span class="prelude-val">Ok</span>(ParsedItem(input, (week, weekday))) => { |
| <span class="kw-2">*</span>parsed = parsed |
| .with_iso_year(year) |
| .ok_or(InvalidComponent(<span class="string">"year"</span>))<span class="question-mark">? |
| </span>.with_iso_week_number(week) |
| .ok_or(InvalidComponent(<span class="string">"week"</span>))<span class="question-mark">? |
| </span>.with_weekday(weekday) |
| .ok_or(InvalidComponent(<span class="string">"weekday"</span>))<span class="question-mark">?</span>; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(input); |
| } |
| <span class="prelude-val">Err</span>((<span class="bool-val">false</span>, _err)) => {} |
| <span class="comment">// This error is more accurate than the one from year-month-day. |
| </span><span class="prelude-val">Err</span>((<span class="bool-val">true</span>, err)) => ret_error = err, |
| } |
| |
| <span class="prelude-val">Err</span>(ret_error.into()) |
| } |
| } |
| |
| <span class="comment">// Basic: ["T"][hour][min][sec] |
| // Extended: ["T"][hour][":"][min][":"][sec] |
| // Reduced precision: components after [hour] (including their preceding separator) can be |
| // omitted. ["T"] can be omitted if there is no date present. |
| </span><span class="doccomment">/// Parse a time in the basic or extended format. Reduced precision is permitted. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>parse_time<<span class="lifetime">'a</span>>( |
| parsed: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>Parsed, |
| extended_kind: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>ExtendedKind, |
| date_is_present: bool, |
| ) -> <span class="kw">impl </span>FnMut(<span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Result</span><<span class="kw-2">&</span>[u8], error::Parse> + <span class="lifetime">'a </span>{ |
| <span class="kw">move </span>|<span class="kw-2">mut </span>input| { |
| <span class="kw">if </span>date_is_present { |
| input = ascii_char::<<span class="string">b'T'</span>>(input) |
| .ok_or(InvalidLiteral)<span class="question-mark">? |
| </span>.into_inner(); |
| } |
| |
| <span class="kw">let </span>ParsedItem(<span class="kw-2">mut </span>input, hour) = float(input).ok_or(InvalidComponent(<span class="string">"hour"</span>))<span class="question-mark">?</span>; |
| <span class="kw">match </span>hour { |
| (hour, <span class="prelude-val">None</span>) => parsed.set_hour_24(hour).ok_or(InvalidComponent(<span class="string">"hour"</span>))<span class="question-mark">?</span>, |
| (hour, <span class="prelude-val">Some</span>(fractional_part)) => { |
| <span class="kw-2">*</span>parsed = parsed |
| .with_hour_24(hour) |
| .ok_or(InvalidComponent(<span class="string">"hour"</span>))<span class="question-mark">? |
| </span>.with_minute((fractional_part * Second.per(Minute) <span class="kw">as </span>f64) <span class="kw">as _</span>) |
| .ok_or(InvalidComponent(<span class="string">"minute"</span>))<span class="question-mark">? |
| </span>.with_second( |
| (fractional_part * Second.per(Hour) <span class="kw">as </span>f64 % Minute.per(Hour) <span class="kw">as </span>f64) |
| <span class="kw">as _</span>, |
| ) |
| .ok_or(InvalidComponent(<span class="string">"second"</span>))<span class="question-mark">? |
| </span>.with_subsecond( |
| (fractional_part * Nanosecond.per(Hour) <span class="kw">as </span>f64 |
| % Nanosecond.per(Second) <span class="kw">as </span>f64) <span class="kw">as _</span>, |
| ) |
| .ok_or(InvalidComponent(<span class="string">"subsecond"</span>))<span class="question-mark">?</span>; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(input); |
| } |
| }; |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(ParsedItem(new_input, ())) = ascii_char::<<span class="string">b':'</span>>(input) { |
| extended_kind |
| .coerce_extended() |
| .ok_or(InvalidComponent(<span class="string">"minute"</span>))<span class="question-mark">?</span>; |
| input = new_input; |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>input = <span class="kw">match </span>float(input) { |
| <span class="prelude-val">Some</span>(ParsedItem(input, (minute, <span class="prelude-val">None</span>))) => { |
| extended_kind.coerce_basic(); |
| parsed |
| .set_minute(minute) |
| .ok_or(InvalidComponent(<span class="string">"minute"</span>))<span class="question-mark">?</span>; |
| input |
| } |
| <span class="prelude-val">Some</span>(ParsedItem(input, (minute, <span class="prelude-val">Some</span>(fractional_part)))) => { |
| <span class="comment">// `None` is valid behavior, so don't error if this fails. |
| </span>extended_kind.coerce_basic(); |
| <span class="kw-2">*</span>parsed = parsed |
| .with_minute(minute) |
| .ok_or(InvalidComponent(<span class="string">"minute"</span>))<span class="question-mark">? |
| </span>.with_second((fractional_part * Second.per(Minute) <span class="kw">as </span>f64) <span class="kw">as _</span>) |
| .ok_or(InvalidComponent(<span class="string">"second"</span>))<span class="question-mark">? |
| </span>.with_subsecond( |
| (fractional_part * Nanosecond.per(Minute) <span class="kw">as </span>f64 |
| % Nanosecond.per(Second) <span class="kw">as </span>f64) <span class="kw">as _</span>, |
| ) |
| .ok_or(InvalidComponent(<span class="string">"subsecond"</span>))<span class="question-mark">?</span>; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(input); |
| } |
| <span class="comment">// colon was present, so minutes are required |
| </span><span class="prelude-val">None </span><span class="kw">if </span>extended_kind.is_extended() => { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(error::Parse::ParseFromDescription(InvalidComponent( |
| <span class="string">"minute"</span>, |
| ))); |
| } |
| <span class="prelude-val">None </span>=> { |
| <span class="comment">// Missing components are assumed to be zero. |
| </span><span class="kw-2">*</span>parsed = parsed |
| .with_minute(<span class="number">0</span>) |
| .ok_or(InvalidComponent(<span class="string">"minute"</span>))<span class="question-mark">? |
| </span>.with_second(<span class="number">0</span>) |
| .ok_or(InvalidComponent(<span class="string">"second"</span>))<span class="question-mark">? |
| </span>.with_subsecond(<span class="number">0</span>) |
| .ok_or(InvalidComponent(<span class="string">"subsecond"</span>))<span class="question-mark">?</span>; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(input); |
| } |
| }; |
| |
| <span class="kw">if </span>extended_kind.is_extended() { |
| <span class="kw">match </span>ascii_char::<<span class="string">b':'</span>>(input) { |
| <span class="prelude-val">Some</span>(ParsedItem(new_input, ())) => input = new_input, |
| <span class="prelude-val">None </span>=> { |
| <span class="kw-2">*</span>parsed = parsed |
| .with_second(<span class="number">0</span>) |
| .ok_or(InvalidComponent(<span class="string">"second"</span>))<span class="question-mark">? |
| </span>.with_subsecond(<span class="number">0</span>) |
| .ok_or(InvalidComponent(<span class="string">"subsecond"</span>))<span class="question-mark">?</span>; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(input); |
| } |
| } |
| } |
| |
| <span class="kw">let </span>(input, second, subsecond) = <span class="kw">match </span>float(input) { |
| <span class="prelude-val">Some</span>(ParsedItem(input, (second, <span class="prelude-val">None</span>))) => (input, second, <span class="number">0</span>), |
| <span class="prelude-val">Some</span>(ParsedItem(input, (second, <span class="prelude-val">Some</span>(fractional_part)))) => ( |
| input, |
| second, |
| round(fractional_part * Nanosecond.per(Second) <span class="kw">as </span>f64) <span class="kw">as _</span>, |
| ), |
| <span class="prelude-val">None </span><span class="kw">if </span>extended_kind.is_extended() => { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(error::Parse::ParseFromDescription(InvalidComponent( |
| <span class="string">"second"</span>, |
| ))); |
| } |
| <span class="comment">// Missing components are assumed to be zero. |
| </span><span class="prelude-val">None </span>=> (input, <span class="number">0</span>, <span class="number">0</span>), |
| }; |
| <span class="kw-2">*</span>parsed = parsed |
| .with_second(second) |
| .ok_or(InvalidComponent(<span class="string">"second"</span>))<span class="question-mark">? |
| </span>.with_subsecond(subsecond) |
| .ok_or(InvalidComponent(<span class="string">"subsecond"</span>))<span class="question-mark">?</span>; |
| |
| <span class="prelude-val">Ok</span>(input) |
| } |
| } |
| |
| <span class="comment">// Basic: [±][hour][min] or ["Z"] |
| // Extended: [±][hour][":"][min] or ["Z"] |
| // Reduced precision: [±][hour] or ["Z"] |
| </span><span class="doccomment">/// Parse a UTC offset in the basic or extended format. Reduced precision is supported. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>parse_offset<<span class="lifetime">'a</span>>( |
| parsed: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>Parsed, |
| extended_kind: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>ExtendedKind, |
| ) -> <span class="kw">impl </span>FnMut(<span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Result</span><<span class="kw-2">&</span>[u8], error::Parse> + <span class="lifetime">'a </span>{ |
| <span class="kw">move </span>|input| { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(ParsedItem(input, ())) = ascii_char::<<span class="string">b'Z'</span>>(input) { |
| <span class="kw-2">*</span>parsed = parsed |
| .with_offset_hour(<span class="number">0</span>) |
| .ok_or(InvalidComponent(<span class="string">"offset hour"</span>))<span class="question-mark">? |
| </span>.with_offset_minute_signed(<span class="number">0</span>) |
| .ok_or(InvalidComponent(<span class="string">"offset minute"</span>))<span class="question-mark">? |
| </span>.with_offset_second_signed(<span class="number">0</span>) |
| .ok_or(InvalidComponent(<span class="string">"offset second"</span>))<span class="question-mark">?</span>; |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(input); |
| } |
| |
| <span class="kw">let </span>ParsedItem(input, sign) = sign(input).ok_or(InvalidComponent(<span class="string">"offset hour"</span>))<span class="question-mark">?</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>input = hour(input) |
| .and_then(|parsed_item| { |
| parsed_item.consume_value(|hour| { |
| parsed.set_offset_hour(<span class="kw">if </span>sign == <span class="string">b'-' </span>{ |
| -(hour <span class="kw">as </span>i8) |
| } <span class="kw">else </span>{ |
| hour <span class="kw">as _ |
| </span>}) |
| }) |
| }) |
| .ok_or(InvalidComponent(<span class="string">"offset hour"</span>))<span class="question-mark">?</span>; |
| |
| <span class="kw">if </span>extended_kind.maybe_extended() { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(ParsedItem(new_input, ())) = ascii_char::<<span class="string">b':'</span>>(input) { |
| extended_kind |
| .coerce_extended() |
| .ok_or(InvalidComponent(<span class="string">"offset minute"</span>))<span class="question-mark">?</span>; |
| input = new_input; |
| }; |
| } |
| |
| <span class="kw">let </span>input = min(input) |
| .and_then(|parsed_item| { |
| parsed_item.consume_value(|min| { |
| parsed.set_offset_minute_signed(<span class="kw">if </span>sign == <span class="string">b'-' </span>{ |
| -(min <span class="kw">as </span>i8) |
| } <span class="kw">else </span>{ |
| min <span class="kw">as _ |
| </span>}) |
| }) |
| }) |
| .ok_or(InvalidComponent(<span class="string">"offset minute"</span>))<span class="question-mark">?</span>; |
| <span class="comment">// If `:` was present, the format has already been set to extended. As such, this call |
| // will do nothing in that case. If there wasn't `:` but minutes were |
| // present, we know it's the basic format. Do not use `?` on the call, as |
| // returning `None` is valid behavior. |
| </span>extended_kind.coerce_basic(); |
| |
| <span class="prelude-val">Ok</span>(input) |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Round wrapper that uses hardware implementation if `std` is available, falling back to manual |
| /// implementation for `no_std` |
| </span><span class="kw">fn </span>round(value: f64) -> f64 { |
| <span class="attribute">#[cfg(feature = <span class="string">"std"</span>)] |
| </span>{ |
| value.round() |
| } |
| <span class="attribute">#[cfg(not(feature = <span class="string">"std"</span>))] |
| </span>{ |
| round_impl(value) |
| } |
| } |
| |
| <span class="attribute">#[cfg(not(feature = <span class="string">"std"</span>))] |
| #[allow(clippy::missing_docs_in_private_items)] |
| </span><span class="kw">fn </span>round_impl(value: f64) -> f64 { |
| <span class="macro">debug_assert!</span>(value.is_sign_positive() && !value.is_nan()); |
| |
| <span class="kw">let </span>f = value % <span class="number">1.</span>; |
| <span class="kw">if </span>f < <span class="number">0.5 </span>{ value - f } <span class="kw">else </span>{ value - f + <span class="number">1. </span>} |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="time" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
