//! <script>
//! IFRAME('https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html');
//! </script>
use core::{fmt, str::FromStr};

use crate::{ast::SimpleAttri, expression::logic, types::MaxMin};

/// # Combinational Timing Arcs
///
/// The timing type and timing sense define the signal propagation pattern.
/// The default timing type is combinational. Table shows the timing
/// type and timing sense values for combinational timing arcs.
/// The default timing type is combinational.
/// <a name ="reference_link" href="
/// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
/// ?field=test
/// &bgn
/// =331.4
/// &end
/// =331.8
/// ">Reference</a>
/// <script>
/// IFRAME('https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html');
/// </script>
///
/// <table>
///     <thead>
///         <tr>
///             <th>Timing type</th>
///             <th></th>
///             <th>Timing sense</th>
///             <th></th>
///         </tr>
///         <tr>
///             <th></th>
///             <th><code>positive_unate</code></th>
///             <th><code>negative_unate</code></th>
///             <th><code>non_unate</code></th>
///         </tr>
///     </thead>
///     <tbody>
///         <tr>
///             <td><code>combinational</code></td>
///             <td>R->R, F->F</td>
///             <td>R->F, F->R</td>
///             <td>{R,F}->{R,F}</td>
///         </tr>
///         <tr>
///             <td><code>combinational_rise</code></td>
///             <td>R->R</td>
///             <td>F->R</td>
///             <td>{R,F}->R</td>
///         </tr>
///         <tr>
///             <td><code>combinational_fall</code></td>
///             <td>F->F</td>
///             <td>R->F</td>
///             <td>{R,F}->F</td>
///         </tr>
///         <tr>
///             <td><code>three_state_disable</code></td>
///             <td>R->{0Z,1Z}</td>
///             <td>F->{0Z,1Z}</td>
///             <td>{R,F}->{0Z,1Z}</td>
///         </tr>
///         <tr>
///             <td><code>three_state_enable</code></td>
///             <td>R->{Z0,Z1}</td>
///             <td>F->{Z0,Z1}</td>
///             <td>{R,F}->{Z0,Z1}</td>
///         </tr>
///         <tr>
///             <td><code>three_state_disable_rise</code></td>
///             <td>R->0Z</td>
///             <td>F->0Z</td>
///             <td>{R,F}->0Z</td>
///         </tr>
///         <tr>
///             <td><code>three_state_disable_fall</code></td>
///             <td>R->1Z</td>
///             <td>F->1Z</td>
///             <td>{R,F}->1Z</td>
///         </tr>
///         <tr>
///             <td><code>three_state_enable_rise</code></td>
///             <td>R->Z1</td>
///             <td>F->Z1</td>
///             <td>{R,F}->Z1</td>
///         </tr>
///         <tr>
///             <td><code>three_state_enable_fall</code></td>
///             <td>R->Z0</td>
///             <td>F->Z0</td>
///             <td>{R,F}->Z0</td>
///         </tr>
///     </tbody>
/// </table>
#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq, PartialOrd, Ord)]
#[derive(serde::Serialize, serde::Deserialize)]
pub enum ArcCombinational {
  /// `combinational`(`Defualt`)/
  /// `combinational_rise`/
  /// `combinational_fall`
  ///
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =331.11
  /// &end
  /// =331.13
  /// ">Reference</a>
  Combinational(Option<logic::Edge>),
  /// `three_state_disable`/
  /// `three_state_disable_rise`/
  /// `three_state_disable_fall`
  ///
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =331.14
  /// +331.16
  /// &end
  /// =331.14
  /// +331.17
  /// ">Reference</a>
  ThreeStateDisable(Option<logic::Edge>),
  /// `three_state_enable`/
  /// `three_state_enable_rise`/
  /// `three_state_enable_fall`
  ///
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =331.15
  /// +331.18
  /// &end
  /// =331.15
  /// +331.19
  /// ">Reference</a>
  ThreeStateEnable(Option<logic::Edge>),
}

impl ArcCombinational {
  const COMBINATIONAL: &'static str = "combinational";
  const COMBINATIONAL_RISE: &'static str = "combinational_rise";
  const COMBINATIONAL_FALL: &'static str = "combinational_fall";
  const THREE_STATE_DISABLE: &'static str = "three_state_disable";
  const THREE_STATE_DISABLE_RISE: &'static str = "three_state_disable_rise";
  const THREE_STATE_DISABLE_FALL: &'static str = "three_state_disable_fall";
  const THREE_STATE_ENABLE: &'static str = "three_state_enable";
  const THREE_STATE_ENABLE_RISE: &'static str = "three_state_enable_rise";
  const THREE_STATE_ENABLE_FALL: &'static str = "three_state_enable_fall";
}

impl fmt::Display for ArcCombinational {
  #[inline]
  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
    match self {
      Self::Combinational(edge) => match edge {
        Some(_edge) => match _edge {
          logic::Edge::Fall => write!(f, "{}", Self::COMBINATIONAL_FALL),
          logic::Edge::Rise => write!(f, "{}", Self::COMBINATIONAL_RISE),
        },
        None => write!(f, "{}", Self::COMBINATIONAL),
      },
      Self::ThreeStateDisable(edge) => match edge {
        Some(_edge) => match _edge {
          logic::Edge::Fall => write!(f, "{}", Self::THREE_STATE_DISABLE_FALL),
          logic::Edge::Rise => write!(f, "{}", Self::THREE_STATE_DISABLE_RISE),
        },
        None => write!(f, "{}", Self::THREE_STATE_DISABLE),
      },
      Self::ThreeStateEnable(edge) => match edge {
        Some(_edge) => match _edge {
          logic::Edge::Fall => write!(f, "{}", Self::THREE_STATE_ENABLE_FALL),
          logic::Edge::Rise => write!(f, "{}", Self::THREE_STATE_ENABLE_RISE),
        },
        None => write!(f, "{}", Self::THREE_STATE_ENABLE),
      },
    }
  }
}

/// # Sequential Timing Arcs
///
/// <a name ="reference_link" href="
/// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
/// ?field=test
/// &bgn
/// =331.20
/// &end
/// =333.29
/// ">Reference</a>
/// <script>
/// IFRAME('https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html');
/// </script>
///
/// ## Example
/// A sample library with the `timing_type` attribute and `minimum_pulse_width` and `minimum_period` values.
/// ``` liberty
/// library(ASIC) {  
///     ...  
///     delay_model : table_lookup;  
///     ...  
///     lu_table_template(pulse_width_template) {  
///         variable_1 : related_pin_transition;  
///         index_1 ("1.0, 2.0, 3.0");  
///     }  
///     cell(flop) {  
///         ...   
///         pin(CK) {  
///             direction : input;  
///             capacitance : 0.00707171;  
///             timing() {  
///                 timing_type : "min_pulse_width";  
///                 related_pin : "CK";  
///                 ...  
///                 rise_constraint("pulse_width_template") {  
///                     index_1("0.000000, 1.000000, 2.00000");  
///                     values ("6.000000, 6.250000, 7.2500000" );  
///                 }  
///                 fall_constraint("pulse_width_template") {  
///                     index_1("0.000000, 1.000000, 2.00000");  
///                     values ("6.000000, 6.250000, 7.2500000" );  
///                 }  
///             }  
///             timing() {  
///                 timing_type : "minimum_period";  
///                 related_pin : "CK";  
///                 rise_constraint("pulse_width_template") {  
///                     index_1(" .000000, 1.000000, 2.00000");  
///                     values ("6.000000, 6.250000, 7.2500000" );  
///                 }  
///                 fall_constraint("pulse_width_template") {  
///                     index_1("0.000000, 1.000000, 2.00000");  
///                     values ("6.000000, 6.250000, 7.2500000" );  
///                 }  
///             }  
///         }  
///     ...  
///     } /* end cell */
/// } /* end library */
/// ```
#[derive(Debug, Clone, Copy, PartialEq, Hash, Eq, PartialOrd, Ord)]
#[derive(serde::Serialize, serde::Deserialize)]
pub enum ArcSequential {
  /// `rising_edge`/
  /// `falling_edge`
  ///
  /// Identifies a timing arc whose output pin is sensitive to a
  /// `rising`/`falling` signal at the input pin.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =331.21
  /// +331.24
  /// &end
  /// =331.23
  /// +331.26
  /// ">Reference</a>
  Edge(logic::Edge),
  /// `preset`
  ///
  /// Preset arcs affect only the rise arrival time of the arc’s endpoint pin.
  /// A preset arc implies that you are asserting a logic 1 on the output pin
  /// when the designated `related_pin` is asserted.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =331.27
  /// &end
  /// =331.30
  /// ">Reference</a>
  Preset,
  /// `clear`
  ///
  /// Clear arcs affect only the fall arrival time of the arc’s endpoint pin.
  /// A clear arc implies that you are asserting a logic 0 on the output pin
  /// when the designated `related_pin` is asserted.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =332.2
  /// &end
  /// =332.5
  /// ">Reference</a>
  Clear,
  /// `hold_rising`/
  /// `hold_falling`
  ///
  /// Designates the `rising`/`falling` edge of the related pin for the hold check.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =332.6
  /// +332.8
  /// &end
  /// =332.7
  /// +332.9
  /// ">Reference</a>
  Hold(logic::Edge),
  /// `setup_rising`/
  /// `setup_falling`
  ///
  /// Designates the `rising`/`falling` edge of the related pin for the setup check
  /// on clocked elements.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =332.10
  /// +332.13
  /// &end
  /// =332.12
  /// +332.15
  /// ">Reference</a>
  Setup(logic::Edge),
  /// `recovery_rising`/
  /// `recovery_falling`
  ///
  /// Uses the rising edge of the related pin for the recovery time check.
  /// The clock is `rising-edge-triggered`/`falling-edge-triggered`.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =332.16
  /// +332.19
  /// &end
  /// =332.18
  /// +332.21
  /// ">Reference</a>
  Recovery(logic::Edge),
  /// `skew_rising`/
  /// `skew_falling`
  ///
  /// The timing constraint interval is measured from the rising edge of the
  /// reference pin (specified in `related_pin`) to a transition edge of the
  /// parent pin of the timing group.
  ///
  /// The `intrinsic_rise`  value is the maximum skew time between the
  /// reference pin `rising`/`falling` and the parent pin rising.
  ///
  /// The `intrinsic_fall` value is the maximum skew time between the
  /// reference pin `rising`/`falling` and the parent pin falling.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =332.22
  /// +332.28
  /// &end
  /// =332.27
  /// +332.33
  /// ">Reference</a>
  Skew(logic::Edge),
  /// `removal_rising`/
  /// `removal_falling`
  ///
  /// Used when the cell is a `low-enable`/`high-enable` latch or a
  /// `rising-edge-triggered`/`falling-edge-triggered` flip-flop.
  ///
  /// For active-low asynchronous control signals, define the removal
  /// time with the `intrinsic_rise` attribute.
  ///
  /// For active-high asynchronous control signals, define the removal
  /// time with the `intrinsic_fall` attribute.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =333.2
  /// +333.7
  /// &end
  /// =333.6
  /// +333.11
  /// ">Reference</a>
  Removal(logic::Edge),
  /// `min_pulse_width`
  ///
  /// This value lets you specify the minimum pulse width for a clock pin.
  /// The timing check is performed on the pin itself, so the `related pin`
  /// should be the same. You need to specify both rise and fall constraints
  /// to calculate the high and low pulse widths.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =333.12
  /// &end
  /// =333.16
  /// ">Reference</a>
  MinPulseWidth,
  /// `minimum_period`
  ///
  /// This value lets you specify the minimum period for a clock pin.
  /// The timing check is performed on the pin itself, so the `related pin`
  /// should be the same. You need to specify both rise and fall constraints
  /// to calculate the minimum clock period.
  ///
  /// Rise constraint is characterization data when the clock waveform has a
  /// rising start edge. Fall constraint is characterization data when the
  /// start edge of a waveform is falling.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =333.17
  /// &end
  /// =333.23
  /// ">Reference</a>
  MinimumPeriod,
  /// `max_clock_tree_path`/
  /// `min_clock_tree_path`
  ///
  /// Used in `timing` groups under a clock pin. Defines the `maximum`/`minimum`
  /// clock tree path constraint.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =333.24
  /// +333.27
  /// &end
  /// =333.26
  /// +333.28
  /// ">Reference</a>
  ClockTreePath(MaxMin),
}

impl ArcSequential {
  const RISING_EDGE: &'static str = "rising_edge";
  const FALLING_EDGE: &'static str = "falling_edge";
  const PRESET: &'static str = "preset";
  const CLEAR: &'static str = "clear";
  const HOLD_RISING: &'static str = "hold_rising";
  const HOLD_FALLING: &'static str = "hold_falling";
  const SETUP_RISING: &'static str = "setup_rising";
  const SETUP_FALLING: &'static str = "setup_falling";
  const RECOVERY_RISING: &'static str = "recovery_rising";
  const RECOVERY_FALLING: &'static str = "recovery_falling";
  const SKEW_RISING: &'static str = "skew_rising";
  const SKEW_FALLING: &'static str = "skew_falling";
  const REMOVAL_RISING: &'static str = "removal_rising";
  const REMOVAL_FALLING: &'static str = "removal_falling";
  const MIN_PULSE_WIDTH: &'static str = "min_pulse_width";
  const MINIMUM_PERIOD: &'static str = "minimum_period";
  const MAX_CLOCK_TREE_PATH: &'static str = "max_clock_tree_path";
  const MIN_CLOCK_TREE_PATH: &'static str = "min_clock_tree_path";
}

impl fmt::Display for ArcSequential {
  #[inline]
  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
    match self {
      Self::Edge(edge) => match edge {
        logic::Edge::Fall => write!(f, "{}", Self::FALLING_EDGE),
        logic::Edge::Rise => write!(f, "{}", Self::RISING_EDGE),
      },
      Self::Preset => write!(f, "{}", Self::PRESET),
      Self::Clear => write!(f, "{}", Self::CLEAR),
      Self::Hold(edge) => match edge {
        logic::Edge::Fall => write!(f, "{}", Self::HOLD_FALLING),
        logic::Edge::Rise => write!(f, "{}", Self::HOLD_RISING),
      },
      Self::Setup(edge) => match edge {
        logic::Edge::Fall => write!(f, "{}", Self::SETUP_FALLING),
        logic::Edge::Rise => write!(f, "{}", Self::SETUP_RISING),
      },
      Self::Recovery(edge) => match edge {
        logic::Edge::Fall => write!(f, "{}", Self::RECOVERY_FALLING),
        logic::Edge::Rise => write!(f, "{}", Self::RECOVERY_RISING),
      },
      Self::Skew(edge) => match edge {
        logic::Edge::Fall => write!(f, "{}", Self::SKEW_FALLING),
        logic::Edge::Rise => write!(f, "{}", Self::SKEW_RISING),
      },
      Self::Removal(edge) => match edge {
        logic::Edge::Fall => write!(f, "{}", Self::REMOVAL_FALLING),
        logic::Edge::Rise => write!(f, "{}", Self::REMOVAL_RISING),
      },
      Self::MinPulseWidth => write!(f, "{}", Self::MIN_PULSE_WIDTH),
      Self::MinimumPeriod => write!(f, "{}", Self::MINIMUM_PERIOD),
      Self::ClockTreePath(max_min) => match max_min {
        MaxMin::Max => write!(f, "{}", Self::MAX_CLOCK_TREE_PATH),
        MaxMin::Min => write!(f, "{}", Self::MIN_CLOCK_TREE_PATH),
      },
    }
  }
}

/// # Nonsequential Timing Arcs
///
/// In some nonsequential cells, the setup and hold timing constraints are specified
/// on the data pin with a nonclock pin as the related pin. It requires the signal of
/// a pin to be stable for a specified period of time before and after another pin of
/// the same cell range state so that the cell can function as expected.
/// <a name ="reference_link" href="
/// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
/// ?field=test
/// &bgn
/// =335.29
/// &end
/// =335.37
/// ">Reference</a>
/// <script>
/// IFRAME('https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html');
/// </script>
#[derive(Debug, Clone, Copy, PartialEq, Hash, Eq, PartialOrd, Ord)]
#[derive(serde::Serialize, serde::Deserialize)]
pub enum ArcNonSequential {
  /// `non_seq_setup_rising`/
  /// `non_seq_setup_falling`
  ///
  /// Defines (with `non_seq_setup_falling`/`non_seq_setup_rising`) the timing arcs used
  /// for setup checks between pins with nonsequential behavior. The related pin in
  /// a timing arc is used for the timing check.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =335.34
  /// +335.38
  /// &end
  /// =335.37
  /// +335.41
  /// ">Reference</a>
  NonSeqSetup(logic::Edge),
  /// `non_seq_hold_rising`/
  /// `non_seq_hold_falling`
  ///
  /// Defines (with `non_seq_hold_falling`/`non_seq_hold_rising`) the timing arcs used
  /// for hold checks between pins with nonsequential behavior. The related pin in
  /// a timing arc is used for the timing check.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =335.42
  /// +336.2
  /// &end
  /// =335.45
  /// +336.5
  /// ">Reference</a>
  NonSeqHold(logic::Edge),
}

impl ArcNonSequential {
  const NON_SEQ_SETUP_RISING: &'static str = "non_seq_setup_rising";
  const NON_SEQ_SETUP_FALLING: &'static str = "non_seq_setup_falling";
  const NON_SEQ_HOLD_RISING: &'static str = "non_seq_hold_rising";
  const NON_SEQ_HOLD_FALLING: &'static str = "non_seq_hold_falling";
}

impl fmt::Display for ArcNonSequential {
  #[inline]
  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
    match self {
      Self::NonSeqSetup(edge) => match edge {
        logic::Edge::Fall => write!(f, "{}", Self::NON_SEQ_SETUP_FALLING),
        logic::Edge::Rise => write!(f, "{}", Self::NON_SEQ_SETUP_RISING),
      },
      Self::NonSeqHold(edge) => match edge {
        logic::Edge::Fall => write!(f, "{}", Self::NON_SEQ_HOLD_FALLING),
        logic::Edge::Rise => write!(f, "{}", Self::NON_SEQ_HOLD_RISING),
      },
    }
  }
}

/// # No-Change Timing Arcs
///
/// This feature models the timing requirement of latch devices with latch-enable signals.
/// The four no-change timing types define the pulse waveforms of both the constrained signal
/// and the related signal in standard CMOS and nonlinear CMOS delay models.
/// The information is used in static timing verification during synthesis.
/// <a name ="reference_link" href="
/// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
/// ?field=test
/// &bgn
/// =336.6
/// &end
/// =336.10
/// ">Reference</a>
/// <script>
/// IFRAME('https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html');
/// </script>
#[derive(Debug, Clone, Copy, PartialEq, Hash, Eq, PartialOrd, Ord)]
#[derive(serde::Serialize, serde::Deserialize)]
pub enum ArcNoChange {
  /// `nochange_high_high`/
  /// `nochange_high_low`/
  /// `nochange_low_high`/
  /// `nochange_low_low`
  ///
  /// Indicates a `positive`/`positive`/`negative`/`negative` pulse on the constrained pin
  /// and a `positive`/`negative`/`positive`/`negative` pulse on the related pin.
  /// <a name ="reference_link" href="
  /// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
  /// ?field=test
  /// &bgn
  /// =336.11
  /// +336.14
  /// +336.17
  /// +336.20
  /// &end
  /// =336.13
  /// +336.16
  /// +336.19
  /// +336.22
  /// ">Reference</a>
  NoChange(logic::Level, logic::Level),
}

impl ArcNoChange {
  const NOCHANGE_HIGH_HIGH: &'static str = "nochange_high_high";
  const NOCHANGE_HIGH_LOW: &'static str = "nochange_high_low";
  const NOCHANGE_LOW_HIGH: &'static str = "nochange_low_high";
  const NOCHANGE_LOW_LOW: &'static str = "nochange_low_low";
}

impl fmt::Display for ArcNoChange {
  #[inline]
  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
    match self {
      Self::NoChange(s1, s2) => match (s1, s2) {
        (logic::Level::High, logic::Level::High) => {
          write!(f, "{}", Self::NOCHANGE_HIGH_HIGH)
        }
        (logic::Level::High, logic::Level::Low) => {
          write!(f, "{}", Self::NOCHANGE_HIGH_LOW)
        }
        (logic::Level::Low, logic::Level::High) => {
          write!(f, "{}", Self::NOCHANGE_LOW_HIGH)
        }
        (logic::Level::Low, logic::Level::Low) => {
          write!(f, "{}", Self::NOCHANGE_LOW_LOW)
        }
      },
    }
  }
}

/// The `timing_type` attribute distinguishes between combinational
/// and sequential cells by defining the type of timing arc.
/// If this attribute is not assigned, the cell is considered combinational (Default).
/// <a name ="reference_link" href="
/// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
/// ?field=test
/// &bgn
/// =330.7
/// &end
/// =330.37
/// ">Reference-Difinition</a>
/// <a name ="reference_link" href="
/// https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html
/// ?field=test
/// &bgn
/// =320.20
/// &end
/// =320.34
/// ">Reference-Instance</a>
/// <script>
/// IFRAME('https://zao111222333.github.io/liberty-db/2020.09/reference_manual.html');
/// </script>
///
/// You must distinguish between combinational and sequential timing types,
/// because each type serves a different purpose.
///
/// The Design Compiler tool uses the combinational timing arcs information to calculate
/// the physical delays in timing propagation and to trace paths. The timing analyzer uses
/// path-tracing arcs for circuit timing analysis.
///
/// The Design Compiler tool uses the sequential timing arcs information to determine
/// rule-based design optimization constraints. More information on optimization
/// constraints is available in the Design Compiler documentation.
///
/// The following sections show the `timing_type` attribute values for the following
/// timing arcs. For information about when to use the different types, see the
/// *Synopsys Liberty User Guide*.
///
/// + [`Combinational`](crate::timing::ArcCombinational)
/// + [`Sequential`](crate::timing::ArcSequential)
/// + [`NonSequential`](crate::timing::ArcNonSequential)
/// + [`NoChange`](crate::timing::ArcNoChange)
///
/// #### Syntax
/// `timing_type : combinational | combinational_rise | combinational_fall | three_state_disable |
/// three_state_disable_rise | three_state_disable_fall | three_state_enable | three_state_enable_rise |
/// three_state_enable_fall | rising_edge | falling_edge | preset | clear | hold_rising | hold_falling |
/// setup_rising | setup_falling | recovery_rising | recovery_falling | skew_rising | skew_falling |
/// removal_rising | removal_falling | min_pulse_width | minimum_period | max_clock_tree_path |
/// min_clock_tree_path |non_seq_setup_rising | non_seq_setup_falling | non_seq_hold_rising |
/// non_seq_hold_falling | nochange_high_high | nochange_high_low | nochange_low_high | nochange_low_low ;`
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
// #[derive(liberty_macros::SingleSimple)]
#[derive(serde::Serialize, serde::Deserialize)]
pub enum TimingType {
  /// [`Combinational`](crate::timing::ArcCombinational)
  Combinational(ArcCombinational),
  /// [`Sequential`](crate::timing::ArcSequential)
  Sequential(ArcSequential),
  /// [`NonSequential`](crate::timing::ArcNonSequential)
  NonSequential(ArcNonSequential),
  /// [`NoChange`](crate::timing::ArcNoChange)
  NoChange(ArcNoChange),
}

impl SimpleAttri for TimingType {
  #[inline]
  fn nom_parse<'a>(
    i: &'a str,
    line_num: &mut usize,
  ) -> crate::ast::SimpleParseErr<'a, Self> {
    crate::ast::nom_parse_from_str(i, line_num)
  }
}

impl FromStr for TimingType {
  type Err = fmt::Error;
  #[inline]
  fn from_str(s: &str) -> Result<Self, Self::Err> {
    match s {
      ArcCombinational::COMBINATIONAL => Ok(Self::COMBINATIONAL),
      ArcCombinational::COMBINATIONAL_RISE => Ok(Self::COMBINATIONAL_RISE),
      ArcCombinational::COMBINATIONAL_FALL => Ok(Self::COMBINATIONAL_FALL),
      ArcCombinational::THREE_STATE_DISABLE => Ok(Self::THREE_STATE_DISABLE),
      ArcCombinational::THREE_STATE_DISABLE_RISE => Ok(Self::THREE_STATE_DISABLE_RISE),
      ArcCombinational::THREE_STATE_DISABLE_FALL => Ok(Self::THREE_STATE_DISABLE_FALL),
      ArcCombinational::THREE_STATE_ENABLE => Ok(Self::THREE_STATE_ENABLE),
      ArcCombinational::THREE_STATE_ENABLE_RISE => Ok(Self::THREE_STATE_ENABLE_RISE),
      ArcCombinational::THREE_STATE_ENABLE_FALL => Ok(Self::THREE_STATE_ENABLE_FALL),
      ArcSequential::RISING_EDGE => Ok(Self::RISING_EDGE),
      ArcSequential::FALLING_EDGE => Ok(Self::FALLING_EDGE),
      ArcSequential::PRESET => Ok(Self::PRESET),
      ArcSequential::CLEAR => Ok(Self::CLEAR),
      ArcSequential::HOLD_RISING => Ok(Self::HOLD_RISING),
      ArcSequential::HOLD_FALLING => Ok(Self::HOLD_FALLING),
      ArcSequential::SETUP_RISING => Ok(Self::SETUP_RISING),
      ArcSequential::SETUP_FALLING => Ok(Self::SETUP_FALLING),
      ArcSequential::RECOVERY_RISING => Ok(Self::RECOVERY_RISING),
      ArcSequential::RECOVERY_FALLING => Ok(Self::RECOVERY_FALLING),
      ArcSequential::SKEW_RISING => Ok(Self::SKEW_RISING),
      ArcSequential::SKEW_FALLING => Ok(Self::SKEW_FALLING),
      ArcSequential::REMOVAL_RISING => Ok(Self::REMOVAL_RISING),
      ArcSequential::REMOVAL_FALLING => Ok(Self::REMOVAL_FALLING),
      ArcSequential::MIN_PULSE_WIDTH => Ok(Self::MIN_PULSE_WIDTH),
      ArcSequential::MINIMUM_PERIOD => Ok(Self::MINIMUM_PERIOD),
      ArcSequential::MAX_CLOCK_TREE_PATH => Ok(Self::MAX_CLOCK_TREE_PATH),
      ArcSequential::MIN_CLOCK_TREE_PATH => Ok(Self::MIN_CLOCK_TREE_PATH),
      ArcNonSequential::NON_SEQ_SETUP_RISING => Ok(Self::NON_SEQ_SETUP_RISING),
      ArcNonSequential::NON_SEQ_SETUP_FALLING => Ok(Self::NON_SEQ_SETUP_FALLING),
      ArcNonSequential::NON_SEQ_HOLD_RISING => Ok(Self::NON_SEQ_HOLD_RISING),
      ArcNonSequential::NON_SEQ_HOLD_FALLING => Ok(Self::NON_SEQ_HOLD_FALLING),
      ArcNoChange::NOCHANGE_HIGH_HIGH => Ok(Self::NOCHANGE_HIGH_HIGH),
      ArcNoChange::NOCHANGE_HIGH_LOW => Ok(Self::NOCHANGE_HIGH_LOW),
      ArcNoChange::NOCHANGE_LOW_HIGH => Ok(Self::NOCHANGE_LOW_HIGH),
      ArcNoChange::NOCHANGE_LOW_LOW => Ok(Self::NOCHANGE_LOW_LOW),
      _ => Err(fmt::Error),
    }
  }
}

impl fmt::Display for TimingType {
  #[inline]
  fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
    match self {
      Self::Combinational(t) => t.fmt(f),
      Self::Sequential(t) => t.fmt(f),
      Self::NonSequential(t) => t.fmt(f),
      Self::NoChange(t) => t.fmt(f),
    }
  }
}

impl TimingType {
  /// `COMBINATIONAL`
  pub const COMBINATIONAL: Self =
    Self::Combinational(ArcCombinational::Combinational(None));
  /// `COMBINATIONAL_RISE`
  pub const COMBINATIONAL_RISE: Self =
    Self::Combinational(ArcCombinational::Combinational(Some(logic::Edge::Rise)));
  /// `COMBINATIONAL_FALL`
  pub const COMBINATIONAL_FALL: Self =
    Self::Combinational(ArcCombinational::Combinational(Some(logic::Edge::Fall)));
  /// `THREE_STATE_DISABLE`
  pub const THREE_STATE_DISABLE: Self =
    Self::Combinational(ArcCombinational::ThreeStateDisable(None));
  /// `THREE_STATE_DISABLE_RISE`
  pub const THREE_STATE_DISABLE_RISE: Self =
    Self::Combinational(ArcCombinational::ThreeStateDisable(Some(logic::Edge::Rise)));
  /// `THREE_STATE_DISABLE_FALL`
  pub const THREE_STATE_DISABLE_FALL: Self =
    Self::Combinational(ArcCombinational::ThreeStateDisable(Some(logic::Edge::Fall)));
  /// `THREE_STATE_ENABLE`
  pub const THREE_STATE_ENABLE: Self =
    Self::Combinational(ArcCombinational::ThreeStateEnable(None));
  /// `THREE_STATE_ENABLE_RISE`
  pub const THREE_STATE_ENABLE_RISE: Self =
    Self::Combinational(ArcCombinational::ThreeStateEnable(Some(logic::Edge::Rise)));
  /// `THREE_STATE_ENABLE_FALL`
  pub const THREE_STATE_ENABLE_FALL: Self =
    Self::Combinational(ArcCombinational::ThreeStateEnable(Some(logic::Edge::Fall)));
  /// `RISING_EDGE`
  pub const RISING_EDGE: Self = Self::Sequential(ArcSequential::Edge(logic::Edge::Rise));
  /// `FALLING_EDGE`
  pub const FALLING_EDGE: Self = Self::Sequential(ArcSequential::Edge(logic::Edge::Fall));
  /// `PRESET`
  pub const PRESET: Self = Self::Sequential(ArcSequential::Preset);
  /// `CLEAR`
  pub const CLEAR: Self = Self::Sequential(ArcSequential::Clear);
  /// `HOLD_RISING`
  pub const HOLD_RISING: Self = Self::Sequential(ArcSequential::Hold(logic::Edge::Rise));
  /// `HOLD_FALLING`
  pub const HOLD_FALLING: Self = Self::Sequential(ArcSequential::Hold(logic::Edge::Fall));
  /// `SETUP_RISING`
  pub const SETUP_RISING: Self =
    Self::Sequential(ArcSequential::Setup(logic::Edge::Rise));
  /// `SETUP_FALLING`
  pub const SETUP_FALLING: Self =
    Self::Sequential(ArcSequential::Setup(logic::Edge::Fall));
  /// `RECOVERY_RISING`
  pub const RECOVERY_RISING: Self =
    Self::Sequential(ArcSequential::Recovery(logic::Edge::Rise));
  /// `RECOVERY_FALLING`
  pub const RECOVERY_FALLING: Self =
    Self::Sequential(ArcSequential::Recovery(logic::Edge::Fall));
  /// `SKEW_RISING`
  pub const SKEW_RISING: Self = Self::Sequential(ArcSequential::Skew(logic::Edge::Rise));
  /// `SKEW_FALLING`
  pub const SKEW_FALLING: Self = Self::Sequential(ArcSequential::Skew(logic::Edge::Fall));
  /// `REMOVAL_RISING`
  pub const REMOVAL_RISING: Self =
    Self::Sequential(ArcSequential::Removal(logic::Edge::Rise));
  /// `REMOVAL_FALLING`
  pub const REMOVAL_FALLING: Self =
    Self::Sequential(ArcSequential::Removal(logic::Edge::Fall));
  /// `MIN_PULSE_WIDTH`
  pub const MIN_PULSE_WIDTH: Self = Self::Sequential(ArcSequential::MinPulseWidth);
  /// `MINIMUM_PERIOD`
  pub const MINIMUM_PERIOD: Self = Self::Sequential(ArcSequential::MinimumPeriod);
  /// `MAX_CLOCK_TREE_PATH`
  pub const MAX_CLOCK_TREE_PATH: Self =
    Self::Sequential(ArcSequential::ClockTreePath(MaxMin::Max));
  /// `MIN_CLOCK_TREE_PATH`
  pub const MIN_CLOCK_TREE_PATH: Self =
    Self::Sequential(ArcSequential::ClockTreePath(MaxMin::Min));
  /// `NON_SEQ_SETUP_RISING`
  pub const NON_SEQ_SETUP_RISING: Self =
    Self::NonSequential(ArcNonSequential::NonSeqSetup(logic::Edge::Rise));
  /// `NON_SEQ_SETUP_FALLING`
  pub const NON_SEQ_SETUP_FALLING: Self =
    Self::NonSequential(ArcNonSequential::NonSeqSetup(logic::Edge::Fall));
  /// `NON_SEQ_HOLD_RISING`
  pub const NON_SEQ_HOLD_RISING: Self =
    Self::NonSequential(ArcNonSequential::NonSeqHold(logic::Edge::Rise));
  /// `NON_SEQ_HOLD_FALLING`
  pub const NON_SEQ_HOLD_FALLING: Self =
    Self::NonSequential(ArcNonSequential::NonSeqHold(logic::Edge::Fall));
  /// `NOCHANGE_HIGH_HIGH`
  pub const NOCHANGE_HIGH_HIGH: Self =
    Self::NoChange(ArcNoChange::NoChange(logic::Level::High, logic::Level::High));
  /// `NOCHANGE_HIGH_LOW`
  pub const NOCHANGE_HIGH_LOW: Self =
    Self::NoChange(ArcNoChange::NoChange(logic::Level::High, logic::Level::Low));
  /// `NOCHANGE_LOW_HIGH`
  pub const NOCHANGE_LOW_HIGH: Self =
    Self::NoChange(ArcNoChange::NoChange(logic::Level::Low, logic::Level::High));
  /// `NOCHANGE_LOW_LOW`
  pub const NOCHANGE_LOW_LOW: Self =
    Self::NoChange(ArcNoChange::NoChange(logic::Level::Low, logic::Level::Low));
  const LIST: [Self; 35] = [
    Self::COMBINATIONAL,
    Self::COMBINATIONAL_RISE,
    Self::COMBINATIONAL_FALL,
    Self::THREE_STATE_DISABLE,
    Self::THREE_STATE_DISABLE_RISE,
    Self::THREE_STATE_DISABLE_FALL,
    Self::THREE_STATE_ENABLE,
    Self::THREE_STATE_ENABLE_RISE,
    Self::THREE_STATE_ENABLE_FALL,
    Self::RISING_EDGE,
    Self::FALLING_EDGE,
    Self::PRESET,
    Self::CLEAR,
    Self::HOLD_RISING,
    Self::HOLD_FALLING,
    Self::SETUP_RISING,
    Self::SETUP_FALLING,
    Self::RECOVERY_RISING,
    Self::RECOVERY_FALLING,
    Self::SKEW_RISING,
    Self::SKEW_FALLING,
    Self::REMOVAL_RISING,
    Self::REMOVAL_FALLING,
    Self::MIN_PULSE_WIDTH,
    Self::MINIMUM_PERIOD,
    Self::MAX_CLOCK_TREE_PATH,
    Self::MIN_CLOCK_TREE_PATH,
    Self::NON_SEQ_SETUP_RISING,
    Self::NON_SEQ_SETUP_FALLING,
    Self::NON_SEQ_HOLD_RISING,
    Self::NON_SEQ_HOLD_FALLING,
    Self::NOCHANGE_HIGH_HIGH,
    Self::NOCHANGE_HIGH_LOW,
    Self::NOCHANGE_LOW_HIGH,
    Self::NOCHANGE_LOW_LOW,
  ];
  /// `iter`
  #[inline]
  pub fn iter() -> impl Iterator<Item = Self> {
    Self::LIST.iter().copied()
  }
}