Struct Handlers 

pub struct Handlers {
    pub conditions: HashMap<Condition, Handler>,
    pub stack: Vec<(HashMap<Condition, Handler>, Option<AbendExit>)>,
    pub abend: Option<AbendExit>,
}

HANDLE CONDITION, IGNORE CONDITION and HANDLE ABEND, which belong to the logical level: every program CALLed at it shares them (C234).

Fields

conditions: HashMap<Condition, Handler>

stack: Vec<(HashMap<Condition, Handler>, Option<AbendExit>)>

What each PUSH HANDLE at this logical level suspended.

abend: Option<AbendExit>

Implementations

impl Handlers

pub fn push(&mut self)

PUSH HANDLE: suspends HANDLE CONDITION, IGNORE CONDITION and HANDLE ABEND until pop.

pub fn pop(&mut self) -> bool

POP HANDLE: false when no PUSH HANDLE at this logical level is left to undo.

pub fn lend(&mut self, pushes: bool) -> Handlers

The handlers a CALLed program starts with: the level’s, which a dynamic CALL first suspends with the PUSH HANDLE of CBLPSHPOP(ON) (C234).

pub fn xctl(&mut self) -> Handlers

The handlers the program XCTL starts has: the level’s HANDLE ABEND exit and PUSH HANDLE stack, each exit the stack holds kept, and no HANDLE CONDITION or IGNORE CONDITION, which belong to the program XCTL releases, pushed or not (C146).

pub fn take_back(&mut self, callee: &mut Handlers, pops: bool)

Takes the level’s handlers back from a CALLed program that has ended, as it left them; with pops, for a dynamic CALL it returned from, the POP HANDLE that undoes the CALL’s PUSH, which changes nothing when no PUSH is left (C234).

Trait Implementations

impl Clone for Handlers

fn clone(&self) -> Handlers

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Handlers

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for Handlers

fn default() -> Handlers

Returns the “default value” for a type.