Struct ConfigValue 

pub(crate) struct ConfigValue {
    pub(crate) already_superscript: bool,
    pub(crate) expr: ArithmeticExpression,
}

An expression used to specify the configuration bits of an instruction.

A configuration syllable can be specified by putting it in a superscript, or by putting it in normal script after a ‖ symbol (‖x or ‖2, for example). This is described in section 6-2.1 of the Users Handbook.

In the description of the parts of an instruction (section 6-2.1, “INSTRUCTION WORDS” of the Users Handbook) we see the specification that the configuration syllable cannot contain any spaces. But this doesn’t prevent the config syllable containing, say, an arithmetic expression. Indeed, Leonard Kleinrock’s program for network simulation does exactly that (by using a negated symbol as a configuration value).

Fields

already_superscript: bool

Indicates that the value was already in superscript.

expr: ArithmeticExpression

Holds the configuration syllable value.

Implementations

impl ConfigValue

fn symbol_uses( &self, block_id: BlockIdentifier, block_offset: Unsigned18Bit, ) -> impl Iterator<Item = Result<(SymbolName, SimpleSpan, SymbolUse), InconsistentSymbolUse>> + use<>

fn substitute_macro_parameters( &self, param_values: &MacroParameterBindings, on_missing: OnUnboundMacroParameter, macros: &BTreeMap<SymbolName, MacroDefinition>, ) -> Option<ConfigValue>

fn allocate_rc_words<R: RcAllocator>( &mut self, explicit_symtab: &mut ExplicitSymbolTable, implicit_symtab: &mut ImplicitSymbolTable, rc_allocator: &mut R, ) -> Result<(), RcWordAllocationFailure>

Trait Implementations

impl Clone for ConfigValue

fn clone(&self) -> ConfigValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ConfigValue

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

Formats the value using the given formatter.

impl Evaluate for ConfigValue

fn evaluate<R: RcUpdater>( &self, ctx: &mut EvaluationContext<'_, R>, scope: ScopeIdentifier, ) -> Result<Unsigned36Bit, EvaluationFailure>

impl PartialEq for ConfigValue

fn eq(&self, other: &ConfigValue) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Spanned for ConfigValue

fn span(&self) -> SimpleSpan

impl Eq for ConfigValue

impl StructuralPartialEq for ConfigValue