Struct lc3_ensemble::ast::Label

pub struct Label {
    pub name: String,
    /* private fields */
}

A label.

This struct stores the name of the label (accessible by the name field) and the source code span indicating where the label is located in assembly source code.

Examples

.orig x3000
AND R0, R0, #0
LD R2, VALUE
       ~~~~~
LOOP:
~~~~
    NOT R1, R2
    ADD R1, R1, #1
    ADD R1, R1, R0
    BRz END
        ~~~
    ADD R0, R0, #1
    BR LOOP
       ~~~~
END: HALT
~~~
VALUE: .fill #8464
~~~~~
.end

Fields

name: String

The label’s identifier

Implementations

impl Label

pub fn new(name: String, span: Range<usize>) -> Self

Creates a new label.

pub fn span(&self) -> Range<usize>

Returns the span of the label in assembly source code.

Trait Implementations

impl Clone for Label

fn clone(&self) -> Label

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Label

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

Formats the value using the given formatter.

impl Default for Label

fn default() -> Label

Returns the “default value” for a type.

impl Display for Label

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

Formats the value using the given formatter.

impl Hash for Label

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Label

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl TokenParse for Label

type Intermediate = Label

An intermediate to hold the match before it is converted to the actual component.

fn match_(m_token: Option<&Token>, span: Span) -> Result<Self, ParseErr>

Tries to match the next token to the given component, if possible.

fn convert(imed: Self::Intermediate, _span: Span) -> Result<Self, ParseErr>

Parses the intermediate into the given component, raising an error if conversion fails.

impl Eq for Label

impl StructuralPartialEq for Label