Enum cpclib_asm::preamble::tokens::Expr

pub enum Expr {
    Value(i32),
    String(String),
    Label(String),
    Duration(Box<Token>),
    OpCode(Box<Token>),
    Add(Box<Expr>, Box<Expr>),
    Sub(Box<Expr>, Box<Expr>),
    Mul(Box<Expr>, Box<Expr>),
    Div(Box<Expr>, Box<Expr>),
    Mod(Box<Expr>, Box<Expr>),
    BinaryAnd(Box<Expr>, Box<Expr>),
    BinaryOr(Box<Expr>, Box<Expr>),
    BinaryXor(Box<Expr>, Box<Expr>),
    Neg(Box<Expr>),
    Paren(Box<Expr>),
    Equal(Box<Expr>, Box<Expr>),
    LowerOrEqual(Box<Expr>, Box<Expr>),
    GreaterOrEqual(Box<Expr>, Box<Expr>),
    StrictlyGreater(Box<Expr>, Box<Expr>),
    StrictlyLower(Box<Expr>, Box<Expr>),
    UnaryFunction(UnaryFunction, Box<Expr>),
    BinaryFunction(BinaryFunction, Box<Expr>, Box<Expr>),
}

Expression nodes.

Variants

Value(i32)

32 bits integer value (should be able to include any integer value manipulated by the assember.

String(String)

String (for db directive)

Label(String)

Label

Duration(Box<Token>)

This expression node represents the duration of an instruction. The duration is compute at assembling and not at parsing in order to benefit of the symbol table

OpCode(Box<Token>)

Add(Box<Expr>, Box<Expr>)

Sub(Box<Expr>, Box<Expr>)

Mul(Box<Expr>, Box<Expr>)

Div(Box<Expr>, Box<Expr>)

Mod(Box<Expr>, Box<Expr>)

BinaryAnd(Box<Expr>, Box<Expr>)

BinaryOr(Box<Expr>, Box<Expr>)

BinaryXor(Box<Expr>, Box<Expr>)

Neg(Box<Expr>)

Paren(Box<Expr>)

Equal(Box<Expr>, Box<Expr>)

LowerOrEqual(Box<Expr>, Box<Expr>)

GreaterOrEqual(Box<Expr>, Box<Expr>)

StrictlyGreater(Box<Expr>, Box<Expr>)

StrictlyLower(Box<Expr>, Box<Expr>)

UnaryFunction(UnaryFunction, Box<Expr>)

BinaryFunction(BinaryFunction, Box<Expr>, Box<Expr>)

Methods

impl Expr

pub fn is_negated(&self) -> bool

pub fn neg(&self) -> Expr

pub fn is_context_independant(&self) -> bool

Check if it is necessary to read within a symbol table

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Expr

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

Formats the value using the given formatter.

impl Display for Expr

fn fmt(&self, format: &mut Formatter) -> Result<(), Error>

Formats the value using the given formatter.

impl Eq for Expr

impl ExprEvaluationExt for Expr

fn resolve(
    &self,
    sym: &SymbolsTableCaseDependent
) -> Result<i32, AssemblerError>

fn eval(&self) -> Result<i32, AssemblerError>

Simple evaluation without context => can only evaluate number based operations.

impl<'_> From<&'_ str> for Expr

fn from(src: &str) -> Expr

Performs the conversion.

impl From<Expr> for DataAccess

fn from(exp: Expr) -> DataAccess

Performs the conversion.

impl From<Expr> for FormattedExpr

fn from(e: Expr) -> FormattedExpr

Performs the conversion.

impl From<i16> for Expr

fn from(src: i16) -> Expr

Performs the conversion.

impl From<i32> for Expr

fn from(src: i32) -> Expr

Performs the conversion.

impl From<i8> for Expr

fn from(src: i8) -> Expr

Performs the conversion.

impl From<u16> for Expr

fn from(src: u16) -> Expr

Performs the conversion.

impl From<u32> for Expr

fn from(src: u32) -> Expr

Performs the conversion.

impl From<u8> for Expr

fn from(src: u8) -> Expr

Performs the conversion.

impl From<usize> for Expr

fn from(src: usize) -> Expr

Performs the conversion.

impl PartialEq<Expr> for Expr

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

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

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

This method tests for !=.

impl StructuralEq for Expr

impl StructuralPartialEq for Expr