Enum Expression 

pub enum Expression {
    PostIncrement(Loc, Box<Expression>),
    PostDecrement(Loc, Box<Expression>),
    New(Loc, Box<Expression>),
    ArraySubscript(Loc, Box<Expression>, Option<Box<Expression>>),
    ArraySlice(Loc, Box<Expression>, Option<Box<Expression>>, Option<Box<Expression>>),
    Parenthesis(Loc, Box<Expression>),
    MemberAccess(Loc, Box<Expression>, Identifier),
    FunctionCall(Loc, Box<Expression>, Vec<Expression>),
    FunctionCallBlock(Loc, Box<Expression>, Box<Statement>),
    NamedFunctionCall(Loc, Box<Expression>, Vec<NamedArgument>),
    Not(Loc, Box<Expression>),
    BitwiseNot(Loc, Box<Expression>),
    Delete(Loc, Box<Expression>),
    PreIncrement(Loc, Box<Expression>),
    PreDecrement(Loc, Box<Expression>),
    UnaryPlus(Loc, Box<Expression>),
    Negate(Loc, Box<Expression>),
    Power(Loc, Box<Expression>, Box<Expression>),
    Multiply(Loc, Box<Expression>, Box<Expression>),
    Divide(Loc, Box<Expression>, Box<Expression>),
    Modulo(Loc, Box<Expression>, Box<Expression>),
    Add(Loc, Box<Expression>, Box<Expression>),
    Subtract(Loc, Box<Expression>, Box<Expression>),
    ShiftLeft(Loc, Box<Expression>, Box<Expression>),
    ShiftRight(Loc, Box<Expression>, Box<Expression>),
    BitwiseAnd(Loc, Box<Expression>, Box<Expression>),
    BitwiseXor(Loc, Box<Expression>, Box<Expression>),
    BitwiseOr(Loc, Box<Expression>, Box<Expression>),
    Less(Loc, Box<Expression>, Box<Expression>),
    More(Loc, Box<Expression>, Box<Expression>),
    LessEqual(Loc, Box<Expression>, Box<Expression>),
    MoreEqual(Loc, Box<Expression>, Box<Expression>),
    Equal(Loc, Box<Expression>, Box<Expression>),
    NotEqual(Loc, Box<Expression>, Box<Expression>),
    And(Loc, Box<Expression>, Box<Expression>),
    Or(Loc, Box<Expression>, Box<Expression>),
    ConditionalOperator(Loc, Box<Expression>, Box<Expression>, Box<Expression>),
    Assign(Loc, Box<Expression>, Box<Expression>),
    AssignOr(Loc, Box<Expression>, Box<Expression>),
    AssignAnd(Loc, Box<Expression>, Box<Expression>),
    AssignXor(Loc, Box<Expression>, Box<Expression>),
    AssignShiftLeft(Loc, Box<Expression>, Box<Expression>),
    AssignShiftRight(Loc, Box<Expression>, Box<Expression>),
    AssignAdd(Loc, Box<Expression>, Box<Expression>),
    AssignSubtract(Loc, Box<Expression>, Box<Expression>),
    AssignMultiply(Loc, Box<Expression>, Box<Expression>),
    AssignDivide(Loc, Box<Expression>, Box<Expression>),
    AssignModulo(Loc, Box<Expression>, Box<Expression>),
    BoolLiteral(Loc, bool),
    NumberLiteral(Loc, String, String, Option<Identifier>),
    RationalNumberLiteral(Loc, String, String, String, Option<Identifier>),
    HexNumberLiteral(Loc, String, Option<Identifier>),
    StringLiteral(Vec<StringLiteral>),
    Type(Loc, Type),
    HexLiteral(Vec<HexLiteral>),
    AddressLiteral(Loc, String),
    Variable(Identifier),
    List(Loc, ParameterList),
    ArrayLiteral(Loc, Vec<Expression>),
}

An expression.

Variants

PostIncrement(Loc, Box<Expression>)

<1>++

PostDecrement(Loc, Box<Expression>)

<1>--

New(Loc, Box<Expression>)

new <1>

ArraySubscript(Loc, Box<Expression>, Option<Box<Expression>>)

<1>\[ [2] \]

ArraySlice(Loc, Box<Expression>, Option<Box<Expression>>, Option<Box<Expression>>)

<1>\[ [2] : [3] \]

Parenthesis(Loc, Box<Expression>)

(<1>)

MemberAccess(Loc, Box<Expression>, Identifier)

<1>.<2>

FunctionCall(Loc, Box<Expression>, Vec<Expression>)

<1>(<2>,*)

FunctionCallBlock(Loc, Box<Expression>, Box<Statement>)

<1><2> where <2> is a block.

NamedFunctionCall(Loc, Box<Expression>, Vec<NamedArgument>)

<1>({ <2>,* })

Not(Loc, Box<Expression>)

!<1>

BitwiseNot(Loc, Box<Expression>)

~<1>

Delete(Loc, Box<Expression>)

delete <1>

PreIncrement(Loc, Box<Expression>)

++<1>

PreDecrement(Loc, Box<Expression>)

--<1>

UnaryPlus(Loc, Box<Expression>)

+<1>

Note that this isn’t actually supported by Solidity.

Negate(Loc, Box<Expression>)

-<1>

Power(Loc, Box<Expression>, Box<Expression>)

<1> ** <2>

Multiply(Loc, Box<Expression>, Box<Expression>)

<1> * <2>

Divide(Loc, Box<Expression>, Box<Expression>)

<1> / <2>

Modulo(Loc, Box<Expression>, Box<Expression>)

<1> % <2>

Add(Loc, Box<Expression>, Box<Expression>)

<1> + <2>

Subtract(Loc, Box<Expression>, Box<Expression>)

<1> - <2>

ShiftLeft(Loc, Box<Expression>, Box<Expression>)

<1> << <2>

ShiftRight(Loc, Box<Expression>, Box<Expression>)

<1> >> <2>

BitwiseAnd(Loc, Box<Expression>, Box<Expression>)

<1> & <2>

BitwiseXor(Loc, Box<Expression>, Box<Expression>)

<1> ^ <2>

BitwiseOr(Loc, Box<Expression>, Box<Expression>)

<1> | <2>

Less(Loc, Box<Expression>, Box<Expression>)

<1> < <2>

More(Loc, Box<Expression>, Box<Expression>)

<1> > <2>

LessEqual(Loc, Box<Expression>, Box<Expression>)

<1> <= <2>

MoreEqual(Loc, Box<Expression>, Box<Expression>)

<1> >= <2>

Equal(Loc, Box<Expression>, Box<Expression>)

<1> == <2>

NotEqual(Loc, Box<Expression>, Box<Expression>)

<1> != <2>

And(Loc, Box<Expression>, Box<Expression>)

<1> && <2>

Or(Loc, Box<Expression>, Box<Expression>)

<1> || <2>

ConditionalOperator(Loc, Box<Expression>, Box<Expression>, Box<Expression>)

<1> ? <2> : <3>

AKA ternary operator.

Assign(Loc, Box<Expression>, Box<Expression>)

<1> = <2>

AssignOr(Loc, Box<Expression>, Box<Expression>)

<1> |= <2>

AssignAnd(Loc, Box<Expression>, Box<Expression>)

<1> &= <2>

AssignXor(Loc, Box<Expression>, Box<Expression>)

<1> ^= <2>

AssignShiftLeft(Loc, Box<Expression>, Box<Expression>)

<1> <<= <2>

AssignShiftRight(Loc, Box<Expression>, Box<Expression>)

<1> >>= <2>

AssignAdd(Loc, Box<Expression>, Box<Expression>)

<1> += <2>

AssignSubtract(Loc, Box<Expression>, Box<Expression>)

<1> -= <2>

AssignMultiply(Loc, Box<Expression>, Box<Expression>)

<1> *= <2>

AssignDivide(Loc, Box<Expression>, Box<Expression>)

<1> /= <2>

AssignModulo(Loc, Box<Expression>, Box<Expression>)

<1> %= <2>

BoolLiteral(Loc, bool)

true or false

NumberLiteral(Loc, String, String, Option<Identifier>)

``

RationalNumberLiteral(Loc, String, String, String, Option<Identifier>)

``

HexNumberLiteral(Loc, String, Option<Identifier>)

``

StringLiteral(Vec<StringLiteral>)

<1>+. See StringLiteral.

Type(Loc, Type)

See Type.

HexLiteral(Vec<HexLiteral>)

<1>+. See HexLiteral.

AddressLiteral(Loc, String)

0x[a-fA-F0-9]{40}

This should be correctly checksummed, but it currently isn’t being enforced in the parser.

Variable(Identifier)

Any valid Identifier.

List(Loc, ParameterList)

(<1>,*)

ArrayLiteral(Loc, Vec<Expression>)

\[ <1>.* \]

Implementations

impl Expression

pub const fn operator(&self) -> Option<&'static str>

Returns the operator string of this expression, if any.

impl Expression

pub fn remove_parenthesis(&self) -> &Expression

Removes one layer of parentheses.

pub fn strip_parentheses(&self) -> &Expression

Strips all parentheses recursively.

pub fn components(&self) -> (Option<&Self>, Option<&Self>)

Returns shared references to the components of this expression.

(left_component, right_component)

Examples

use solang_parser::pt::{Expression, Identifier, Loc};

// `a++`
let var = Expression::Variable(Identifier::new("a"));
let post_increment = Expression::PostIncrement(Loc::default(), Box::new(var.clone()));
assert_eq!(post_increment.components(), (Some(&var), None));

// `++a`
let var = Expression::Variable(Identifier::new("a"));
let pre_increment = Expression::PreIncrement(Loc::default(), Box::new(var.clone()));
assert_eq!(pre_increment.components(), (None, Some(&var)));

// `a + b`
let var_a = Expression::Variable(Identifier::new("a"));
let var_b = Expression::Variable(Identifier::new("b"));
let pre_increment = Expression::Add(Loc::default(), Box::new(var_a.clone()), Box::new(var_b.clone()));
assert_eq!(pre_increment.components(), (Some(&var_a), Some(&var_b)));

pub fn components_mut(&mut self) -> (Option<&mut Self>, Option<&mut Self>)

Returns mutable references to the components of this expression.

See also Expression::components.

pub const fn is_unsplittable(&self) -> bool

Returns whether this expression can be split across multiple lines.

pub const fn has_space_around(&self) -> bool

Returns whether this expression has spaces around it.

pub fn is_literal(&self) -> bool

Returns if the expression is a literal

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl CodeLocation for Expression

fn loc(&self) -> Loc

Returns the code location of self.

impl Debug for Expression

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

Formats the value using the given formatter.

impl Display for Expression

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

Formats the value using the given formatter.

impl Eq for Expression

impl OptionalCodeLocation for Expression

fn loc_opt(&self) -> Option<Loc>

Returns the optional code location of self.

impl PartialEq for Expression

fn eq(&self, other: &Expression) -> 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 StructuralPartialEq for Expression