Enum Expr 

pub enum Expr {
    Number(f64, SourceLocation),
    String(String, SourceLocation),
    Regex(String, SourceLocation),
    Var(String, SourceLocation),
    Field(Box<Expr>, SourceLocation),
    ArrayAccess {
        array: String,
        indices: Vec<Expr>,
        location: SourceLocation,
    },
    Binary {
        left: Box<Expr>,
        op: BinaryOp,
        right: Box<Expr>,
        location: SourceLocation,
    },
    Unary {
        op: UnaryOp,
        operand: Box<Expr>,
        location: SourceLocation,
    },
    Assign {
        target: Box<Expr>,
        op: AssignOp,
        value: Box<Expr>,
        location: SourceLocation,
    },
    PreIncrement(Box<Expr>, SourceLocation),
    PreDecrement(Box<Expr>, SourceLocation),
    PostIncrement(Box<Expr>, SourceLocation),
    PostDecrement(Box<Expr>, SourceLocation),
    Ternary {
        condition: Box<Expr>,
        then_expr: Box<Expr>,
        else_expr: Box<Expr>,
        location: SourceLocation,
    },
    Call {
        name: String,
        args: Vec<Expr>,
        location: SourceLocation,
    },
    InArray {
        key: Vec<Expr>,
        array: String,
        location: SourceLocation,
    },
    Match {
        expr: Box<Expr>,
        pattern: Box<Expr>,
        negated: bool,
        location: SourceLocation,
    },
    Concat(Vec<Expr>, SourceLocation),
    Getline {
        var: Option<String>,
        input: Option<GetlineInput>,
        location: SourceLocation,
    },
    Group(Box<Expr>, SourceLocation),
}

Expression types

Variants

Number(f64, SourceLocation)

Numeric literal

String(String, SourceLocation)

String literal

Regex(String, SourceLocation)

Regex literal

Var(String, SourceLocation)

Variable reference

Field(Box<Expr>, SourceLocation)

Field access: $expr

ArrayAccess

Array access: arr[index] or arr[i,j]

Fields

array: String

indices: Vec<Expr>

location: SourceLocation

Binary

Binary operation

Fields

left: Box<Expr>

op: BinaryOp

right: Box<Expr>

location: SourceLocation

Unary

Unary operation

Fields

op: UnaryOp

operand: Box<Expr>

location: SourceLocation

Assign

Assignment

Fields

target: Box<Expr>

op: AssignOp

value: Box<Expr>

location: SourceLocation

PreIncrement(Box<Expr>, SourceLocation)

Pre-increment: ++x

PreDecrement(Box<Expr>, SourceLocation)

Pre-decrement: –x

PostIncrement(Box<Expr>, SourceLocation)

Post-increment: x++

PostDecrement(Box<Expr>, SourceLocation)

Post-decrement: x–

Ternary

Ternary: cond ? then : else

Fields

condition: Box<Expr>

then_expr: Box<Expr>

else_expr: Box<Expr>

location: SourceLocation

Call

Function call

Fields

name: String

args: Vec<Expr>

location: SourceLocation

InArray

Array membership: (key) in array

Fields

key: Vec<Expr>

array: String

location: SourceLocation

Match

Regex match: expr ~ /regex/ or expr !~ /regex/

Fields

expr: Box<Expr>

pattern: Box<Expr>

negated: bool

location: SourceLocation

Concat(Vec<Expr>, SourceLocation)

Concatenation (implicit when expressions are adjacent)

Getline

Getline as expression (returns status)

Fields

var: Option<String>

input: Option<GetlineInput>

location: SourceLocation

Group(Box<Expr>, SourceLocation)

Grouping parentheses (for precedence)

Implementations

impl Expr

pub fn location(&self) -> SourceLocation

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

Returns a duplicate 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

Formats the value using the given formatter.