LEVIATHAN v962456e · 962456eee1

Standard Library · expr

class Bin

A binary operation: l op r.

since 0.1.0-alpha.1linuxwindowswasm

bases
Node

Overview

op is one of ==, !=, <, <=, >, >=, &&, ||, +, -, *, / or %. The operands keep the order they were written in.

Examples

expr::Node tree = expr::Bin("&&", expr::Field(["active"]), expr::Bin(">=", expr::Field(["age"]), expr::Lit(18)));
match (tree) {
    expr::Bin => {
        expr::Bin b = tree;
        console.writeln("${b.op} of two operands");
        match (b.r) {
            expr::Bin => { expr::Bin r = b.r; console.writeln("right side: ${r.op}"); }
            else => { console.writeln("right side: other"); }
        }
    }
    else => { console.writeln("not a Bin"); }
}
Run it ▶
&& of two operands
right side: >=

Constructors

new

new(string o, Node left, Node right)

Create a binary-operation node.

Parameters

o
The operator text.
left
The left operand.
right
The right operand.

Examples

expr::Bin b = expr::Bin(">=", expr::Field(["age"]), expr::Lit(18));
console.writeln(b.op);
match (b.l) {
    expr::Field => { console.writeln("left is a field"); }
    else => { console.writeln("left is something else"); }
}
Run it ▶
>=
left is a field

Fields

l

The left operand.

op

string op

The operator text, for example ">=" or "&&".

r

The right operand.

See also

  • Un — A unary operation: !e or -e.