@neo-one/smart-contract-compiler/dist/esm/compile/helper/statement/IfHelper.js

NEO•ONE TypeScript smart contract compiler.

import { Helper } from '../Helper';
export class IfHelper extends Helper {
    constructor({ condition, whenTrue, whenFalse }) {
        super();
        this.condition = condition;
        this.whenTrue = whenTrue;
        this.whenFalse = whenFalse;
    }
    emit(sb, node, _options) {
        this.condition();
        const { whenTrue, whenFalse } = this;
        if (whenTrue === undefined) {
            if (whenFalse === undefined) {
                throw new Error('If statement must have a true or false value');
            }
            sb.withProgramCounter((endPC) => {
                sb.emitJmp(node, 'JMPIF', endPC.getLast());
                whenFalse();
            });
        }
        else {
            sb.withProgramCounter((whenFalsePC) => {
                sb.withProgramCounter((whenTruePC) => {
                    sb.emitJmp(node, 'JMPIFNOT', whenTruePC.getLast());
                    whenTrue();
                    if (this.whenFalse !== undefined) {
                        sb.emitJmp(node, 'JMP', whenFalsePC.getLast());
                    }
                });
                if (this.whenFalse !== undefined) {
                    this.whenFalse();
                }
            });
        }
    }
}

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