@neo-one/smart-contract-compiler/dist/esm/compile/expression/PostfixUnaryExpressionCompiler.js

NEO•ONE TypeScript smart contract compiler.

import { tsUtils } from '@neo-one/ts-utils';
import { utils } from '@neo-one/utils';
import ts from 'typescript';
import { NodeCompiler } from '../NodeCompiler';
export class PostfixUnaryExpressionCompiler extends NodeCompiler {
    constructor() {
        super(...arguments);
        this.kind = ts.SyntaxKind.PostfixUnaryExpression;
    }
    visitNode(sb, expr, options) {
        sb.visit(tsUtils.expression.getOperand(expr), sb.noSetValueOptions(sb.pushValueOptions(options)));
        const token = tsUtils.expression.getOperator(expr);
        switch (token) {
            case ts.SyntaxKind.PlusPlusToken:
            case ts.SyntaxKind.MinusMinusToken:
                this.visitAssignment(sb, token, expr, options);
                break;
            default:
                utils.assertNever(token);
        }
    }
    visitAssignment(sb, token, expr, options) {
        if (options.pushValue) {
            sb.emitOp(expr, 'DUP');
        }
        switch (token) {
            case ts.SyntaxKind.PlusPlusToken:
                sb.emitHelper(expr, sb.pushValueOptions(options), sb.helpers.toNumber({
                    type: sb.context.analysis.getType(expr),
                }));
                sb.emitOp(expr, 'INC');
                sb.emitHelper(expr, sb.pushValueOptions(options), sb.helpers.wrapNumber);
                break;
            case ts.SyntaxKind.MinusMinusToken:
                sb.emitHelper(expr, sb.pushValueOptions(options), sb.helpers.toNumber({
                    type: sb.context.analysis.getType(expr),
                }));
                sb.emitOp(expr, 'DEC');
                sb.emitHelper(expr, sb.pushValueOptions(options), sb.helpers.wrapNumber);
                break;
            default:
                utils.assertNever(token);
        }
        sb.visit(tsUtils.expression.getOperand(expr), sb.noPushValueOptions(sb.setValueOptions(options)));
    }
}

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