@neo-one/smart-contract-compiler
Version:
NEO•ONE TypeScript smart contract compiler.
73 lines (71 loc) • 2.93 kB
JavaScript
import { tsUtils } from '@neo-one/ts-utils';
import { Types } from '../../../constants';
import { BuiltinInstanceMemberCall } from '../../BuiltinInstanceMemberCall';
export class ArrayStoragePop extends BuiltinInstanceMemberCall {
canCall() {
return true;
}
emitCall(sb, func, node, optionsIn, visited) {
const options = sb.pushValueOptions(optionsIn);
if (!visited) {
sb.visit(tsUtils.expression.getExpression(func), options);
}
sb.emitOp(node, 'DUP');
sb.emitHelper(node, options, sb.helpers.getArrayStorageLength);
sb.emitHelper(node, options, sb.helpers.if({
condition: () => {
sb.emitOp(node, 'DUP');
sb.emitPushInt(node, 0);
sb.emitOp(node, 'NUMEQUAL');
},
whenTrue: () => {
sb.emitOp(node, 'DROP');
sb.emitOp(node, 'DROP');
if (optionsIn.pushValue) {
sb.emitHelper(node, options, sb.helpers.wrapUndefined);
}
},
whenFalse: () => {
sb.emitHelper(node, options, sb.helpers.if({
condition: () => {
sb.emitOp(node, 'DUP');
sb.emitPushInt(node, 1);
sb.emitOp(node, 'NUMEQUAL');
},
whenTrue: () => {
sb.emitOp(node, 'DROP');
sb.emitPushInt(node, 0);
},
whenFalse: () => {
sb.emitOp(node, 'DEC');
},
}));
sb.emitOp(node, 'SWAP');
sb.emitOp(node, 'TUCK');
sb.emitOp(node, 'OVER');
sb.emitHelper(node, options, sb.helpers.coerceToInt);
sb.emitHelper(node, options, sb.helpers.wrapNumber);
if (optionsIn.pushValue) {
sb.emitOp(node, 'SWAP');
sb.emitOp(node, 'TUCK');
sb.emitOp(node, 'OVER');
sb.emitHelper(node, options, sb.helpers.getStructuredStorage({
type: Types.ArrayStorage,
keyType: undefined,
knownKeyType: Types.Number,
}));
sb.emitPushInt(node, 5);
sb.emitOp(node, 'XTUCK');
sb.emitOp(node, 'DROP');
}
sb.emitHelper(node, sb.noPushValueOptions(options), sb.helpers.deleteStructuredStorage({
type: Types.ArrayStorage,
keyType: undefined,
knownKeyType: Types.Number,
}));
sb.emitHelper(node, options, sb.helpers.putArrayStorageLength);
},
}));
}
}
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