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feat: add support for the safe navigation (aka Elvis) operator

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fixes #791
This commit is contained in:
Victor Berchet
2015-05-26 10:19:47 +02:00
parent ec2d8cc2c8
commit a9be2ebf1b
11 changed files with 153 additions and 18 deletions
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16
modules/angular2/src/change_detection/dynamic_change_detector.ts
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@ -19,7 +19,9 @@ import {
RECORD_TYPE_KEYED_ACCESS,
RECORD_TYPE_PIPE,
RECORD_TYPE_BINDING_PIPE,
RECORD_TYPE_INTERPOLATE
RECORD_TYPE_INTERPOLATE,
RECORD_TYPE_SAFE_PROPERTY,
RECORD_TYPE_SAFE_INVOKE_METHOD
} from './proto_record';
import {ExpressionChangedAfterItHasBeenChecked, ChangeDetectionError} from './exceptions';
@ -192,6 +194,10 @@ export class DynamicChangeDetector extends AbstractChangeDetector {
var context = this._readContext(proto);
return proto.funcOrValue(context);
case RECORD_TYPE_SAFE_PROPERTY:
var context = this._readContext(proto);
return isBlank(context) ? null : proto.funcOrValue(context);
case RECORD_TYPE_LOCAL:
return this.locals.get(proto.name);
@ -200,6 +206,14 @@ export class DynamicChangeDetector extends AbstractChangeDetector {
var args = this._readArgs(proto);
return proto.funcOrValue(context, args);
case RECORD_TYPE_SAFE_INVOKE_METHOD:
var context = this._readContext(proto);
if (isBlank(context)) {
return null;
}
var args = this._readArgs(proto);
return proto.funcOrValue(context, args);
case RECORD_TYPE_KEYED_ACCESS:
var arg = this._readArgs(proto)[0];
return this._readContext(proto)[arg];