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fix(compiler): make unary plus operator consistent to JavaScript (#22154) 

fixes #22089

PR Close #22154
This commit is contained in:
Trotyl 2018-02-12 00:02:24 +08:00 committed by Miško Hevery
parent 20a900b648
commit 72f8abd7b3
2 changed files with 6 additions and 2 deletions
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4
packages/compiler/src/expression_parser/parser.ts
View File

@ -477,7 +477,9 @@ export class _ParseAST {
switch (operator) { switch (operator) {
case '+': case '+':
this.advance(); this.advance();
return this.parsePrefix(); result = this.parsePrefix();
return new Binary(
this.span(start), '-', result, new LiteralPrimitive(new ParseSpan(start, start), 0));
case '-': case '-':
this.advance(); this.advance();
result = this.parsePrefix(); result = this.parsePrefix();

4
packages/compiler/test/expression_parser/parser_spec.ts
View File

@ -103,7 +103,9 @@ import {validate} from './validator';
it('should parse unary - expressions', () => { it('should parse unary - expressions', () => {
checkAction('-1', '0 - 1'); checkAction('-1', '0 - 1');
checkAction('+1', '1'); checkAction('+1', '1 - 0');
checkAction(`-'1'`, `0 - "1"`);
checkAction(`+'1'`, `"1" - 0`);
}); });
it('should parse unary ! expressions', () => { it('should parse unary ! expressions', () => {