Files
ms/packages/molang/src/parser/parselets/loop.ts
MiaoWoo 6816e51239 feat: add molang package
1. upgrade bukkit chat
2. fix config update error

Signed-off-by: MiaoWoo <admin@yumc.pw>
2022-02-12 16:29:40 +08:00

30 lines
799 B
TypeScript

import { Parser } from '../parse'
import { Token } from '../../tokenizer/token'
import { IPrefixParselet } from './prefix'
import { IExpression } from '../expression'
import { LoopExpression } from '../expressions/loop'
export class LoopParselet implements IPrefixParselet {
constructor(public precedence = 0) {}
parse(parser: Parser, token: Token) {
parser.consume('LEFT_PARENT')
const args: IExpression[] = []
if (parser.match('RIGHT_PARENT'))
throw new Error(`loop() called without arguments`)
do {
args.push(parser.parseExpression())
} while (parser.match('COMMA'))
parser.consume('RIGHT_PARENT')
if (args.length !== 2)
throw new Error(
`There must be exactly two loop() arguments; found ${args.length}`
)
return new LoopExpression(args[0], args[1])
}
}