Comments (7)
All JavaScript is also valid TypeScript, so you can start by just renaming the file from .js to .ts. For more information perhaps see: https://www.typescriptlang.org/docs/handbook/migrating-from-javascript.html. It depends on how strict your TypeScript is, I suppose. I've never really tried. If you give it a shot, let me know how it works, and I can help you out with specific issues along the way.
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Tried to setup a TypeScript class for my grammar, but property chaining doesn't work:
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Not sure that property chaining is the problem there, you are missing a closing parentheses. If you fix that, what happens next?
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error TS2339: Property 'opt' does not exist on type 'Rule'.
public number: Rule = Myna.seq(Myna.integer, this.fraction.opt.ast);
from myna-parser.
This seems like a configuration problem: the opt property does exists on Rule: https://github.com/cdiggins/myna-parser/blob/master/myna.ts#L343. I'll be honest, this kind of silliness, is why I stopped coding in TypeScript, and went back to C#.
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I think the language and tooling for TypeScript is mediocre.
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Following code works without error in my env. (myna-parser
: 2.5.1 & typescript
: 3.5.1)
import { Myna } from "myna-parser";
export class MyGrammar {
public fraction: Myna.Rule = Myna.seq(".", Myna.digit.zeroOrMore).ast;
public number: Myna.Rule = Myna.seq(Myna.integer, this.fraction.opt).ast;
public plainText: Myna.Rule = Myna.notChar("\n\r").oneOrMore;
public document: Myna.Rule = Myna.choice(this.plainText, this.number)
.zeroOrMore;
}
const myGrammar = new MyGrammar();
const input = "11111";
const ast = Myna.parse(myGrammar.document, input);
console.log(ast);
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Related Issues (20)
- explainjs listed as dependency
- Possible performance degradation under Chrome Canary 61 HOT 2
- Feature request: Karma and QUnit HOT 7
- Possible performance improvements HOT 2
- Add return types to standalone functions
- 2.4.0 no longer works in the browser. HOT 8
- Case insensitive keywords? HOT 5
- Myna module improperly exported
- Error recovery and continuation
- 2 small mistakes in the sample code in readme.md
- typescript declaration file absent
- ParserError messages don't seem to be propogated HOT 3
- Question: how to check in sequence if there is a whitespace + symbol
- Example in the README file does not work out of the box.
- Question on requirements for the programing language you are working on. HOT 5
- How to *use* ? HOT 7
- delay() rule ID number changes each time HOT 4
- Create railroad diagrams HOT 4
- Add Myna to JavaScript performance benchmarks HOT 2
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