statements while.ts

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1x import {IStatement} from "./_statement";
import {seq, opt} from "../combi";
import {Cond, Source, Target} from "../expressions";
import {IStatementRunnable} from "../statement_runnable";
 
export class While implements IStatement {
 
  public getMatcher(): IStatementRunnable {
    const vary = seq("VARY", Target, "FROM", Source, "NEXT", Source);
 
    return seq("WHILE", Cond, opt(vary));
  }
 
}