statements add.ts

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1x import {IStatement} from "./_statement";
import {seq, altPrio, alt, opt} from "../combi";
import {Target, Source, FieldSub} from "../expressions";
import {IStatementRunnable} from "../statement_runnable";
 
export class Add implements IStatement {
 
  public getMatcher(): IStatementRunnable {
    const to = seq("TO", Target);
    const accordingTo = seq("ACCORDING TO", FieldSub);
    const giving = seq("GIVING", FieldSub, opt(accordingTo));
    const then = seq("THEN", FieldSub, "UNTIL", FieldSub, alt(giving, to));
 
    const ret = seq("ADD", Source, altPrio(to, then));
 
    return ret;
  }
 
}