statements constant.ts

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1x import {IStatement} from "./_statement";
import {seq, alt, opt, per, optPrio} from "../combi";
import {Type, Value, Length, Decimals, ConstantFieldLength, DefinitionName} from "../expressions";
import {IStatementRunnable} from "../statement_runnable";
 
export class Constant implements IStatement {
 
  public getMatcher(): IStatementRunnable {
    const def = seq(DefinitionName,
                    opt(ConstantFieldLength),
                    per(Type, Value, Decimals, Length));
 
    const ret = seq(alt("CONSTANT", "CONSTANTS"), def, optPrio("%_PREDEFINED"));
 
    return ret;
  }
 
}