parse.java

来自「本设计Tiger语言为源语言」· Java 代码 · 共 42 行

package Parse;

import Absyn.Print;

public class Parse {

	public ErrorMsg.ErrorMsg errorMsg;
	public Absyn.Exp absyn;
	public Semant.Semant semant;

	public Parse(String filename) {
		errorMsg = new ErrorMsg.ErrorMsg(filename);
		{
    		java.io.InputStream inp;
    		try {
    			inp=new java.io.FileInputStream(filename);
	    	  }catch (java.io.FileNotFoundException e) {
	    		  throw new Error("File not found: " + filename);
	    	  }
	    	  Grm parser = new Grm(new Yylex(inp,errorMsg), errorMsg);
	    	  semant=new Semant.Semant(errorMsg);
	    	  /* open input files, etc. here */
	
	    	  try {
	    		  absyn=(Absyn.Exp)parser./*debug_*/parse().value;
	    		  Print ap = new Print(System.out);
	    		  ap.prExp(absyn, 1);
	    		  System.out.println();
	    		  semant.transExp(absyn);
	    	  } catch (Throwable e) {
	    		  e.printStackTrace();
	    		  throw new Error(e.toString());
	    	  } 
	    	  finally {
	    		  try {inp.close();} catch (java.io.IOException e) {}
	    	  }
	    	absyn=parser.parseResult;
     	}
	}
}