parse.java

来自「Tiger语言编译器」· Java 代码 · 共 40 行

package Parse;


import Absyn.Exp;

public class Parse {

	public ErrorMsg.ErrorMsg errorMsg;

	public Absyn.Exp absyn;

	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);
			}
			parser par = new parser(new Yylex(inp, errorMsg), errorMsg);
			/* open input files, etc. here */
			
			try {
				absyn = (Exp) par./* debug_ */parse().value;
				Absyn.Print p=new Absyn.Print(System.out);
				p.prExp(absyn, absyn.pos);
				} catch (Throwable e) {
				e.printStackTrace();
				throw new Error(e.toString());
			} finally {
				try {
					inp.close();
				} catch (java.io.IOException e) {
				}
			}
		}
	}
}