import java.lang.reflect.*;
import java.lang.ref.*;
import edu.berkeley.sbp.*;
-import edu.berkeley.sbp.*;
+import edu.berkeley.sbp.Token.Location;
import edu.berkeley.sbp.util.*;
-import edu.berkeley.sbp.*;
/** an implementation of Token for streams of Java <tt>char</tt> values */
-public class CharToken implements Token, IntegerTopology.IntegerMappable {
+public class CharToken implements IntegerMappable {
- // Public //////////////////////////////////////////////////////////////////////////////
+ public static class CharToStringParser extends Parser<CharToken,String> {
+ public CharToStringParser(Union u) { super(u, new IntegerTopology<CharToken>()); }
+ public Forest<String> shiftToken(CharToken ct, Location loc) {
+ return Forest.create(loc, ct.result(), null, false, false);
+ }
+ }
public static class CharRange extends Atom<CharToken> {
private String esc(char c) { return StringUtil.escapify(c+"", "[]-~\\\"\'"); }
- public CharRange(Topology<CharToken> t) { super(t); }
+ private Topology<CharToken> t;
+ public CharRange(Topology<CharToken> t) { this.t = t; }
+ public Topology<CharToken> top() { return t; }
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append('[');
return new CharRange(new IntegerTopology<CharToken>(new Range.Set(new Range((int)start, (int)end)).complement().intersect(all)));
}
- public static final Atom leftBrace = new Atom(new IntegerTopology<CharToken>(-3)) { public String toString() { return "{"; } };
- public static final Atom rightBrace = new Atom(new IntegerTopology<CharToken>(-4)) { public String toString() { return "}"; } };
+ public static final Atom leftBrace = new CharRange(new IntegerTopology<CharToken>(9998)) { public String toString() { return "{"; } };
+ public static final Atom rightBrace = new CharRange(new IntegerTopology<CharToken>(9999)) { public String toString() { return "}"; } };
+ public static final CharToken left = new CharToken((char)9998);
+ public static final CharToken right = new CharToken((char)9999);
private static final Range.Set all = new Range.Set(new Range(0, Character.MAX_VALUE));
public static final Atom any = new CharRange(new IntegerTopology<CharToken>(all));
/** returns an element which exactly matches the string given */
public static Element string(String s) {
- if (s.length() == 0) return MetaGrammar.epsilon;
+ if (s.length() == 0) return Union.epsilon;
final String escapified = "\""+StringUtil.escapify(s, "\"\r\n\\")+"\"";
Element ret;
if (s.length() == 1) {
// Private //////////////////////////////////////////////////////////////////////////////
public final char c;
- public final Location location;
- private CharToken(char c, int line, int col) { this(c, new CartesianLocation(line, col)); }
- private CharToken(char c, Location loc) { this.c = c; this.location = loc; }
- public String result() { return c+""; }
- public Location getLocation() { return location; }
- public String toString() { return "\'"+StringUtil.escapify(c+"")+"\'"; }
+ public CharToken(char c) { this.c = c; }
+ public String result() { return c+""; }
+ public String toString() { return "\'"+StringUtil.escapify(c+"")+"\'"; }
//////////////////////////////////////////////////////////////////////////////////////////
public int toInt() { return (int)c; }
- // Statics //////////////////////////////////////////////////////////////////////////////
-
- static class CartesianLocation implements Location {
- public final int line;
- public final int col;
- public String toString() { return line + ":" + col; }
- public CartesianLocation(int line, int col) { this.line = line; this.col = col; }
- public String getContext() { return ""; }
- }
-
- /** an implementation of Token.Stream for sequences of characters */
- public static class Stream implements Token.Stream {
- private final String message;
+ public static class Stream extends CartesianInput<CharToken> {
private final Reader r;
- private int line = 1;
- private int col = 1;
-
+
public Stream(String s) { this(new StringReader(s)); }
-
public Stream(Reader r) { this(r, null); }
- public Stream(Reader r, String s) { this.r = r; this.message = s; }
-
+ public Stream(Reader r, String s) { this.r = r; }
public Stream(InputStream i) { this(i, null); }
public Stream(InputStream i, String s) { this(new InputStreamReader(i), s); }
- private Line currentLine = new Line();
- private class Line {
- public StringBuffer line = new StringBuffer();
- }
-
- private class LocWrap implements Location {
- Line myline = Stream.this.currentLine;
- public final int line;
- public final int col;
- public String toString() { return line + ":" + col; }
- public LocWrap(int line, int col) { this.line = line; this.col = col; }
- public String getContext() {
- StringBuffer spaces = new StringBuffer();
- for(int i=0; i<col-1; i++) spaces.append(' ');
- spaces.append('^');
- return " " + myline.line.toString() + "\n " + spaces.toString();
- }
- }
-
- long then = 0;
- public Token next() throws IOException {
+ boolean cr = false;
+ public boolean isCR() { return cr; }
+ public CharToken next() throws IOException {
+ cr = false;
int i = r.read();
if (i==-1) return null;
char c = (char)i;
- Token ret = new CharToken(c, new LocWrap(line, col));
- String s = line + "";
- while(s.length() < 4) s = " " + s;
- s = "line "+s+", col " + col;
- long now = System.currentTimeMillis();
- if (now-then > 10) {
- then = now;
- System.out.print(" "+(message==null?"":message)+" " + s + " \r");
- }
- if (c=='\n') {
- currentLine = new Line();
- line++;
- col = 1;
- } else {
- currentLine.line.append(c);
- col++;
- }
- return ret;
+ cr = c=='\n';
+ return new CharToken(c);
}
}
-
}
projects / sbp.git / blobdiff