import java.io.*;
/** The java classes typically used to represent a parsed grammar AST; each inner class is a type of AST node. */
-public class MetaGrammarBindings {
+public class MetaGrammarBindings extends AnnotationGrammarBindings {
+
+ public MetaGrammarBindings() { super(MetaGrammarBindings.class); }
// FIXME ugly ugly ugly scary dangerous
public static String prefix = "";
-
+
/** A grammar (a set of nonterminals) */
public static class GrammarNode extends HashMap<String,NonTerminalNode> implements NonTerminalSource {
public NonTerminalNode[] getNonTerminals() {
for(NonTerminalNode nt : values()) ret += nt + ", ";
return ret + " ]";
}
- public Union build(String s, GrammarBindingResolver rm) {
+ public Union build(String s, Grammar.Bindings rm) {
Context cx = new Context(this,rm);
Union u = null;
for(MetaGrammarBindings.NonTerminalNode nt : values()) {
}
}
- public static @bind.as("#import") GrammarNode poundimport(String fileName) {
- System.err.println("#import " + fileName);
+ public static @bind.as("#import") GrammarNode poundimport(String fileName, String as) {
+ if (as==null) as = "";
+ else if ("".equals(as)) { }
+ else as = as +".";
+
+ System.err.println("#import " + fileName + " as " + as);
try {
- Tree t = new CharParser(MetaGrammar.make()).parse(new FileInputStream(fileName)).expand1();
+ Tree t = new CharParser(MetaGrammar.newInstance()).parse(new FileInputStream("tests/"+fileName)).expand1();
Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
- return (MetaGrammarBindings.GrammarNode)red.invoke(t);
+ String oldprefix = prefix;
+ prefix = as;
+ GrammarNode gn = (GrammarNode)red.invoke(t);
+ prefix = oldprefix;
+ return gn;
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
}
- public static @bind.as("=") NonTerminalNode go(@bind.arg String name, @bind.arg Seq[][] sequences) { return new NonTerminalNode(name, sequences, true); }
+
+ public static @bind.as("=") NonTerminalNode go(@bind.arg String name, @bind.arg Seq[][] sequences) {
+ return new NonTerminalNode(name, sequences, true); }
public static @bind.as("=") NonTerminalNode go(@bind.arg String name, @bind.arg String sep, @bind.arg Seq[][] sequences) {
- return new NonTerminalNode(name, sequences, true, sep);
- }
+ return new NonTerminalNode(name, sequences, true, sep); }
public static class AnonUnionNode extends UnionNode {
public @bind.as("(") AnonUnionNode(Seq[][] sequences) {
public char last;
}
- public static abstract class ElementNode {
- public String getLabel() { return null; }
- public String getOwnerTag() { return null; }
- public boolean drop() { return false; }
- public abstract Element build(Context cx, NonTerminalNode cnt);
- }
-
- public static class Drop extends ElementNode {
- public ElementNode e;
- public Drop(ElementNode e) { this.e = e; }
- public String getLabel() { return null; }
- public boolean drop() { return true; }
- public String getOwnerTag() { return e.getOwnerTag(); }
- public Element build(Context cx, NonTerminalNode cnt) { return e.build(cx, cnt); }
- }
-
- public static class Label extends ElementNode {
- public String label;
- public ElementNode e;
- public Label(String label, ElementNode e) { this.e = e; this.label = label; }
- public String getLabel() { return label; }
- public String getOwnerTag() { return e.getOwnerTag(); }
- public Element build(Context cx, NonTerminalNode cnt) { return e.build(cx, cnt); }
- }
-
public static /*abstract*/ class Seq {
HashSet<Seq> and = new HashSet<Seq>();
HashSet<Seq> not = new HashSet<Seq>();
}
public Seq(ElementNode e) { this(new ElementNode[] { e }); }
public Seq(ElementNode[] elements) { this.elements = elements; }
- public Seq tag(String tag) { this.tag = tag; return this; }
+ public Seq tag(String tag) { this.tag = prefix+tag; return this; }
public Seq follow(ElementNode follow) { this.follow = follow; return this; }
public Seq dup() {
Seq ret = new Seq(elements);
ret.and.addAll(and);
ret.not.addAll(not);
ret.follow = follow;
- ret.tag = tag;
+ ret.tag = prefix+tag;
return ret;
}
public Seq and(Seq s) { and.add(s); s.lame = true; return this; }
}
public Sequence build0(Context cx, boolean lame, NonTerminalNode cnt) {
boolean dropAll = lame;
- if (tag!=null && "()".equals(tag)) dropAll = true;
+ if (tag!=null && tag.endsWith("()")) dropAll = true;
boolean[] drops = new boolean[elements.length];
Element[] els = new Element[elements.length];
for(int i=0; i<elements.length; i++) {
Sequence ret = null;
if (dropAll) ret = Sequence.drop(els, false);
else {
- ret = cx.rm.tryResolveTag(tag, cnt==null?null:cnt.name, els, drops);
+ Production prod = new Production(tag, (cnt==null?null:cnt.name), els, drops);
+ ret = cx.rm.createSequence(prod);
if (ret == null) {
int idx = -1;
for(int i=0; i<els.length; i++)
: Sequence.repeatMaximal(e.build(cx, null), zero, many, infer(sep.build(cx, null)), cx.rm.repeatTag());
}
}
- public static class Constant extends ElementNode {
- Element constant;
- public Constant(Element constant) { this.constant = constant; }
- public Element build(Context cx, NonTerminalNode cnt) { return constant; }
- }
- public abstract static class PostProcess extends ElementNode {
- ElementNode e;
- public PostProcess(ElementNode e) { this.e = e; }
- public Element build(Context cx, NonTerminalNode cnt) { return postProcess(e.build(cx, cnt)); }
- public abstract Element postProcess(Element e);
- }
// FIXME: it would be nice if we could hoist this into "Rep"
public static @bind.as("++") ElementNode plusmax(final ElementNode e)
{ return new Drop(e); }
public static @bind.as("^") ElementNode caret(final String s) {
+ final String thePrefix = prefix;
return new Drop(new Constant(CharRange.string(s)) {
- public String getOwnerTag() { return s; }
+ public String getOwnerTag() { return thePrefix+s; }
});
}
public HashMap<String,Union> map = new HashMap<String,Union>();
public GrammarNode grammar;
public String cnt = null;
- public GrammarBindingResolver rm;
- public Context(GrammarNode g, GrammarBindingResolver rm) {
+ public Grammar.Bindings rm;
+ public Context(GrammarNode g, Grammar.Bindings rm) {
this.grammar = g;
this.rm = rm;
}
}
return ret;
}
- public Context(Tree t, GrammarBindingResolver rm) {
+ public Context(Tree t, Grammar.Bindings rm) {
this.rm = rm;
Tree.TreeFunctor<Object,Object> red = (Tree.TreeFunctor<Object,Object>)t.head();
this.grammar = (GrammarNode)red.invoke(t);
}
+ public static class Constant extends ElementNode {
+ Element constant;
+ public Constant(Element constant) { this.constant = constant; }
+ public Element build(Context cx, NonTerminalNode cnt) { return constant; }
+ }
+ public abstract static class PostProcess extends ElementNode {
+ ElementNode e;
+ public PostProcess(ElementNode e) { this.e = e; }
+ public Element build(Context cx, NonTerminalNode cnt) { return postProcess(e.build(cx, cnt)); }
+ public abstract Element postProcess(Element e);
+ }
+ public static abstract class ElementNode {
+ public String getLabel() { return null; }
+ public String getOwnerTag() { return null; }
+ public boolean drop() { return false; }
+ public abstract Element build(Context cx, NonTerminalNode cnt);
+ }
+
+ public static class Drop extends ElementNode {
+ public ElementNode e;
+ public Drop(ElementNode e) { this.e = e; }
+ public String getLabel() { return null; }
+ public boolean drop() { return true; }
+ public String getOwnerTag() { return e.getOwnerTag(); }
+ public Element build(Context cx, NonTerminalNode cnt) { return e.build(cx, cnt); }
+ }
+
+ public static class Label extends ElementNode {
+ public String label;
+ public ElementNode e;
+ public Label(String label, ElementNode e) { this.e = e; this.label = label; }
+ public String getLabel() { return label; }
+ public String getOwnerTag() { return e.getOwnerTag(); }
+ public Element build(Context cx, NonTerminalNode cnt) { return e.build(cx, cnt); }
+ }
}
projects / sbp.git / blobdiff