1 files changed, 30 insertions, 0 deletions
diff --git a/src/piraha/Lookup.cc b/src/piraha/Lookup.cc
new file mode 100644
index 00000000..ed42e1d1
--- /dev/null
+++ b/src/piraha/Lookup.cc
@@ -0,0 +1,30 @@
+#include "Piraha.hpp"
+
+Lookup::Lookup(std::string name_,smart_ptr<Grammar> g) : gram(g), name(name_), capture(true) {
+    if(name[0] == '-') {
+        capture = false;
+        name = name.substr(1);
+    }
+}
+
+bool Lookup::match(Matcher *m) {
+    smart_ptr<Pattern> p = gram->patterns.get(name);
+    if(!p.valid()) std::cout << "Lookup of pattern [" << name << "] failed. Jmap = " << gram->patterns << std::endl;
+    assert(p.valid());
+    vector<smart_ptr<Group> > chSave = m->children;
+    m->children.clear();
+    int s = m->pos;
+    std::string save_name = m->inrule;
+    m->inrule += "::";
+    m->inrule += name;
+    bool b = p->match(m);
+    m->inrule = save_name;
+    int e = m->pos;
+    if(b) {
+        smart_ptr<Group> g = new Group(name,m->input,s,e,m->children);
+        if(capture)
+            chSave.push_back(g);
+    }
+    m->children = chSave;
+    return b;
+}