From 5aed7c46cff192311a208dc5e9cf7f81a40771a8 Mon Sep 17 00:00:00 2001
From: Andreas Stöckel <astoecke@techfak.uni-bielefeld.de>
Date: Tue, 31 Mar 2015 23:49:44 +0200
Subject: Implement TokenStack::lookup method used to lookup the
 SyntaxDescriptors associated with a certain token.

---
 src/core/parser/stack/TokenStack.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'src/core/parser/stack/TokenStack.cpp')

diff --git a/src/core/parser/stack/TokenStack.cpp b/src/core/parser/stack/TokenStack.cpp
index c20c764..1c26a7c 100644
--- a/src/core/parser/stack/TokenStack.cpp
+++ b/src/core/parser/stack/TokenStack.cpp
@@ -30,6 +30,24 @@ void TokenStack::pushTokens(const std::vector<SyntaxDescriptor> &tokens,
 	stack.push_back(tokens);
 }
 
+TokenDescriptor TokenStack::lookup(TokenId token) const
+{
+	TokenDescriptor res;
+	if (!stack.empty()) {
+		for (const SyntaxDescriptor &descr : stack.back()) {
+			if (descr.close == token) {
+				res.close.emplace_back(descr);
+			}
+			if (descr.shortForm == token) {
+				res.shortForm.emplace_back(descr);
+			}
+			if (descr.open == token) {
+				res.open.emplace_back(descr);
+			}
+		}
+	}
+	return res;
+}
 void TokenStack::popTokens() { stack.pop_back(); }
 
 TokenSet TokenStack::tokens() const
-- 
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