add antlr source code and ReadMe

[toc] / antlr4-cpp-runtime-4.9.2-source / runtime / src / ParserRuleContext.cpp

diff --git a/antlr4-cpp-runtime-4.9.2-source/runtime/src/ParserRuleContext.cpp b/antlr4-cpp-runtime-4.9.2-source/runtime/src/ParserRuleContext.cpp
new file mode 100644 (file)
index 0000000..b67b9a9
--- /dev/null
+++ b/antlr4-cpp-runtime-4.9.2-source/runtime/src/ParserRuleContext.cpp
@@ -0,0 +1,141 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#include "tree/TerminalNode.h"
+#include "tree/ErrorNode.h"
+#include "misc/Interval.h"
+#include "Parser.h"
+#include "Token.h"
+
+#include "support/CPPUtils.h"
+
+#include "ParserRuleContext.h"
+
+using namespace antlr4;
+using namespace antlr4::tree;
+
+using namespace antlrcpp;
+
+ParserRuleContext ParserRuleContext::EMPTY;
+
+ParserRuleContext::ParserRuleContext()
+  : start(nullptr), stop(nullptr) {
+}
+
+ParserRuleContext::ParserRuleContext(ParserRuleContext *parent, size_t invokingStateNumber)
+: RuleContext(parent, invokingStateNumber), start(nullptr), stop(nullptr) {
+}
+
+void ParserRuleContext::copyFrom(ParserRuleContext *ctx) {
+  // from RuleContext
+  this->parent = ctx->parent;
+  this->invokingState = ctx->invokingState;
+
+  this->start = ctx->start;
+  this->stop = ctx->stop;
+
+  // copy any error nodes to alt label node
+  if (!ctx->children.empty()) {
+    for (auto *child : ctx->children) {
+      auto *errorNode = dynamic_cast<ErrorNode *>(child);
+      if (errorNode != nullptr) {
+        errorNode->setParent(this);
+        children.push_back(errorNode);
+      }
+    }
+
+    // Remove the just reparented error nodes from the source context.
+    ctx->children.erase(std::remove_if(ctx->children.begin(), ctx->children.end(), [this](tree::ParseTree *e) -> bool {
+      return std::find(children.begin(), children.end(), e) != children.end();
+    }), ctx->children.end());
+  }
+}
+
+void ParserRuleContext::enterRule(tree::ParseTreeListener * /*listener*/) {
+}
+
+void ParserRuleContext::exitRule(tree::ParseTreeListener * /*listener*/) {
+}
+
+tree::TerminalNode* ParserRuleContext::addChild(tree::TerminalNode *t) {
+  t->setParent(this);
+  children.push_back(t);
+  return t;
+}
+
+RuleContext* ParserRuleContext::addChild(RuleContext *ruleInvocation) {
+  children.push_back(ruleInvocation);
+  return ruleInvocation;
+}
+
+void ParserRuleContext::removeLastChild() {
+  if (!children.empty()) {
+    children.pop_back();
+  }
+}
+
+tree::TerminalNode* ParserRuleContext::getToken(size_t ttype, size_t i) {
+  if (i >= children.size()) {
+    return nullptr;
+  }
+
+  size_t j = 0; // what token with ttype have we found?
+  for (auto *o : children) {
+    if (is<tree::TerminalNode *>(o)) {
+      tree::TerminalNode *tnode = dynamic_cast<tree::TerminalNode *>(o);
+      Token *symbol = tnode->getSymbol();
+      if (symbol->getType() == ttype) {
+        if (j++ == i) {
+          return tnode;
+        }
+      }
+    }
+  }
+
+  return nullptr;
+}
+
+std::vector<tree::TerminalNode *> ParserRuleContext::getTokens(size_t ttype) {
+  std::vector<tree::TerminalNode *> tokens;
+  for (auto &o : children) {
+    if (is<tree::TerminalNode *>(o)) {
+      tree::TerminalNode *tnode = dynamic_cast<tree::TerminalNode *>(o);
+      Token *symbol = tnode->getSymbol();
+      if (symbol->getType() == ttype) {
+        tokens.push_back(tnode);
+      }
+    }
+  }
+
+  return tokens;
+}
+
+misc::Interval ParserRuleContext::getSourceInterval() {
+  if (start == nullptr) {
+    return misc::Interval::INVALID;
+  }
+
+  if (stop == nullptr || stop->getTokenIndex() < start->getTokenIndex()) {
+    return misc::Interval(start->getTokenIndex(), start->getTokenIndex() - 1); // empty
+  }
+  return misc::Interval(start->getTokenIndex(), stop->getTokenIndex());
+}
+
+Token* ParserRuleContext::getStart() {
+  return start;
+}
+
+Token* ParserRuleContext::getStop() {
+  return stop;
+}
+
+std::string ParserRuleContext::toInfoString(Parser *recognizer) {
+  std::vector<std::string> rules = recognizer->getRuleInvocationStack(this);
+  std::reverse(rules.begin(), rules.end());
+  std::string rulesStr = antlrcpp::arrayToString(rules);
+  return "ParserRuleContext" + rulesStr + "{start=" + std::to_string(start->getTokenIndex()) + ", stop=" +
+    std::to_string(stop->getTokenIndex()) + '}';
+}
+