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/* 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/Casts.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) {
if (ErrorNode::is(child)) {
downCast<ErrorNode*>(child)->setParent(this);
children.push_back(child);
}
}
// 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) const {
if (i >= children.size()) {
return nullptr;
}
size_t j = 0; // what token with ttype have we found?
for (auto *child : children) {
if (TerminalNode::is(child)) {
tree::TerminalNode *typedChild = downCast<tree::TerminalNode*>(child);
Token *symbol = typedChild->getSymbol();
if (symbol->getType() == ttype) {
if (j++ == i) {
return typedChild;
}
}
}
}
return nullptr;
}
std::vector<tree::TerminalNode *> ParserRuleContext::getTokens(size_t ttype) const {
std::vector<tree::TerminalNode*> tokens;
for (auto *child : children) {
if (TerminalNode::is(child)) {
tree::TerminalNode *typedChild = downCast<tree::TerminalNode*>(child);
Token *symbol = typedChild->getSymbol();
if (symbol->getType() == ttype) {
tokens.push_back(typedChild);
}
}
}
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() const {
return start;
}
Token* ParserRuleContext::getStop() const {
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()) + '}';
}
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