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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "TypeOfExpression.h"
#include "LookupContext.h"
#include "ResolveExpression.h"
#include "pp-engine.h"
#include <cplusplus/AST.h>
#include <cplusplus/Symbol.h>
#include <cplusplus/TranslationUnit.h>
#include <utils/algorithm.h>
#include <QSet>
using namespace Utils;
namespace CPlusPlus {
TypeOfExpression::TypeOfExpression():
m_ast(nullptr),
m_scope(nullptr),
m_expandTemplates(false)
{
}
void TypeOfExpression::init(Document::Ptr thisDocument, const Snapshot &snapshot,
std::shared_ptr<CreateBindings> bindings,
const QSet<const Declaration *> &autoDeclarationsBeingResolved)
{
m_thisDocument = thisDocument;
m_snapshot = snapshot;
m_ast = nullptr;
m_scope = nullptr;
m_lookupContext = {};
Q_ASSERT(!m_bindings);
m_bindings = bindings;
if (!m_bindings)
m_bindings.reset(new CreateBindings(thisDocument, snapshot));
m_environment.reset();
m_autoDeclarationsBeingResolved = autoDeclarationsBeingResolved;
}
QList<LookupItem> TypeOfExpression::operator()(const QByteArray &utf8code,
Scope *scope,
PreprocessMode mode)
{
Document::Ptr expressionDoc;
if (mode == Preprocess)
expressionDoc = documentForExpression(preprocessedExpression(utf8code));
else
expressionDoc = documentForExpression(utf8code);
expressionDoc->check();
return this->operator ()(extractExpressionAST(expressionDoc),
expressionDoc,
scope);
}
QList<LookupItem> TypeOfExpression::reference(const QByteArray &utf8code,
Scope *scope,
PreprocessMode mode)
{
Document::Ptr expressionDoc;
if (mode == Preprocess)
expressionDoc = documentForExpression(preprocessedExpression(utf8code));
else
expressionDoc = documentForExpression(utf8code);
expressionDoc->check();
return reference(extractExpressionAST(expressionDoc), expressionDoc, scope);
}
QList<LookupItem> TypeOfExpression::operator()(ExpressionAST *expression,
Document::Ptr document,
Scope *scope)
{
m_ast = expression;
m_scope = scope;
m_documents.append(document);
m_lookupContext = LookupContext(document, m_thisDocument, m_snapshot, m_bindings);
Q_ASSERT(m_bindings);
m_lookupContext.setExpandTemplates(m_expandTemplates);
ResolveExpression resolve(m_lookupContext, m_autoDeclarationsBeingResolved);
return resolve(m_ast, scope);
}
QList<LookupItem> TypeOfExpression::reference(ExpressionAST *expression,
Document::Ptr document,
Scope *scope)
{
m_ast = expression;
m_scope = scope;
m_documents.append(document);
m_lookupContext = LookupContext(document, m_thisDocument, m_snapshot, m_bindings);
Q_ASSERT(m_bindings);
m_lookupContext.setExpandTemplates(m_expandTemplates);
ResolveExpression resolve(m_lookupContext, m_autoDeclarationsBeingResolved);
return resolve.reference(m_ast, scope);
}
QByteArray TypeOfExpression::preprocess(const QByteArray &utf8code) const
{
return preprocessedExpression(utf8code);
}
ExpressionAST *TypeOfExpression::ast() const
{
return m_ast;
}
Scope *TypeOfExpression::scope() const
{
return m_scope;
}
const LookupContext &TypeOfExpression::context() const
{
return m_lookupContext;
}
ExpressionAST *TypeOfExpression::expressionAST() const
{
return extractExpressionAST(m_lookupContext.expressionDocument());
}
void TypeOfExpression::processEnvironment(Document::Ptr doc, Environment *env,
QSet<QString> *processed) const
{
if (doc && Utils::insert(*processed, doc->filePath().path())) {
const QList<Document::Include> includes = doc->resolvedIncludes();
for (const Document::Include &incl : includes)
processEnvironment(m_snapshot.document(incl.resolvedFileName()), env, processed);
for (const Macro ¯o : doc->definedMacros())
env->bind(macro);
}
}
QByteArray TypeOfExpression::preprocessedExpression(const QByteArray &utf8code) const
{
if (utf8code.trimmed().isEmpty())
return utf8code;
if (! m_environment) {
Environment *env = new Environment(); // ### cache the environment.
QSet<QString> processed;
processEnvironment(m_thisDocument, env, &processed);
m_environment.reset(env);
}
Preprocessor preproc(nullptr, m_environment.get());
return preproc.run(Utils::FilePath::fromParts({}, {}, u"<expression>"), utf8code);
}
ExpressionAST *extractExpressionAST(Document::Ptr doc)
{
if (! doc->translationUnit()->ast())
return nullptr;
return doc->translationUnit()->ast()->asExpression();
}
Document::Ptr documentForExpression(const QByteArray &utf8code)
{
// create the expression's AST.
Document::Ptr doc = Document::create(FilePath::fromPathPart(u"<completion>"));
doc->setUtf8Source(utf8code);
doc->parse(Document::ParseExpression);
return doc;
}
} // CPlusPlus
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