C++ MMap::begin方法代码示例

void Print(std::wostream& os, MMap& map, Grammar& g)
{
    for (auto it = map.begin(); it != map.end(); it++)
    {
       os << L"[" << it->m_pNotTerminal->GetName() << L", "
       << it->m_pTerminal->GetName()
       << L"]";

        //Print(os, it->m_pTerminal);
        os << L" : " ;
        const Production& production = g.GetProduction(it->m_RuleIndex);
        Print(os , production);
        os << std::endl;
    }
}

static void GenerateDescRec3(std::wostream& os,
    Grammar& g,
    MMap& map,
    const std::wstring& tokenPrefix)
{
    if (map.empty())
    {
        return;
    }

    PrintGeneratedFileHeader(os);
    PrintGeneratedFileLicense(os);

    os << L"#pragma once\n";
    os << L"\n";
    os << L"#include <string.h>\n";

    os << L"#include \"" << g.GetModuleName() << L"Lex.h\"\n";
    os << L"\n";
    os << L"\n";

    //PrintOutputClass(os, g);
    PrintFowardDeclarations(os, g, map);
    int i = 0;
    int sub = 0;
    int currentRuleIndex = -1;
    auto it = map.begin();

    for (; it != map.end();)
    {
        int currentRuleIndex = it->m_pNotTerminal->GetIndex();
        //Faz todos desta regra (até ela mudar)
        os << TAB_1 << L"int " << GetFunctionName(g, it->m_pNotTerminal->GetName()) << L"( " << g.GetLanguageName() << L"_Context* ctx)\n";
        os << TAB_1 << L"{\n";
        int sub = 0;
        bool allsame = false;
        bool firstPrinted = false;

        if (PreAnalise(map, it, allsame) == 1)
        {
            //se so tem um nao precisa testar pelo token pois sempre haver um teste
            //a seguir de qualquer forma
            const Production& production = g.GetProduction(it->m_RuleIndex);
            os << TAB__2 << L"//";
            Print(os, production);
            os << L"\n";
            PrintProduction(os, production, g, tokenPrefix, TAB__2);
            it++;
        }
        else
        {
            while (it->m_pNotTerminal->GetIndex() == currentRuleIndex)
            {
                //se todos forem iguais nao testa pelo token
                //e so imprimi o primeiro que eh igual aos outros
                if (!allsame)
                {
                    if (sub == 0)
                    {
                        os << TAB__2 << L"if (IsToken(ctx, " << tokenPrefix << it->m_pTerminal->GetName() << L"))\n";
                    }
                    else
                    {
                        os << TAB__2 << L"else if (IsToken(ctx, " << tokenPrefix << it->m_pTerminal->GetName() << L"))\n";
                    }
                }

                const Production& production = g.GetProduction(it->m_RuleIndex);

                if (!allsame)
                {
                    os << TAB__2 << L"{\n";
                }

                if (!allsame || (allsame && !firstPrinted))
                {
                    os << (!allsame ? TAB___3 : TAB__2);
                    os << L"/*";
                    Print(os, production);
                    os << L"*/\n";
                    PrintProduction(os, production, g, tokenPrefix, !allsame ? TAB___3 : TAB__2);

                    if (!allsame)
                    {
                        os << TAB__2 << L"}\n";
                    }
                }

                sub++;
                it++;

                if (it == map.end())
                {
                    break;
                }

                firstPrinted = true;
            }
        }

//.........这里部分代码省略.........

void TriMesh::rebuildTopology(Float maxAngle) {
	typedef std::multimap<Vertex, TopoData, vertex_key_order> MMap;
	typedef std::pair<Vertex, TopoData> MPair;
	const Float dpThresh = std::cos(degToRad(maxAngle));

	if (m_normals) {
		delete[] m_normals;
		m_normals = NULL;
	}

	if (m_tangents) {
		delete[] m_tangents;
		m_tangents = NULL;
	}

	Log(EInfo, "Rebuilding the topology of \"%s\" (" SIZE_T_FMT 
			" triangles, " SIZE_T_FMT " vertices, max. angle = %f)", 
			m_name.c_str(), m_triangleCount, m_vertexCount, maxAngle);
	ref<Timer> timer = new Timer();

	MMap vertexToFace;
	std::vector<Point> newPositions;
	std::vector<Point2> newTexcoords;
	std::vector<Spectrum> newColors;
	std::vector<Normal> faceNormals(m_triangleCount);
	Triangle *newTriangles = new Triangle[m_triangleCount];

	newPositions.reserve(m_vertexCount);
	if (m_texcoords != NULL)
		newTexcoords.reserve(m_vertexCount);
	if (m_colors != NULL)
		newColors.reserve(m_vertexCount);

	/* Create an associative list and precompute a few things */
	for (size_t i=0; i<m_triangleCount; ++i) {
		const Triangle &tri = m_triangles[i];
		Vertex v;
		for (int j=0; j<3; ++j) {
			v.p = m_positions[tri.idx[j]];
			if (m_texcoords)
				v.uv = m_texcoords[tri.idx[j]];
			if (m_colors)
				v.col = m_colors[tri.idx[j]];
			vertexToFace.insert(MPair(v, TopoData(i, false)));
		}
		Point v0 = m_positions[tri.idx[0]];
		Point v1 = m_positions[tri.idx[1]];
		Point v2 = m_positions[tri.idx[2]];
		faceNormals[i] = Normal(normalize(cross(v1 - v0, v2 - v0)));
		for (int j=0; j<3; ++j)
			newTriangles[i].idx[j] = 0xFFFFFFFFU;
	}

	/* Under the reasonable assumption that the vertex degree is
	   bounded by a constant, the following runs in O(n) */
	for (MMap::iterator it = vertexToFace.begin(); it != vertexToFace.end();) {
		MMap::iterator start = vertexToFace.lower_bound(it->first);
		MMap::iterator end = vertexToFace.upper_bound(it->first);

		/* Perform a greedy clustering of normals */
		for (MMap::iterator it2 = start; it2 != end; it2++) {
			const Vertex &v = it2->first;
			const TopoData &t1 = it2->second;
			Normal n1(faceNormals[t1.idx]);
			if (t1.clustered)
				continue;

			uint32_t vertexIdx = (uint32_t) newPositions.size();
			newPositions.push_back(v.p);
			if (m_texcoords)
				newTexcoords.push_back(v.uv);
			if (m_colors)
				newColors.push_back(v.col);

			for (MMap::iterator it3 = it2; it3 != end; ++it3) {
				TopoData &t2 = it3->second;
				if (t2.clustered)
					continue;
				Normal n2(faceNormals[t2.idx]);

				if (n1 == n2 || dot(n1, n2) > dpThresh) {
					const Triangle &tri = m_triangles[t2.idx];
					Triangle &newTri = newTriangles[t2.idx];
					for (int i=0; i<3; ++i) {
						if (m_positions[tri.idx[i]] == v.p)
							newTri.idx[i] = vertexIdx;
					}
					t2.clustered = true;
				}
			}
		}

		it = end;
	}

	for (size_t i=0; i<m_triangleCount; ++i) 
		for (int j=0; j<3; ++j)
			Assert(newTriangles[i].idx[j] != 0xFFFFFFFFU);

	delete[] m_triangles;
//.........这里部分代码省略.........

void GenerateDescRecC(std::wostream& os,
    Grammar& g,
    MMap& map,
    const std::wstring& tokenPrefix,
    const std::wstring& parserFileSuffix)
{
    if (map.empty())
    {
        return;
    }

    PrintGeneratedFileHeader(os);
    PrintGeneratedFileLicense(os);


    os << L"\n";
    os << L"#include \"stdafx.h\"\n";
    os << L"#include <assert.h>\n";
    os << L"\n";
    os << L"#include \"" << g.GetModuleName() << L"Lex.h\"\n";
    os << L"#include \"" << g.GetModuleName() << parserFileSuffix << L".h\"\n";
    os << L"\n";
    os << L"\n";
    //os << L"#include \"sstream.h\"\n";
    //os << L"#include \"errors.h\"\n";
    os << L"\n";
    os << L"\n";
    PrintActionsNames(os, g, false);
    //PrintActions(os, g, false);
    os << L"\n";

    

    PrintFowardDeclarations(os, g, map);

    std::wstring ws(SourceCode);
    find_replace(ws, L"{GRAMMAR}", g.GetLanguageName());
    find_replace(ws, L"{MODULE}", g.GetLanguageName());

    os << ws;


    int i = 0;
    int currentRuleIndex = -1;
    auto it = map.begin();
    int rulecount = 0;

    for (; it != map.end();)
    {
        int currentRuleIndex = it->m_pNotTerminal->GetIndex();
        //Faz todos desta regra (até ela mudar)
        os << L"Result " << GetFunctionName(g, it->m_pNotTerminal->GetName()) << L"( " << g.GetLanguageName() + L"_Context* ctx)\n";
        os << L"{\n";
        os << TAB_1 << L"Result result = RESULT_OK;\n";
        os << TAB_1 << L"" << g.GetLanguageName() << L"_Tokens token = ctx->token; \n";
        os << L"\n";

        int sub = 0;
        rulecount = 0;

        while (it->m_pNotTerminal->GetIndex() == currentRuleIndex)
        {
            int currentResultIndex = it->m_RuleIndex;
            //faz todos que resultam na mesma producao
            int count = 0;

            while (currentResultIndex == it->m_RuleIndex)
            {
                if (count == 0)
                {
                    os << TAB_1;

                    if (rulecount > 0)
                    {
                        os << L"else ";
                    }

                    os << L"if (token == " << tokenPrefix << it->m_pTerminal->GetName();
                }
                else
                {
                    os << L" ||\n";
                    os << TAB_1 << L"    token == " << tokenPrefix << it->m_pTerminal->GetName();
                }

                auto itcopy = it;
                it++;
                count++;

                if (it == map.end() ||
                    currentResultIndex != it->m_RuleIndex)
                {
                    os << L")\n"; //fecha if
                    const Production& production = g.GetProduction(itcopy->m_RuleIndex);
                    os << TAB_1 << L"{\n";
                    os << TAB__2;
                    os << L"/*";
                    Print(os, production);
                    os << L"*/\n";
                    PrintProduction(os, production, g, tokenPrefix, TAB__2);
//.........这里部分代码省略.........