source/glsl/visitor.cpp

   1 #include <msp/core/raii.h>
   2 #include "visitor.h"
   3
   4 using namespace std;
   5
   6 namespace Msp {
   7 namespace GL {
   8 namespace SL {
   9
  10 void NodeVisitor::visit(Assignment &assign)
  11 {
  12         visit(static_cast<BinaryExpression &>(assign));
  13 }
  14
  15
  16 void TraversingVisitor::visit(Block &block)
  17 {
  18         if(&block!=current_block)
  19                 enter(block);
  20         SetForScope<Block *> set_block(current_block, &block);
  21         for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); ++i)
  22                 (*i)->visit(*this);
  23 }
  24
  25 void TraversingVisitor::visit(ParenthesizedExpression &parexpr)
  26 {
  27         parexpr.expression->visit(*this);
  28 }
  29
  30 void TraversingVisitor::visit(MemberAccess &memacc)
  31 {
  32         memacc.left->visit(*this);
  33 }
  34
  35 void TraversingVisitor::visit(UnaryExpression &unary)
  36 {
  37         unary.expression->visit(*this);
  38 }
  39
  40 void TraversingVisitor::visit(BinaryExpression &binary)
  41 {
  42         binary.left->visit(*this);
  43         binary.right->visit(*this);
  44 }
  45
  46 void TraversingVisitor::visit(FunctionCall &call)
  47 {
  48         for(NodeArray<Expression>::iterator i=call.arguments.begin(); i!=call.arguments.end(); ++i)
  49                 (*i)->visit(*this);
  50 }
  51
  52 void TraversingVisitor::visit(ExpressionStatement &expr)
  53 {
  54         expr.expression->visit(*this);
  55 }
  56
  57 void TraversingVisitor::visit(InterfaceLayout &layout)
  58 {
  59         layout.layout.visit(*this);
  60 }
  61
  62 void TraversingVisitor::visit(StructDeclaration &strct)
  63 {
  64         strct.members.visit(*this);
  65 }
  66
  67 void TraversingVisitor::visit(VariableDeclaration &var)
  68 {
  69         if(var.layout)
  70                 var.layout->visit(*this);
  71         if(var.init_expression)
  72                 var.init_expression->visit(*this);
  73         if(var.array_size)
  74                 var.array_size->visit(*this);
  75 }
  76
  77 void TraversingVisitor::visit(InterfaceBlock &iface)
  78 {
  79         iface.members.visit(*this);
  80 }
  81
  82 void TraversingVisitor::visit(FunctionDeclaration &func)
  83 {
  84         enter(func.body);
  85         SetForScope<Block *> set_block(current_block, &func.body);
  86         for(NodeArray<VariableDeclaration>::iterator i=func.parameters.begin(); i!=func.parameters.end(); ++i)
  87                 (*i)->visit(*this);
  88         func.body.visit(*this);
  89 }
  90
  91 void TraversingVisitor::visit(Conditional &cond)
  92 {
  93         cond.condition->visit(*this);
  94         cond.body.visit(*this);
  95         cond.else_body.visit(*this);
  96 }
  97
  98 void TraversingVisitor::visit(Iteration &iter)
  99 {
 100         enter(iter.body);
 101         SetForScope<Block *> set_block(current_block, &iter.body);
 102         if(iter.init_statement)
 103                 iter.init_statement->visit(*this);
 104         if(iter.condition)
 105                 iter.condition->visit(*this);
 106         if(iter.loop_expression)
 107                 iter.loop_expression->visit(*this);
 108         iter.body.visit(*this);
 109 }
 110
 111 void TraversingVisitor::visit(Passthrough &pass)
 112 {
 113         if(pass.subscript)
 114                 pass.subscript->visit(*this);
 115 }
 116
 117 void TraversingVisitor::visit(Return &ret)
 118 {
 119         if(ret.expression)
 120                 ret.expression->visit(*this);
 121 }
 122
 123
 124 NodeRemover::NodeRemover():
 125         stage(0),
 126         to_remove(0),
 127         recursive_remove(false)
 128 { }
 129
 130 void NodeRemover::apply(Stage &s, const set<Node *> &tr)
 131 {
 132         stage = &s;
 133         to_remove = &tr;
 134         s.content.visit(*this);
 135 }
 136
 137 void NodeRemover::remove_variable(map<string, VariableDeclaration *> &vars, VariableDeclaration &decl)
 138 {
 139         map<string, VariableDeclaration *>::iterator i = vars.find(decl.name);
 140         if(i!=vars.end() && i->second==&decl)
 141                 vars.erase(i);
 142 }
 143
 144 void NodeRemover::visit(Block &block)
 145 {
 146         SetForScope<Block *> set_block(current_block, &block);
 147         for(NodeList<Statement>::iterator i=block.body.begin(); i!=block.body.end(); )
 148         {
 149                 (*i)->visit(*this);
 150                 if(to_remove->count(i->get()))
 151                         block.body.erase(i++);
 152                 else
 153                         ++i;
 154         }
 155 }
 156
 157 void NodeRemover::visit(StructDeclaration &strct)
 158 {
 159         if(to_remove->count(&strct))
 160                 current_block->types.erase(strct.name);
 161 }
 162
 163 void NodeRemover::visit(VariableDeclaration &var)
 164 {
 165         if(recursive_remove || to_remove->count(&var))
 166         {
 167                 remove_variable(current_block->variables, var);
 168                 if(current_block->anonymous && current_block->parent)
 169                         remove_variable(current_block->parent->variables, var);
 170                 remove_variable(stage->in_variables, var);
 171                 remove_variable(stage->out_variables, var);
 172                 stage->locations.erase(var.name);
 173                 if(var.linked_declaration)
 174                         var.linked_declaration->linked_declaration = 0;
 175         }
 176         else if(var.init_expression && to_remove->count(var.init_expression.get()))
 177                 var.init_expression = 0;
 178 }
 179
 180 void NodeRemover::visit(InterfaceBlock &iface)
 181 {
 182         SetFlag set_recursive(recursive_remove, recursive_remove || to_remove->count(&iface));
 183         TraversingVisitor::visit(iface);
 184 }
 185
 186 void NodeRemover::visit(Iteration &iter)
 187 {
 188         if(to_remove->count(iter.init_statement.get()))
 189                 iter.init_statement = 0;
 190         TraversingVisitor::visit(iter);
 191 }
 192
 193 } // namespace SL
 194 } // namespace GL
 195 } // namespace Msp