source/glsl/validate.cpp

   1 #include <msp/core/raii.h>
   2 #include <msp/strings/format.h>
   3 #include "validate.h"
   4
   5 using namespace std;
   6
   7 namespace Msp {
   8 namespace GL {
   9 namespace SL {
  10
  11 Validator::Validator():
  12         stage(0)
  13 { }
  14
  15 void Validator::diagnose(Statement *statement, Diagnostic::Severity severity, const string &message)
  16 {
  17         Diagnostic diag;
  18         diag.severity = severity;
  19         if(statement)
  20         {
  21                 diag.source = statement->source;
  22                 diag.line = statement->line;
  23         }
  24         diag.message = message;
  25         stage->diagnostics.push_back(diag);
  26 }
  27
  28
  29 DeclarationValidator::DeclarationValidator():
  30         anonymous_block(false)
  31 { }
  32
  33 Statement *DeclarationValidator::find_definition(const string &name)
  34 {
  35         BlockDeclarationMap *decls = &declarations[current_block];
  36         BlockDeclarationMap::const_iterator i = decls->find(name);
  37         if(i==decls->end() && anonymous_block)
  38         {
  39                 decls = &declarations[current_block->parent];
  40                 i = decls->find(name);
  41         }
  42         return (i!=decls->end() ? i->second : 0);
  43 }
  44
  45 void DeclarationValidator::check_definition(const string &name, Statement &statement)
  46 {
  47         if(Statement *previous = find_definition(name))
  48         {
  49                 error(&statement, format("Multiple definition of '%s'", name));
  50                 diagnose(previous, Diagnostic::INFO, "Previous definition is here");
  51                 return;
  52         }
  53
  54         declarations[current_block].insert(make_pair(name, &statement));
  55         if(anonymous_block)
  56                 declarations[current_block->parent].insert(make_pair(name, &statement));
  57 }
  58
  59 void DeclarationValidator::visit(VariableDeclaration &var)
  60 {
  61         check_definition(var.name, var);
  62         TraversingVisitor::visit(var);
  63 }
  64
  65 void DeclarationValidator::visit(InterfaceBlock &iface)
  66 {
  67         check_definition(iface.name, iface);
  68         if(!iface.instance_name.empty())
  69                 check_definition(iface.instance_name, iface);
  70         SetFlag set_anon(anonymous_block, iface.instance_name.empty());
  71         TraversingVisitor::visit(iface);
  72 }
  73
  74 void DeclarationValidator::visit(FunctionDeclaration &func)
  75 {
  76         if(func.definition==&func)
  77                 check_definition(func.name, func);
  78         TraversingVisitor::visit(func);
  79 }
  80
  81 } // namespace SL
  82 } // namespace GL
  83 } // namespace Msp