source/programparser.h

   1 #ifndef MSP_GL_PROGRAMPARSER_H_
   2 #define MSP_GL_PROGRAMPARSER_H_
   3
   4 #include <deque>
   5 #include <map>
   6 #include <set>
   7 #include <string>
   8 #include <msp/io/base.h>
   9 #include "programsyntax.h"
  10
  11 namespace Msp {
  12 namespace GL {
  13
  14 class ProgramParser
  15 {
  16 private:
  17         enum OperatorType
  18         {
  19                 NO_OPERATOR,
  20                 BINARY,
  21                 PREFIX,
  22                 POSTFIX
  23         };
  24
  25         enum Associativity
  26         {
  27                 LEFT_TO_RIGHT,
  28                 RIGHT_TO_LEFT
  29         };
  30
  31         struct Operator
  32         {
  33                 const char token[4];
  34                 unsigned precedence;
  35                 OperatorType type;
  36                 Associativity assoc;
  37         };
  38
  39         std::string source;
  40         std::string::const_iterator iter;
  41         std::deque<std::string> next_tokens;
  42         ProgramSyntax::Module *module;
  43         ProgramSyntax::Stage *cur_stage;
  44         std::set<std::string> declared_types;
  45
  46         static Operator operators[];
  47
  48 public:
  49         ProgramParser();
  50         ~ProgramParser();
  51
  52         ProgramSyntax::Module &parse(const std::string &);
  53         ProgramSyntax::Module &parse(IO::Base &);
  54
  55 private:
  56         void parse_source();
  57
  58         const std::string &peek_token(unsigned = 0);
  59         std::string parse_token();
  60         std::string parse_token_();
  61         std::string parse_identifier();
  62         std::string parse_number();
  63         std::string parse_other();
  64         bool skip_comment_and_whitespace();
  65         void expect(const std::string &);
  66         std::string expect_type();
  67         std::string expect_identifier();
  68         bool check(const std::string &);
  69
  70         static bool is_interface_qualifier(const std::string &);
  71         static bool is_sampling_qualifier(const std::string &);
  72         static bool is_qualifier(const std::string &);
  73         static bool is_builtin_type(const std::string &);
  74         bool is_type(const std::string &);
  75         bool is_identifier(const std::string &);
  76
  77         ProgramSyntax::Node *parse_global_declaration();
  78         ProgramSyntax::Node *parse_statement();
  79         ProgramSyntax::Import *parse_import();
  80         ProgramSyntax::Layout *parse_layout();
  81         void parse_block(ProgramSyntax::Block &, bool);
  82         ProgramSyntax::Expression *parse_expression(unsigned = 0);
  83         ProgramSyntax::BinaryExpression *parse_binary(ProgramSyntax::Expression *, const Operator *);
  84         ProgramSyntax::FunctionCall *parse_function_call(ProgramSyntax::VariableReference *);
  85         ProgramSyntax::StructDeclaration *parse_struct_declaration();
  86         ProgramSyntax::VariableDeclaration *parse_variable_declaration();
  87         ProgramSyntax::FunctionDeclaration *parse_function_declaration();
  88         ProgramSyntax::InterfaceBlock *parse_interface_block();
  89         ProgramSyntax::Conditional *parse_conditional();
  90         ProgramSyntax::Iteration *parse_iteration();
  91         ProgramSyntax::Passthrough *parse_passthrough();
  92         ProgramSyntax::Return *parse_return();
  93 };
  94
  95 } // namespace GL
  96 } // namespace Msp
  97
  98 #endif