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 main_module;
  43         ProgramSyntax::Module *cur_module;
  44         ProgramSyntax::Stage *cur_stage;
  45         std::set<std::string> declared_types;
  46
  47         static Operator operators[];
  48
  49 public:
  50         ProgramSyntax::Module &parse(const std::string &);
  51         ProgramSyntax::Module &parse(IO::Base &);
  52
  53 private:
  54         void parse_source(ProgramSyntax::Module &);
  55
  56         const std::string &peek_token(unsigned = 0);
  57         std::string parse_token();
  58         std::string parse_token_();
  59         std::string parse_identifier();
  60         std::string parse_number();
  61         std::string parse_other();
  62         bool skip_comment_and_whitespace();
  63         void expect(const std::string &);
  64         std::string expect_type();
  65         std::string expect_identifier();
  66         bool check(const std::string &);
  67
  68         static bool is_interface_qualifier(const std::string &);
  69         static bool is_sampling_qualifier(const std::string &);
  70         static bool is_qualifier(const std::string &);
  71         static bool is_builtin_type(const std::string &);
  72         bool is_type(const std::string &);
  73         bool is_identifier(const std::string &);
  74
  75         ProgramSyntax::Node *parse_global_declaration();
  76         ProgramSyntax::Node *parse_statement();
  77         ProgramSyntax::Layout *parse_layout();
  78         void parse_block(ProgramSyntax::Block &, bool);
  79         ProgramSyntax::Expression *parse_expression(unsigned = 0);
  80         ProgramSyntax::BinaryExpression *parse_binary(ProgramSyntax::Expression *, const Operator *);
  81         ProgramSyntax::FunctionCall *parse_function_call(ProgramSyntax::VariableReference *);
  82         ProgramSyntax::StructDeclaration *parse_struct_declaration();
  83         ProgramSyntax::VariableDeclaration *parse_variable_declaration();
  84         ProgramSyntax::FunctionDeclaration *parse_function_declaration();
  85         void parse_function_parameter_list(ProgramSyntax::FunctionDeclaration &);
  86         ProgramSyntax::InterfaceBlock *parse_interface_block();
  87         ProgramSyntax::Conditional *parse_conditional();
  88         ProgramSyntax::Iteration *parse_iteration();
  89         ProgramSyntax::Passthrough *parse_passthrough();
  90         ProgramSyntax::Return *parse_return();
  91 };
  92
  93 } // namespace GL
  94 } // namespace Msp
  95
  96 #endif