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 source_name;
  41         unsigned source_index;
  42         unsigned current_line;
  43         std::string::const_iterator iter;
  44         std::string::const_iterator source_end;
  45         bool allow_preprocess;
  46         bool allow_stage_change;
  47         std::string last_token;
  48         std::deque<std::string> next_tokens;
  49         ProgramSyntax::Module *module;
  50         ProgramSyntax::Stage *cur_stage;
  51         std::set<std::string> declared_types;
  52
  53         static Operator operators[];
  54
  55 public:
  56         ProgramParser();
  57         ~ProgramParser();
  58
  59         ProgramSyntax::Module &parse(const std::string &, const std::string &, unsigned = 0);
  60         ProgramSyntax::Module &parse(IO::Base &, const std::string &, unsigned = 0);
  61
  62 private:
  63         void parse_source();
  64
  65         std::string format_error(const std::string &);
  66         std::string format_syntax_error(const std::string &);
  67
  68         const std::string &peek_token(unsigned = 0);
  69         const std::string &parse_token();
  70         std::string parse_token_();
  71         std::string parse_identifier();
  72         std::string parse_number();
  73         std::string parse_other();
  74         void skip_comment_and_whitespace();
  75         void expect(const std::string &);
  76         std::string expect_type();
  77         std::string expect_identifier();
  78         bool check(const std::string &);
  79
  80         static bool is_interface_qualifier(const std::string &);
  81         static bool is_sampling_qualifier(const std::string &);
  82         static bool is_interpolation_qualifier(const std::string &);
  83         static bool is_precision_qualifier(const std::string &);
  84         static bool is_qualifier(const std::string &);
  85         static bool is_builtin_type(const std::string &);
  86         bool is_type(const std::string &);
  87         bool is_identifier(const std::string &);
  88
  89         void preprocess();
  90         void preprocess_version();
  91         void preprocess_pragma();
  92         void preprocess_pragma_msp();
  93         void preprocess_stage();
  94
  95         RefPtr<ProgramSyntax::Statement> parse_global_declaration();
  96         RefPtr<ProgramSyntax::Statement> parse_statement();
  97         RefPtr<ProgramSyntax::Import> parse_import();
  98         RefPtr<ProgramSyntax::Precision> parse_precision();
  99         RefPtr<ProgramSyntax::Layout> parse_layout();
 100         void parse_block(ProgramSyntax::Block &, bool);
 101         RefPtr<ProgramSyntax::Expression> parse_expression(unsigned = 0);
 102         RefPtr<ProgramSyntax::BinaryExpression> parse_binary(const RefPtr<ProgramSyntax::Expression> &, const Operator *);
 103         RefPtr<ProgramSyntax::FunctionCall> parse_function_call(const ProgramSyntax::VariableReference &);
 104         RefPtr<ProgramSyntax::StructDeclaration> parse_struct_declaration();
 105         RefPtr<ProgramSyntax::VariableDeclaration> parse_variable_declaration();
 106         RefPtr<ProgramSyntax::FunctionDeclaration> parse_function_declaration();
 107         RefPtr<ProgramSyntax::InterfaceBlock> parse_interface_block();
 108         RefPtr<ProgramSyntax::Conditional> parse_conditional();
 109         RefPtr<ProgramSyntax::Iteration> parse_for();
 110         RefPtr<ProgramSyntax::Iteration> parse_while();
 111         RefPtr<ProgramSyntax::Passthrough> parse_passthrough();
 112         RefPtr<ProgramSyntax::Return> parse_return();
 113 };
 114
 115 } // namespace GL
 116 } // namespace Msp
 117
 118 #endif