source/glsl/parser.h

   1 #ifndef MSP_GL_SL_PARSER_H_
   2 #define MSP_GL_SL_PARSER_H_
   3
   4 #include <deque>
   5 #include <map>
   6 #include <set>
   7 #include <string>
   8 #include <msp/io/base.h>
   9 #include "syntax.h"
  10
  11 namespace Msp {
  12 namespace GL {
  13 namespace SL {
  14
  15 class Parser
  16 {
  17 private:
  18         enum OperatorType
  19         {
  20                 NO_OPERATOR,
  21                 BINARY,
  22                 PREFIX,
  23                 POSTFIX
  24         };
  25
  26         enum Associativity
  27         {
  28                 LEFT_TO_RIGHT,
  29                 RIGHT_TO_LEFT
  30         };
  31
  32         struct Operator
  33         {
  34                 const char token[4];
  35                 unsigned precedence;
  36                 OperatorType type;
  37                 Associativity assoc;
  38         };
  39
  40         std::string source;
  41         std::string source_name;
  42         unsigned source_index;
  43         unsigned current_line;
  44         std::string::const_iterator iter;
  45         std::string::const_iterator source_end;
  46         bool allow_preprocess;
  47         bool allow_stage_change;
  48         std::string last_token;
  49         std::deque<std::string> next_tokens;
  50         Module *module;
  51         Stage *cur_stage;
  52         std::set<std::string> declared_types;
  53
  54         static Operator operators[];
  55
  56 public:
  57         Parser();
  58         ~Parser();
  59
  60         Module &parse(const std::string &, const std::string &, unsigned = 0);
  61         Module &parse(IO::Base &, const std::string &, unsigned = 0);
  62
  63 private:
  64         void parse_source();
  65
  66         std::string format_error(const std::string &);
  67         std::string format_syntax_error(const std::string &);
  68
  69         const std::string &peek_token(unsigned = 0);
  70         const std::string &parse_token();
  71         std::string parse_token_();
  72         std::string parse_identifier();
  73         std::string parse_number();
  74         std::string parse_other();
  75         void skip_comment_and_whitespace();
  76         void expect(const std::string &);
  77         std::string expect_type();
  78         std::string expect_identifier();
  79         bool check(const std::string &);
  80
  81         static bool is_interface_qualifier(const std::string &);
  82         static bool is_sampling_qualifier(const std::string &);
  83         static bool is_interpolation_qualifier(const std::string &);
  84         static bool is_precision_qualifier(const std::string &);
  85         static bool is_qualifier(const std::string &);
  86         static bool is_builtin_type(const std::string &);
  87         bool is_type(const std::string &);
  88         bool is_identifier(const std::string &);
  89
  90         void preprocess();
  91         void preprocess_version();
  92         void preprocess_pragma();
  93         void preprocess_pragma_msp();
  94         void preprocess_stage();
  95
  96         RefPtr<Statement> parse_global_declaration();
  97         RefPtr<Statement> parse_statement();
  98         RefPtr<Import> parse_import();
  99         RefPtr<Precision> parse_precision();
 100         RefPtr<Layout> parse_layout();
 101         void parse_block(Block &, bool);
 102         RefPtr<Expression> parse_expression(unsigned = 0);
 103         RefPtr<BinaryExpression> parse_binary(const RefPtr<Expression> &, const Operator *);
 104         RefPtr<FunctionCall> parse_function_call(const VariableReference &);
 105         RefPtr<StructDeclaration> parse_struct_declaration();
 106         RefPtr<VariableDeclaration> parse_variable_declaration();
 107         RefPtr<FunctionDeclaration> parse_function_declaration();
 108         RefPtr<InterfaceBlock> parse_interface_block();
 109         RefPtr<Conditional> parse_conditional();
 110         RefPtr<Iteration> parse_for();
 111         RefPtr<Iteration> parse_while();
 112         RefPtr<Passthrough> parse_passthrough();
 113         RefPtr<Return> parse_return();
 114 };
 115
 116 } // namespace SL
 117 } // namespace GL
 118 } // namespace Msp
 119
 120 #endif