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 struct Location
  16 {
  17         std::string name;
  18         unsigned line;
  19 };
  20
  21 class Parser
  22 {
  23 private:
  24         enum OperatorType
  25         {
  26                 NO_OPERATOR,
  27                 BINARY,
  28                 PREFIX,
  29                 POSTFIX
  30         };
  31
  32         enum Associativity
  33         {
  34                 LEFT_TO_RIGHT,
  35                 RIGHT_TO_LEFT
  36         };
  37
  38         struct Operator
  39         {
  40                 const char token[4];
  41                 unsigned precedence;
  42                 OperatorType type;
  43                 Associativity assoc;
  44         };
  45
  46         std::string source;
  47         unsigned source_index;
  48         Location location;
  49         std::string::const_iterator iter;
  50         std::string::const_iterator source_end;
  51         bool allow_preprocess;
  52         bool allow_stage_change;
  53         std::string last_token;
  54         std::deque<std::string> next_tokens;
  55         Module *module;
  56         Stage *cur_stage;
  57         std::set<std::string> declared_types;
  58
  59         static Operator operators[];
  60
  61 public:
  62         Parser();
  63         ~Parser();
  64
  65         Module &parse(const std::string &, const std::string &, unsigned = 0);
  66         Module &parse(IO::Base &, const std::string &, unsigned = 0);
  67
  68 private:
  69         void parse_source();
  70
  71         const std::string &peek_token(unsigned = 0);
  72         const std::string &parse_token();
  73         std::string parse_token_();
  74         std::string parse_identifier();
  75         std::string parse_number();
  76         std::string parse_other();
  77         void skip_comment_and_whitespace();
  78         void expect(const std::string &);
  79         std::string expect_type();
  80         std::string expect_identifier();
  81         bool check(const std::string &);
  82
  83         static bool is_interface_qualifier(const std::string &);
  84         static bool is_sampling_qualifier(const std::string &);
  85         static bool is_interpolation_qualifier(const std::string &);
  86         static bool is_precision_qualifier(const std::string &);
  87         static bool is_qualifier(const std::string &);
  88         static bool is_builtin_type(const std::string &);
  89         bool is_type(const std::string &);
  90         bool is_identifier(const std::string &);
  91
  92         void preprocess();
  93         void preprocess_version();
  94         void preprocess_pragma();
  95         void preprocess_pragma_msp();
  96         void preprocess_stage();
  97
  98         RefPtr<Statement> parse_global_declaration();
  99         RefPtr<Statement> parse_statement();
 100         RefPtr<Import> parse_import();
 101         RefPtr<Precision> parse_precision();
 102         RefPtr<Layout> parse_layout();
 103         void parse_block(Block &, bool);
 104         RefPtr<Expression> parse_expression(unsigned = 0);
 105         RefPtr<BinaryExpression> parse_binary(const RefPtr<Expression> &, const Operator *);
 106         RefPtr<FunctionCall> parse_function_call(const VariableReference &);
 107         RefPtr<StructDeclaration> parse_struct_declaration();
 108         RefPtr<VariableDeclaration> parse_variable_declaration();
 109         RefPtr<FunctionDeclaration> parse_function_declaration();
 110         RefPtr<InterfaceBlock> parse_interface_block();
 111         RefPtr<Conditional> parse_conditional();
 112         RefPtr<Iteration> parse_for();
 113         RefPtr<Iteration> parse_while();
 114         RefPtr<Passthrough> parse_passthrough();
 115         RefPtr<Return> parse_return();
 116 };
 117
 118 } // namespace SL
 119 } // namespace GL
 120 } // namespace Msp
 121
 122 #endif