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-rw-r--r--src/parser.h70
1 files changed, 68 insertions, 2 deletions
diff --git a/src/parser.h b/src/parser.h
index 26b15a6..e720e54 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -1,8 +1,12 @@
1#ifndef BU_PARSER_H 1#ifndef BU_PARSER_H
2#define BU_PARSER_H 2#define BU_PARSER_H
3 3
4#include "bu/list.h"
5#include "bu/fstring.h" 4#include "bu/fstring.h"
5#include "bu/list.h"
6#include "bu/array.h"
7#include "bu/hash.h"
8#include "bu/signals.h"
9
6#include "bu/lexer.h" 10#include "bu/lexer.h"
7 11
8namespace Bu 12namespace Bu
@@ -35,13 +39,75 @@ namespace Bu
35 */ 39 */
36 void parse(); 40 void parse();
37 41
42 void setRootNonTerminal( int iRoot );
43 void setRootNonTerminal( const Bu::FString &sRoot );
44
45 typedef Bu::Signal1<void, Parser &> Reduction;
46
47 /**
48 * Represents a possible state, either a terminal or non-terminal symbol
49 * in a Production.
50 */
51 class State
52 {
53 public:
54 enum Type
55 {
56 typeTerminal,
57 typeTerminalPush,
58 typeNonTerminal,
59 typeReduction
60 };
61
62 State( Type eType, int iIndex );
63 virtual ~State();
64
65 private:
66 Type eType;
67 int iIndex;
68 };
69
70 typedef Bu::List<State> Production;
71
72 class NonTerminal
73 {
74 public:
75 NonTerminal();
76 virtual ~NonTerminal();
77
78 void addProduction( Production p );
79
80 private:
81 typedef Bu::List<Production> ProductionList;
82 ProductionList lProduction;
83 };
84
85 int addNonTerminal( const Bu::FString &sName, NonTerminal &nt );
86 int addNonTerminal( const Bu::FString &sName );
87 void setNonTerminal( const Bu::FString &sName, NonTerminal &nt );
88 int getNonTerminalId( const Bu::FString &sName );
89
90 int addReduction( const Bu::FString &sName, const Reduction &r );
91 int addReduction( const Bu::FString &sName );
92 void setReduction( const Bu::FString &sName, const Reduction &r );
93 int getReductionId( const Bu::FString &sName );
94
38 private: 95 private:
39 typedef Bu::List<Lexer *> LexerStack; 96 typedef Bu::List<Lexer *> LexerStack;
40 typedef Bu::List<Lexer::Token *> TokenStack; 97 typedef Bu::List<Lexer::Token *> TokenStack;
41 typedef Bu::List<State *> StateStack; 98 typedef Bu::List<Production::const_iterator> StateStack;
99 typedef Bu::Array<Reduction> ReductionArray;
100 typedef Bu::Hash<Bu::FString,int> NameIndexHash;
101 typedef Bu::Array<NonTerminal> NonTerminalArray;
102
42 LexerStack sLexer; 103 LexerStack sLexer;
43 TokenStack sToken; 104 TokenStack sToken;
44 StateStack sState; 105 StateStack sState;
106 ReductionArray aReduction;
107 NameIndexHash hReductionName;
108 NonTerminalArray aNonTerminal;
109 NameIndexHash hNonTerminalName;
110 int iRootNonTerminal;
45 }; 111 };
46}; 112};
47 113