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Fixed some bugs in Parser::firstSet and added a bit of caching. It still doesn't work quite right, though, there's some problem with nullable left recursion. However, it's better than it was, and I need to go to bed. More work later.

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Nathan Braswell
2014-06-30 01:57:50 -07:00
parent 12f57f8ce8
commit 03770028ad
19 changed files with 273 additions and 78 deletions
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12
include/ParseRule.h
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@@ -16,10 +16,10 @@ class ParseRule {
ParseRule();
ParseRule(Symbol leftHandle, int pointerIndex, std::vector<Symbol> &rightSide, std::vector<Symbol>* lookahead);
~ParseRule();
const bool equalsExceptLookahead(const ParseRule &other);
bool const operator==(const ParseRule &other);
bool const operator!=(const ParseRule &other);
const bool equalsExceptLookahead(const ParseRule &other) const;
bool const operator==(const ParseRule &other) const;
bool const operator!=(const ParseRule &other) const;
bool const operator<(const ParseRule &other) const; //Used for ordering so we can put ParseRule's in sets, and also so that ParseActions will have an ordering
ParseRule* clone();
void setLeftHandle(Symbol leftHandle);
@@ -40,7 +40,7 @@ class ParseRule {
void addLookahead(std::vector<Symbol>* lookahead);
std::vector<Symbol>* getLookahead();
std::string toString();
std::string toString(bool printLookahead = true);
std::string toDOT();
private:
@@ -51,4 +51,4 @@ class ParseRule {
};
#endif
#endif