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Named rules

This commit is contained in:
Thomas Avé 2017-01-20 13:45:35 +01:00
parent 6426beec15
commit adb8d3db97
3 changed files with 8 additions and 5 deletions
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1
examples/json/.gitignore vendored
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@ -2,3 +2,4 @@ JSONLexer.h
JSONLexer.cpp JSONLexer.cpp
JSONParser.h JSONParser.h
JSONParser.cpp JSONParser.cpp
json

6
include/Parsodus/backends/cppLR.h
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@ -73,9 +73,9 @@ namespace backends {
std::map<const std::string, templ::TemplateContext> r; std::map<const std::string, templ::TemplateContext> r;
r["index"] = templ::make_string(std::to_string(i)); r["index"] = templ::make_string(std::to_string(i));
r["rhs_length"] = templ::make_string(std::to_string(grammar.rules[i]->tail.size())); r["rhs_length"] = templ::make_string(std::to_string(grammar.rules[i]->tail.size()));
if (false /* the rule has a name */) { if (grammar.rules[i]->name.length()) {
r["rname"] = templ::make_string(""); //The name r["rname"] = templ::make_string(grammar.rules[i]->name); //The name
rulenames.insert(""); //The name rulenames.insert(grammar.rules[i]->name); //The name
} else { } else {
rulenames.insert(std::to_string(i)); rulenames.insert(std::to_string(i));
} }

6
include/Parsodus/grammar.h
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@ -18,6 +18,7 @@ namespace pds {
struct Rule { struct Rule {
std::string head; ///< The replaced variable std::string head; ///< The replaced variable
std::vector<std::string> tail; ///< The replacement rule std::vector<std::string> tail; ///< The replacement rule
const std::string name; ///< An optional name for this rule, if it's empty, there's no name
bool operator<(const Rule& other) const { bool operator<(const Rule& other) const {
if(head != other.head){ if(head != other.head){
@ -27,8 +28,9 @@ namespace pds {
} }
} }
Rule() : head(""), tail() {} Rule() : head(""), tail(), name("") {}
Rule(const std::string& h, const std::vector<std::string>& t) : head(h), tail(t) {} Rule(const std::string& h, const std::vector<std::string>& t) : head(h), tail(t), name("") {}
Rule(const std::string& h, const std::vector<std::string>& t, const std::string& name) : head(h), tail(t), name(name) {}
}; };
enum class PrecedenceType { enum class PrecedenceType {