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QueryParser/Parse.cpp at master · Monaghan-Boy/QueryParser · GitHub
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#
include
"
Parse.h
"
#
include
<
vector
>
#
include
<
iostream
>
#
include
<
sstream
>
//
#define MATCH
//
#define EXC
//
#define DP
//
#define PARSE
//
#define QUERY
using
namespace
std
;
void
Parser::match
(tokenType token) {
#
ifdef
MATCH
cout <<
"
Token:
"
<< token <<
"
, Matching token:
"
<< tokenList[itr].
toString
() << endl;
#
endif
if
(token == tokenList[itr].
getType
()) {
if
(tokenList[itr].
getType
() ==
STRING
) hold.
addDomain
(tokenList[itr].
getValue
());
itr++;
}
else
{
#
ifdef
MATCH
cout <<
"
Throwing token exception
\n
"
;
#
endif
throw
tokenList[itr];
}
}
DatalogProgram
Parser::parse
(){
#
ifdef
PARSE
cout <<
"
Calling Parser::parse
\n
"
;
#
endif
try
{
datalogProgram
();
match
(
END
);
}
catch
(Token& t) {
output =
"
Failure!
\n
"
+ t.
toString
();
}
return
hold;
}
DatalogProgram
Parser::datalogProgram
(){
#
ifdef
DP
cout <<
"
Calling Parser::datalogProgram
\n
"
;
#
endif
vector<Rule> r;
vector<Predicate> p;
vector<Predicate> q;
match
(
SCHEMES
);
match
(
COLON
);
p.
push_back
(
scheme
());
q =
schemeList
();
p.
insert
(p.
end
(), q.
begin
(), q.
end
());
hold.
addSchemes
(p);
p.
clear
();
q.
clear
();
match
(
FACTS
);
match
(
COLON
);
p =
factList
();
hold.
addFacts
(p);
p.
clear
();
match
(
RULES
);
match
(
COLON
);
r =
ruleList
();
hold.
addRules
(r);
match
(
QUERIES
);
match
(
COLON
);
p.
push_back
(
query
());
q =
queryList
();
p.
insert
(p.
end
(), q.
begin
(), q.
end
());
hold.
addQueries
(p);
return
hold;
}
vector<Predicate>
Parser::schemeList
(){
vector<Predicate> p;
vector<Predicate> q;
if
(tokenList[itr].
getType
() !=
FACTS
){
p.
push_back
(
scheme
());
q =
schemeList
();
p.
insert
(p.
end
(), q.
begin
(), q.
end
());
}
return
p;
}
Predicate
Parser::scheme
(){
Predicate p =
predicate
();
return
p;
}
vector<Predicate>
Parser::factList
(){
vector<Predicate> p;
vector<Predicate> q;
if
(tokenList[itr].
getType
() !=
RULES
){
p.
push_back
(
fact
());
q =
factList
();
p.
insert
(p.
end
(), q.
begin
(), q.
end
());
}
return
p;
}
Predicate
Parser::fact
(){
Predicate p =
predicate
();
match
(
PERIOD
);
return
p;
}
vector<Rule>
Parser::ruleList
(){
vector<Rule> r;
vector<Rule> q;
if
(tokenList[itr].
getType
() !=
QUERIES
){
r.
push_back
(
rule
());
q =
ruleList
();
r.
insert
(r.
end
(), q.
begin
(), q.
end
());
}
return
r;
}
Rule
Parser::rule
(){
Rule r;
vector<Predicate> p;
vector<Predicate> q;
r.
setName
(
predicate
());
match
(
COLON_DASH
);
p.
push_back
(
predicate
());
q =
predicateList
();
p.
insert
(p.
end
(), q.
begin
(), q.
end
());
match
(
PERIOD
);
r.
addPredicates
(p);
return
r;
}
vector<Predicate>
Parser::queryList
(){
#
ifdef
QUERY
cout <<
"
Calling Parser::queryList
\n
"
;
#
endif
vector<Predicate> p;
vector<Predicate> q;
//
stop looking for more queries once the end of file token is reached
if
(tokenList[itr].
getType
() !=
END
){
p.
push_back
(
query
());
q =
queryList
();
p.
insert
(p.
end
(), q.
begin
(), q.
end
());
}
return
p;
}
Predicate
Parser::query
(){
#
ifdef
QUERY
cout <<
"
Calling Parser::query
\n
"
;
#
endif
Predicate p =
predicate
();
match
(
Q_MARK
);
return
p;
}
vector<Predicate>
Parser::predicateList
(){
vector<Predicate> p;
vector<Predicate> q;
if
(tokenList[itr].
getType
() !=
PERIOD
) {
match
(
COMMA
);
p.
push_back
(
predicate
());
q =
predicateList
();
p.
insert
(p.
end
(), q.
begin
(), q.
end
());
}
return
p;
}
Predicate
Parser::predicate
(){
Predicate
pre
;
vector<Parameter> par;
vector<Parameter> qar;
pre
.
setName
(tokenList[itr].
getValue
());
match
(
ID
);
match
(
LEFT_PAREN
);
par.
push_back
(
parameter
());
qar =
parameterList
();
par.
insert
(par.
end
(), qar.
begin
(), qar.
end
());
pre
.
addParameters
(par);
match
(
RIGHT_PAREN
);
return
pre
;
}
vector<Parameter>
Parser::parameterList
(){
vector<Parameter> p;
vector<Parameter> q;
if
(tokenList[itr].
getType
() !=
RIGHT_PAREN
) {
match
(
COMMA
);
p.
push_back
(
parameter
());
q =
parameterList
();
p.
insert
(p.
end
(), q.
begin
(), q.
end
());
}
return
p;
}
Parameter
Parser::parameter
(){
Parameter p;
if
(tokenList[itr].
getType
() ==
STRING
)
match
(
STRING
);
else
if
(tokenList[itr].
getType
() ==
ID
)
match
(
ID
);
else
{
throw
tokenList[itr];
#
ifdef
EXC
cout <<
"
Token exception thrown in Parser::parameter()
\n
"
;
#
endif
}
p.
setName
(tokenList[itr -
1
].
getValue
());
return
p;
}
void
Parser::printStructures
(string fileName){
//
ofstream outFile;
//
outFile.open(fileName);
if
(output ==
"
"
) {
output = hold.
toString
();
cout <<
"
Success!
\n
"
;
}
cout << output;
}
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