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Improve search engine with new operators and new fields

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This commit is contained in:
Luis Ángel San Martín
2023-05-21 20:29:13 +02:00
parent 117d65ffbe
commit 6d457be912
5 changed files with 150 additions and 29 deletions
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49
YACReaderLibrary/db/query_lexer.cpp
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@ -17,6 +17,14 @@ Token QueryLexer::next()
case '(':
case ')':
return single(Token::Type::opcode);
case ':':
return single(Token::Type::equal);
case '=':
return equal();
case '<':
return minor();
case '>':
return major();
case '"':
return quotedWord();
default:
@ -44,7 +52,7 @@ Token QueryLexer::word()
auto start = index;
get();
auto current = peek();
while (current != '\0' && !isSpace(current) && current != '"' && current != '(' && current != ')') {
while (current != '\0' && !isSpace(current) && current != '"' && current != '(' && current != ')' && current != ':' && current != '=' && current != '<' && current != '>') {
get();
current = peek();
}
@ -70,6 +78,45 @@ Token QueryLexer::quotedWord()
return Token(Token::Type::eof);
}
Token QueryLexer::minor()
{
auto start = index;
get();
auto current = peek();
if (current == '=') {
get();
return Token(Token::Type::minorOrEqual, input.substr(start, index - start));
}
return Token(Token::Type::minor, input.substr(start, index - start));
}
Token QueryLexer::major()
{
auto start = index;
get();
auto current = peek();
if (current == '=') {
get();
return Token(Token::Type::majorOrEqual, input.substr(start, index - start));
}
return Token(Token::Type::major, input.substr(start, index - start));
}
Token QueryLexer::equal()
{
auto start = index;
get();
auto current = peek();
if (current == '=') {
get();
return Token(Token::Type::exactEqual, input.substr(start, index - start));
}
return Token(Token::Type::equal, input.substr(start, index - start));
}
bool QueryLexer::isSpace(char c)
{
switch (c) {