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#pragma once
#include <string>
#include "lexer/enum_type.h"
#include "lexer/shared.h"
using namespace std; // remove this
namespace ov4
{
class T_token
{
public:
T_token() = default;
enum_token_type token_type;
string text;
guard_type guard = GUARD_OFF;
int bracket_depth = 0;
};
size_t find_non_space_previous(string s, size_t i)
{
size_t len = s.size(), backup = i;
i--; // skip current char
for ( ; i < len; i--)
if (s[i] != ' ')
return i+1; // because region is [x, y)
return backup;
}
string trim_space(const string &s)
{
size_t b = s.find_first_not_of(" \t");
if (b == string::npos)
return "";
size_t e = s.find_last_not_of(" \t");
return s.substr(b, e - b + 1);
}
bool is_symbol(char c)
{
if (c == '&' || c == '|' || c == '(' || c == ')')
return true;
return false;
}
bool is_symbol_same(string x, string y)
{
string tmp = "";
for (size_t i = 0; i < x.size(); i++)
{
if (x[i] != ' ')
tmp += x[i];
}
return (tmp == y);
}
void bracket_depth_changer(char c, int &bracket_depth)
{
if (c == '(')
{
bracket_depth++;
println("changed depth: {}", bracket_depth);
return;
}
if (c == ')')
{
bracket_depth--;
println("changed depth: {}", bracket_depth);
if (bracket_depth < 0)
{
cerr << "Ooooops bracket unmatched, quitting" << endl;
exit(-1); // TODO: std::expected or what, rather than quitting
}
return;
}
}
void symbol_push(string s, int bracket_depth)
{
if (s.size() == 0) return;
T_token tmp;
tmp.bracket_depth = bracket_depth;
bool operated = false;
if (s.size() >= 2)
{
string sub = s.substr(0, 2);
if (is_symbol_same(sub, "&&"))
{
cout << "&& symbol" << endl;
tmp.token_type = LOGIC_AND;
operated = true;
}
else if (is_symbol_same(sub, "||"))
{
cout << "|| symbol" << endl;
tmp.token_type = LOGIC_OR;
operated = true;
}
if (operated)
{
token.push_back(tmp);
string sub_rest = s.substr(2);
symbol_push(sub_rest, bracket_depth);
return;
}
}
string sub = s.substr(0, 1);
if (is_symbol_same(sub, "&"))
{
cout << "& symbol" << endl;
tmp.token_type = ASYNC;
operated = true;
}
else if (is_symbol_same(sub, "|"))
{
cout << "| symbol" << endl;
tmp.token_type = PIPE;
operated = true;
}
else if (is_symbol_same(sub, "("))
{
cout << "( symbol" << endl;
tmp.token_type = LEFT_BRACKET;
operated = true;
}
else if (is_symbol_same(sub, ")"))
{
cout << ") symbol" << endl;
tmp.token_type = RIGHT_BRACKET;
operated = true;
}
if (operated)
{
token.push_back(tmp);
string sub_rest = s.substr(1);
symbol_push(sub_rest, bracket_depth);
return;
}
cerr << "ERROR: is symbol but is not symbol" << endl;
}
// handle [prev, current)
void token_push(string s, size_t current, size_t prev, int bracket_depth, bool is_symbol_prev)
{
string sub = s.substr(prev, current - prev);
cout << "substr " << sub << endl;
if (is_symbol_prev)
{
symbol_push(sub, bracket_depth);
return;
}
T_token tmp;
tmp.bracket_depth = bracket_depth;
string trimmed = trim_space(sub);
if (trimmed == "") return;
tmp.token_type = TEXT;
tmp.text = trimmed;
token.push_back(tmp);
}
int tokenizer(string s)
{
if (s.size() == 0) return -1;
size_t len = s.size();
size_t prev = 0;
size_t token_vector_index = 0;
bool is_in_symbol;
int bracket_depth = 0;
if (is_symbol(s[0]))
is_in_symbol = true;
else
is_in_symbol = false;
for (size_t i = 0; i < len; i++)
{
println("---");
println("prev {} current char {}", prev, s[i]);
// turn from symbol to text
if (is_in_symbol && !is_symbol(s[i]))
{
cout << s[i] <<" symbol -> text" << endl;
is_in_symbol = false;
token_push(s, i, prev, bracket_depth, true);
prev = i;
bracket_depth_changer(s[i], bracket_depth);
continue;
}
// turn from text to symbol
if (!is_in_symbol && is_symbol(s[i]))
{
cout << s[i] << " text -> symbol" << endl;
is_in_symbol = true;
token_push(s, i, prev, bracket_depth, false);
prev = i;
bracket_depth_changer(s[i], bracket_depth);
continue;
}
// symbol changed
if (is_in_symbol && is_symbol(s[i]) && (i != 0 && s[i-1] != s[i]))
{
println("symbol changed from {} to {}", s[i-1], s[i]);
token_push(s, i, prev, bracket_depth, true);
prev = i;
bracket_depth_changer(s[i], bracket_depth);
continue;
}
bracket_depth_changer(s[i], bracket_depth);
// text continue
if (!is_in_symbol && !is_symbol(s[i]))
{
cout << s[i] <<" still text" << endl;
continue;
}
// symbol continue
if (is_in_symbol && is_symbol(s[i]))
{
cout << s[i] <<" still symbol" << endl;
continue;
}
}
if (bracket_depth != 0)
{
cerr << "Brackets are not paired" << endl;
return -1;
}
// final round text
if (!is_symbol(s[len - 1]))
{
cout << s[len - 1] << " final text" << endl;
token_push(s, len, prev, 0, false);
}
// final round symbol
if (is_symbol(s[len - 1]))
{
cout << s[len - 1] << " final symbol" << endl;
token_push(s, len, prev, 0, true);
}
return 0;
}
}
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