diff options
Diffstat (limited to 'include/lexer/token.h')
| -rw-r--r-- | include/lexer/token.h | 198 |
1 files changed, 42 insertions, 156 deletions
diff --git a/include/lexer/token.h b/include/lexer/token.h index ff85ac8..df7ef1b 100644 --- a/include/lexer/token.h +++ b/include/lexer/token.h @@ -4,6 +4,7 @@ #include "lexer/enum_type.h" #include "lexer/shared.h" +#include "lexer/symbol_property.h" using namespace std; // remove this @@ -21,17 +22,6 @@ public: 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"); @@ -42,24 +32,15 @@ string trim_space(const string &s) } -bool is_symbol(char c) +bool is_single_symbol(char c) { - if (c == '&' || c == '|' || c == '(' || c == ')') + string s = " "; + s[0] = c; + if (symbol_property.contains(s)) 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 == '(') @@ -82,27 +63,17 @@ void bracket_depth_changer(char c, int &bracket_depth) } -bool token_continue(string s, char current) +bool token_continue(string s, char next) { - switch (current) - { - case '(': - case ')': - case ':': - case ';': - return false; - default: - break; // empty - } - - // s is empty, so current can be part of the token + println("token_continue: receiving {} {}", s, next); + // s is empty, so next can be part of the token if (s.size() == 0) return true; // text -> text/symbol - if (!is_symbol(s[s.size()-1])) + if (!is_single_symbol(s[s.size()-1])) { // text -> symbol - if (is_symbol(current)) + if (is_single_symbol(next)) return false; // text still @@ -110,104 +81,46 @@ bool token_continue(string s, char current) } // symbol -> symbol - // if it's already && or || - // then added s will be &&& or ||| - // not able to continue - s += current; - if (s == "&&" || s == "||") // previous & or | - // add current & or | - return true; - return false; -} - -void symbol_push(string s, int bracket_depth) -{ - println("pushing {}", s); - if (s.size() == 0) return; - T_token tmp; - tmp.bracket_depth = bracket_depth; - bool operated = false; - if (s.size() >= 2) + T_property tmp; + if (symbol_property.contains(s)) { - 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, "||")) + tmp = symbol_property[s]; + if (tmp.continuable) { - 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 prev_and_next = s + next; + if (symbol_property.contains(prev_and_next)) + return true; + return false; } + return false; } - - 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, "(")) + else { - cout << "( symbol" << endl; - tmp.token_type = LEFT_BRACKET; - operated = true; + println("symbol not found in map"); + return false; } - 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) +void token_push(string push_s, int bracket_depth) { - 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); + string trimmed = trim_space(push_s); if (trimmed == "") return; - tmp.token_type = TEXT; - tmp.text = trimmed; + println("finding {} in map", trimmed); + + if (symbol_property.contains(trimmed)) // symbol + { + tmp.token_type = symbol_property[trimmed].enum_type; + + } + else + { + tmp.token_type = TEXT; + tmp.text = trimmed; + } token.push_back(tmp); } @@ -228,43 +141,16 @@ int tokenizer(string s) println("---"); println("prev {} current char {}", prev, s[i]); - // [prev, i) - // not contain current s[i] - prev_str = s.substr(prev, i-prev); - bool able_continue = token_continue(prev_str, s[i]); - if (!able_continue) - { - token_push(s, i, prev, bracket_depth, is_symbol(prev_str[0])); - prev = i; - - // brackets are always non-continuable - // must store the previous token after changing depth - // otherwise pollute the previous one - bracket_depth_changer(s[i], bracket_depth); + prev_str += s[i]; + bracket_depth_changer(s[i], bracket_depth); + if ((i+1 == len) || !token_continue(prev_str, s[i+1])) + { + token_push(prev_str, bracket_depth); + prev_str = ""; 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; } |