traxys/tree-sitter
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Remove unused ‘unexpected token’ handling

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This commit is contained in:
Max Brunsfeld 2014-02-06 09:06:52 -08:00
parent d3d25f2683
commit 8b1aeee0e3
5 changed files with 14 additions and 68 deletions
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36
src/compiler/generate_code/c_code.cpp
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@ -142,34 +142,18 @@ namespace tree_sitter {
string code_for_parse_actions(const unordered_set<ParseAction> &actions, const unordered_set<rules::Symbol> &expected_inputs) {
auto action = actions.begin();
if (action == actions.end()) {
return parse_error_call(expected_inputs);
} else {
switch (action->type) {
case ParseActionTypeAccept:
return "ACCEPT_INPUT();";
case ParseActionTypeShift:
return "SHIFT(" + to_string(action->state_index) + ");";
case ParseActionTypeReduce:
return "REDUCE(" + symbol_id(action->symbol) + ", " + to_string(action->child_flags.size()) + ", COLLAPSE({" + collapse_flags(action->child_flags) + "}));";
default:
return "";
}
switch (action->type) {
case ParseActionTypeAccept:
return "ACCEPT_INPUT();";
case ParseActionTypeShift:
return "SHIFT(" + to_string(action->state_index) + ");";
case ParseActionTypeReduce:
return "REDUCE(" + symbol_id(action->symbol) + ", " + to_string(action->child_flags.size()) + ", COLLAPSE({" + collapse_flags(action->child_flags) + "}));";
default:
return "";
}
}
string parse_error_call(const unordered_set<rules::Symbol> &expected_inputs) {
string result = "PARSE_ERROR(" + to_string(expected_inputs.size()) + ", EXPECT({";
bool started = false;
for (auto symbol : expected_inputs) {
if (started) result += ", ";
started = true;
result += "\"" + symbol.name + "\"";
}
result += "}));";
return result;
}
string escape_string(string input) {
str_replace(input, "\"", "\\\"");
return input;
@ -211,7 +195,7 @@ namespace tree_sitter {
string body = "";
for (auto pair : parse_state.actions)
body += _case(symbol_id(pair.first), code_for_parse_actions(pair.second, parse_state.expected_inputs()));
body += _default(parse_error_call(parse_state.expected_inputs()));
body += _default("PARSE_PANIC();");
return
string("SET_LEX_STATE(") + to_string(parse_state.lex_state_index) + ");\n" +
_switch("LOOKAHEAD_SYM()", body);