traxys/tree-sitter
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Remove magic number from generated symbols enums

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The symbol numbers 0 and 1 are reserved for 'error' and 'eof',
so the grammar's start symbol is always 2.
This commit is contained in:
Max Brunsfeld 2014-05-08 13:14:45 -07:00
parent 013572671f
commit 0a21eee3f0
6 changed files with 190 additions and 184 deletions
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11
src/compiler/generate_code/c_code.cc
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@ -204,10 +204,15 @@ namespace tree_sitter {
string symbol_enum() {
string result = "enum {\n";
size_t index = 2;
bool at_start = true;
for (auto symbol : parse_table.symbols)
if (!symbol.is_built_in())
result += indent(symbol_id(symbol)) + " = " + to_string(index++) + ",\n";
if (!symbol.is_built_in()) {
if (at_start)
result += indent(symbol_id(symbol)) + " = ts_start_sym,\n";
else
result += indent(symbol_id(symbol)) + ",\n";
at_start = false;
}
return result + "};";
}