traxys/tree-sitter
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Make separate Item classes for parsing and lexing

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This commit is contained in:
Max Brunsfeld 2014-01-18 09:47:26 -08:00
parent d015d57a53
commit 289992344e
10 changed files with 132 additions and 117 deletions
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18
src/compiler/build_tables/item_set_closure.cpp
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@ -8,23 +8,27 @@ using std::vector;
namespace tree_sitter {
namespace build_tables {
static bool contains(ItemSet items, Item item) {
static bool contains(ParseItemSet items, ParseItem item) {
return (std::find(items.begin(), items.end(), item) != items.end());
}
static void add_item(ItemSet &item_set, const Item &item, const Grammar &grammar) {
ParseItem parse_item_at_beginning_of_rule(const rules::Symbol &symbol, const Grammar &grammar) {
return ParseItem(symbol.name, grammar.rule(symbol.name), 0);
}
static void add_item(ParseItemSet &item_set, const ParseItem &item, const Grammar &grammar) {
if (!contains(item_set, item)) {
item_set.insert(item);
for (rules::Symbol rule : next_non_terminals(item, grammar)) {
Item next_item = Item::at_beginning_of_rule(rule.name, grammar);
auto next_item = parse_item_at_beginning_of_rule(rule, grammar);
add_item(item_set, next_item, grammar);
}
}
}
const ItemSet item_set_closure(const ItemSet &item_set, const Grammar &grammar) {
ItemSet result;
for (Item item : item_set)
const ParseItemSet item_set_closure(const ParseItemSet &item_set, const Grammar &grammar) {
ParseItemSet result;
for (ParseItem item : item_set)
add_item(result, item, grammar);
return result;
}