miloignis/kraken
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

More work, finishing the parse_input and lots of reducer

Browse Source
This commit is contained in:
Nathan Braswell
2015-08-06 17:38:41 -04:00
parent 1f119af8ad
commit 674e7e6538
13 changed files with 315 additions and 75 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
stdlib/grammer.krak
View File

@@ -475,31 +475,48 @@ obj table (Object) {
while (include_state >= items.size)
items.addEnd(map::map<symbol::symbol, vector::vector<action>>())
}
// we always "clean" the symbol before using it so that having different data doesn't
// prevent us from finding the symbol in the table
fun clean_symbol(sym: ref symbol::symbol): symbol::symbol {
return symbol::symbol(sym.name, sym.terminal)
}
fun add_push(from_state: int, on_symbol: ref symbol::symbol, to_state: int) {
expand_to(from_state)
if (items[from_state].contains_key(on_symbol))
items[from_state][on_symbol].addEnd(action(push, to_state))
var cleaned_symbol = clean_symbol(on_symbol)
if (items[from_state].contains_key(cleaned_symbol))
items[from_state][cleaned_symbol].addEnd(action(push, to_state))
else
items[from_state].set(on_symbol, vector::vector(action(push, to_state)))
items[from_state].set(cleaned_symbol, vector::vector(action(push, to_state)))
}
fun add_reduce(from_state: int, on_symbol: ref symbol::symbol, by_rule_no: int) {
expand_to(from_state)
if (items[from_state].contains_key(on_symbol))
items[from_state][on_symbol].addEnd(action(reduce, by_rule_no))
var cleaned_symbol = clean_symbol(on_symbol)
if (items[from_state].contains_key(cleaned_symbol))
items[from_state][cleaned_symbol].addEnd(action(reduce, by_rule_no))
else
items[from_state].set(on_symbol, vector::vector(action(reduce, by_rule_no)))
items[from_state].set(cleaned_symbol, vector::vector(action(reduce, by_rule_no)))
}
fun add_accept(from_state: int, on_symbol: ref symbol::symbol) {
expand_to(from_state)
if (items[from_state].contains_key(on_symbol))
items[from_state][on_symbol].addEnd(action(accept, 0))
var cleaned_symbol = clean_symbol(on_symbol)
if (items[from_state].contains_key(cleaned_symbol))
items[from_state][cleaned_symbol].addEnd(action(accept, 0))
else
items[from_state].set(on_symbol, vector::vector(action(accept, 0)))
items[from_state].set(cleaned_symbol, vector::vector(action(accept, 0)))
}
fun get(state: int, sym: symbol::symbol): vector::vector<action> {
return items[state][sym]
fun get(state: int, on_symbol: symbol::symbol): vector::vector<action> {
var cleaned_symbol = clean_symbol(on_symbol)
return items[state][cleaned_symbol]
}
fun print_string(): string::string {
fun get_shift(state: int, on_symbol: symbol::symbol): action {
var actions = get(state, on_symbol)
for (var i = 0; i < actions.size; i++;)
if (actions[i].act == push)
return actions[i]
io::println("tried to get a shift when none existed")
return action(-1,-1)
}
fun print_string() {
/*return string::string("woo a table of size: ") + items.size*/
io::print("woo a table of size: ")
io::println(items.size)