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finished reducer and wrote shifter. Actually kinda recognizes now! Errors too, but comes up with correct result.

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Nathan Braswell
2015-08-08 02:50:36 -04:00
parent 674e7e6538
commit 216cf0252f
5 changed files with 119 additions and 14 deletions
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30
stdlib/grammer.krak
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@@ -452,6 +452,18 @@ obj action {
fun operator==(other: action): bool {
return act == other.act && state_or_rule == other.state_or_rule
}
fun print() {
if (act == push)
io::print("push ")
else if (act == reduce)
io::print("reduce ")
else if (act == accept)
io::print("accept ")
else if (act == reject)
io::print("reject ")
io::print(state_or_rule)
io::println()
}
}
obj table (Object) {
@@ -514,8 +526,15 @@ obj table (Object) {
if (actions[i].act == push)
return actions[i]
io::println("tried to get a shift when none existed")
io::print("for state ")
io::print(state)
io::print(" and symbol ")
io::println(on_symbol.to_string())
return action(-1,-1)
}
fun get_reduces(state: int, on_symbol: symbol::symbol): vector::vector<action> {
return get(state, on_symbol).filter(fun(act: action):bool { return act.act == reduce; })
}
fun print_string() {
/*return string::string("woo a table of size: ") + items.size*/
io::print("woo a table of size: ")
@@ -528,16 +547,7 @@ obj table (Object) {
io::print("\ton symbol: ")
io::print(sym.to_string())
io::print(" do action: ")
if (action.act == push)
io::print("push ")
else if (action.act == reduce)
io::print("reduce ")
else if (action.act == accept)
io::print("accept ")
else if (action.act == reject)
io::print("reject ")
io::print(action.state_or_rule)
io::println()
action.print()
})
})
}