99 lines
3.0 KiB
Plaintext
99 lines
3.0 KiB
Plaintext
import string
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import serialize
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import vector
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import util
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fun null_symbol(): symbol {
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var toRet.construct(string::string("$NULL$"), false, string::string("$NULL$")): symbol
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return toRet
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}
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fun eof_symbol(): symbol {
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var toRet.construct(string::string("$EOF$"), false, string::string("$EOF$")): symbol
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return toRet
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}
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fun invalid_symbol(): symbol {
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var toRet.construct(string::string("$INVALID$"), false, string::string("$INVALID$")): symbol
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return toRet
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}
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fun symbol(nameIn: *char, terminalIn: bool): symbol {
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var toRet.construct(string::string(nameIn), terminalIn, string::string("no_value")): symbol
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return toRet
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}
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fun symbol(nameIn: string::string, terminalIn: bool): symbol {
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var toRet.construct(nameIn, terminalIn, string::string("no_value")): symbol
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return toRet
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}
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fun symbol(nameIn: *char, terminalIn: bool, dataIn: *char): symbol {
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var toRet.construct(string::string(nameIn), terminalIn, string::string(dataIn)): symbol
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return toRet
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}
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fun symbol(nameIn: string::string, terminalIn: bool, dataIn: string::string): symbol {
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var toRet.construct(nameIn, terminalIn, dataIn): symbol
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return toRet
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}
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obj symbol (Object, Serializable) {
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var data: string::string
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var name: string::string
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var terminal: bool
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fun construct(): *symbol {
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data.construct()
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name.construct()
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return this
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}
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fun construct(nameIn: string::string, terminalIn: bool, dataIn: string::string): *symbol {
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name.construct(nameIn)
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terminal = terminalIn
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data.construct(dataIn)
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return this
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}
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fun destruct() {
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data.destruct()
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name.destruct()
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}
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fun copy_construct(old: *symbol) {
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data.copy_construct(&old->data)
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name.copy_construct(&old->name)
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terminal = old->terminal
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}
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fun operator=(old: ref symbol) {
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destruct()
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copy_construct(&old)
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}
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fun serialize(): vector::vector<char> {
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return serialize::serialize(data) + serialize::serialize(name) + serialize::serialize(terminal)
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}
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fun unserialize(it: ref vector::vector<char>, pos: int): int {
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/*construct()*/
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/*util::unpack(data, pos) = serialize::unserialize<string::string>(it, pos)*/
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/*util::unpack(name, pos) = serialize::unserialize<string::string>(it, pos)*/
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pos = data.unserialize(it, pos)
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pos = name.unserialize(it, pos)
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util::unpack(terminal, pos) = serialize::unserialize<bool>(it, pos)
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return pos
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}
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fun equal_wo_data(other: ref symbol): bool {
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return name == other.name && terminal == other.terminal;
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}
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fun operator==(other: ref symbol): bool {
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return data == other.data && name == other.name && terminal == other.terminal;
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}
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fun operator!=(other: ref symbol): bool {
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return !(*this == other);
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}
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fun to_string(): string::string {
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var terminalString: *char
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if (terminal)
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terminalString = "true"
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else
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terminalString = "false"
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return name + ": " + data + " " + terminalString
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}
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}
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