/**
* Gets the next token from a tokenizer and converts it to a string.
*
* @return The next token in the stream, as a string.
* @throws TextParseException The input was invalid or not a string.
* @throws IOException An I/O error occurred.
*/
public String getString() throws IOException {
Token next = get();
if (!next.isString()) {
throw exception("expected a string");
}
return next.value;
}
private static ArrayList<String> pushVariable(Token t) throws Exception {
ArrayList<String> res = new ArrayList<>();
Variable v = Alzheimer.variables.get(t.valueWithoutIndex());
if (v == null) {
if (!t.isNumber() && !t.isString() && !t.isCharacter()) {
if (!t.isType()) {
throw new CompilerException("Unknown variable " + t.value, t.file, t.line);
} else {
Type T = Alzheimer.types.get(t.valueBeforeFirstDot());
if (T == null) {
throw new CompilerException("Unknown type " + t.valueBeforeFirstDot(), t.file, t.line);
} else {
switch (t.valueAfterFirstDot()) {
case "size":
exec("push " + T.size() + "; " + t.value, res);
break;
default:
throw new CompilerException(
"Type '"
+ t.valueBeforeFirstDot()
+ "' does not have property '"
+ t.valueAfterFirstDot()
+ "' ",
t.file,
t.line);
}
}
}
} else {
exec("push " + t.value + ";", res);
}
} else {
if (v.isArray && !t.isArray()) {
res.addAll(pushArray(v, t.file, t.line));
} else {
if (t.isArray()) {
v = new Variable();
v.name = t.value;
String alz = "" + v.accessVarName() + "=( " + v.arrayIndex() + " );\n";
res.addAll(Alzheimer.compile(alz));
res.addAll(v.type.push(v.nameWithoutIndex() + "[" + v.accessVarName() + "]"));
} else {
res.addAll(v.type.push(t.value));
}
}
}
return res;
}
private ArrayList<String> expression(ArrayList<Token> tokens) throws Exception {
ArrayList<String> res = new ArrayList<>();
Token opTok = tokens.remove(0);
if (tokens.size() < 1) {
Variable v = Alzheimer.variables.get(opTok.valueWithoutIndex());
if (v == null && !opTok.isType()) {
if (!opTok.isNumber()) {
throw new CompilerException(
"Number, variable or type property expected", opTok.file, opTok.line);
}
res.add("push " + opTok.value + ";");
return res;
}
res.addAll(pushVariable(opTok));
return res;
}
if (!opTok.value.equals("(")) {
if (tokens.size() != 0) {
Token tmp = tokens.remove(0);
if (!tmp.value.equals("(")) {
throw new CompilerException("( expected", tmp.file, tmp.line);
}
} else {
throw new CompilerException("Something is wrong!", opTok.file, opTok.line);
}
}
ArrayList<String> args = new ArrayList<>();
while (tokens.size() != 0) {
Token t;
if (tokens.size() > 1) {
t = tokens.get(1);
if (t.value.equals("(")) {
res.addAll(expression(tokens));
args.add("");
} else {
t = tokens.remove(0);
if (t.value.equals(")")) {
break;
}
if (t.isString()) {
exec(t.pushString(), res);
} else {
res.addAll(pushVariable(t));
}
}
} else {
t = tokens.remove(0);
if (t.value.equals(")")) {
break;
}
if (t.isString()) {
exec(t.pushString(), res);
} else {
res.addAll(pushVariable(t));
}
}
}
switch (opTok.value) {
case "(":
break;
case "+":
case "add":
exec("add", res);
break;
case "-":
case "sub":
exec("sub", res);
break;
case "*":
case "mul":
exec("mul", res);
break;
case "/":
case "div":
exec("div", res);
break;
case "floor":
exec("floor", res);
break;
case "ceil":
exec("ceil", res);
break;
default:
exec("call $" + opTok.value, res);
}
return res;
}