// Parse a method declaration.
static String getMethod(SamTokenizer f) throws TokenizerException {
try {
// The return type for all methods must be int.
myCheck(f, "int");
// methodName stores the name of the method.
String methodName = f.getWord();
if (symMap.containsKey(methodName))
throw new TokenizerException("Error: Duplicate declaration of method " + methodName);
String asmCode = methodName;
// The name of the method <-> index of the symbol table of the method in the symTables vector
symMap.put(methodName, symTables.size());
symTables.addElement(new LinkedHashMap<String, Integer>());
// Since there cannot be another method declaration inside of a, the symbol table we are
// dealing with is
// always the last element of the symTables vector.
symTables.lastElement().put(methodName, 0);
asmCode += ":\n";
myCheck(f, '(');
if (!f.check(')')) {
// No SaM code generated by getFormals
getFormals(f);
myCheck(f, ')');
}
actMap.put(methodName, params.size());
for (int i = 1; i <= params.size(); ++i) {
// Add all formals to the symbol tabel
symTables.lastElement().put(params.elementAt(params.size() - i), -i);
}
asmCode += getBody(f);
// Clear the params vector and set varCounter back to 2.
params.clear();
varCounter = 2;
return asmCode;
} catch (Exception e) {
System.out.println(e.getMessage());
throw new TokenizerException("Error: Invalid method declaration.");
}
}
