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149 lines (134 loc) · 5.01 KB
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// Copyright (c) Corporation for National Research Initiatives
package org.python.compiler;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.python.antlr.ParseException;
import org.python.antlr.Visitor;
import org.python.antlr.ast.Assign;
import org.python.antlr.ast.Name;
import org.python.antlr.ast.Suite;
import org.python.antlr.ast.Tuple;
import org.python.antlr.ast.arg;
import org.python.antlr.ast.arguments;
import org.python.antlr.ast.expr_contextType;
import org.python.antlr.base.expr;
import org.python.antlr.base.stmt;
import org.python.core.Py;
public class ArgListCompiler extends Visitor
{
public boolean arglist, keywordlist;
public List<expr> defaults;
public List<String> names;
public Map<String, expr> kw_defaults;
public int kwonlyargcount;
public List<String> fpnames;
public List<stmt> init_code;
public Map<String, expr> annotations;
public ArgListCompiler() {
arglist = keywordlist = false;
annotations = new HashMap<>();
defaults = null;
names = new ArrayList<String>();
kw_defaults = new HashMap<>();
fpnames = new ArrayList<String>();
init_code = new ArrayList<stmt>();
}
public void reset() {
arglist = keywordlist = false;
annotations.clear();
defaults = null;
names.clear();
kw_defaults.clear();
init_code.clear();
}
public void appendInitCode(Suite node) {
node.getInternalBody().addAll(0, init_code);
}
public List<expr> getDefaults() {
return defaults;
}
public void addAnnotation(String name, expr annotation) {
if (annotation != null) annotations.put(name, annotation);
}
public void visitArgs(arguments args) throws Exception {
List<arg> argslist = args.getInternalArgs();
String name;
for (int i = 0; i < argslist.size(); i++) {
name = argslist.get(i).getInternalArg();
names.add(name);
addAnnotation(name, argslist.get(i).getInternalAnnotation());
}
if (args.getInternalVararg() != null) {
arglist = true;
name = args.getInternalVararg().getInternalArg();
if (name == null) {
name = ""; // empty name for anonymous star var
}
names.add(name);
addAnnotation(name, args.getInternalVararg().getInternalAnnotation());
}
kwonlyargcount = args.getInternalKwonlyargs().size();
List<arg> kwonlyargs = args.getInternalKwonlyargs();
for (int i = 0; i < kwonlyargcount; i++) {
name = kwonlyargs.get(i).getInternalArg();
names.add(name);
addAnnotation(name, kwonlyargs.get(i).getInternalAnnotation());
}
if (args.getInternalKwarg() != null) {
keywordlist = true;
name = args.getInternalKwarg().getInternalArg();
names.add(name);
addAnnotation(name, args.getInternalKwarg().getInternalAnnotation());
}
List<expr> kwdefaults = args.getInternalKw_defaults();
for (int i = 0; i < kwonlyargcount; i++) {
expr kwDefault = kwdefaults.get(i);
if (kwDefault != null) {
kw_defaults.put(kwonlyargs.get(i).getInternalArg(), kwDefault);
}
}
defaults = new ArrayList<expr>();
List<expr> internalDefaults = args.getInternalDefaults();
for (int i = 0; i < internalDefaults.size(); i++) {
expr val = internalDefaults.get(i);
if (val == null && ! defaults.isEmpty()) {
throw new ParseException(
"non-default argument follows default argument",
args.getInternalArgs().get(args.getInternalArgs().size() - defaults.size() + i));
}
if (val != null) {
defaults.add(val);
}
}
if (names.size() > 255) {
throw Py.SyntaxError("more than 255 arguments");
}
}
@Override
public Object visitName(Name node) throws Exception {
//FIXME: do we need Store and Param, or just Param?
if (node.getInternalCtx() != expr_contextType.Store && node.getInternalCtx() != expr_contextType.Param) {
return null;
}
if (fpnames.contains(node.getInternalId())) {
throw new ParseException("duplicate argument name found: " +
node.getInternalId(), node);
}
fpnames.add(node.getInternalId());
return node.getInternalId();
}
@Override
public Object visitTuple(Tuple node) throws Exception {
StringBuffer name = new StringBuffer("(");
int n = node.getInternalElts().size();
for (int i = 0; i < n-1; i++) {
name.append(visit(node.getInternalElts().get(i)));
name.append(", ");
}
name.append(visit(node.getInternalElts().get(n - 1)));
name.append(")");
return name.toString();
}
}