45 lines
1.4 KiB
C++
45 lines
1.4 KiB
C++
|
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
#include "tools/gn/functions.h"
|
||
|
|
#include "tools/gn/parse_tree.h"
|
||
|
|
#include "tools/gn/scope.h"
|
||
|
|
#include "tools/gn/value.h"
|
||
|
|
|
||
|
|
namespace functions {
|
||
|
|
|
||
|
|
const char kDefineRule[] = "define_rule";
|
||
|
|
const char kDefileRule_Help[] =
|
||
|
|
"TODO(brettw) write this.";
|
||
|
|
|
||
|
|
Value RunDefineRule(Scope* scope,
|
||
|
|
const FunctionCallNode* function,
|
||
|
|
const std::vector<Value>& args,
|
||
|
|
BlockNode* block,
|
||
|
|
Err* err) {
|
||
|
|
// TODO(brettw) determine if the function is built-in and throw an error if
|
||
|
|
// it is.
|
||
|
|
if (args.size() != 1) {
|
||
|
|
*err = Err(function->function(),
|
||
|
|
"Need exactly one string arg to define_rule.");
|
||
|
|
return Value();
|
||
|
|
}
|
||
|
|
if (!args[0].VerifyTypeIs(Value::STRING, err))
|
||
|
|
return Value();
|
||
|
|
std::string rule_name = args[0].string_value();
|
||
|
|
|
||
|
|
const FunctionCallNode* existing_rule = scope->GetRule(rule_name);
|
||
|
|
if (existing_rule) {
|
||
|
|
*err = Err(function, "Duplicate rule definition.",
|
||
|
|
"A rule with this name was already defined.");
|
||
|
|
err->AppendSubErr(Err(existing_rule->function(), "Previous definition."));
|
||
|
|
return Value();
|
||
|
|
}
|
||
|
|
|
||
|
|
scope->AddRule(rule_name, function);
|
||
|
|
return Value();
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace functions
|