-
Notifications
You must be signed in to change notification settings - Fork 1.1k
/
RewriteAsyncIteration.java
61 lines (52 loc) · 2.3 KB
/
RewriteAsyncIteration.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
/*
* Copyright 2014 The Closure Compiler Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.javascript.jscomp;
import com.google.javascript.jscomp.parsing.parser.FeatureSet;
import com.google.javascript.jscomp.parsing.parser.FeatureSet.Feature;
import com.google.javascript.rhino.Node;
/**
* Noop pass reporting an error if scripts attempt to transpile asynchronous generators or
* for-await-of loops - these features are not yet ready to be transpiled.
*/
public final class RewriteAsyncIteration extends NodeTraversal.AbstractPostOrderCallback
implements HotSwapCompilerPass {
static final DiagnosticType CANNOT_CONVERT_ASYNC_ITERATION_YET =
DiagnosticType.error(
"JSC_CANNOT_CONVERT_ASYNC_ITERATION_YET",
"Cannot convert async iteration/generators yet.");
private static final FeatureSet transpiledFeatures =
FeatureSet.BARE_MINIMUM.with(Feature.ASYNC_GENERATORS, Feature.FOR_AWAIT_OF);
private final AbstractCompiler compiler;
public RewriteAsyncIteration(AbstractCompiler compiler) {
this.compiler = compiler;
}
@Override
public void hotSwapScript(Node scriptRoot, Node originalRoot) {
TranspilationPasses.processTranspile(compiler, scriptRoot, transpiledFeatures, this);
TranspilationPasses.maybeMarkFeaturesAsTranspiledAway(compiler, transpiledFeatures);
}
@Override
public void process(Node externs, Node root) {
TranspilationPasses.processTranspile(compiler, root, transpiledFeatures, this);
TranspilationPasses.maybeMarkFeaturesAsTranspiledAway(compiler, transpiledFeatures);
}
@Override
public void visit(NodeTraversal t, Node n, Node parent) {
if (n.isForAwaitOf() || (n.isAsyncFunction() && n.isGeneratorFunction())) {
compiler.report(JSError.make(n, CANNOT_CONVERT_ASYNC_ITERATION_YET));
}
}
}