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[flow] Add support for parsing _ as implicit instantiation in call/new (#8883)

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* [flow] Add support for parsing  as implicit instantiation in call/new

* Update flow tests and fix underscore being a reserved type

* Rebase onto flow-test

* Fix flow commit hash
This commit is contained in:
Jordan Brown 2018-11-05 13:45:40 -05:00 committed by Daniel Tschinder
parent c6d2f45cab
commit f216a7b06f
18 changed files with 1328 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Makefile
View File

@ -1,5 +1,5 @@
MAKEFLAGS = -j1
FLOW_COMMIT = bea8b83f50f597454941d2a7ecef6e93a881e576
FLOW_COMMIT = e192e1a4793dd8e43415fbfe8046d832cb513c8b
TEST262_COMMIT = 72f1cfa2abd66a69b29e9b7d691a8ae8c5a7a00f
# Fix color output until TravisCI fixes https://github.com/travis-ci/travis-ci/issues/7967
@ -82,7 +82,7 @@ test-ci-coverage:
bootstrap-flow:
rm -rf ./build/flow
mkdir -p ./build
git clone --branch=master --single-branch --shallow-since=2017-01-01 https://github.com/facebook/flow.git ./build/flow
git clone --branch=master --single-branch --shallow-since=2018-11-01 https://github.com/facebook/flow.git ./build/flow
cd build/flow && git checkout $(FLOW_COMMIT)
test-flow:

49
packages/babel-parser/src/plugins/flow.js
View File

@ -23,6 +23,9 @@ const primitiveTypes = [
"true",
"typeof",
"void",
"interface",
"extends",
"_",
];
function isEsModuleType(bodyElement: N.Node): boolean {
@ -490,6 +493,15 @@ export default (superClass: Class<Parser>): Class<Parser> =>
return this.finishNode(node, "InterfaceDeclaration");
}
checkNotUnderscore(word: string) {
if (word === "_") {
throw this.unexpected(
null,
"`_` is only allowed as a type argument to call or new",
);
}
}
checkReservedType(word: string, startLoc: number) {
if (primitiveTypes.indexOf(word) > -1) {
this.raise(startLoc, `Cannot overwrite primitive type ${word}`);
@ -654,6 +666,27 @@ export default (superClass: Class<Parser>): Class<Parser> =>
return this.finishNode(node, "TypeParameterInstantiation");
}
flowParseTypeParameterInstantiationCallOrNew(): N.TypeParameterInstantiation {
const node = this.startNode();
const oldInType = this.state.inType;
node.params = [];
this.state.inType = true;
this.expectRelational("<");
while (!this.isRelational(">")) {
node.params.push(this.flowParseTypeOrImplicitInstantiation());
if (!this.isRelational(">")) {
this.expect(tt.comma);
}
}
this.expectRelational(">");
this.state.inType = oldInType;
return this.finishNode(node, "TypeParameterInstantiation");
}
flowParseInterfaceType(): N.FlowInterfaceType {
const node = this.startNode();
this.expectContextual("interface");
@ -1176,6 +1209,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
return this.finishNode(node, "StringTypeAnnotation");
default:
this.checkNotUnderscore(id.name);
return this.flowParseGenericType(startPos, startLoc, id);
}
}
@ -1431,6 +1465,17 @@ export default (superClass: Class<Parser>): Class<Parser> =>
return type;
}
flowParseTypeOrImplicitInstantiation(): N.FlowTypeAnnotation {
if (this.state.type === tt.name && this.state.value === "_") {
const startPos = this.state.start;
const startLoc = this.state.startLoc;
const node = this.parseIdentifier();
return this.flowParseGenericType(startPos, startLoc, node);
} else {
return this.flowParseType();
}
}
flowParseTypeAnnotation(): N.FlowTypeAnnotation {
const node = this.startNode();
node.typeAnnotation = this.flowParseTypeInitialiser();
@ -2582,7 +2627,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
node.callee = base;
const state = this.state.clone();
try {
node.typeArguments = this.flowParseTypeParameterInstantiation();
node.typeArguments = this.flowParseTypeParameterInstantiationCallOrNew();
this.expect(tt.parenL);
node.arguments = this.parseCallExpressionArguments(tt.parenR, false);
if (subscriptState.optionalChainMember) {
@ -2613,7 +2658,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
if (this.shouldParseTypes() && this.isRelational("<")) {
const state = this.state.clone();
try {
targs = this.flowParseTypeParameterInstantiation();
targs = this.flowParseTypeParameterInstantiationCallOrNew();
} catch (e) {
if (e instanceof SyntaxError) {
this.state = state;

8
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_allowed_trailing_commas/input.js vendored Normal file
View File

@ -0,0 +1,8 @@
//@flow
test<
_,
_,
number,
_,
_,
>();

283
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_allowed_trailing_commas/output.json vendored Normal file
View File

@ -0,0 +1,283 @@
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}

2
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_illegal_param_instantiation_otherwise/input.js vendored Normal file
View File

@ -0,0 +1,2 @@
//@flow
var x: Generic<_> = 3;

5
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_illegal_param_instantiation_otherwise/options.json vendored Normal file
View File

@ -0,0 +1,5 @@
{
"sourceType": "module",
"plugins": ["jsx", "flow"],
"throws": "`_` is only allowed as a type argument to call or new (2:16)"
}

2
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_illegal_type_name/input.js vendored Normal file
View File

@ -0,0 +1,2 @@
//@flow
type _ = number;

8
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_illegal_type_name/options.json vendored Normal file
View File

@ -0,0 +1,8 @@
{
"sourceType": "module",
"plugins": [
"jsx",
"flow"
],
"throws": "Cannot overwrite primitive type _ (2:5)"
}

2
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_illegal_type_param_name/input.js vendored Normal file
View File

@ -0,0 +1,2 @@
//@flow
type Generic<_> = _;

8
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_illegal_type_param_name/options.json vendored Normal file
View File

@ -0,0 +1,8 @@
{
"sourceType": "module",
"plugins": [
"jsx",
"flow"
],
"throws": "Cannot overwrite primitive type _ (2:13)"
}

2
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_implicit_anywhere_in_list/input.js vendored Normal file
View File

@ -0,0 +1,2 @@
//@flow
test<number, _, string, _, _, _, Foo, Bar, Baz>();

397
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_implicit_anywhere_in_list/output.json vendored Normal file
View File

@ -0,0 +1,397 @@
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2
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_implicit_in_calls/input.js vendored Normal file
View File

@ -0,0 +1,2 @@
//@flow
test<_>();

169
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_implicit_in_calls/output.json vendored Normal file
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@ -0,0 +1,169 @@
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2
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_implicit_in_methods/input.js vendored Normal file
View File

@ -0,0 +1,2 @@
//@flow
instance.method()<_>();

218
packages/babel-parser/test/fixtures/flow/typeapp-call/underscore_is_implicit_in_methods/output.json vendored Normal file
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@ -0,0 +1,218 @@
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