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Add support for Flow shorthand import type (#267)

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This commit is contained in:
Jeff Morrison
2017-01-03 04:52:18 -05:00
committed by Daniel Tschinder
parent 68bb1c6598
commit 9ea4e9dead
6 changed files with 1032 additions and 5 deletions
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52
src/plugins/flow.js
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@@ -1185,6 +1185,58 @@ export default function (instance) {
};
});
// parse import-type/typeof shorthand
instance.extend("parseImportSpecifier", function () {
return function (node) {
let specifier = this.startNode();
const firstIdentLoc = this.state.start;
const firstIdent = this.parseIdentifier(true);
let specifierTypeKind = null;
if (firstIdent.name === "type") {
specifierTypeKind = "type";
} else if (firstIdent.name === "typeof") {
specifierTypeKind = "typeof";
}
if (this.isContextual("as")) {
const as_ident = this.parseIdentifier(true);
if (specifierTypeKind !== null && !this.match(tt.name)) {
// `import {type as ,` or `import {type as }`
specifier.imported = as_ident;
specifier.importKind = specifierTypeKind;
specifier.local = as_ident.__clone();
} else {
// `import {type as foo`
specifier.imported = firstIdent;
specifier.importKind = null;
specifier.local = this.parseIdentifier(false);
}
} else if (specifierTypeKind !== null && this.match(tt.name)) {
// `import {type foo`
specifier.imported = this.parseIdentifier(true);
specifier.importKind = specifierTypeKind;
specifier.local =
this.eatContextual("as")
? this.parseIdentifier(false)
: specifier.imported.__clone();
} else {
if (firstIdent.name === "typeof") {
this.unexpected(
firstIdentLoc,
"Cannot import a variable named `typeof`"
);
}
specifier.imported = firstIdent;
specifier.importKind = null;
specifier.local = specifier.imported.__clone();
}
this.checkLVal(specifier.local, true, undefined, "import specifier");
node.specifiers.push(this.finishNode(specifier, "ImportSpecifier"));
};
});
// parse function type parameters - function foo<T>() {}
instance.extend("parseFunctionParams", function (inner) {
return function (node) {