[flow] Fix parsing of arrows in conditional exprs in parens (#13655)
This commit is contained in:
Nicolò Ribaudo
GitHub
parent
9d0aa1ec9d
commit
e721f61110
@ -1911,24 +1911,21 @@ export default (superClass: Class<Parser>): Class<Parser> =>
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): N.Expression {
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if (!this.match(tt.question)) return expr;
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// only use the expensive "tryParse" method if there is a question mark
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// and if we come from inside parens
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if (this.state.maybeInArrowParameters) {
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const result = this.tryParse(() =>
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super.parseConditional(expr, startPos, startLoc),
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);
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if (!result.node) {
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if (result.error) {
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/*:: invariant(refExpressionErrors != null) */
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super.setOptionalParametersError(refExpressionErrors, result.error);
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}
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const nextCh = this.lookaheadCharCode();
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// These tokens cannot start an expression, so if one of them follows
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// ? then we are probably in an arrow function parameters list and we
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// don't parse the conditional expression.
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if (
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nextCh === charCodes.comma || // (a?, b) => c
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nextCh === charCodes.equalsTo || // (a? = b) => c
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nextCh === charCodes.colon || // (a?: b) => c
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nextCh === charCodes.rightParenthesis // (a?) => c
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) {
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/*:: invariant(refExpressionErrors != null) */
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this.setOptionalParametersError(refExpressionErrors);
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return expr;
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}
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if (result.error) this.state = result.failState;
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return result.node;
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}
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this.expect(tt.question);
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11
packages/babel-parser/test/fixtures/flow/arrows-in-ternaries/issue-13644/input.js
vendored
Normal file
11
packages/babel-parser/test/fixtures/flow/arrows-in-ternaries/issue-13644/input.js
vendored
Normal file
@ -0,0 +1,11 @@
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(a ? (b = c) : d => e); // a ? (b = c) : (d => e)
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(a ? (b += c) : d => e); // a ? (b += c) : (d => e)
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(a ? (b = c) : d => e : f); // a ? ((b = c): d => e) : f
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(a ? (b += c) : d => e : f); // ((a ? (b += c) : (d => e)) : f)
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(a ? b => (c = d) : e => f); // a ? (b => (c = d)) : (e => f)
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(a ? b => (c += d) : e => f); // a ? (b => (c += d)) : (e => f)
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(a ? b => (c = d) : e => f : g); // a ? (b => ((c = d): e => f)) : g
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(a ? b => (c += d) : e => f : g); // ((a ? (b => (c += d)) : (e => f)) : g)
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712
packages/babel-parser/test/fixtures/flow/arrows-in-ternaries/issue-13644/output.json
vendored
Normal file
712
packages/babel-parser/test/fixtures/flow/arrows-in-ternaries/issue-13644/output.json
vendored
Normal file
@ -0,0 +1,712 @@
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{
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"type": "File",
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"start":0,"end":496,"loc":{"start":{"line":1,"column":0},"end":{"line":11,"column":75}},
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"program": {
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"type": "Program",
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"start":0,"end":496,"loc":{"start":{"line":1,"column":0},"end":{"line":11,"column":75}},
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"sourceType": "module",
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"interpreter": null,
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"body": [
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{
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"type": "ExpressionStatement",
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"start":0,"end":23,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":23}},
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"expression": {
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"type": "ConditionalExpression",
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"start":1,"end":21,"loc":{"start":{"line":1,"column":1},"end":{"line":1,"column":21}},
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"test": {
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"type": "Identifier",
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"start":1,"end":2,"loc":{"start":{"line":1,"column":1},"end":{"line":1,"column":2},"identifierName":"a"},
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"name": "a"
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},
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"consequent": {
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"type": "AssignmentExpression",
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"start":6,"end":11,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":11}},
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"operator": "=",
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"left": {
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"type": "Identifier",
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"start":6,"end":7,"loc":{"start":{"line":1,"column":6},"end":{"line":1,"column":7},"identifierName":"b"},
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"name": "b"
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},
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"right": {
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"type": "Identifier",
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"start":10,"end":11,"loc":{"start":{"line":1,"column":10},"end":{"line":1,"column":11},"identifierName":"c"},
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"name": "c"
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},
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"extra": {
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"parenthesized": true,
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"parenStart": 5
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}
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},
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"alternate": {
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"type": "ArrowFunctionExpression",
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"start":15,"end":21,"loc":{"start":{"line":1,"column":15},"end":{"line":1,"column":21}},
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"id": null,
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"generator": false,
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"async": false,
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"params": [
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{
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"type": "Identifier",
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"start":15,"end":16,"loc":{"start":{"line":1,"column":15},"end":{"line":1,"column":16},"identifierName":"d"},
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"name": "d"
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}
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],
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"body": {
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"type": "Identifier",
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"start":20,"end":21,"loc":{"start":{"line":1,"column":20},"end":{"line":1,"column":21},"identifierName":"e"},
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"name": "e"
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}
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},
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"extra": {
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"parenthesized": true,
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"parenStart": 0
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}
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},
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"trailingComments": [
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{
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"type": "CommentLine",
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"value": " a ? (b = c) : (d => e)",
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"start":24,"end":49,"loc":{"start":{"line":1,"column":24},"end":{"line":1,"column":49}}
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}
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]
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},
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{
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"type": "ExpressionStatement",
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"start":50,"end":74,"loc":{"start":{"line":2,"column":0},"end":{"line":2,"column":24}},
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"expression": {
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"type": "ConditionalExpression",
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"start":51,"end":72,"loc":{"start":{"line":2,"column":1},"end":{"line":2,"column":22}},
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"test": {
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"type": "Identifier",
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"start":51,"end":52,"loc":{"start":{"line":2,"column":1},"end":{"line":2,"column":2},"identifierName":"a"},
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"name": "a"
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},
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"consequent": {
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"type": "AssignmentExpression",
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"start":56,"end":62,"loc":{"start":{"line":2,"column":6},"end":{"line":2,"column":12}},
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"operator": "+=",
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"left": {
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"type": "Identifier",
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"start":56,"end":57,"loc":{"start":{"line":2,"column":6},"end":{"line":2,"column":7},"identifierName":"b"},
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"name": "b"
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},
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"right": {
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"type": "Identifier",
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"start":61,"end":62,"loc":{"start":{"line":2,"column":11},"end":{"line":2,"column":12},"identifierName":"c"},
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"name": "c"
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},
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"extra": {
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"parenthesized": true,
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"parenStart": 55
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}
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},
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"alternate": {
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"type": "ArrowFunctionExpression",
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"start":66,"end":72,"loc":{"start":{"line":2,"column":16},"end":{"line":2,"column":22}},
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"id": null,
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"generator": false,
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"async": false,
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"params": [
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{
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"type": "Identifier",
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"start":66,"end":67,"loc":{"start":{"line":2,"column":16},"end":{"line":2,"column":17},"identifierName":"d"},
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"name": "d"
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}
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],
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"body": {
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"type": "Identifier",
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"start":71,"end":72,"loc":{"start":{"line":2,"column":21},"end":{"line":2,"column":22},"identifierName":"e"},
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"name": "e"
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}
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},
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"extra": {
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"parenthesized": true,
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"parenStart": 50
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}
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},
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"trailingComments": [
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{
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"type": "CommentLine",
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"value": " a ? (b += c) : (d => e)",
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"start":75,"end":101,"loc":{"start":{"line":2,"column":25},"end":{"line":2,"column":51}}
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}
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],
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"leadingComments": [
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{
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"type": "CommentLine",
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"value": " a ? (b = c) : (d => e)",
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"start":24,"end":49,"loc":{"start":{"line":1,"column":24},"end":{"line":1,"column":49}}
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}
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]
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},
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{
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"type": "ExpressionStatement",
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"start":103,"end":130,"loc":{"start":{"line":4,"column":0},"end":{"line":4,"column":27}},
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"expression": {
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"type": "ConditionalExpression",
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"start":104,"end":128,"loc":{"start":{"line":4,"column":1},"end":{"line":4,"column":25}},
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"test": {
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"type": "Identifier",
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"start":104,"end":105,"loc":{"start":{"line":4,"column":1},"end":{"line":4,"column":2},"identifierName":"a"},
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"name": "a"
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},
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"consequent": {
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"type": "ArrowFunctionExpression",
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"start":108,"end":124,"loc":{"start":{"line":4,"column":5},"end":{"line":4,"column":21}},
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"predicate": null,
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"returnType": {
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"type": "TypeAnnotation",
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"start":116,"end":119,"loc":{"start":{"line":4,"column":13},"end":{"line":4,"column":16}},
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"typeAnnotation": {
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"type": "GenericTypeAnnotation",
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"start":118,"end":119,"loc":{"start":{"line":4,"column":15},"end":{"line":4,"column":16}},
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"typeParameters": null,
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"id": {
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"type": "Identifier",
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"start":118,"end":119,"loc":{"start":{"line":4,"column":15},"end":{"line":4,"column":16},"identifierName":"d"},
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"name": "d"
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}
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}
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},
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"id": null,
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"generator": false,
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"async": false,
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"params": [
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{
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"type": "AssignmentPattern",
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"start":109,"end":114,"loc":{"start":{"line":4,"column":6},"end":{"line":4,"column":11}},
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"left": {
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"type": "Identifier",
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"start":109,"end":110,"loc":{"start":{"line":4,"column":6},"end":{"line":4,"column":7},"identifierName":"b"},
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"name": "b"
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},
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"right": {
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"type": "Identifier",
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"start":113,"end":114,"loc":{"start":{"line":4,"column":10},"end":{"line":4,"column":11},"identifierName":"c"},
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"name": "c"
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}
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}
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],
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"body": {
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"type": "Identifier",
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"start":123,"end":124,"loc":{"start":{"line":4,"column":20},"end":{"line":4,"column":21},"identifierName":"e"},
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"name": "e"
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}
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},
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"alternate": {
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"type": "Identifier",
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"start":127,"end":128,"loc":{"start":{"line":4,"column":24},"end":{"line":4,"column":25},"identifierName":"f"},
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"name": "f"
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},
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"extra": {
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"parenthesized": true,
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"parenStart": 103
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}
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},
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"trailingComments": [
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{
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"type": "CommentLine",
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"value": " a ? ((b = c): d => e) : f",
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"start":131,"end":159,"loc":{"start":{"line":4,"column":28},"end":{"line":4,"column":56}}
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}
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],
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"leadingComments": [
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{
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"type": "CommentLine",
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"value": " a ? (b += c) : (d => e)",
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"start":75,"end":101,"loc":{"start":{"line":2,"column":25},"end":{"line":2,"column":51}}
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}
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]
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},
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{
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"type": "ExpressionStatement",
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"start":160,"end":188,"loc":{"start":{"line":5,"column":0},"end":{"line":5,"column":28}},
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"expression": {
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"type": "TypeCastExpression",
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"start":161,"end":186,"loc":{"start":{"line":5,"column":1},"end":{"line":5,"column":26}},
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"expression": {
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"type": "ConditionalExpression",
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"start":161,"end":182,"loc":{"start":{"line":5,"column":1},"end":{"line":5,"column":22}},
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"test": {
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"type": "Identifier",
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"start":161,"end":162,"loc":{"start":{"line":5,"column":1},"end":{"line":5,"column":2},"identifierName":"a"},
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"name": "a"
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},
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"consequent": {
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"type": "AssignmentExpression",
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"start":166,"end":172,"loc":{"start":{"line":5,"column":6},"end":{"line":5,"column":12}},
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"operator": "+=",
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"left": {
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"type": "Identifier",
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"start":166,"end":167,"loc":{"start":{"line":5,"column":6},"end":{"line":5,"column":7},"identifierName":"b"},
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"name": "b"
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},
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"right": {
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"type": "Identifier",
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"start":171,"end":172,"loc":{"start":{"line":5,"column":11},"end":{"line":5,"column":12},"identifierName":"c"},
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"name": "c"
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},
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"extra": {
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"parenthesized": true,
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"parenStart": 165
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}
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},
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"alternate": {
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"type": "ArrowFunctionExpression",
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"start":176,"end":182,"loc":{"start":{"line":5,"column":16},"end":{"line":5,"column":22}},
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"id": null,
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"generator": false,
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"async": false,
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"params": [
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{
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"type": "Identifier",
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"start":176,"end":177,"loc":{"start":{"line":5,"column":16},"end":{"line":5,"column":17},"identifierName":"d"},
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"name": "d"
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}
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],
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"body": {
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"type": "Identifier",
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"start":181,"end":182,"loc":{"start":{"line":5,"column":21},"end":{"line":5,"column":22},"identifierName":"e"},
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"name": "e"
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}
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}
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},
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"typeAnnotation": {
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"type": "TypeAnnotation",
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"start":183,"end":186,"loc":{"start":{"line":5,"column":23},"end":{"line":5,"column":26}},
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"typeAnnotation": {
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"type": "GenericTypeAnnotation",
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"start":185,"end":186,"loc":{"start":{"line":5,"column":25},"end":{"line":5,"column":26}},
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"typeParameters": null,
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"id": {
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"type": "Identifier",
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"start":185,"end":186,"loc":{"start":{"line":5,"column":25},"end":{"line":5,"column":26},"identifierName":"f"},
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"name": "f"
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}
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}
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},
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"extra": {
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"parenthesized": true,
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"parenStart": 160
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}
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},
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"trailingComments": [
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{
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"type": "CommentLine",
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"value": " ((a ? (b += c) : (d => e)) : f)",
|
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"start":189,"end":223,"loc":{"start":{"line":5,"column":29},"end":{"line":5,"column":63}}
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}
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],
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"leadingComments": [
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{
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"type": "CommentLine",
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"value": " a ? ((b = c): d => e) : f",
|
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"start":131,"end":159,"loc":{"start":{"line":4,"column":28},"end":{"line":4,"column":56}}
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}
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]
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},
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{
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"type": "ExpressionStatement",
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"start":225,"end":253,"loc":{"start":{"line":7,"column":0},"end":{"line":7,"column":28}},
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"expression": {
|
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"type": "ConditionalExpression",
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"start":226,"end":251,"loc":{"start":{"line":7,"column":1},"end":{"line":7,"column":26}},
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"test": {
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"type": "Identifier",
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"start":226,"end":227,"loc":{"start":{"line":7,"column":1},"end":{"line":7,"column":2},"identifierName":"a"},
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"name": "a"
|
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},
|
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"consequent": {
|
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"type": "ArrowFunctionExpression",
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"start":230,"end":242,"loc":{"start":{"line":7,"column":5},"end":{"line":7,"column":17}},
|
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"id": null,
|
||||
"generator": false,
|
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"async": false,
|
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"params": [
|
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{
|
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"type": "Identifier",
|
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"start":230,"end":231,"loc":{"start":{"line":7,"column":5},"end":{"line":7,"column":6},"identifierName":"b"},
|
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"name": "b"
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}
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],
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"body": {
|
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"type": "AssignmentExpression",
|
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"start":236,"end":241,"loc":{"start":{"line":7,"column":11},"end":{"line":7,"column":16}},
|
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"operator": "=",
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"left": {
|
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"type": "Identifier",
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"start":236,"end":237,"loc":{"start":{"line":7,"column":11},"end":{"line":7,"column":12},"identifierName":"c"},
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"name": "c"
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},
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"right": {
|
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"type": "Identifier",
|
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"start":240,"end":241,"loc":{"start":{"line":7,"column":15},"end":{"line":7,"column":16},"identifierName":"d"},
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"name": "d"
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},
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"extra": {
|
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"parenthesized": true,
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"parenStart": 235
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}
|
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}
|
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},
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"alternate": {
|
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"type": "ArrowFunctionExpression",
|
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"start":245,"end":251,"loc":{"start":{"line":7,"column":20},"end":{"line":7,"column":26}},
|
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"id": null,
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"generator": false,
|
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"async": false,
|
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"params": [
|
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{
|
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"type": "Identifier",
|
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"start":245,"end":246,"loc":{"start":{"line":7,"column":20},"end":{"line":7,"column":21},"identifierName":"e"},
|
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"name": "e"
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}
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],
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"body": {
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"type": "Identifier",
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"start":250,"end":251,"loc":{"start":{"line":7,"column":25},"end":{"line":7,"column":26},"identifierName":"f"},
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"name": "f"
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}
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},
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"extra": {
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"parenthesized": true,
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"parenStart": 225
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}
|
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"expression": {
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"test": {
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"name": "a"
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"consequent": {
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"id": null,
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"generator": false,
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"async": false,
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{
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"type": "Identifier",
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|
||||
"name": "b"
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}
|
||||
],
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"body": {
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{
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"left": {
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"name": "c"
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"name": "d"
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}
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}
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}
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|
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"name": "g"
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},
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"parenStart": 352
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"expression": {
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"test": {
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"name": "a"
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"consequent": {
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"start":426,"end":439,"loc":{"start":{"line":11,"column":5},"end":{"line":11,"column":18}},
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"name": "b"
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"operator": "+=",
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|
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"name": "c"
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},
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"type": "Identifier",
|
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|
||||
"name": "d"
|
||||
},
|
||||
"extra": {
|
||||
"parenthesized": true,
|
||||
"parenStart": 431
|
||||
}
|
||||
}
|
||||
},
|
||||
"alternate": {
|
||||
"type": "ArrowFunctionExpression",
|
||||
"start":442,"end":448,"loc":{"start":{"line":11,"column":21},"end":{"line":11,"column":27}},
|
||||
"id": null,
|
||||
"generator": false,
|
||||
"async": false,
|
||||
"params": [
|
||||
{
|
||||
"type": "Identifier",
|
||||
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|
||||
"name": "e"
|
||||
}
|
||||
],
|
||||
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|
||||
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|
||||
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|
||||
"name": "f"
|
||||
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|
||||
}
|
||||
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|
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"typeAnnotation": {
|
||||
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|
||||
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"typeAnnotation": {
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||||
"name": "g"
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||||
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}
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},
|
||||
"extra": {
|
||||
"parenthesized": true,
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"parenStart": 421
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"leadingComments": [
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||||
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"type": "CommentLine",
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}
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||||
]
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||||
}
|
||||
],
|
||||
"directives": []
|
||||
},
|
||||
"comments": [
|
||||
{
|
||||
"type": "CommentLine",
|
||||
"value": " a ? (b = c) : (d => e)",
|
||||
"start":24,"end":49,"loc":{"start":{"line":1,"column":24},"end":{"line":1,"column":49}}
|
||||
},
|
||||
{
|
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"type": "CommentLine",
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||||
"value": " a ? (b += c) : (d => e)",
|
||||
"start":75,"end":101,"loc":{"start":{"line":2,"column":25},"end":{"line":2,"column":51}}
|
||||
},
|
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{
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"type": "CommentLine",
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"value": " a ? ((b = c): d => e) : f",
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"start":131,"end":159,"loc":{"start":{"line":4,"column":28},"end":{"line":4,"column":56}}
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||||
{
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"type": "CommentLine",
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||||
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||||
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||||
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"type": "CommentLine",
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|
||||
},
|
||||
{
|
||||
"type": "CommentLine",
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||||
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||||
},
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||||
{
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||||
"type": "CommentLine",
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||||
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||||
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||||
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||||
{
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"type": "CommentLine",
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||||
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||||
}
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]
|
||||
}
|
||||
@ -1,8 +1,3 @@
|
||||
{
|
||||
"sourceType": "module",
|
||||
"plugins": [
|
||||
"jsx",
|
||||
"flow"
|
||||
],
|
||||
"throws": "Unexpected token (1:8)"
|
||||
}
|
||||
"throws": "Unexpected token (1:7)"
|
||||
}
|
||||
|
||||
@ -1,3 +1,3 @@
|
||||
{
|
||||
"throws": "Unexpected token (1:13)"
|
||||
"throws": "Unexpected token (1:12)"
|
||||
}
|
||||
|
||||
@ -1,3 +1,3 @@
|
||||
{
|
||||
"throws": "Unexpected token, expected \",\" (1:65)"
|
||||
"throws": "Unexpected token (1:65)"
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user