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[Flow] Function predicate declaration #103
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a411e1e
[Flow] Function predicate declaration
panagosg7 502b996
[Flow] Minor tweaks and more examples to function predicates
panagosg7 d5782a9
[Flow] Porting master changes on function predicates
panagosg7 7c81009
[Flow] Clean-up and better message for function predicates
panagosg7 f972e80
[Flow] Adding abstract function predicate example
panagosg7 e42d60c
[Flow] Rearranging the `predicate` field to ease babel generator.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| declare function foo(x: mixed): boolean %checks(x !== null); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,226 @@ | ||
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| }, | ||
| "identifierName": "foo" | ||
| }, | ||
| "name": "foo", | ||
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| "typeAnnotation": { | ||
| "type": "FunctionTypeAnnotation", | ||
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| } | ||
| }, | ||
| "typeParameters": null, | ||
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| { | ||
| "type": "FunctionTypeParam", | ||
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| }, | ||
| "identifierName": "x" | ||
| }, | ||
| "name": "x" | ||
| }, | ||
| "optional": false, | ||
| "typeAnnotation": { | ||
| "type": "MixedTypeAnnotation", | ||
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| "type": "BooleanTypeAnnotation", | ||
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| } | ||
| } | ||
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| }, | ||
| "predicate": { | ||
| "type": "DeclaredPredicate", | ||
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| } | ||
| }, | ||
| "expression": { | ||
| "type": "BinaryExpression", | ||
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| }, | ||
| "identifierName": "x" | ||
| }, | ||
| "name": "x" | ||
| }, | ||
| "operator": "!==", | ||
| "right": { | ||
| "type": "NullLiteral", | ||
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| "directives": [] | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| var f = (x: mixed): %checks => typeof x === "string"; |
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this.state.inTypeseems to be only necessary forthis.flowParseType(), so maybe we could just do this two lines in the else branch? Then the reset only has to happen there either.There was a problem hiding this comment.
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It looks like
this.state.inTypeneeds to betrueforthis.expect(tt.colon)to succeed (I tried to move it further down, but other tests failed). So,oldInTypeneeds to be recorded in the beginning in order to be restored beforethis.flowParsePredicate()is called (note thatflowParsePredicatepossibly parses expressions).Bottom line is I wasn't able to perform the optimization you suggested.