20 lines
381 B
JavaScript
20 lines
381 B
JavaScript
/* @flow */
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function x0(y: string): number {
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return +y; // ok, + exists solely for coercion
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}
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function x1(y: string): number {
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return -y; // error, we don't allow coercion here
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}
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function x3(y: string) {
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return ~y; // error, we don't allow coercion here
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}
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function x4(y: string): boolean {
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return !y; // ok, coercion is allowed
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}
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(-1: void); // error, number ~> void
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