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7f293f66b3
Allow the use of declarations whose names start with $ in all modes. However, normal code cannot define new entities with names that start with $: only the implementation can do that, e.g., for property delegates.
72 lines
2.5 KiB
Swift
72 lines
2.5 KiB
Swift
// RUN: %target-typecheck-verify-swift -swift-version 4
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// SR-1661: Dollar was accidentally allowed as an identifier in Swift 3.
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// SE-0144: Reject this behavior in the future.
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func dollarVar() {
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var $ : Int = 42 // expected-error {{'$' is not an identifier; use backticks to escape it}} {{7-8=`$`}}
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$ += 1 // expected-error {{'$' is not an identifier; use backticks to escape it}} {{3-4=`$`}}
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print($) // expected-error {{'$' is not an identifier; use backticks to escape it}} {{9-10=`$`}}
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}
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func dollarLet() {
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let $ = 42 // expected-error {{'$' is not an identifier; use backticks to escape it}} {{7-8=`$`}}
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print($) // expected-error {{'$' is not an identifier; use backticks to escape it}} {{9-10=`$`}}
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}
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func dollarClass() {
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class $ {} // expected-error {{'$' is not an identifier; use backticks to escape it}} {{9-10=`$`}}
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}
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func dollarEnum() {
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enum $ {} // expected-error {{'$' is not an identifier; use backticks to escape it}} {{8-9=`$`}}
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}
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func dollarStruct() {
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struct $ {} // expected-error {{'$' is not an identifier; use backticks to escape it}} {{10-11=`$`}}
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}
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func dollarFunc() {
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func $($ dollarParam: Int) {}
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// expected-error@-1 {{'$' is not an identifier; use backticks to escape it}} {{8-9=`$`}}
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// expected-error@-2 {{'$' is not an identifier; use backticks to escape it}} {{10-11=`$`}}
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$($: 24)
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// expected-error@-1 {{'$' is not an identifier; use backticks to escape it}} {{3-4=`$`}}
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// expected-error@-2 {{'$' is not an identifier; use backticks to escape it}} {{5-6=`$`}}
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}
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func escapedDollarVar() {
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var `$` : Int = 42 // no error
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`$` += 1
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print(`$`)
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}
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func escapedDollarLet() {
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let `$` = 42 // no error
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print(`$`)
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}
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func escapedDollarClass() {
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class `$` {} // no error
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}
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func escapedDollarEnum() {
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enum `$` {} // no error
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}
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func escapedDollarStruct() {
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struct `$` {} // no error
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}
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func escapedDollarFunc() {
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func `$`(`$`: Int) {} // no error
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`$`(`$`: 25) // no error
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}
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func escapedDollarAnd() {
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// FIXME: Bad diagnostics.
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`$0` = 1 // expected-error {{expected expression}}
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`$$` = 2
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`$abc` = 3
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}
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func $declareWithDollar() { // expected-error{{cannot declare entity '$declareWithDollar' with a '$' prefix}}
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var $foo = 17 // expected-error{{cannot declare entity '$foo' with a '$' prefix}}
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func $bar() { } // expected-error{{cannot declare entity '$bar' with a '$' prefix}}
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func wibble(
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$a: Int, // expected-error{{cannot declare entity '$a' with a '$' prefix}}
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$b c: Int) { } // expected-error{{cannot declare entity '$b' with a '$' prefix}}
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}
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