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Disallow ._ in float literal.
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@ -754,9 +754,7 @@ impl<'a> StringReader<'a> {
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// integer literal followed by field/method access or a range pattern
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// (`0..2` and `12.foo()`)
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if self.ch_is('.') && !self.nextch_is('.') &&
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!self.nextch()
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.unwrap_or('\0')
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.is_xid_start() {
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!ident_start(self.nextch()) {
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// might have stuff after the ., and if it does, it needs to start
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// with a number
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self.bump();
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13
src/test/parse-fail/underscore-suffix-for-float.rs
Normal file
13
src/test/parse-fail/underscore-suffix-for-float.rs
Normal file
@ -0,0 +1,13 @@
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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fn main() {
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let a = 42._; //~ ERROR unexpected token: `_`
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}
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19
src/test/run-pass/underscore-method-after-integer.rs
Normal file
19
src/test/run-pass/underscore-method-after-integer.rs
Normal file
@ -0,0 +1,19 @@
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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trait Tr : Sized {
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fn _method_on_numbers(self) {}
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}
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impl Tr for i32 {}
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fn main() {
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42._method_on_numbers();
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}
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