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go/test/fixedbugs/issue9036.go
Robert Griesemer ed1a5e5da6 cmd/compile: cleanup number lexing
Change-Id: Ib0dd458d4ab1c58a2baf36491e288ac32e2ff99e
Reviewed-on: https://go-review.googlesource.com/19962
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-02-29 19:00:10 +00:00

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Go

// errorcheck
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Expects to see error messages on 'p' exponents.
package main
import "fmt"
const (
x1 = 1.1 // float
x2 = 1e10 // float
x3 = 0x1e10 // integer (e is a hex digit)
)
// 'p' exponents are invalid - the 'p' is not considered
// part of a floating-point number, but introduces a new
// (unexpected) name.
//
// Error recovery is not ideal and we use a new declaration
// each time for the parser to recover.
const x4 = 0x1p10 // ERROR "unexpected p10"
const x5 = 1p10 // ERROR "unexpected p10"
const x6 = 0p0 // ERROR "unexpected p0"
func main() {
fmt.Printf("%g %T\n", x1, x1)
fmt.Printf("%g %T\n", x2, x2)
fmt.Printf("%g %T\n", x3, x3)
fmt.Printf("%g %T\n", x4, x4)
fmt.Printf("%g %T\n", x5, x5)
fmt.Printf("%g %T\n", x6, x6)
}