diff options
| -rw-r--r-- | src/cmd/compile/internal/gc/lex.go | 7 | ||||
| -rw-r--r-- | test/fixedbugs/issue9036.go | 29 |
2 files changed, 35 insertions, 1 deletions
diff --git a/src/cmd/compile/internal/gc/lex.go b/src/cmd/compile/internal/gc/lex.go index d9ba9b210b..cf41c40964 100644 --- a/src/cmd/compile/internal/gc/lex.go +++ b/src/cmd/compile/internal/gc/lex.go @@ -1434,6 +1434,11 @@ casedot: } caseep: + if importpkg == nil && (c == 'p' || c == 'P') { + // <mantissa>p<base-2-exponent> is allowed in .a/.o imports, + // but not in .go sources. See #9036. + Yyerror("malformed floating point constant") + } cp.WriteByte(byte(c)) c = getc() if c == '+' || c == '-' { @@ -1442,7 +1447,7 @@ caseep: } if !yy_isdigit(c) { - Yyerror("malformed fp constant exponent") + Yyerror("malformed floating point constant exponent") } for yy_isdigit(c) { cp.WriteByte(byte(c)) diff --git a/test/fixedbugs/issue9036.go b/test/fixedbugs/issue9036.go new file mode 100644 index 0000000000..283159e74a --- /dev/null +++ b/test/fixedbugs/issue9036.go @@ -0,0 +1,29 @@ +// 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) + x4 = 0x1p10 // ERROR "malformed floating point constant" + x5 = 1p10 // ERROR "malformed floating point constant" + x6 = 0p0 // ERROR "malformed floating point constant" +) + +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) +} |