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go/misc/cgo/errors/test.bash
Robert Griesemer 2a5cf48f91 cmd/compile: print columns (not just lines) in error messages
Compiler errors now show the exact line and line byte offset (sometimes
called "column") of where an error occured. For `go tool compile x.go`:

	package p
	const c int = false
	//line foo.go:123
	type t intg

reports

	x.go:2:7: cannot convert false to type int
	foo.go:123[x.go:4:8]: undefined: intg

(Some errors use the "wrong" position for the error message; arguably
the byte offset for the first error should be 15, the position of 'false',
rathen than 7, the position of 'c'. But that is an indepedent issue.)

The byte offset (column) values are measured in bytes; they start at 1,
matching the convention used by editors and IDEs.

Positions modified by //line directives show the line offset only for the
actual source location (in square brackets), not for the "virtual" file and
line number because that code is likely generated and the //line directive
only provides line information.

Because the new format might break existing tools or scripts, printing
of line offsets can be disabled with the new compiler flag -C. We plan
to remove this flag eventually.

Fixes #10324.

Change-Id: I493f5ee6e78457cf7b00025aba6b6e28e50bb740
Reviewed-on: https://go-review.googlesource.com/37970
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
2017-03-09 23:29:49 +00:00

74 lines
1.6 KiB
Bash
Executable File

#!/usr/bin/env bash
# Copyright 2013 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.
check() {
file=$1
line=$(grep -n 'ERROR HERE' $file | sed 's/:.*//')
if [ "$line" = "" ]; then
echo 1>&2 misc/cgo/errors/test.bash: BUG: cannot find ERROR HERE in $file
exit 1
fi
expect $file $file:$line:
}
expect() {
file=$1
shift
if go build -gcflags=-C $file >errs 2>&1; then
echo 1>&2 misc/cgo/errors/test.bash: BUG: expected cgo to fail on $file but it succeeded
exit 1
fi
if ! test -s errs; then
echo 1>&2 misc/cgo/errors/test.bash: BUG: expected error output for $file but saw none
exit 1
fi
for error; do
if ! fgrep $error errs >/dev/null 2>&1; then
echo 1>&2 misc/cgo/errors/test.bash: BUG: expected error output for $file to contain \"$error\" but saw:
cat 1>&2 errs
exit 1
fi
done
}
check err1.go
check err2.go
check err3.go
check issue7757.go
check issue8442.go
check issue11097a.go
check issue11097b.go
expect issue13129.go C.ushort
check issue13423.go
expect issue13635.go C.uchar C.schar C.ushort C.uint C.ulong C.longlong C.ulonglong C.complexfloat C.complexdouble
check issue13830.go
check issue16116.go
check issue16591.go
if ! go build issue14669.go; then
exit 1
fi
if ! CGO_CFLAGS="-O" go build issue14669.go; then
exit 1
fi
if ! go run ptr.go; then
exit 1
fi
# The malloc.go test should crash.
rm -f malloc.out
if go run malloc.go >malloc.out 2>&1; then
echo '`go run malloc.go` succeeded unexpectedly'
cat malloc.out
rm -f malloc.out
exit 1
fi
rm -f malloc.out
rm -rf errs _obj
exit 0