"bytes"
"cmd/compile/internal/syntax"
"fmt"
+ . "internal/types/errors"
+ "runtime"
"strconv"
"strings"
)
-func unimplemented() {
- panic("unimplemented")
-}
-
func assert(p bool) {
if !p {
- panic("assertion failed")
+ msg := "assertion failed"
+ // Include information about the assertion location. Due to panic recovery,
+ // this location is otherwise buried in the middle of the panicking stack.
+ if _, file, line, ok := runtime.Caller(1); ok {
+ msg = fmt.Sprintf("%s:%d: %s", file, line, msg)
+ }
+ panic(msg)
}
}
// To report an error_, call Checker.report.
type error_ struct {
desc []errorDesc
+ code Code
soft bool // TODO(gri) eventually determine this from an error code
}
if err.empty() {
return "no error"
}
- var buf bytes.Buffer
+ var buf strings.Builder
for i := range err.desc {
p := &err.desc[i]
if i > 0 {
- fmt.Fprintf(&buf, "\n\t%s: ", p.pos)
+ fmt.Fprint(&buf, "\n\t")
+ if p.pos.IsKnown() {
+ fmt.Fprintf(&buf, "%s: ", p.pos)
+ }
}
- buf.WriteString(sprintf(qf, p.format, p.args...))
+ buf.WriteString(sprintf(qf, false, p.format, p.args...))
}
return buf.String()
}
// errorf adds formatted error information to err.
// It may be called multiple times to provide additional information.
func (err *error_) errorf(at poser, format string, args ...interface{}) {
- err.desc = append(err.desc, errorDesc{posFor(at), format, args})
+ err.desc = append(err.desc, errorDesc{atPos(at), format, args})
}
-func sprintf(qf Qualifier, format string, args ...interface{}) string {
+func sprintf(qf Qualifier, tpSubscripts bool, format string, args ...interface{}) string {
for i, arg := range args {
switch a := arg.(type) {
case nil:
arg = a.String()
case syntax.Expr:
arg = syntax.String(a)
+ case []syntax.Expr:
+ var buf strings.Builder
+ buf.WriteByte('[')
+ for i, x := range a {
+ if i > 0 {
+ buf.WriteString(", ")
+ }
+ buf.WriteString(syntax.String(x))
+ }
+ buf.WriteByte(']')
+ arg = buf.String()
case Object:
arg = ObjectString(a, qf)
case Type:
- arg = TypeString(a, qf)
+ var buf bytes.Buffer
+ w := newTypeWriter(&buf, qf)
+ w.tpSubscripts = tpSubscripts
+ w.typ(a)
+ arg = buf.String()
+ case []Type:
+ var buf bytes.Buffer
+ w := newTypeWriter(&buf, qf)
+ w.tpSubscripts = tpSubscripts
+ buf.WriteByte('[')
+ for i, x := range a {
+ if i > 0 {
+ buf.WriteString(", ")
+ }
+ w.typ(x)
+ }
+ buf.WriteByte(']')
+ arg = buf.String()
+ case []*TypeParam:
+ var buf bytes.Buffer
+ w := newTypeWriter(&buf, qf)
+ w.tpSubscripts = tpSubscripts
+ buf.WriteByte('[')
+ for i, x := range a {
+ if i > 0 {
+ buf.WriteString(", ")
+ }
+ w.typ(x)
+ }
+ buf.WriteByte(']')
+ arg = buf.String()
}
args[i] = arg
}
}
}
+// check may be nil.
func (check *Checker) sprintf(format string, args ...interface{}) string {
- return sprintf(check.qualifier, format, args...)
+ var qf Qualifier
+ if check != nil {
+ qf = check.qualifier
+ }
+ return sprintf(qf, false, format, args...)
}
func (check *Checker) report(err *error_) {
if err.empty() {
panic("no error to report")
}
- check.err(err.pos(), err.msg(check.qualifier), err.soft)
+ check.err(err.pos(), err.code, err.msg(check.qualifier), err.soft)
}
func (check *Checker) trace(pos syntax.Pos, format string, args ...interface{}) {
fmt.Printf("%s:\t%s%s\n",
pos,
strings.Repeat(". ", check.indent),
- check.sprintf(format, args...),
+ sprintf(check.qualifier, true, format, args...),
)
}
// dump is only needed for debugging
func (check *Checker) dump(format string, args ...interface{}) {
- fmt.Println(check.sprintf(format, args...))
+ fmt.Println(sprintf(check.qualifier, true, format, args...))
}
-func (check *Checker) err(at poser, msg string, soft bool) {
+func (check *Checker) err(at poser, code Code, msg string, soft bool) {
+ switch code {
+ case InvalidSyntaxTree:
+ msg = "invalid syntax tree: " + msg
+ case 0:
+ panic("no error code provided")
+ }
+
// Cheap trick: Don't report errors with messages containing
// "invalid operand" or "invalid type" as those tend to be
// follow-on errors which don't add useful information. Only
return
}
- pos := posFor(at)
+ pos := atPos(at)
// If we are encountering an error while evaluating an inherited
// constant initialization expression, pos is the position of in
pos = check.errpos
}
- err := Error{pos, stripAnnotations(msg), msg, soft}
+ // If we have a URL for error codes, add a link to the first line.
+ if code != 0 && check.conf.ErrorURL != "" {
+ u := fmt.Sprintf(check.conf.ErrorURL, code)
+ if i := strings.Index(msg, "\n"); i >= 0 {
+ msg = msg[:i] + u + msg[i:]
+ } else {
+ msg += u
+ }
+ }
+
+ err := Error{pos, stripAnnotations(msg), msg, soft, code}
if check.firstErr == nil {
check.firstErr = err
}
}
const (
- invalidAST = "invalid AST: "
invalidArg = "invalid argument: "
invalidOp = "invalid operation: "
)
Pos() syntax.Pos
}
-func (check *Checker) error(at poser, msg string) {
- check.err(at, msg, false)
+func (check *Checker) error(at poser, code Code, msg string) {
+ check.err(at, code, msg, false)
+}
+
+func (check *Checker) errorf(at poser, code Code, format string, args ...interface{}) {
+ check.err(at, code, check.sprintf(format, args...), false)
}
-func (check *Checker) errorf(at poser, format string, args ...interface{}) {
- check.err(at, check.sprintf(format, args...), false)
+func (check *Checker) softErrorf(at poser, code Code, format string, args ...interface{}) {
+ check.err(at, code, check.sprintf(format, args...), true)
}
-func (check *Checker) softErrorf(at poser, format string, args ...interface{}) {
- check.err(at, check.sprintf(format, args...), true)
+func (check *Checker) versionErrorf(at poser, v goVersion, format string, args ...interface{}) {
+ msg := check.sprintf(format, args...)
+ msg = fmt.Sprintf("%s requires %s or later", msg, v)
+ check.err(at, UnsupportedFeature, msg, true)
}
-// posFor reports the left (= start) position of at.
-func posFor(at poser) syntax.Pos {
+// atPos reports the left (= start) position of at.
+func atPos(at poser) syntax.Pos {
switch x := at.(type) {
case *operand:
if x.expr != nil {
// stripAnnotations removes internal (type) annotations from s.
func stripAnnotations(s string) string {
- // Would like to use strings.Builder but it's not available in Go 1.4.
- var b bytes.Buffer
+ var buf strings.Builder
for _, r := range s {
// strip #'s and subscript digits
- if r != instanceMarker && !('₀' <= r && r < '₀'+10) { // '₀' == U+2080
- b.WriteRune(r)
+ if r < '₀' || '₀'+10 <= r { // '₀' == U+2080
+ buf.WriteRune(r)
}
}
- if b.Len() < len(s) {
- return b.String()
+ if buf.Len() < len(s) {
+ return buf.String()
}
return s
}