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cmd/compile: modify line number printing for nodes

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add preceding "+" for a line that is certainly a statement,
and "_" for a line this is certainly not a statement.

Change-Id: I831435dbc2302f25db1320b99d3513fe61fe1fa2
Reviewed-on: https://go-review.googlesource.com/c/go/+/198737
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
This commit is contained in:
David Chase 2019-10-03 12:15:14 -04:00
parent b8fe9f7970
commit c1b7f508b0
1 changed files with 9 additions and 1 deletions
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10
src/cmd/compile/internal/gc/fmt.go
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@ -6,6 +6,7 @@ package gc
import (
"cmd/compile/internal/types"
"cmd/internal/src"
"fmt"
"io"
"strconv"
@ -425,7 +426,14 @@ func (n *Node) jconv(s fmt.State, flag FmtFlag) {
}
if n.Pos.IsKnown() {
fmt.Fprintf(s, " l(%d)", n.Pos.Line())
pfx := ""
switch n.Pos.IsStmt() {
case src.PosNotStmt:
pfx = "_" // "-" would be confusing
case src.PosIsStmt:
pfx = "+"
}
fmt.Fprintf(s, " l(%s%d)", pfx, n.Pos.Line())
}
if c == 0 && n.Xoffset != BADWIDTH {