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package source
import "fmt"
// FilePos represents a position information in the file.
type FilePos struct {
Filename string // filename, if any
Offset int // offset, starting at 0
Line int // line number, starting at 1
Column int // column number, starting at 1 (byte count)
}
// IsValid returns true if the position is valid.
func (p FilePos) IsValid() bool {
return p.Line > 0
}
// String returns a string in one of several forms:
//
// file:line:column valid position with file name
// file:line valid position with file name but no column (column == 0)
// line:column valid position without file name
// line valid position without file name and no column (column == 0)
// file invalid position with file name
// - invalid position without file name
//
func (p FilePos) String() string {
s := p.Filename
if p.IsValid() {
if s != "" {
s += ":"
}
s += fmt.Sprintf("%d", p.Line)
if p.Column != 0 {
s += fmt.Sprintf(":%d", p.Column)
}
}
if s == "" {
s = "-"
}
return s
}
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