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|
package yaml
import (
"errors"
"fmt"
)
// Error is an error implementation used to report errors that correspond to
// a particular position in an input buffer.
type Error struct {
cause error
Line, Column int
}
func (e Error) Error() string {
return fmt.Sprintf("on line %d, column %d: %s", e.Line, e.Column, e.cause.Error())
}
// Cause is an implementation of the interface used by
// github.com/pkg/errors.Cause, returning the underlying error without the
// position information.
func (e Error) Cause() error {
return e.cause
}
// WrappedErrors is an implementation of github.com/hashicorp/errwrap.Wrapper
// returning the underlying error without the position information.
func (e Error) WrappedErrors() []error {
return []error{e.cause}
}
func parserError(p *yaml_parser_t) error {
var cause error
if len(p.problem) > 0 {
cause = errors.New(p.problem)
} else {
cause = errors.New("invalid YAML syntax") // useless generic error, then
}
return parserErrorWrap(p, cause)
}
func parserErrorWrap(p *yaml_parser_t, cause error) error {
switch {
case p.problem_mark.line != 0:
line := p.problem_mark.line
column := p.problem_mark.column
// Scanner errors don't iterate line before returning error
if p.error == yaml_SCANNER_ERROR {
line++
column = 0
}
return Error{
cause: cause,
Line: line,
Column: column + 1,
}
case p.context_mark.line != 0:
return Error{
cause: cause,
Line: p.context_mark.line,
Column: p.context_mark.column + 1,
}
default:
return cause
}
}
func parserErrorf(p *yaml_parser_t, f string, vals ...interface{}) error {
return parserErrorWrap(p, fmt.Errorf(f, vals...))
}
func parseEventErrorWrap(evt *yaml_event_t, cause error) error {
if evt.start_mark.line == 0 {
// Event does not have a start mark, so we won't wrap the error at all
return cause
}
return Error{
cause: cause,
Line: evt.start_mark.line,
Column: evt.start_mark.column + 1,
}
}
func parseEventErrorf(evt *yaml_event_t, f string, vals ...interface{}) error {
return parseEventErrorWrap(evt, fmt.Errorf(f, vals...))
}
func emitterError(e *yaml_emitter_t) error {
var cause error
if len(e.problem) > 0 {
cause = errors.New(e.problem)
} else {
cause = errors.New("failed to write YAML token") // useless generic error, then
}
return cause
}
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