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Creates LexerError type

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- Creates LexerError type for all possible parse errors generated by the
  Lexer, except for standard JSON library errors or through AddError
  method;
- Updates .gitignore to exclude JetBrain family directories and files.
This commit is contained in:
Steve Jiang
2016-05-26 19:17:52 -07:00
parent 12a3bdbeb6
commit 0ba5b87db7
3 changed files with 153 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files
.gitignore
+2
View File
@@ -1,2 +1,4 @@
.root
*_easyjson.go
*.iml
.idea
jlexer/error.go
+15
View File
@@ -0,0 +1,15 @@
package jlexer
import "fmt"
// LexerError implements the error interface and represents all possible errors that can be
// generated during parsing the JSON data.
type LexerError struct {
Reason string
Offset int
Data string
}
func (l *LexerError) Error() string {
return fmt.Sprintf("parse error: %s near offset %d of '%s'", l.Reason, l.Offset, l.Data)
}
jlexer/lexer.go
+136 -38
View File
@@ -396,7 +396,11 @@ func (r *Lexer) errParse(what string) {
} else {
str = string(r.Data[r.pos:r.pos+maxErrorContextLen-3]) + "..."
}
r.err = fmt.Errorf("parse error: %s at byte %d, near '%s'.", what, r.pos, str)
r.err = &LexerError{
Reason: what,
Offset: r.pos,
Data: str,
}
}
}
@@ -412,7 +416,11 @@ func (r *Lexer) errInvalidToken(expected string) {
} else {
str = string(r.token.byteValue[:maxErrorContextLen-3]) + "..."
}
r.err = fmt.Errorf("parse error: expected %s, got '%s' at byte %d.", expected, str, r.start)
r.err = &LexerError{
Reason: fmt.Sprintf("expected %s", expected),
Offset: r.pos,
Data: str,
}
}
}
@@ -586,8 +594,13 @@ func (r *Lexer) Uint8() uint8 {
if !r.Ok() {
return 0
}
var n uint64
n, r.err = strconv.ParseUint(s, 10, 8)
n, err := strconv.ParseUint(s, 10, 8)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return uint8(n)
}
@@ -596,8 +609,13 @@ func (r *Lexer) Uint16() uint16 {
if !r.Ok() {
return 0
}
var n uint64
n, r.err = strconv.ParseUint(s, 10, 16)
n, err := strconv.ParseUint(s, 10, 16)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return uint16(n)
}
@@ -606,8 +624,13 @@ func (r *Lexer) Uint32() uint32 {
if !r.Ok() {
return 0
}
var n uint64
n, r.err = strconv.ParseUint(s, 10, 32)
n, err := strconv.ParseUint(s, 10, 32)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return uint32(n)
}
@@ -616,8 +639,13 @@ func (r *Lexer) Uint64() uint64 {
if !r.Ok() {
return 0
}
var n uint64
n, r.err = strconv.ParseUint(s, 10, 64)
n, err := strconv.ParseUint(s, 10, 64)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return n
}
@@ -630,8 +658,13 @@ func (r *Lexer) Int8() int8 {
if !r.Ok() {
return 0
}
var n int64
n, r.err = strconv.ParseInt(s, 10, 8)
n, err := strconv.ParseInt(s, 10, 8)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return int8(n)
}
@@ -640,8 +673,13 @@ func (r *Lexer) Int16() int16 {
if !r.Ok() {
return 0
}
var n int64
n, r.err = strconv.ParseInt(s, 10, 16)
n, err := strconv.ParseInt(s, 10, 16)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return int16(n)
}
@@ -650,8 +688,13 @@ func (r *Lexer) Int32() int32 {
if !r.Ok() {
return 0
}
var n int64
n, r.err = strconv.ParseInt(s, 10, 32)
n, err := strconv.ParseInt(s, 10, 32)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return int32(n)
}
@@ -660,8 +703,13 @@ func (r *Lexer) Int64() int64 {
if !r.Ok() {
return 0
}
var n int64
n, r.err = strconv.ParseInt(s, 10, 64)
n, err := strconv.ParseInt(s, 10, 64)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return n
}
@@ -674,8 +722,13 @@ func (r *Lexer) Uint8Str() uint8 {
if !r.Ok() {
return 0
}
var n uint64
n, r.err = strconv.ParseUint(s, 10, 8)
n, err := strconv.ParseUint(s, 10, 8)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return uint8(n)
}
@@ -684,8 +737,13 @@ func (r *Lexer) Uint16Str() uint16 {
if !r.Ok() {
return 0
}
var n uint64
n, r.err = strconv.ParseUint(s, 10, 16)
n, err := strconv.ParseUint(s, 10, 16)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return uint16(n)
}
@@ -694,8 +752,13 @@ func (r *Lexer) Uint32Str() uint32 {
if !r.Ok() {
return 0
}
var n uint64
n, r.err = strconv.ParseUint(s, 10, 32)
n, err := strconv.ParseUint(s, 10, 32)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return uint32(n)
}
@@ -704,8 +767,13 @@ func (r *Lexer) Uint64Str() uint64 {
if !r.Ok() {
return 0
}
var n uint64
n, r.err = strconv.ParseUint(s, 10, 64)
n, err := strconv.ParseUint(s, 10, 64)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return n
}
@@ -718,8 +786,13 @@ func (r *Lexer) Int8Str() int8 {
if !r.Ok() {
return 0
}
var n int64
n, r.err = strconv.ParseInt(s, 10, 8)
n, err := strconv.ParseInt(s, 10, 8)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return int8(n)
}
@@ -728,8 +801,13 @@ func (r *Lexer) Int16Str() int16 {
if !r.Ok() {
return 0
}
var n int64
n, r.err = strconv.ParseInt(s, 10, 16)
n, err := strconv.ParseInt(s, 10, 16)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return int16(n)
}
@@ -738,8 +816,13 @@ func (r *Lexer) Int32Str() int32 {
if !r.Ok() {
return 0
}
var n int64
n, r.err = strconv.ParseInt(s, 10, 32)
n, err := strconv.ParseInt(s, 10, 32)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return int32(n)
}
@@ -748,8 +831,13 @@ func (r *Lexer) Int64Str() int64 {
if !r.Ok() {
return 0
}
var n int64
n, r.err = strconv.ParseInt(s, 10, 64)
n, err := strconv.ParseInt(s, 10, 64)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return n
}
@@ -762,8 +850,13 @@ func (r *Lexer) Float32() float32 {
if !r.Ok() {
return 0
}
var n float64
n, r.err = strconv.ParseFloat(s, 32)
n, err := strconv.ParseFloat(s, 32)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return float32(n)
}
@@ -772,8 +865,13 @@ func (r *Lexer) Float64() float64 {
if !r.Ok() {
return 0
}
var n float64
n, r.err = strconv.ParseFloat(s, 64)
n, err := strconv.ParseFloat(s, 64)
if err != nil {
r.err = &LexerError{
Reason: err.Error(),
}
}
return n
}