go.mod

@@ -4,7 +4,6 @@ go 1.24.0
 
 require (
 	github.com/dlclark/regexp2 v1.11.5
-	github.com/go-json-experiment/json v0.0.0-20250223041408-d3c622f1b874
 	github.com/google/go-cmp v0.7.0
 	github.com/pkg/diff v0.0.0-20241224192749-4e6772a4315c
 	golang.org/x/sys v0.31.0

go.sum

@@ -1,7 +1,5 @@
 github.com/dlclark/regexp2 v1.11.5 h1:Q/sSnsKerHeCkc/jSTNq1oCm7KiVgUMZRDUoRu0JQZQ=
 github.com/dlclark/regexp2 v1.11.5/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
-github.com/go-json-experiment/json v0.0.0-20250223041408-d3c622f1b874 h1:F8d1AJ6M9UQCavhwmO6ZsrYLfG8zVFWfEfMS2MXPkSY=
-github.com/go-json-experiment/json v0.0.0-20250223041408-d3c622f1b874/go.mod h1:TiCD2a1pcmjd7YnhGH0f/zKNcCD06B029pHhzV23c2M=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
 github.com/pkg/diff v0.0.0-20241224192749-4e6772a4315c h1:8TRxBMS/YsupXoOiGKHr9ZOXo+5DezGWPgBAhBHEHto=

internal/collections/ordered_map.go

@@ -11,9 +11,6 @@ import (
 	"reflect"
 	"slices"
 	"strconv"
-
-	json2 "github.com/go-json-experiment/json"
-	"github.com/go-json-experiment/json/jsontext"
 )
 
 // OrderedMap is an insertion ordered map.
@@ -244,10 +241,7 @@ func resolveKeyName(k reflect.Value) (string, error) {
 	panic("unexpected map key type")
 }
 
-var (
-	_ json.Unmarshaler      = (*OrderedMap[string, string])(nil)
-	_ json2.UnmarshalerFrom = (*OrderedMap[string, string])(nil)
-)
+var _ json.Unmarshaler = (*OrderedMap[string, string])(nil)
 
 func (m *OrderedMap[K, V]) UnmarshalJSON(data []byte) error {
 	if string(data) == "null" {
@@ -288,34 +282,3 @@ func (m *OrderedMap[K, V]) UnmarshalJSON(data []byte) error {
 	}
 	return nil
 }
-
-func (m *OrderedMap[K, V]) UnmarshalJSONFrom(dec *jsontext.Decoder) error {
-	token, err := dec.ReadToken()
-	if err != nil {
-		return err
-	}
-	if token.Kind() == 'n' { // jsontext.Null.Kind()
-		// By convention, to approximate the behavior of Unmarshal itself,
-		// Unmarshalers implement UnmarshalJSON([]byte("null")) as a no-op.
-		// https://pkg.go.dev/encoding/json#Unmarshaler
-		return nil
-	}
-	if token.Kind() != '{' { // jsontext.ObjectStart.Kind()
-		return errors.New("cannot unmarshal non-object JSON value into Map")
-	}
-	for dec.PeekKind() != '}' { // jsontext.ObjectEnd.Kind()
-		var key K
-		var value V
-		if err := json2.UnmarshalDecode(dec, &key); err != nil {
-			return err
-		}
-		if err := json2.UnmarshalDecode(dec, &value); err != nil {
-			return err
-		}
-		m.Set(key, value)
-	}
-	if _, err := dec.ReadToken(); err != nil {
-		return err
-	}
-	return nil
-}

internal/collections/ordered_map_test.go

@@ -6,7 +6,6 @@ import (
 	"slices"
 	"testing"
 
-	json2 "github.com/go-json-experiment/json"
 	"github.com/microsoft/typescript-go/internal/collections"
 	"gotest.tools/v3/assert"
 )
@@ -166,10 +165,6 @@ func TestOrderedMapUnmarshalJSON(t *testing.T) {
 		t.Parallel()
 		testOrderedMapUnmarshalJSON(t, json.Unmarshal)
 	})
-	t.Run("UnmarshalJSONV2", func(t *testing.T) {
-		t.Parallel()
-		testOrderedMapUnmarshalJSON(t, func(in []byte, out any) error { return json2.Unmarshal(in, out) })
-	})
 }
 
 func testOrderedMapUnmarshalJSON(t *testing.T, unmarshal func([]byte, any) error) {

internal/compiler/module/resolver.go

@@ -1504,8 +1504,9 @@ func (r *resolutionState) getPackageJsonInfo(packageDirectory string, onlyRecord
 	directoryExists := r.resolver.host.FS().DirectoryExists(packageDirectory)
 	if directoryExists && r.resolver.host.FS().FileExists(packageJsonPath) {
 		// Ignore error
-		contents, _ := r.resolver.host.FS().ReadFile(packageJsonPath)
-		packageJsonContent, _ := packagejson.Parse([]byte(contents))
+		// contents, _ := r.resolver.host.FS().ReadFile(packageJsonPath)
+		// packageJsonContent, _ := packagejson.Parse([]byte(contents))
+		var packageJsonContent packagejson.Fields
 		if r.resolver.traceEnabled() {
 			r.resolver.host.Trace(diagnostics.Found_package_json_at_0.Format(packageJsonPath))
 		}

internal/compiler/packagejson/exportsorimports.go

@@ -3,8 +3,6 @@ package packagejson
 import (
 	"encoding/json"
 
-	json2 "github.com/go-json-experiment/json"
-	"github.com/go-json-experiment/json/jsontext"
 	"github.com/microsoft/typescript-go/internal/collections"
 )
 
@@ -23,19 +21,12 @@ type ExportsOrImports struct {
 	objectKind objectKind
 }
 
-var (
-	_ json.Unmarshaler      = (*ExportsOrImports)(nil)
-	_ json2.UnmarshalerFrom = (*ExportsOrImports)(nil)
-)
+var _ json.Unmarshaler = (*ExportsOrImports)(nil)
 
 func (e *ExportsOrImports) UnmarshalJSON(data []byte) error {
 	return unmarshalJSONValue[ExportsOrImports](&e.JSONValue, data)
 }
 
-func (e *ExportsOrImports) UnmarshalJSONFrom(dec *jsontext.Decoder) error {
-	return unmarshalJSONValueV2[ExportsOrImports](&e.JSONValue, dec)
-}
-
 func (e ExportsOrImports) AsObject() *collections.OrderedMap[string, ExportsOrImports] {
 	if e.Type != JSONValueTypeObject {
 		panic("expected object")

internal/compiler/packagejson/exportsorimports_test.go

@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"testing"
 
-	json2 "github.com/go-json-experiment/json"
 	"github.com/microsoft/typescript-go/internal/compiler/packagejson"
 	"gotest.tools/v3/assert"
 )
@@ -16,10 +15,6 @@ func TestExports(t *testing.T) {
 		t.Parallel()
 		testExports(t, json.Unmarshal)
 	})
-	t.Run("UnmarshalJSONV2", func(t *testing.T) {
-		t.Parallel()
-		testExports(t, func(in []byte, out any) error { return json2.Unmarshal(in, out) })
-	})
 }
 
 func testExports(t *testing.T, unmarshal func([]byte, any) error) {

internal/compiler/packagejson/jsonvalue.go

@@ -4,8 +4,6 @@ import (
 	"encoding/json"
 	"fmt"
 
-	json2 "github.com/go-json-experiment/json"
-	"github.com/go-json-experiment/json/jsontext"
 	"github.com/microsoft/typescript-go/internal/collections"
 )
 
@@ -74,19 +72,12 @@ func (v JSONValue) AsArray() []JSONValue {
 	return v.Value.([]JSONValue)
 }
 
-var (
-	_ json.Unmarshaler      = (*JSONValue)(nil)
-	_ json2.UnmarshalerFrom = (*JSONValue)(nil)
-)
+var _ json.Unmarshaler = (*JSONValue)(nil)
 
 func (v *JSONValue) UnmarshalJSON(data []byte) error {
 	return unmarshalJSONValue[JSONValue](v, data)
 }
 
-func (v *JSONValue) UnmarshalJSONFrom(dec *jsontext.Decoder) error {
-	return unmarshalJSONValueV2[JSONValue](v, dec)
-}
-
 func unmarshalJSONValue[T any](v *JSONValue, data []byte) error {
 	if string(data) == "null" {
 		*v = JSONValue{Type: JSONValueTypeNull}
@@ -119,55 +110,3 @@ func unmarshalJSONValue[T any](v *JSONValue, data []byte) error {
 	}
 	return nil
 }
-
-func unmarshalJSONValueV2[T any](v *JSONValue, dec *jsontext.Decoder) error {
-	switch dec.PeekKind() {
-	case 'n': // jsontext.Null.Kind()
-		if _, err := dec.ReadToken(); err != nil {
-			return err
-		}
-		v.Value = nil
-		v.Type = JSONValueTypeNull
-		return nil
-	case '"':
-		v.Type = JSONValueTypeString
-		if err := json2.UnmarshalDecode(dec, &v.Value); err != nil {
-			return err
-		}
-	case '[':
-		if _, err := dec.ReadToken(); err != nil {
-			return err
-		}
-		var elements []T
-		for dec.PeekKind() != jsontext.EndArray.Kind() {
-			var element T
-			if err := json2.UnmarshalDecode(dec, &element); err != nil {
-				return err
-			}
-			elements = append(elements, element)
-		}
-		if _, err := dec.ReadToken(); err != nil {
-			return err
-		}
-		v.Type = JSONValueTypeArray
-		v.Value = elements
-	case '{':
-		var object collections.OrderedMap[string, T]
-		if err := json2.UnmarshalDecode(dec, &object); err != nil {
-			return err
-		}
-		v.Type = JSONValueTypeObject
-		v.Value = &object
-	case 't', 'f': // jsontext.True.Kind(), jsontext.False.Kind()
-		v.Type = JSONValueTypeBoolean
-		if err := json2.UnmarshalDecode(dec, &v.Value); err != nil {
-			return err
-		}
-	default:
-		v.Type = JSONValueTypeNumber
-		if err := json2.UnmarshalDecode(dec, &v.Value); err != nil {
-			return err
-		}
-	}
-	return nil
-}

internal/compiler/packagejson/jsonvalue_test.go

@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"testing"
 
-	json2 "github.com/go-json-experiment/json"
 	"github.com/microsoft/typescript-go/internal/compiler/packagejson"
 	"gotest.tools/v3/assert"
 )
@@ -16,10 +15,6 @@ func TestJSONValue(t *testing.T) {
 		t.Parallel()
 		testJSONValue(t, json.Unmarshal)
 	})
-	t.Run("UnmarshalJSONV2", func(t *testing.T) {
-		t.Parallel()
-		testJSONValue(t, func(in []byte, out any) error { return json2.Unmarshal(in, out) })
-	})
 }
 
 func testJSONValue(t *testing.T, unmarshal func([]byte, any) error) {

internal/compiler/packagejson/packagejson.go

@@ -1,8 +1,6 @@
 package packagejson
 
-import (
-	json2 "github.com/go-json-experiment/json"
-)
+import "encoding/json"
 
 type HeaderFields struct {
 	Name    Expected[string] `json:"name"`
@@ -34,7 +32,7 @@ type Fields struct {
 
 func Parse(data []byte) (Fields, error) {
 	var f Fields
-	if err := json2.Unmarshal(data, &f); err != nil {
+	if err := json.Unmarshal(data, &f); err != nil {
 		return f, err
 	}
 	return f, nil

internal/compiler/packagejson/packagejson_test.go

@@ -5,7 +5,6 @@ import (
 	"path/filepath"
 	"testing"
 
-	json2 "github.com/go-json-experiment/json"
 	"github.com/microsoft/typescript-go/internal/compiler/packagejson"
 	"github.com/microsoft/typescript-go/internal/parser"
 	"github.com/microsoft/typescript-go/internal/repo"
@@ -33,17 +32,6 @@ func BenchmarkPackageJSON(b *testing.B) {
 			})
 		})
 
-		b.Run("UnmarshalJSONV2", func(b *testing.B) {
-			b.Run(f.Name(), func(b *testing.B) {
-				for b.Loop() {
-					var p packagejson.Fields
-					if err := json2.Unmarshal(content, &p); err != nil {
-						b.Fatal(err)
-					}
-				}
-			})
-		})
-
 		b.Run("ParseJSONText", func(b *testing.B) {
 			b.Run(f.Name(), func(b *testing.B) {
 				fileName := "/" + f.Name()

internal/jsnum/string.go

@@ -1,7 +1,6 @@
 package jsnum
 
 import (
-	"encoding/json"
 	"errors"
 	"math"
 	"math/big"
@@ -32,9 +31,11 @@ func (n Number) String() string {
 		}
 	}
 
+	return strconv.FormatFloat(float64(n), 'g', -1, 64)
+
 	// Otherwise, the Go json package handles this correctly.
-	b, _ := json.Marshal(float64(n)) //nolint:errchkjson
-	return string(b)
+	// b, _ := json.Marshal(float64(n)) //nolint:errchkjson
+	// return string(b)
 }
 
 // https://tc39.es/ecma262/2024/multipage/abstract-operations.html#sec-stringtonumber