go-gohugoio-hugo-good-example-of-small-but-complex-change

This mapping has 2 multi-map groups: several pairings are equally correct there. The code view shows one arbitrary valid pairing, not the only one.

A painting is a person's account of this edit as text, recorded independently of the node mapping - a rendering often has several equally defensible answers where the mapping has one. Deletions and insertions carry no position on the opposite side in a painting, so that panel draws no caret for them.

Before…lines 1–309 unchanged (309 lines)
// a struct or its pointer. If obj is a struct,
// to check all T and *T method, use obj pointer type Value
objPtr := obj
if !hreflect.IsInterfaceOrPointer(objPtr.Kind()) && objPtr.CanAddr() {
objPtr = objPtr.Addr()
}
316
index := hreflect.GetMethodIndexByName(objPtr.Type(), elemName)
if index != -1 {
var args []reflect.Value
mt := objPtr.Type().Method(index)
num := mt.Type.NumIn()
maxNumIn := 1
if num > 1 && hreflect.IsContextType(mt.Type.In(1)) {
	args = []reflect.Value{ctx}
	maxNumIn = 2
}
327
switch {
case mt.PkgPath != "":
	return zero, fmt.Errorf("%s is an unexported method of type %s", elemName, typ)
…lines 331–335 unchanged (5 lines)
	return zero, fmt.Errorf("%s is a method of type %s but returns more than 2 outputs", elemName, typ)
case mt.Type.NumOut() == 1 && mt.Type.Out(0).Implements(errorType):
	return zero, fmt.Errorf("%s is a method of type %s but only returns an error type", elemName, typ)
case mt.Type.NumOut() == 2 && !mt.Type.Out(1).Implements(errorType):
	return zero, fmt.Errorf("%s is a method of type %s returning two values but the second value is not an error type", elemName, typ)
}
res := objPtr.Method(mt.Index).Call(args)
if len(res) == 2 && !res[1].IsNil() {
	return zero, fmt.Errorf("error at calling a method %s of type %s: %s", elemName, typ, res[1].Interface().(error))
}
return res[0], nil
}
348
…lines 349–498 unchanged (150 lines)

After…lines 1–309 unchanged (309 lines)
// a struct or its pointer. If obj is a struct,
// to check all T and *T method, use obj pointer type Value
objPtr := obj
if !hreflect.IsInterfaceOrPointer(objPtr.Kind()) && objPtr.CanAddr() {
objPtr = objPtr.Addr()
}
316
mt := hreflect.GetMethodByNameForType(objPtr.Type(), elemName)
if mt.Func.IsValid() {
// Receiver is the first argument.
args := []reflect.Value{objPtr}
num := mt.Type.NumIn()
maxNumIn := 1
if num > 1 && hreflect.IsContextType(mt.Type.In(1)) {
	args = append(args, ctx)
	maxNumIn = 2
}
327
switch {
case mt.PkgPath != "":
	return zero, fmt.Errorf("%s is an unexported method of type %s", elemName, typ)
…lines 331–335 unchanged (5 lines)
	return zero, fmt.Errorf("%s is a method of type %s but returns more than 2 outputs", elemName, typ)
case mt.Type.NumOut() == 1 && mt.Type.Out(0).Implements(errorType):
	return zero, fmt.Errorf("%s is a method of type %s but only returns an error type", elemName, typ)
case mt.Type.NumOut() == 2 && !mt.Type.Out(1).Implements(errorType):
	return zero, fmt.Errorf("%s is a method of type %s returning two values but the second value is not an error type", elemName, typ)
}
res := mt.Func.Call(args)
if len(res) == 2 && !res[1].IsNil() {
	return zero, fmt.Errorf("error at calling a method %s of type %s: %s", elemName, typ, res[1].Interface().(error))
}
return res[0], nil
}
348
…lines 349–498 unchanged (150 lines)

Before…lines 1–309 unchanged (309 lines)
// a struct or its pointer. If obj is a struct,
// to check all T and *T method, use obj pointer type Value
objPtr := obj
if !hreflect.IsInterfaceOrPointer(objPtr.Kind()) && objPtr.CanAddr() {
objPtr = objPtr.Addr()
}
316
index := hreflect.GetMethodIndexByName(objPtr.Type(), elemName)
if index != -1 {
var args []reflect.Value
mt := objPtr.Type().Method(index)
num := mt.Type.NumIn()
maxNumIn := 1
if num > 1 && hreflect.IsContextType(mt.Type.In(1)) {
	args = []reflect.Value{ctx}
	maxNumIn = 2
}
327
switch {
case mt.PkgPath != "":
	return zero, fmt.Errorf("%s is an unexported method of type %s", elemName, typ)
…lines 331–335 unchanged (5 lines)
	return zero, fmt.Errorf("%s is a method of type %s but returns more than 2 outputs", elemName, typ)
case mt.Type.NumOut() == 1 && mt.Type.Out(0).Implements(errorType):
	return zero, fmt.Errorf("%s is a method of type %s but only returns an error type", elemName, typ)
case mt.Type.NumOut() == 2 && !mt.Type.Out(1).Implements(errorType):
	return zero, fmt.Errorf("%s is a method of type %s returning two values but the second value is not an error type", elemName, typ)
}
res := objPtr.Method(mt.Index).Call(args)
if len(res) == 2 && !res[1].IsNil() {
	return zero, fmt.Errorf("error at calling a method %s of type %s: %s", elemName, typ, res[1].Interface().(error))
}
return res[0], nil
}
348
…lines 349–498 unchanged (150 lines)

After…lines 1–309 unchanged (309 lines)
// a struct or its pointer. If obj is a struct,
// to check all T and *T method, use obj pointer type Value
objPtr := obj
if !hreflect.IsInterfaceOrPointer(objPtr.Kind()) && objPtr.CanAddr() {
objPtr = objPtr.Addr()
}
316
mt := hreflect.GetMethodByNameForType(objPtr.Type(), elemName)
if mt.Func.IsValid() {
// Receiver is the first argument.
args := []reflect.Value{objPtr}
num := mt.Type.NumIn()
maxNumIn := 1
if num > 1 && hreflect.IsContextType(mt.Type.In(1)) {
	args = append(args, ctx)
	maxNumIn = 2
}
327
switch {
case mt.PkgPath != "":
	return zero, fmt.Errorf("%s is an unexported method of type %s", elemName, typ)
…lines 331–335 unchanged (5 lines)
	return zero, fmt.Errorf("%s is a method of type %s but returns more than 2 outputs", elemName, typ)
case mt.Type.NumOut() == 1 && mt.Type.Out(0).Implements(errorType):
	return zero, fmt.Errorf("%s is a method of type %s but only returns an error type", elemName, typ)
case mt.Type.NumOut() == 2 && !mt.Type.Out(1).Implements(errorType):
	return zero, fmt.Errorf("%s is a method of type %s returning two values but the second value is not an error type", elemName, typ)
}
res := mt.Func.Call(args)
if len(res) == 2 && !res[1].IsNil() {
	return zero, fmt.Errorf("error at calling a method %s of type %s: %s", elemName, typ, res[1].Interface().(error))
}
return res[0], nil
}
348
…lines 349–498 unchanged (150 lines)

Before…lines 1–309 unchanged (309 lines)
// a struct or its pointer. If obj is a struct,
// to check all T and *T method, use obj pointer type Value
objPtr := obj
if !hreflect.IsInterfaceOrPointer(objPtr.Kind()) && objPtr.CanAddr() {
objPtr = objPtr.Addr()
}
316
index := hreflect.GetMethodIndexByName(objPtr.Type(), elemName)
if index != -1 {
var args []reflect.Value
mt := objPtr.Type().Method(index)
num := mt.Type.NumIn()
maxNumIn := 1
if num > 1 && hreflect.IsContextType(mt.Type.In(1)) {
	args = []reflect.Value{ctx}
	maxNumIn = 2
}
327
switch {
case mt.PkgPath != "":
	return zero, fmt.Errorf("%s is an unexported method of type %s", elemName, typ)
…lines 331–335 unchanged (5 lines)
	return zero, fmt.Errorf("%s is a method of type %s but returns more than 2 outputs", elemName, typ)
case mt.Type.NumOut() == 1 && mt.Type.Out(0).Implements(errorType):
	return zero, fmt.Errorf("%s is a method of type %s but only returns an error type", elemName, typ)
case mt.Type.NumOut() == 2 && !mt.Type.Out(1).Implements(errorType):
	return zero, fmt.Errorf("%s is a method of type %s returning two values but the second value is not an error type", elemName, typ)
}
res := objPtr.Method(mt.Index).Call(args)
if len(res) == 2 && !res[1].IsNil() {
	return zero, fmt.Errorf("error at calling a method %s of type %s: %s", elemName, typ, res[1].Interface().(error))
}
return res[0], nil
}
348
…lines 349–498 unchanged (150 lines)

After…lines 1–309 unchanged (309 lines)
// a struct or its pointer. If obj is a struct,
// to check all T and *T method, use obj pointer type Value
objPtr := obj
if !hreflect.IsInterfaceOrPointer(objPtr.Kind()) && objPtr.CanAddr() {
objPtr = objPtr.Addr()
}
316
mt := hreflect.GetMethodByNameForType(objPtr.Type(), elemName)
if mt.Func.IsValid() {
// Receiver is the first argument.
args := []reflect.Value{objPtr}
num := mt.Type.NumIn()
maxNumIn := 1
if num > 1 && hreflect.IsContextType(mt.Type.In(1)) {
	args = append(args, ctx)
	maxNumIn = 2
}
327
switch {
case mt.PkgPath != "":
	return zero, fmt.Errorf("%s is an unexported method of type %s", elemName, typ)
…lines 331–335 unchanged (5 lines)
	return zero, fmt.Errorf("%s is a method of type %s but returns more than 2 outputs", elemName, typ)
case mt.Type.NumOut() == 1 && mt.Type.Out(0).Implements(errorType):
	return zero, fmt.Errorf("%s is a method of type %s but only returns an error type", elemName, typ)
case mt.Type.NumOut() == 2 && !mt.Type.Out(1).Implements(errorType):
	return zero, fmt.Errorf("%s is a method of type %s returning two values but the second value is not an error type", elemName, typ)
}
res := mt.Func.Call(args)
if len(res) == 2 && !res[1].IsNil() {
	return zero, fmt.Errorf("error at calling a method %s of type %s: %s", elemName, typ, res[1].Interface().(error))
}
return res[0], nil
}
348
…lines 349–498 unchanged (150 lines)

Before

source_file

comment "//"

comment "// Licensed under the Apache License, Version 2.0 (the \"Lice"...

comment "// you may not use this file except in compliance with the L"...

comment "// You may obtain a copy of the License at"

comment "// http://www.apache.org/licenses/LICENSE-2.0"

comment "//"

comment "// Unless required by applicable law or agreed to in writing"...

comment "// distributed under the License is distributed on an \"AS IS"...

comment "// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either expr"...

comment "// See the License for the specific language governing permi"...

comment "// limitations under the License."

package_clause

package "package"

package_identifier "collections"

import_declaration (+45 nodes collapsed)

comment "// Where returns a filtered subset of collection c."

method_declaration (+346 nodes collapsed)

method_declaration (+2676 nodes collapsed)

function_declaration

func "func"

identifier "evaluateSubElem"

parameter_list

( "("

parameter_declaration

identifier "ctx"

, ","

identifier "obj"

qualified_type

package_identifier "reflect"

. "."

type_identifier "Value"

, ","

parameter_declaration

identifier "elemName"

type_identifier "string"

) ")"

parameter_list

( "("

parameter_declaration

qualified_type

package_identifier "reflect"

. "."

type_identifier "Value"

, ","

parameter_declaration

type_identifier "error"

) ")"

block

{ "{"

statement_list

if_statement (+33 nodes collapsed)

short_var_declaration

expression_list

identifier "typ"

:= ":="

expression_list

call_expression

selector_expression

identifier "obj"

. "."

field_identifier "Type"

argument_list

( "("

) ")"

short_var_declaration

expression_list

identifier "obj"

, ","

identifier "isNil"

:= ":="

expression_list

call_expression

selector_expression

identifier "hreflect"

. "."

field_identifier "Indirect"

argument_list

( "("

identifier "obj"

) ")"

comment "// first, check whether obj has a method. In this case, obj "...

comment "// a struct or its pointer. If obj is a struct,"

comment "// to check all T and *T method, use obj pointer type Value"

short_var_declaration

expression_list

identifier "objPtr"

:= ":="

expression_list

identifier "obj"

if_statement (+47 nodes collapsed)

short_var_declaration

expression_list

identifier "index"

:= ":="

expression_list

call_expression

selector_expression

identifier "hreflect"

. "."

field_identifier "GetMethodIndexByName"

argument_list

( "("

call_expression

selector_expression

identifier "objPtr"

. "."

field_identifier "Type"

argument_list

( "("

) ")"

, ","

identifier "elemName"

) ")"

if_statement

if "if"

binary_expression

identifier "index"

!= "!="

unary_expression

- "-"

int_literal "1"

block

{ "{"

statement_list

var_declaration

var "var"

var_spec

identifier "args"

slice_type

[ "["

] "]"

qualified_type

package_identifier "reflect"

. "."

type_identifier "Value"

short_var_declaration

expression_list

identifier "mt"

:= ":="

expression_list

call_expression

selector_expression

call_expression

selector_expression

identifier "objPtr"

. "."

field_identifier "Type"

argument_list

( "("

) ")"

. "."

field_identifier "Method"

argument_list

( "("

identifier "index"

) ")"

short_var_declaration

expression_list

identifier "num"

:= ":="

expression_list

call_expression

selector_expression

identifier "mt"

. "."

field_identifier "Type"

. "."

field_identifier "NumIn"

argument_list

( "("

) ")"

short_var_declaration

expression_list

identifier "maxNumIn"

:= ":="

expression_list

int_literal "1"

if_statement

if "if"

binary_expression (+26 nodes collapsed)

block

{ "{"

statement_list

assignment_statement

expression_list

identifier "args"

= "="

expression_list

composite_literal

slice_type

[ "["

] "]"

qualified_type

package_identifier "reflect"

. "."

type_identifier "Value"

literal_value

{ "{"

literal_element

identifier "ctx"

} "}"

assignment_statement

expression_list

identifier "maxNumIn"

= "="

expression_list

int_literal "2"

} "}"

expression_switch_statement (+287 nodes collapsed)

short_var_declaration

expression_list

identifier "res"

:= ":="

expression_list

call_expression any 2:1

selector_expression any 2:1

call_expression any 2:1

selector_expression any 2:1

identifier "objPtr"

. "."

field_identifier "Method"

argument_list

( "("

selector_expression

identifier "mt"

. "."

field_identifier "Index"

) ")"

. "."

field_identifier "Call"

argument_list

( "("

identifier "args"

) ")"

if_statement (+70 nodes collapsed)

return_statement

return "return"

expression_list

index_expression

identifier "res"

[ "["

int_literal "0"

] "]"

, ","

nil "nil"

} "}"

comment "// elemName isn't a method so next start to check whether it"...

comment "// a struct field or a map value. In both cases, it mustn't "...

comment "// a nil value"

if_statement (+28 nodes collapsed)

assignment_statement

expression_list

identifier "obj"

= "="

expression_list

call_expression

selector_expression

identifier "reflect"

. "."

field_identifier "Indirect"

argument_list

( "("

identifier "obj"

) ")"

expression_switch_statement (+227 nodes collapsed)

return_statement (+21 nodes collapsed)

} "}"

comment "// parseWhereArgs parses the end arguments to the where func"...

comment "// match value and an operator, if one is defined."

function_declaration (+185 nodes collapsed)

comment "// checkWhereArray handles the where-matching logic when the"...

comment "// Array or Slice."

method_declaration (+504 nodes collapsed)

comment "// checkWhereMap handles the where-matching logic when the s"...

method_declaration (+500 nodes collapsed)

comment "// toString returns the string value if possible, \"\" if not."

method_declaration (+76 nodes collapsed)

After

source_file

comment "//"

comment "// Licensed under the Apache License, Version 2.0 (the \"Lice"...

comment "// you may not use this file except in compliance with the L"...

comment "// You may obtain a copy of the License at"

comment "// http://www.apache.org/licenses/LICENSE-2.0"

comment "//"

comment "// Unless required by applicable law or agreed to in writing"...

comment "// distributed under the License is distributed on an \"AS IS"...

comment "// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either expr"...

comment "// See the License for the specific language governing permi"...

comment "// limitations under the License."

package_clause

package "package"

package_identifier "collections"

import_declaration (+45 nodes collapsed)

comment "// Where returns a filtered subset of collection c."

method_declaration (+346 nodes collapsed)

method_declaration (+2676 nodes collapsed)

function_declaration

func "func"

identifier "evaluateSubElem"

parameter_list

( "("

parameter_declaration

identifier "ctx"

, ","

identifier "obj"

qualified_type

package_identifier "reflect"

. "."

type_identifier "Value"

, ","

parameter_declaration

identifier "elemName"

type_identifier "string"

) ")"

parameter_list

( "("

parameter_declaration

qualified_type

package_identifier "reflect"

. "."

type_identifier "Value"

, ","

parameter_declaration

type_identifier "error"

) ")"

block

{ "{"

statement_list

if_statement (+33 nodes collapsed)

short_var_declaration

expression_list

identifier "typ"

:= ":="

expression_list

call_expression

selector_expression

identifier "obj"

. "."

field_identifier "Type"

argument_list

( "("

) ")"

short_var_declaration

expression_list

identifier "obj"

, ","

identifier "isNil"

:= ":="

expression_list

call_expression

selector_expression

identifier "hreflect"

. "."

field_identifier "Indirect"

argument_list

( "("

identifier "obj"

) ")"

comment "// first, check whether obj has a method. In this case, obj "...

comment "// a struct or its pointer. If obj is a struct,"

comment "// to check all T and *T method, use obj pointer type Value"

short_var_declaration

expression_list

identifier "objPtr"

:= ":="

expression_list

identifier "obj"

if_statement (+47 nodes collapsed)

short_var_declaration

expression_list

identifier "mt"

:= ":="

expression_list

call_expression

selector_expression

identifier "hreflect"

. "."

field_identifier "GetMethodByNameForType"

argument_list

( "("

call_expression

selector_expression

identifier "objPtr"

. "."

field_identifier "Type"

argument_list

( "("

) ")"

, ","

identifier "elemName"

) ")"

if_statement

if "if"

call_expression

selector_expression

identifier "mt"

. "."

field_identifier "Func"

. "."

field_identifier "IsValid"

argument_list

( "("

) ")"

block

{ "{"

comment "// Receiver is the first argument."

statement_list

short_var_declaration

expression_list

identifier "args"

:= ":="

expression_list

composite_literal

slice_type

[ "["

] "]"

qualified_type

package_identifier "reflect"

. "."

type_identifier "Value"

literal_value

{ "{"

literal_element

identifier "objPtr"

} "}"

short_var_declaration

expression_list

identifier "num"

:= ":="

expression_list

call_expression

selector_expression

identifier "mt"

. "."

field_identifier "Type"

. "."

field_identifier "NumIn"

argument_list

( "("

) ")"

short_var_declaration

expression_list

identifier "maxNumIn"

:= ":="

expression_list

int_literal "1"

if_statement

if "if"

binary_expression (+26 nodes collapsed)

block

{ "{"

statement_list

assignment_statement

expression_list

identifier "args"

= "="

expression_list

call_expression

identifier "append"

argument_list

( "("

identifier "args"

, ","

identifier "ctx"

) ")"

assignment_statement

expression_list

identifier "maxNumIn"

= "="

expression_list

int_literal "2"

} "}"

expression_switch_statement (+287 nodes collapsed)

short_var_declaration

expression_list

identifier "res"

:= ":="

expression_list

call_expression any 2:1

selector_expression any 2:1

selector_expression

identifier "mt"

. "."

field_identifier "Func"

. "."

field_identifier "Call"

argument_list

( "("

identifier "args"

) ")"

if_statement (+70 nodes collapsed)

return_statement

return "return"

expression_list

index_expression

identifier "res"

[ "["

int_literal "0"

] "]"

, ","

nil "nil"

} "}"

comment "// elemName isn't a method so next start to check whether it"...

comment "// a struct field or a map value. In both cases, it mustn't "...

comment "// a nil value"

if_statement (+28 nodes collapsed)

assignment_statement

expression_list

identifier "obj"

= "="

expression_list

call_expression

selector_expression

identifier "reflect"

. "."

field_identifier "Indirect"

argument_list

( "("

identifier "obj"

) ")"

expression_switch_statement (+227 nodes collapsed)

return_statement (+21 nodes collapsed)

} "}"

comment "// parseWhereArgs parses the end arguments to the where func"...

comment "// match value and an operator, if one is defined."

function_declaration (+185 nodes collapsed)

comment "// checkWhereArray handles the where-matching logic when the"...

comment "// Array or Slice."

method_declaration (+504 nodes collapsed)

comment "// checkWhereMap handles the where-matching logic when the s"...

method_declaration (+500 nodes collapsed)

comment "// toString returns the string value if possible, \"\" if not."

method_declaration (+76 nodes collapsed)