refactor(codegen): Extract common generators

Extract generators for common constructcs such as errors.New or
errors.Join, providing a more expressive syntax where called.

Author: stroiman

internal/code-gen/script-wrappers/es_wrapper_generator.go

@@ -10,6 +10,7 @@ import (
 	. "github.com/gost-dom/code-gen/internal"
 	"github.com/gost-dom/code-gen/packagenames"
 	"github.com/gost-dom/code-gen/script-wrappers/configuration"
+	"github.com/gost-dom/code-gen/stdgen"
 	g "github.com/gost-dom/generators"
 	"github.com/gost-dom/webref/idl"
 	legacy "github.com/gost-dom/webref/idl/legacy"
@@ -298,10 +299,14 @@ func (d ESConstructorData) WrapperFunctionsToGenerate() iter.Seq[ESOperation] {
 		}
 		for _, a := range d.Attributes {
 			if a.Getter != nil && !a.Getter.CustomImplementation {
-				yield(*a.Getter)
+				if !yield(*a.Getter) {
+					return
+				}
 			}
 			if a.Setter != nil && !a.Setter.CustomImplementation {
-				yield(*a.Setter)
+				if !yield(*a.Setter) {
+					return
+				}
 			}
 		}
 	}
@@ -318,11 +323,7 @@ func ReturnOnAnyError(errNames []g.Generator) g.Generator {
 	}
 	return g.StatementList(
 		g.Assign(g.Id("err"),
-			g.Raw(jen.Qual("errors", "Join").CallFunc(func(g *jen.Group) {
-				for _, e := range errNames {
-					g.Add(e.Generate())
-				}
-			})),
+			stdgen.ErrorsJoin(errNames...),
 		),
 		ReturnOnError{},
 	)

internal/code-gen/script-wrappers/v8_generators.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 
 	. "github.com/gost-dom/code-gen/internal"
+	"github.com/gost-dom/code-gen/stdgen"
 	g "github.com/gost-dom/generators"
 
 	"github.com/dave/jennifer/jen"
@@ -48,9 +49,7 @@ func (gen V8TargetGenerators) CreateInitFunction(data ESConstructorData) g.Gener
 }
 
 func (gen V8TargetGenerators) ReturnErrMsg(errGen g.Generator) g.Generator {
-	return g.Return(g.Nil,
-		g.NewValuePackage("New", "errors").Call(errGen),
-	)
+	return g.Return(g.Nil, stdgen.ErrorsNew(errGen))
 }
 
 func (gen V8TargetGenerators) WrapperStructGenerators() PlatformWrapperStructGenerators {
@@ -294,7 +293,7 @@ func CreateV8WrapperMethodInstanceInvocations(
 				statements.Append(
 					g.Return(
 						g.Nil,
-						g.Raw(jen.Qual("errors", "New").Call(jen.Lit(missingArgsConts))),
+						stdgen.ErrorsNew(g.Lit(missingArgsConts)),
 					),
 				)
 				break

internal/code-gen/stdgen/stdgen.go

@@ -8,3 +8,11 @@ import (
 func LogDebug(args ...g.Generator) g.Generator {
 	return g.NewValuePackage("Debug", packagenames.Log).Call(args...)
 }
+
+func ErrorsJoin(args ...g.Generator) g.Generator {
+	return g.NewValuePackage("Join", "errors").Call(args...)
+}
+
+func ErrorsNew(arg g.Generator) g.Generator {
+	return g.NewValuePackage("New", "errors").Call(arg)
+}