75 lines
1.9 KiB
Go
75 lines
1.9 KiB
Go
package luar
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import (
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"reflect"
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"github.com/yuin/gopher-lua"
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)
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// Config is used to define luar behaviour for a particular *lua.LState.
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type Config struct {
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// The name generating function that defines under which names Go
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// struct fields will be accessed.
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//
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// If nil, the default behaviour is used:
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// - if the "luar" tag of the field is "", the field name and its name
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// with a lowercase first letter is returned
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// - if the tag is "-", no name is returned (i.e. the field is not
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// accessible)
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// - for any other tag value, that value is returned
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FieldNames func(s reflect.Type, f reflect.StructField) []string
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// The name generating function that defines under which names Go
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// methods will be accessed.
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//
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// If nil, the default behaviour is used:
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// - the method name and its name with a lowercase first letter
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MethodNames func(t reflect.Type, m reflect.Method) []string
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regular map[reflect.Type]*lua.LTable
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types *lua.LTable
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}
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func newConfig() *Config {
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return &Config{
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regular: make(map[reflect.Type]*lua.LTable),
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}
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}
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// GetConfig returns the luar configuration options for the given *lua.LState.
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func GetConfig(L *lua.LState) *Config {
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const registryKey = "github.com/layeh/gopher-luar"
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registry := L.Get(lua.RegistryIndex).(*lua.LTable)
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lConfig, ok := registry.RawGetString(registryKey).(*lua.LUserData)
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if !ok {
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lConfig = L.NewUserData()
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lConfig.Value = newConfig()
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registry.RawSetString(registryKey, lConfig)
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}
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return lConfig.Value.(*Config)
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}
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func defaultFieldNames(s reflect.Type, f reflect.StructField) []string {
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const tagName = "luar"
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tag := f.Tag.Get(tagName)
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if tag == "-" {
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return nil
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}
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if tag != "" {
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return []string{tag}
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}
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return []string{
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f.Name,
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getUnexportedName(f.Name),
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}
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}
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func defaultMethodNames(t reflect.Type, m reflect.Method) []string {
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return []string{
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m.Name,
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getUnexportedName(m.Name),
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}
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}
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