65 lines
1.3 KiB
Go
65 lines
1.3 KiB
Go
// simple-var-store.go
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package expr
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import "fmt"
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type SimpleFuncStore struct {
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varStore map[string]any
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funcStore map[string]FuncTemplate
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}
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type funcInfo struct {
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name string
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// minArgs int
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// maxArgs int
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}
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func (info *funcInfo) Name() string {
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return info.name
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}
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func (info *funcInfo) MinArgs() int {
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return 0
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}
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func (info *funcInfo) MaxArgs() int {
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return -1
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}
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func NewSimpleFuncStore() *SimpleFuncStore {
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return &SimpleFuncStore{
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varStore: make(map[string]any),
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funcStore: make(map[string]FuncTemplate),
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}
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}
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func (ctx *SimpleFuncStore) GetValue(varName string) (v any, exists bool) {
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v, exists = ctx.varStore[varName]
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return
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}
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func (ctx *SimpleFuncStore) SetValue(varName string, value any) {
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ctx.varStore[varName] = value
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}
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func (ctx *SimpleFuncStore) GetFuncInfo(name string) (f exprFunc) {
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var exists bool
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if _, exists = ctx.funcStore[name]; exists {
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f = &funcInfo{name: name}
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}
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return
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}
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func (ctx *SimpleFuncStore) RegisterFunc(name string, f FuncTemplate, minArgs, maxArgs int) {
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ctx.funcStore[name] = f
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}
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func (ctx *SimpleFuncStore) Call(name string, args []any) (result any, err error) {
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if f, exists := ctx.funcStore[name]; exists {
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result, err = f(ctx, name, args)
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} else {
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err = fmt.Errorf("unknown function %s()", name)
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}
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return
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}
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