go-pkg/expr
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Since now builtin functions are registared in a new global context. This reduces the effort to copy the whole set of builtin functions in the context of a function call; only the called function will be copied, if it is global.

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This commit is contained in:
Celestino Amoroso
2024-05-11 10:45:38 +02:00
parent 0a9543543d
commit 50e7168214
6 changed files with 88 additions and 31 deletions
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operand-func.go
+5 -2
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@@ -23,7 +23,7 @@ func newFuncCallTerm(tk *Token, args []*term) *term {
// -------- eval func call
func checkFunctionCall(ctx ExprContext, name string, params []any) (err error) {
if info, exists := ctx.GetFuncInfo(name); exists {
if info, exists, owner := GetFuncInfo(ctx, name); exists {
if info.MinArgs() > len(params) {
if info.MaxArgs() < 0 {
err = fmt.Errorf("too few params -- expected %d or more, got %d", info.MinArgs(), len(params))
@@ -31,9 +31,12 @@ func checkFunctionCall(ctx ExprContext, name string, params []any) (err error) {
err = fmt.Errorf("too few params -- expected %d, got %d", info.MinArgs(), len(params))
}
}
if info.MaxArgs() >= 0 && info.MaxArgs() < len(params) {
if err == nil && info.MaxArgs() >= 0 && info.MaxArgs() < len(params) {
err = fmt.Errorf("too much params -- expected %d, got %d", info.MaxArgs(), len(params))
}
if err == nil && owner != ctx {
ctx.RegisterFunc(name, info.Functor(), info.MinArgs(), info.MaxArgs())
}
} else {
err = fmt.Errorf("unknown function %s()", name)
}