Exemple #1
0
func stringsLength(context *runtime.FunctionCallContext) (*runtime.Value, error) {
	if err := runtime.ValidateArguments(context, runtime.StringValue); err != nil {
		return nil, err
	}

	return runtime.NewNumberValueFromInt64(int64(len(context.Args[0].Str))), nil
}
Exemple #2
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func listSize(context *runtime.FunctionCallContext) (*runtime.Value, error) {
	if err := runtime.ValidateArguments(context, runtime.ListValue); err != nil {
		return nil, err
	}

	return runtime.NewNumberValueFromInt64(int64(len(context.Args[0].List))), nil
}
Exemple #3
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func mathMod(context *runtime.FunctionCallContext) (*runtime.Value, error) {
	if err := runtime.ValidateArguments(context, runtime.NumberValue, runtime.NumberValue); err != nil {
		return nil, err
	}

	return runtime.NewNumberValueFromInt64(context.Args[0].NumberToInt64() % context.Args[1].NumberToInt64()), nil
}
Exemple #4
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func builtinFor(context *runtime.MacroCallContext) (*runtime.Value, error) {
	l, err := context.Block.EvalNode(context.Nodes[0])

	if err != nil {
		return nil, err
	}

	if l.Type != runtime.ListValue {
		return nil, runtime.NewRuntimeError(context.Nodes[0].Pos(), "expected a list to iterate over")
	}

	var args []string

	for _, nameNode := range context.Nodes[1].(*parser.ListNode).Nodes {
		ident, isIdent := nameNode.(*parser.IdentifierNode)

		if isIdent {
			args = append(args, ident.Token.Data)
		} else {
			return nil, runtime.NewRuntimeError(nameNode.Pos(), "expected an identifier")
		}
	}

	if len(args) > 2 {
		return nil, runtime.NewRuntimeError(context.Nodes[1].Pos(), "too many arguments provided")
	}

	callbackBlock := runtime.NewBlock([]parser.Node{context.Nodes[2]}, runtime.NewScope(context.Block.Scope))

	for i, item := range l.List {
		if len(args) >= 1 {
			callbackBlock.Scope.SetSymbol(args[0], runtime.NewSymbol(item))
		}

		if len(args) == 2 {
			callbackBlock.Scope.SetSymbol(args[1], runtime.NewSymbol(runtime.NewNumberValueFromInt64(int64(i))))
		}

		_, err := callbackBlock.Eval()

		if err != nil {
			return nil, err
		}
	}

	return runtime.Nil, nil
}
Exemple #5
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func listSeq(context *runtime.FunctionCallContext) (*runtime.Value, error) {
	if err := runtime.ValidateArguments(context, runtime.NumberValue, runtime.NumberValue); err != nil {
		return nil, err
	}

	low := context.Args[0].NumberToInt64()
	high := context.Args[1].NumberToInt64()

	if low > high {
		return nil, runtime.NewRuntimeError(context.Pos, "invalid argument(s), low can't be higher than high (%d > %d)", low, high)
	}

	l := runtime.NewListValue()

	for i := low; i <= high; i++ {
		l.List = append(l.List, runtime.NewNumberValueFromInt64(i))
	}

	return l, nil
}