31 lines
813 B
Go
31 lines
813 B
Go
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// Package tmplfuncs contains functions for injection into templates.
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package tmplfuncs
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import (
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"errors"
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"fmt"
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)
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// Args accepts pairs of string names and any values and constructs a map from them.
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// This is to help passing multiple arguments to a template from within a template.
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func Args(args ...any) (map[string]any, error) {
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if len(args)%2 != 0 {
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return nil, errors.New("args must have an even number of arguments")
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}
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res := make(map[string]any, len(args)/2)
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for i := 0; i < len(args); i += 2 {
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name, ok := args[i].(string)
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if !ok {
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return nil, fmt.Errorf("argument %d: want string, got %T", i, args[i])
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}
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value := args[i+1]
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if _, exists := res[name]; exists {
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return nil, fmt.Errorf("argument name %q occurs more than once", name)
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}
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res[name] = value
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}
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return res, nil
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}
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