How Can I Retrieve Variable Names from Source Code Using Reflection for Templating?

Variable Name Retrieval Using Reflection

In an attempt to construct a user-friendly templating system, the question arises: how can the variable name be obtained as it appears in the source code using reflection?

The goal is to create a slice of variables (strings) and iterate through it, replacing markup {{}} placeholders with actual variable values. For instance, if the variable name is onevar, the system should scan the template for {{onevar}} and replace it with the variable's value.

This task involves understanding the nature of reflection when dealing with variables. In the provided code snippet:

onevar := "something"
other := "something else"

var msg string
sa := []string{onevar, other}
for _, v := range sa {
    vName := reflect.TypeOf(v).Name()
    vName = fmt.Sprintf("{{%s}}", vName)
    msg = strings.Replace(msg, vName, v, -1)
}

The code attempts to retrieve the variable name by utilizing reflection:

vName := reflect.TypeOf(v).Name()

However, this approach is unsuccessful because a slice contains values, not variables. Therefore, obtaining the variable name from a slice proves impossible.

Solution:
To address this issue, consider using a map instead of a slice, as maps associate keys (variable names) with values:

vars := map[string]string{
    "onevar": "something",
    "other": "something else",
}

var msg string
for name, value := range vars {
    vName := fmt.Sprintf("{{%s}}", name)
    msg = strings.Replace(msg, vName, value, -1)
}

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