Rust

Get a Mail-Merge Replace Pattern

Demonstrates the Chilkat Email.GetReplacePattern method, which returns a replacement pattern — the search string — previously defined for mail-merge operations with SetReplacePattern. The index is zero-based. This example defines two patterns and enumerates them.

Background: In Chilkat's mail-merge, each entry is a pattern (a placeholder token such as FIRST_NAME) paired with a replacement string. GetReplacePattern retrieves the search side of the pair at a given index; GetReplaceString retrieves the matching replacement. Reading them back is useful for inspecting or logging exactly which substitutions will be applied when the message is sent.

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Rust

// Demonstrates the GetReplacePattern method, which returns a replacement pattern (the
// search string) previously defined for mail-merge operations with SetReplacePattern.
// The index is zero-based.

let email = chilkat::Email::new();
email.set_subject("Hello FIRST_NAME");
email.set_body("Dear FIRST_NAME, welcome to CITY.");

let _ = email.set_replace_pattern("FIRST_NAME", "John");
let _ = email.set_replace_pattern("CITY", "Denver");

let n = email.num_replace_patterns();
for i in 0..n {
    println!("Pattern {}: {}", i, email.get_replace_pattern(i).unwrap_or_default());
}