vidyasagarv.com
A typst plugin for unit-aware calculations
typst
Initial example
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Cargo.lock
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Cargo.lock
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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version = 4
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[[package]]
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name = "numbat-typst"
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version = "0.1.0"
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dependencies = [
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"typst-wasm-protocol",
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]
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[[package]]
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name = "proc-macro2"
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version = "1.0.103"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "5ee95bc4ef87b8d5ba32e8b7714ccc834865276eab0aed5c9958d00ec45f49e8"
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dependencies = [
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"unicode-ident",
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]
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[[package]]
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name = "quote"
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version = "1.0.42"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "a338cc41d27e6cc6dce6cefc13a0729dfbb81c262b1f519331575dd80ef3067f"
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dependencies = [
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"proc-macro2",
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]
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[[package]]
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name = "syn"
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version = "2.0.111"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "390cc9a294ab71bdb1aa2e99d13be9c753cd2d7bd6560c77118597410c4d2e87"
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dependencies = [
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"proc-macro2",
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"quote",
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"unicode-ident",
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]
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[[package]]
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name = "typst-wasm-macros"
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version = "0.0.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "0df89cf4e273dca9ca1a971f86d5bc12f7ec79d008fbc11037dbc8f821196316"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn",
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"venial",
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]
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[[package]]
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name = "typst-wasm-protocol"
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version = "0.0.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1e74aabca9c7bb93eb529915add290b6cc11231f3fb36f2c6080007a658699df"
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dependencies = [
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"typst-wasm-macros",
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]
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[[package]]
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name = "unicode-ident"
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version = "1.0.22"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9312f7c4f6ff9069b165498234ce8be658059c6728633667c526e27dc2cf1df5"
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[[package]]
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name = "venial"
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version = "0.6.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9a42528baceab6c7784446df2a10f4185078c39bf73dc614f154353f1a6b1229"
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dependencies = [
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"proc-macro2",
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"quote",
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]
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Cargo.toml
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Cargo.toml
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README.md
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README.md
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# Typst plugin for [numbat](https://numbat.dev)
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Built using [typst-wasm](https://github.com/sjfhsjfh/typst-wasm).
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First compile the rust code to WASM using:
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```sh
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cargo build --target wasm32-unknown-unknown --release
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```
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Then install the Typst package locally using:
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```sh
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tlp init
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```
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Then just load the functions like:
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```typ
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#import "@local/numbat:0.1.0": to_uppercase
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```
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src/lib.rs
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src/lib.rs
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use std::str;
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use typst_wasm_protocol::wasm_export;
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// Simple string operation function
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#[wasm_export]
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fn to_uppercase(input: &[u8]) -> Vec<u8> {
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let input_str = match str::from_utf8(input) {
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Ok(s) => s,
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Err(_) => return b"Invalid UTF-8 input".to_vec(),
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};
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input_str.to_uppercase().into_bytes()
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}
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// Using custom export name
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#[wasm_export(export_rename = "count_chars")]
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fn count_characters(input: &[u8]) -> Vec<u8> {
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let input_str = match str::from_utf8(input) {
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Ok(s) => s,
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Err(_) => return b"Invalid UTF-8 input".to_vec(),
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};
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format!("Character count: {}", input_str.chars().count()).into_bytes()
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}
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// Function returning Result type
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#[wasm_export]
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fn divide_numbers(input: &[u8]) -> Result<String, String> {
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let input_str = str::from_utf8(input).map_err(|e| format!("UTF-8 error: {}", e))?;
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let numbers: Vec<&str> = input_str.split(',').collect();
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if numbers.len() != 2 {
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return Err("Expected two comma-separated numbers".to_string());
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}
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let a: f64 = numbers[0]
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.trim()
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.parse()
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.map_err(|_| "First value is not a valid number".to_string())?;
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let b: f64 = numbers[1]
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.trim()
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.parse()
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.map_err(|_| "Second value is not a valid number".to_string())?;
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if b == 0.0 {
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return Err("Cannot divide by zero".to_string());
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}
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let result = a / b;
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Ok(format!("Result: {:.2}", result))
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}
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// Function returning Result<String, String> type
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#[wasm_export]
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fn validate_email(input: &[u8]) -> Result<String, String> {
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let email = str::from_utf8(input)
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.map_err(|e| format!("UTF-8 error: {}", e))?
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.trim();
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// Simple email validation
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if !email.contains('@') || !email.contains('.') {
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return Err("Invalid email format".to_string());
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}
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Ok("Email is valid".to_string())
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}
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src/lib.typ
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src/lib.typ
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tests/examples.typ
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tests/examples.typ
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#import "@local/numbat:0.1.0": to_uppercase, count_chars, divide_numbers, validate_email
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= Tests
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Hi there!
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#let input = "Hello, Typst!"
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// Call the to_uppercase function
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#let uppercase = str(to_uppercase(bytes(input)))
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Original: #input\
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Uppercase: #uppercase
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// Call the count_chars function (note this is exported with a custom name)
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#let char_count = str(count_chars(bytes(input)))
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#char_count
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// Call a function that returns a Result type
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#let division_result = str(divide_numbers(bytes("10,2")))
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#division_result
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// Handle potential errors, uncomment to see the error handling in action
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// #let division_error = divide_numbers(bytes("10,0"))
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// Use a function with Result<String, String> type
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#let email_valid = str(validate_email(bytes("user@example.com")))
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Email validation: #email_valid