Crate webrust_macros 

webrust-macros — Proc-macros for WebRust

Provides the #[gui(...)] attribute and rewrites of print/println to support:

• F-strings-like formatting: println("Hello {user:?}, score={score:.2}")
• Inline LaTeX with $( ... ) (preserved for the renderer)
• #[gui(Font, Size, color, !bg)]: boots the GUI server and applies theme

#[gui(...)] Attribute

Compact, order-agnostic syntax:

• Font (capitalized tokens): Arial, Times_New_Roman → spaces restored
• Size: 14px, 16px, …
• Text color: black, #222, crimson, …
• Background: !white, !#f8fafc, …

Example:

use webrust::prelude::*;

#[gui(Times_New_Roman 13px white !fuchsia)]
fn main() {
    let user = "Ada";
    let score = 42.195;
    println("Hi {user:?}, score={score:.2}");
    println("Vector json: { [1,2,3] :j }");
}

Specifiers inside { ... }

• {:?} → Debug
• {:j} → Pretty JSON (HTML-safe, monospace block)
• {:c} → Compact debug (stringified)
• {:...} → Any standard format! spec (e.g., :.2, :>6, …)

Integration

• #[gui] wraps your function: initializes theme, starts io::gui, runs your code.
• Calls to print/println are rewritten into optimized format! pipelines.

Performance

• Fast scanning with memchr/memmem, minimized allocations
• Pre-sized buffers and compact tokenization

See webrust::io::gui for the runtime (HTTP API, validation, shutdown).

Attribute Macros

gui