Function preprocess

src/blade/preprocessor.rs:13–397

(content: &str)

}

pub fn preprocess(content: &str) -> (String, BladeSourceMap) {
    let mut virtual_php = String::with_capacity(content.len() + 512);
    let mut source_map = BladeSourceMap::default();

    // ── Prologue (5 lines) ──
    virtual_php.push_str("<?php if (!function_exists('blade_directive')) { function blade_directive(...$args) {} function blade_view_directive(...$args) {} }\n");
    virtual_php.push_str("/** @var \\Illuminate\\Support\\ViewErrorBag $errors */\n");
    virtual_php.push_str("$errors = new \\Illuminate\\Support\\ViewErrorBag();\n");
    virtual_php.push_str("/** @var \\Illuminate\\View\\Factory $__env */\n");
    virtual_php.push_str("$__env = new \\Illuminate\\View\\Factory();\n");
    // Wrap the template body in a function so that diagnostic
    // collectors (which only analyse function/method bodies) treat
    // the Blade content as analysable code.  The closing brace is
    // appended after the main loop.
    virtual_php.push_str("function __blade_template() {\n");

    let mut in_php_directive_block = false;
    let mut mode = Mode::Html;
    let mut paren_depth = 0;
    let mut in_string: Option<char> = None;
    let mut is_escaped = false;

    for line in content.lines() {
        let mut processed = String::new();
        let mut adjustments = vec![(0, 0)]; // (blade_utf16_col, php_utf16_col)

        let mut current_utf16_col = 0;
        let line_chars: Vec<char> = line.chars().collect();
        let mut buffer = String::new();

        if mode == Mode::Html && in_php_directive_block {
            mode = Mode::Php;
        }

        let mut char_idx = 0;
        while char_idx < line_chars.len() {
            let ch = line_chars[char_idx];

            if mode != Mode::Html {
                if let Some(quote) = in_string {
                    if is_escaped {
                        is_escaped = false;
                    } else if ch == '\\' {
                        is_escaped = true;
                    } else if ch == quote {
                        in_string = None;
                    }
                    buffer.push(ch);
                    char_idx += 1;
                    current_utf16_col += ch.len_utf16() as u32;
                    continue;
                } else if ch == '\'' || ch == '"' {
                    in_string = Some(ch);
                    buffer.push(ch);
                    char_idx += 1;
                    current_utf16_col += ch.len_utf16() as u32;
                    continue;
                }