static bool scan_jsx_text()

in tree-sitter-mozjs/src/scanner.c [292:331]

• 19 lines of code
• 9 McCabe index (conditional complexity)

static bool scan_jsx_text(TSLexer *lexer) {
    // saw_text will be true if we see any non-whitespace content, or any whitespace content that is not a newline and
    // does not immediately follow a newline.
    bool saw_text = false;
    // at_newline will be true if we are currently at a newline, or if we are at whitespace that is not a newline but
    // immediately follows a newline.
    bool at_newline = false;

    while (lexer->lookahead != 0 && lexer->lookahead != '<' && lexer->lookahead != '>' && lexer->lookahead != '{' &&
           lexer->lookahead != '}' && lexer->lookahead != '&') {
        bool is_wspace = iswspace(lexer->lookahead);
        if (lexer->lookahead == '\n') {
            at_newline = true;
        } else {
            // If at_newline is already true, and we see some whitespace, then it must stay true.
            // Otherwise, it should be false.
            //
            // See the table below to determine the logic for computing `saw_text`.
            //
            // |------------------------------------|
            // | at_newline | is_wspace | saw_text  |
            // |------------|-----------|-----------|
            // | false (0)  | false (0) | true  (1) |
            // | false (0)  | true  (1) | true  (1) |
            // | true  (1)  | false (0) | true  (1) |
            // | true  (1)  | true  (1) | false (0) |
            // |------------------------------------|

            at_newline &= is_wspace;
            if (!at_newline) {
                saw_text = true;
            }
        }

        advance(lexer);
    }

    lexer->result_symbol = JSX_TEXT;
    return saw_text;
}