@antv/util/esm/path/parser/scan-flag.js

> AntV 底层依赖的工具库，不建议在自己业务中使用。

/**
 * Validates an A (arc-to) specific path command value.
 * Usually a `large-arc-flag` or `sweep-flag`.
 */
export function scanFlag(path) {
    var index = path.index, pathValue = path.pathValue;
    var code = pathValue.charCodeAt(index);
    if (code === 0x30 /* 0 */) {
        path.param = 0;
        path.index += 1;
        return;
    }
    if (code === 0x31 /* 1 */) {
        path.param = 1;
        path.index += 1;
        return;
    }
    path.err = "[path-util]: invalid Arc flag \"" + pathValue[index] + "\", expecting 0 or 1 at index " + index;
}
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