Pine Script报错：newSupBox := box.new(行存在未续行换行匹配问题

问题描述 #

编写TradingView Pine Script时触发报错：输入不匹配：未使用行续行符就换行，期望输入')'，报错定位在newSupBox := box.new(行。

官方文档中box.new内置函数语法为：

box.new(top_left, bottom_right, border_color, border_width, border_style, extend, xloc, bgcolor, text, text_size, text_color, text_halign, text_valign, text_wrap, text_font_family, force_overlay, text_formatting) → series box

返回的盒子对象ID可用于box.set_*和box.get_*系列函数。

用户提供的报错代码片段：

// Add new support zone
if not na(pivotLow) and show_zones
    float zoneLow = low[pivot_right_bars]
    float zoneHigh = zoneLow + (zoneLow * zone_width_pct)

if not should_cluster(zoneLow, supZonesLow)
    array.push(supZonesLow, zoneLow)
    array.push(supZonesHigh, zoneHigh)
    
    int zoneIdx = array.size(supZonesLow)
    color zoneColor = zoneIdx > max_zones - highlight_zones ? color.new(color.green, 60) : color.new(color.green, 85)
    
    newSupBox = box.new(
        bar_index - pivot_right_bars, zoneHigh, // left, top
        bar_index + 50, zoneLow,               // right, bottom
        border_color=color.green, 
        bgcolor=zoneColor, 
        extend=extend.right
    )
    array.push(supZoneBoxes, newSupBox)
    
    if show_labels
        supLabel = label.new(
            bar_index - pivot_right_bars, zoneLow, 
            "SZ", 
            color=color.new(color.green, 20), 
            style=label.style_label_up, 
            textcolor=color.white, 
            size=get_label_size()
        )
        array.push(supZoneLabels, supLabel)
    
    // Remove oldest zones if over max
    if array.size(supZonesLow) > max_zones
        box.delete(array.shift(supZoneBoxes))
        if show_labels and array.size(supZoneLabels) > 0
            label.delete(array.shift(supZoneLabels))
        array.shift(supZonesLow)
        array.shift(supZonesHigh)

// Add new resistance zone
if not na(pivotHigh) and show_zones
    float zoneHigh = high[pivot_right_bars]
    float zoneLow = zoneHigh - (zoneHigh * zone_width_pct)

if not should_cluster(zoneHigh, resZonesHigh)
    array.push(resZonesLow, zoneLow)
    array.push(resZonesHigh, zoneHigh)
    
    int zoneIdx = array.size(resZonesLow)
    color zoneColor = zoneIdx > max_zones - highlight_zones ? color.new(color.red, 60) : color.new(color.red, 85)
    
    newResBox = box.new(
        bar_index - pivot_right_bars, zoneHigh, // left, top
        bar_index + 50, zoneLow,               // right, bottom
        border_color=color.red, 
        bgcolor=zoneColor, 
        extend=extend.right
    )
    array.push(resZoneBoxes, newResBox)
    
    if show_labels
        resLabel = label.new(
            bar_index - pivot_right_bars, zoneHigh, 
            "RZ", 
            color=color.new(color.red, 20), 
            style=label.style_label_down, 
            textcolor=color.white, 
            size=get_label_size()
        )
        array.push(resZoneLabels, resLabel)

报错原因 #

Pine Script解析器对函数参数行末尾的注释处理存在限制：当你在参数行末尾添加//注释后直接换行，解析器会将注释后的换行判定为未使用续行符的换行，进而认为函数调用未完成，缺少闭合的)，触发输入不匹配报错。

解决方法 #

将参数行末尾的注释移至单独行（参数上方或下方），避免干扰解析器识别函数参数：

修改后的代码示例：

// Add new support zone
if not na(pivotLow) and show_zones
    float zoneLow = low[pivot_right_bars]
    float zoneHigh = zoneLow + (zoneLow * zone_width_pct)

if not should_cluster(zoneLow, supZonesLow)
    array.push(supZonesLow, zoneLow)
    array.push(supZonesHigh, zoneHigh)
    
    int zoneIdx = array.size(supZonesLow)
    color zoneColor = zoneIdx > max_zones - highlight_zones ? color.new(color.green, 60) : color.new(color.green, 85)
    
    // 参数说明：left=bar_index - pivot_right_bars, top=zoneHigh; right=bar_index + 50, bottom=zoneLow
    newSupBox = box.new(
        bar_index - pivot_right_bars, zoneHigh,
        bar_index + 50, zoneLow,
        border_color=color.green, 
        bgcolor=zoneColor, 
        extend=extend.right
    )
    array.push(supZoneBoxes, newSupBox)
    
    if show_labels
        supLabel = label.new(
            bar_index - pivot_right_bars, zoneLow, 
            "SZ", 
            color=color.new(color.green, 20), 
            style=label.style_label_up, 
            textcolor=color.white, 
            size=get_label_size()
        )
        array.push(supZoneLabels, supLabel)
    
    // Remove oldest zones if over max
    if array.size(supZonesLow) > max_zones
        box.delete(array.shift(supZoneBoxes))
        if show_labels and array.size(supZoneLabels) > 0
            label.delete(array.shift(supZoneLabels))
        array.shift(supZonesLow)
        array.shift(supZonesHigh)

// Add new resistance zone
if not na(pivotHigh) and show_zones
    float zoneHigh = high[pivot_right_bars]
    float zoneLow = zoneHigh - (zoneHigh * zone_width_pct)

if not should_cluster(zoneHigh, resZonesHigh)
    array.push(resZonesLow, zoneLow)
    array.push(resZonesHigh, zoneHigh)
    
    int zoneIdx = array.size(resZonesLow)
    color zoneColor = zoneIdx > max_zones - highlight_zones ? color.new(color.red, 60) : color.new(color.red, 85)
    
    // 参数说明：left=bar_index - pivot_right_bars, top=zoneHigh; right=bar_index + 50, bottom=zoneLow
    newResBox = box.new(
        bar_index - pivot_right_bars, zoneHigh,
        bar_index + 50, zoneLow,
        border_color=color.red, 
        bgcolor=zoneColor, 
        extend=extend.right
    )
    array.push(resZoneBoxes, newResBox)
    
    if show_labels
        resLabel = label.new(
            bar_index - pivot_right_bars, zoneHigh, 
            "RZ", 
            color=color.new(color.red, 20), 
            style=label.style_label_down, 
            textcolor=color.white, 
            size=get_label_size()
        )
        array.push(resZoneLabels, resLabel)

也可以选择直接去掉行内注释，同样能解决报错问题。

内容的提问来源于stack exchange，提问作者rufayoade