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错误报告

¥Error Reporting

Stylus 具有出色的内置错误报告功能，可用于语法、解析和评估错误，包括堆栈跟踪、行号和文件名。

¥Stylus has fantastic error reporting built-in for syntax, parse, and evaluation errors—complete with stack traces, line numbers, and filenames.

解析错误

¥Parse Error

解析错误示例：

¥Parse error example:

     body
       form input
         == padding 5px

     body
       form input
         == padding 5px

产量：

¥Yielding:

ParseError: test.styl:3:16
  1| body
  2|    form input
  3|      == padding 5px
---------------------^
  4|

illegal unary "==", missing left-hand operand

ParseError: test.styl:3:16
  1| body
  2|    form input
  3|      == padding 5px
---------------------^
  4|

illegal unary "==", missing left-hand operand

评估错误

¥Evaluation Error

这个 "runtime" 或评估错误是由于将字符串传递给 border-radius() 而不是预期的 Unit （通过使用我们的助手 ensure(n, 'unit')）引起的。

¥This "runtime" or evaluation error is caused by passing a string to border-radius(), instead of the expected Unit (by using our helper ensure(n, 'unit')).

ensure(val, type)
  unless val is a type
    error('expected a ' + type + ', but got ' + typeof(val))

border-radius(n)
  ensure(n, 'unit')
  -webkit-border-radius n
  -moz-border-radius n
  border-radius n

body
  border-radius '5px'

ensure(val, type)
  unless val is a type
    error('expected a ' + type + ', but got ' + typeof(val))

border-radius(n)
  ensure(n, 'unit')
  -webkit-border-radius n
  -moz-border-radius n
  border-radius n

body
  border-radius '5px'

产量：

¥Yielding:

Error: test.styl:3:62
  1| ensure(val, type)
  2|     unless val is a type
  3|       error('expected a ' + type + ', but got ' + typeof(val))
-------------------------------------------------------------------^
  4|
  5| border-radius(n)
  6|   ensure(n, 'unit')

expected a unit, but got string
    at ensure() (test.styl:2:17)
    at border-radius() (test.styl:6:16)
    at "body" (test.styl:10:18)

Error: test.styl:3:62
  1| ensure(val, type)
  2|     unless val is a type
  3|       error('expected a ' + type + ', but got ' + typeof(val))
-------------------------------------------------------------------^
  4|
  5| border-radius(n)
  6|   ensure(n, 'unit')

expected a unit, but got string
    at ensure() (test.styl:2:17)
    at border-radius() (test.styl:6:16)
    at "body" (test.styl:10:18)