如何检查 ruby​​ 代码中的 ruby​​ 语法错误 [英] How to check ruby syntax error in ruby code

问题描述

我现在使用以下来检查语法错误:

I use following now to check syntax error:

system "ruby -wc path/to/file.rb"

但是如果文件太多(例如，我重构代码)会很浪费时间，所以我的问题是: 有没有办法在 ruby​​ 代码中检查 ruby​​ 语法?

but it very waste time if there are too many file(for instance, i refactory code), so my question is: is there way to ruby syntax check in ruby code?

推荐答案

在 MRI 下，您可以使用 RubyVM::InstructionSequence#compile (相关文档) 来编译 Ruby 代码(如果有错误会抛出异常):

Under MRI, you can use RubyVM::InstructionSequence#compile (relevant documentation) to compile Ruby code (which will throw exceptions if there are errors):

2.1.0 :001 > RubyVM::InstructionSequence.compile "a = 1 + 2"
 => <RubyVM::InstructionSequence:<compiled>@<compiled>>

2.1.0 :002 > RubyVM::InstructionSequence.compile "a = 1 + "
<compiled>:1: syntax error, unexpected end-of-input
a = 1 +
        ^
SyntaxError: compile error
        from (irb):2:in `compile'
        from (irb):2
        from /usr/local/rvm/rubies/ruby-2.1.0/bin/irb:11:in `<main>'

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