[ruby/irb] Allow assigning and using local variable name conflicting

with command
(https://github.com/ruby/irb/pull/961)

https://github.com/ruby/irb/commit/00603d470f

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/irb.rb b/lib/irb.rb
index b3435c257e..b417d9c2ec 100644
--- a/lib/irb.rb
+++ b/lib/irb.rb
@@ -1138,6 +1138,8 @@ module IRB
       end
     end
 
+    ASSIGN_OPERATORS_REGEXP = Regexp.union(%w[= += -= *= /= %= **= &= |= &&= ||= ^= <<= >>=])
+
     def parse_command(code)
       command_name, arg = code.strip.split(/\s+/, 2)
       return unless code.lines.size == 1 && command_name
@@ -1149,6 +1151,12 @@ module IRB
         return [alias_name, arg]
       end
 
+      # Assignment-like expression is not a command
+      return if arg.start_with?(ASSIGN_OPERATORS_REGEXP) && !arg.start_with?(/==|=~/)
+
+      # Local variable have precedence over command
+      return if @context.local_variables.include?(command)
+
       # Check visibility
       public_method = !!Kernel.instance_method(:public_method).bind_call(@context.main, command) rescue false
       private_method = !public_method && !!Kernel.instance_method(:method).bind_call(@context.main, command) rescue false