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feat: treat null as falsey in conditional and logical operator branches

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Update the VM interpreter to treat null as falsey alongside false in if, while, for, and logical AND/OR operations. Remove the TODO comment and adjust short-circuit logic in OP_JUMP_IF and OP_JUMP_IF_NOT branches. Refactor existing test files into subdirectories (if/, logical_operator/, while/) and add dedicated truthiness tests for each construct. Remove old test/if.wren and update and/or tests to exclude null/0/"" truthiness checks now that null is falsey.
This commit is contained in:
Bob Nystrom
2014-01-21 02:12:55 +00:00
parent a696c060fc
commit a5c4918a75
13 changed files with 118 additions and 58 deletions
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test/if/else.wren
+10
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@@ -0,0 +1,10 @@
// Evaluate the 'else' expression if the condition is false.
if (true) IO.print("good") else IO.print("bad") // expect: good
if (false) IO.print("bad") else IO.print("good") // expect: good
// Allow block body.
if (false) null else { IO.print("block") } // expect: block
// Newline after "else".
if (false) IO.print("bad") else
IO.print("good") // expect: good