feat: add unary operators and variable assignment with precedence handling

Implement unary negation for numbers and logical not for booleans, introduce PREC_ASSIGNMENT and PREC_UNARY precedence levels, refactor parse functions to accept allowAssignment parameter, add assignment tests for global/local/chained/error cases, and update if-syntax to support statement branches and assignment in conditions.
2013-11-13 15:10:52 +00:00
parent 944591339f
commit 7eabd40181
15 changed files with 281 additions and 115 deletions
@@ -0,0 +1,3 @@
+io.write(!true)    // expect: false
+io.write(!false)   // expect: true
+io.write(!!true)   // expect: true