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.

This commit is contained in:

Bob Nystrom

2013-11-13 15:10:52 +00:00

parent 944591339f

commit 7eabd40181

15 changed files with 281 additions and 115 deletions

test/assign_to_prefix_operator.wren

View File

@@ -0,0 +1,2 @@
 var a = "a"
 !a = "value" // expect error