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fix: stop lexing negative numbers as single tokens to fix parsing of subtraction

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Previously, the lexer greedily consumed a `-` followed by a digit as a single negative number token, causing "1 -1" to be lexed as two number tokens instead of a minus operator and a positive literal. This broke parsing of subtraction expressions without spaces.

Now `-` always emits a TOKEN_MINUS, and the parser handles unary negation. This is a breaking change: `-16.sqrt` is now parsed as `-(16.sqrt)` instead of `(-16).sqrt`, requiring parentheses for negative method receivers. All number method tests (abs, ceil, floor, sqrt, toString) are updated to use explicit parentheses for negative receivers.
This commit is contained in:
Evan Shaw
2015-01-09 07:06:50 +00:00
parent 3f126945df
commit 0526cee655
7 changed files with 34 additions and 35 deletions
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test/number/to_string.wren
+3 -3
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@@ -1,5 +1,5 @@
IO.print(123.toString == "123") // expect: true
IO.print(-123.toString == "-123") // expect: true
IO.print(-0.toString == "-0") // expect: true
IO.print((-123).toString == "-123") // expect: true
IO.print((-0).toString == "-0") // expect: true
IO.print(12.34.toString == "12.34") // expect: true
IO.print(-0.0001.toString == "-0.0001") // expect: true
IO.print((-0.0001).toString == "-0.0001") // expect: true