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adding until loops as the inverse of while loops

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Jeremy Ashkenas
2010-04-28 22:08:00 -04:00
parent 17ba44056e
commit adbcd320b2
10 changed files with 133 additions and 101 deletions
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4
src/grammar.coffee
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@@ -414,6 +414,8 @@ grammar: {
WhileSource: [
o "WHILE Expression", -> new WhileNode $2
o "WHILE Expression WHEN Expression", -> new WhileNode $2, {guard : $4}
o "UNTIL Expression", -> new WhileNode $2, {invert: true}
o "UNTIL Expression WHEN Expression", -> new WhileNode $2, {invert: true, guard: $4}
]
# The while loop can either be normal, with a block of expressions to execute,
@@ -603,7 +605,7 @@ operators: [
["right", 'FOR', 'NEW', 'SUPER', 'CLASS']
["left", 'EXTENDS']
["right", 'ASSIGN', 'RETURN']
["right", '->', '=>', '<-', 'UNLESS', 'IF', 'ELSE', 'WHILE']
["right", '->', '=>', '<-', 'UNLESS', 'IF', 'ELSE', 'WHILE', 'UNTIL']
]
# Wrapping Up