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finally, think we have this if/else/if/else/else thing licke

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Jeremy Ashkenas
2010-02-13 01:02:10 -05:00
parent 0f26072ad0
commit 3dc456572b
7 changed files with 36 additions and 38 deletions
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14
src/grammar.coffee
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@@ -34,7 +34,7 @@ operators: [
["right", 'THROW', 'FOR', 'NEW', 'SUPER']
["left", 'EXTENDS']
["right", 'ASSIGN', 'RETURN']
["right", '->', '=>', 'UNLESS', 'IF', 'ELSE', 'ELSIF', 'WHILE']
["right", '->', '=>', 'UNLESS', 'IF', 'ELSE', 'WHILE']
]
# Grammar ==============================================================
@@ -410,25 +410,25 @@ grammar: {
]
# The most basic form of "if".
IfBlock: [
IfStart: [
o "IF Expression Block", -> new IfNode($2, $3)
o "IF Expression Block ElsIfs", -> (new IfNode($2, $3)).add_else($4)
o "IfStart ElsIfs", -> $1.add_else($2)
]
ElsIf: [
o "ELSEIF Expression Block", -> new IfNode($2, $3)
IfBlock: [
o "IfStart", -> $1
o "IfStart ELSE Block", -> $1.add_else($3)
]
# Multiple elsifs can be chained together.
ElsIfs: [
o "ElsIf", -> $1.force_statement()
o "ELSE IF Expression Block", -> (new IfNode($3, $4)).force_statement()
o "ElsIfs ElsIf", -> $1.add_else($2)
]
# The full complement of if blocks, including postfix one-liner ifs and unlesses.
If: [
o "IfBlock", -> $1
o "IfBlock ELSE Block", -> $1.add_else($3)
o "Expression IF Expression", -> new IfNode($3, Expressions.wrap([$1]), null, {statement: true})
o "Expression UNLESS Expression", -> new IfNode($3, Expressions.wrap([$1]), null, {statement: true, invert: true})
]