Arithmetic evaluation: Difference between revisions
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classify=: '$()*/+-'&(((>:@#@[ # 2:) #: 2 ^ i.)&;:) |
classify=: '$()*/+-'&(((>:@#@[ # 2:) #: 2 ^ i.)&;:) |
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rules=: '' |
rules=: <nowiki>''</nowiki> |
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patterns=: ,"0 assert 1 |
patterns=: ,"0 assert 1 |
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stack=: classify '$$$$' |
stack=: classify '$$$$' |
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tokens=: ]&.>i.#words |
tokens=: ]&.>i.#words |
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tree=: '' |
tree=: <nowiki>''</nowiki> |
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while.(#queue)+.6<#stack do. |
while.(#queue)+.6<#stack do. |
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rule=: rules {~ i.&1 patterns (*./"1)@:(+./"1) .(*."1)4{.stack |
rule=: rules {~ i.&1 patterns (*./"1)@:(+./"1) .(*."1)4{.stack |
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rule`:6'' |
rule`:6<nowiki>''</nowiki> |
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end. |
end. |
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'syntax' assert 1 0 1 1 1 1 -: {:"1 stack |
'syntax' assert 1 0 1 1 1 1 -: {:"1 stack |
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You can also display the syntax tree, for example: |
You can also display the syntax tree, for example: |
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parse '1+1' |
parse '1+1' |
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=={{header|Pascal}}== |
=={{header|Pascal}}== |
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