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java.lang.Objectorg.statcato.calculator.MathExpParserComplete
public class MathExpParserComplete
A parser for mathematical expressions using the recurive descent algorithm. Acceptable expressions are defined by the following grammar:
E -> T { ("+" | "-") T}
T -> F { ("*" | "/") F}
F -> P {"^" F}
P -> v | "(" E ")" | "-" T | func_name"(" E ")" | Cx | "'" L "'"
L -> column_label
where expressions enclosed by { } can appear zero or more times.
Constructor Summary | |
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MathExpParserComplete(Spreadsheet sp)
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Method Summary | |
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java.lang.String |
getError()
Returns error message from the scanner. |
CompUnit |
parse(java.lang.String exp,
boolean isRadian)
Parses the given expression. |
CompUnit |
S()
Parses a statement. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public MathExpParserComplete(Spreadsheet sp)
Method Detail |
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public CompUnit parse(java.lang.String exp, boolean isRadian)
exp
- expression in stringisRadian
- boolean value of whether radians are usedpublic java.lang.String getError()
public CompUnit S()
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