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Title |
Test
Details
Arithmetic expression assignment
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Expression |
(?<id>[A-Za-z_][0-9A-Za-z_]*) (?<op>\=) (?: (?> (?: (?<= ((\.[0-9]+|[0-9]+(\.[0-9]+)?)([eE][-+][0-9]+)?|[0-9]+) | [A-Za-z_][0-9A-Za-z_]* | \) ) (?<op> \+ | \* ) ( ?= ((\.[0-9]+|[0-9]+(\.[0-9]+)?)([eE][-+][0-9]+)?|[0-9]+) | [A-Za-z_][0-9A-Za-z_]* | \( ) ) | ( ?<parenthesis> ( ?<= \= | \+ | \* | \( ) (?<op>\() ( ?= ((\.[0-9]+|[0-9]+(\.[0-9]+)?)([eE][-+][0-9]+)?|[0-9]+) | [A-Za-z_][0-9A-Za-z_]* | \( ) ) | ( ?<-parenthesis> ( ?<= ((\.[0-9]+|[0-9]+(\.[0-9]+)?)([eE][-+][0-9]+)?|[0-9]+) | [A-Za-z_][0-9A-Za-z_]* | \) ) (?<op>\)) (?! ((\.[0-9]+|[0-9]+(\.[0-9]+)?)([eE][-+][0-9]+)?|[0-9]+) | [A-Za-z_][0-9A-Za-z_]* ) ) | (?: (?<= \= | \( | \+ | \* ) (?: (?<const>(\.[0-9]+|[0-9]+(\.[0-9]+)?)([eE][-+][0-9]+)?|[0-9]+) | (?<id>[A-Za-z_][0-9A-Za-z_]*) ) ( ?=$ | \) | \+ | \* ) ) )+ ( ? ( parenthesis ) (?!) ) )$
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Description |
I use this expression to parse assignment of arithmetic expression. Supports alphanumeric id, scientific numbers, brackets, +/* operators and assignment.
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Matches |
COST=(PRICE+TAX)*0.98e+4+(1+2)*3|x=a*b+(c+d)*5|t=1
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Non-Matches |
x|1|COST=(PRICE+TAX)*0.98e+4+(1+2)*
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Author |
Rating:
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Bereznikov Alexey
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