46 lines
585 B
Markdown
46 lines
585 B
Markdown
# Regular Expressions for PLATYPUS
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## Comments
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```
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L(COMMENT) = !< [^CR]*CR
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```
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## Keywords
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```
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L(KEYWORD) = PLATYPUS | IF | THEN | ELSE | USING | REPEAT | INPUT | OUTPUT
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```
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## Variable Identifiers
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```
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L(L) = [a-zA-Z]
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L(LoD) = [a-zA-Z0-9]
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L(VID) = AVID | SVID
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L(AVID) = [a-zA-Z]([a-zA-Z0-9])*
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L(SVID) = AVID#
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```
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## Integer Literals
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```
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L(DIL) = 0|([1-9][0-9]*)
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L(NzD) = [1-9]
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L(D) = [0-9]
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L(OD) = [0-7]
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L(OIL) = 0(0|[1-7][0-7]*)
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L(IL) = (DIL | OIL)
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```
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## Floating Point Literal
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```
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L(FLPL) = (0 | [1-9]*).[0-9]*
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```
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## String Literal
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```
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L(STRL) = "([a-ZA-Z_0-9])*"
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``` |