pip_services3_expressions.calculator.parsers package

Submodules

Module contents

class pip_services3_expressions.calculator.parsers.ExpressionParser

Bases: object

Implements an expression parser class.

clear(): Clears parsing results.

property expression: The expression string.

property initial_tokens: The list of original expression tokens.

property original_tokens

parse_string(expression: str)

Sets a new expression string and parses it into internal byte code.

Parameters: expression – A new expression string.

parse_tokens(tokens: List[pip_services3_expressions.tokenizers.Token.Token])

property result_tokens: The list of parsed expression tokens.

property variable_names: The list of found variable names.

class pip_services3_expressions.calculator.parsers.ExpressionToken(type: pip_services3_expressions.calculator.parsers.ExpressionTokenType.ExpressionTokenType, value: pip_services3_expressions.variants.Variant.Variant, line: int, column: int)

Bases: object

Defines an expression token holder.

property column: The column number where the token is.

property line: The line number where the token is.

property type: The type of this token.

property value

class pip_services3_expressions.calculator.parsers.ExpressionTokenType(value)

Bases: enum.Enum

Define types of expression tokens.

And = 19

Comma = 32

Constant = 36

Element = 25

Equal = 11

EqualLess = 16

EqualMore = 15

Function = 34

In = 23

Is = 22

IsNotNull = 31

IsNull = 30

LeftBrace = 1

LeftSquareBrace = 3

Less = 14

Like = 28

Minus = 6

More = 13

Not = 27

NotEqual = 12

NotIn = 24

NotLike = 29

Null = 26

Or = 20

Percent = 9

Plus = 5

Power = 10

RightBrace = 2

RightSquareBrace = 4

ShiftLeft = 17

ShiftRight = 18

Slash = 8

Star = 7

Unary = 33

Unknown = 0

Variable = 35

Xor = 21