struct Fexpr::Expression

• Fexpr::Expression
• Struct
• Value
• Object

Overview

Represents a single comparison within a filter expression.

An expression consists of:

• A left operand (identifier, number, or text)
• A comparison operation
• A right operand (identifier, number, or text)

Defined in:

fexpr/parser.cr

Constructors

• .new(left : Token = Token.new(TokenType::EOF, ""), operation : SignOperation = SignOperation::None, right : Token = Token.new(TokenType::EOF, ""))

Instance Method Summary

• #left : Token
• #left=(left : Token)
• #operation : SignOperation
• #operation=(operation : SignOperation)
• #right : Token
• #right=(right : Token)
• #zero?

  Returns true if this expression is empty (has no meaningful values).

Constructor Detail

Instance Method Detail