CompileCondition will take the parsed YAML condition and return a compiled condition interface.

CompileExpression will compile the parsed YAML into an Expression that can be evaluated into a bool, float64 or string.

CompileNumExpression will compile the parsed YAML into a NumExpression that can be evaluated.

NewContext creates a new filter.Context from an osmgeojson feature.

NewContextFromProperties will create a context using a set of properties.

CompileError represents an errors during the compiling of conditions orr expressions.

Context is the evaluation context which is a bag of data.

A Filter is a set of matchers and the resulting tag transformation to add to the element properties if the matcher matches.

OutputExpression has the key and expression value for the outputs.

A Condition is something that evaluates to a boolean.

An Expression is something that evaluates to a boolean, number or string, depending on context.

NumExpression is something to evaluates to a number.