go-parse

Simple expression parsers in Go.

Installation

go get github.com/orkes-io/go-parse

Packages

All parsers implemented in this package perform tokenization and produce an Abstract Syntax Tree (AST) of their results, which can be consumed by other functions.

bools

Supports parsing boolean expressions using AND, OR, and NOT, according to the following grammar. The syntax used for each operator can be configured at runtime.

    expr     -> and
    and      -> or 'AND' and | or
    or       -> not 'OR' or | not
    not      -> 'NOT' parens | parens
    parens   -> '(' expr ')' | unparsed
    unparsed -> '.*

comp

Supports parsing comparison expressions using equality and comparison operators, according to the following grammar. The syntax used for each operator can be configured at runtime.

    expr    -> equal
    equal   -> ordinal ( '!=' | '==' ) ordinal | ordinal
    ordinal -> term ( '>=' | '>' | '<' | '<=' ) term | term
    term    -> '(' expr ')' | unparsed
    unparsed -> .*