mapbox-expressions-to-sql

将Mapbox GL样式规范中的决策表达式转换为SQL WHERE子句条件。

文档

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用法

将以下内容添加到您的Cargo.toml

[dependencies]
mapbox_expressions_to_sql = "0.1"

并将以下内容添加到您的crate根目录

extern crate mapbox_expressions_to_sql;

示例

extern crate mapbox_expressions_to_sql;
use mapbox_expressions_to_sql::parse;

assert_eq!(parse(r#"["has", "key"]"#).unwrap(), "key IS NOT NULL");

assert_eq!(parse(r#"["==", "key", 42]"#).unwrap(), "key = 42");

assert_eq!(parse(r#"["in", "key", "v0", "v1", "v2"]"#).unwrap(), "key IN ('v0', 'v1', 'v2')");

assert_eq!(parse(r#"["all", ["==", "key0", "value0"], ["==", "key1", "value1"]]"#).unwrap(), "key0 = 'value0' AND key1 = 'value1'");

更多示例，请参阅测试