syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"println!(\"cargo:rerun-if-env-changed={}\","}]}
source_snippet:     println!("cargo:rerun-if-env-changed={}", &*ENV_LLVM_PREFIX);
context_before:     // Behavior can be significantly affected by these vars.
context_after:     if let Ok(path) = env::var(&*ENV_LLVM_PREFIX) {