arrays!!!!!

src/main.rs

@@ -20,6 +20,7 @@ use std::fs::File;
 use std::io::Read;
 use std::path::Path;
 use std::process;
+use std::str::FromStr;
 
 use toml::Value;
 
@@ -27,7 +28,7 @@ fn main() {
   let mut arguments: Vec<String> = env::args().collect();
   let argv0 = arguments.remove(0);
   if arguments[1].is_empty() {
-    println!("Usage: {} [table...].[value] [file...]", argv0);
+    eprintln!("Usage: {} [table...].[value] [file...]", argv0);
     process::exit(64); // sysexits(3) EX_USAGE
   }
   let input = &arguments[1];
@@ -38,7 +39,22 @@ fn main() {
     File::open(file).unwrap().read_to_string(&mut content).unwrap();
   } else { content = input.to_string(); }
 
-  let tabkey: Vec<&str> = arguments[0].split(".").collect();
+  let mut tabkey: Vec<&str> = arguments[0].split(".").collect();
+  let mut indexvec: Vec<&str> = tabkey[1].split(&['[', ']'][..]).collect();
+
+  tabkey[1] = indexvec.remove(0);
+  let mut index: usize = 0;
+  if ! indexvec.is_empty() {
+    let istr = indexvec.remove(0);
+    match usize::from_str(istr) {
+      Ok(i) => index = i,
+      Err(_) => {
+        eprintln!("{}: {}: Cannot index by given value.", argv0, istr);
+        process::exit(65); // sysexits(3) EX_DATAERR
+      },
+    };
+  }
+
   let mut root = content.parse::<Value>().unwrap();
   
   let mut out = String::new();
@@ -49,26 +65,60 @@ fn main() {
       Some(value) => {
         match value {
           // TODO: Implement other type parsing
-          Value::Array(_array) => {}, 
+          Value::Array(array) => {
+            match valiter.peek() {
+              Some(_) => {
+                eprintln!("{}: {}: Not a table.", argv0, item);
+                process::exit(65); // sysexits(3) EX_DATAERR
+              },
+              None => { 
+                match array.get(index) {
+                  Some(element) => {
+                    match element.as_str() {
+                      Some(val) => out.push_str(val),
+                      None => {
+                        eprintln!(
+                          "{}: {:?}: No value at given index.", argv0, index
+                        );
+                        process::exit(65); // sysexits(3) EX_DATAERR
+                      },
+                    };
+                  },
+                  None => {
+                    eprintln!(
+                      "{}: {:?}: No value at given index.", argv0, index
+                    );
+                    process::exit(65); // sysexits(3) EX_DATAERR
+                  },
+                };
+              },
+            };
+          }, 
           Value::Boolean(_boolean) => {}, 
           Value::Datetime(_datetime) => {}, 
           Value::Float(_float) => {},
           Value::Integer(_int) => {},
           Value::String(string) => {
             match valiter.peek() {
-              Some(next) => {
-                println!("{}: {}: Not a table.", argv0, item);
+              Some(_) => {
+                eprintln!("{}: {}: Not a table.", argv0, item);
                 process::exit(65); // sysexits(3) EX_DATAERR
               },
               None => out.push_str(string.as_str()),
             };
-            break
-          }
-          Value::Table(table) => root = toml::Value::Table(table.to_owned()),
+          },
+          Value::Table(table) => {
+            match valiter.peek() {
+              Some(_) => {
+                root = toml::Value::Table(table.to_owned());
+              },
+              None => {}, // out.push_str(table.as_str()),
+            };
+          },
         };
       },
       None => {
-        println!("{}: {}: No such table or key.", argv0, item);
+        eprintln!("{}: {}: No such table or key.", argv0, item);
         process::exit(65); // sysexits(3) EX_DATAERR
       },
     };