Add more formatting macros to syntax checking (#258)

* make macro regex more readable

* add tests

Author: TheIronBorn

RustEnhanced.sublime-syntax

@@ -162,7 +162,8 @@ contexts:
     - match: '\b[[:lower:]_][[:lower:][:digit:]_]*(?=\()'
       scope: support.function.rust
 
-    - match: '\b((?:format|print|println|panic|format_args|unreachable)!)\s*(\()'
+    # macros which take format specs as the only parameter
+    - match: '\b((?:format(?:_args)?|e?print(?:ln)?|panic|unreachable|unimplemented)!)\s*(\()'
       captures:
         1: support.macro.rust
         2: meta.group.rust punctuation.definition.group.begin.rust
@@ -174,7 +175,8 @@ contexts:
         - match: '(?=\S)'
           set: group-tail
 
-    - match: '\b((?:write|writeln)!)\s*(\()'
+    # macros which take format specs as the second parameter
+    - match: '\b((?:write(?:ln)?|(?:debug_)?assert)!)\s*(\()'
       captures:
         1: support.macro.rust
         2: meta.group.rust punctuation.definition.group.begin.rust
@@ -190,6 +192,11 @@ contexts:
               set: group-tail
         - include: group-tail
 
+    # macros which take format specs as the third parameter
+    # - match: '\b((?:assert_eq|assert_ne|debug_assert_eq|debug_assert_ne)!)\s*(\()'
+    # is more performant as the below
+    # - match: '\b((?:debug_)?assert_(?:eq|ne)!)\s*(\()'
+
     - match: '\b[[:lower:]_][[:lower:][:digit:]_]*!(?=\s*(\(|\{|\[))'
       scope: support.macro.rust
 

syntax_test_rust.rs

@@ -276,14 +276,18 @@ impl fmt::Display for PrintableStruct {
 //                            ^ punctuation.definition.group.end
         write!(f, "{:10}", self.0)
 //                 ^^^^^ constant.other.placeholder
-        write!(f, "{:^10}", self.0)
-//                 ^^^^^^ constant.other.placeholder
-        write!(f, "{:+046.89?}", self.0)
+        eprint!("{:^10}", self.0)
+//      ^^^^^^^ support.macro
+//               ^^^^^^ constant.other.placeholder
+        eprintln!("{:+046.89?}", self.0)
+//      ^^^^^^^^^ support.macro
 //                 ^^^^^^^^^^^ constant.other.placeholder
-        write!(f, "{:-^#10x}", self.0)
-//                 ^^^^^^^^^ constant.other.placeholder
-        write!(f, "{4j:#xf10}", self.0)
-//                 ^^^^^^^^^^ string.quoted.double
+        assert!(true, "{:-^#10x}", self.0)
+//      ^^^^^^^ support.macro
+//                     ^^^^^^^^^ constant.other.placeholder
+        debug_assert!(true, "{4j:#xf10}", self.0)
+//      ^^^^^^^^^^^^^ support.macro
+//                           ^^^^^^^^^^ string.quoted.double
         write!(f, "{{}}", self.0)
 //                 ^^^^ constant.character.escape.rust
         write!(get_writer(), "{}", "{}")
@@ -1045,6 +1049,9 @@ pub fn macro_tests() {
     unreachable!("{:?}", e);
 //  ^^^^^^^^^^^^ support.macro.rust
 //                ^^^^ constant.other.placeholder.rust
+    unimplemented!("{:?}", e);
+//  ^^^^^^^^^^^^^^ support.macro.rust
+//                  ^^^^ constant.other.placeholder.rust
 }
 
 #[derive(Clone)]