Implement functions.

[goals.git] / src / lexer.mll

diff --git a/src/lexer.mll b/src/lexer.mll
index 617c10f..66c6b9f 100644 (file)
--- a/src/lexer.mll
+++ b/src/lexer.mll
@@ -34,7 +34,7 @@ let new_line lexbuf =
 let white = [' ' '\t']+
 let newline = '\r' | '\n' | "\r\n"
 let comment = '#' (_#'\n')*
-let id = ['a'-'z' 'A'-'Z' '_'] ['a'-'z' 'A'-'Z' '0'-'9' '_']*
+let id = ['a'-'z' 'A'-'Z' '_'] ['a'-'z' 'A'-'Z' '0'-'9' '_' '-']*
 
 rule read =
     parse
@@ -43,6 +43,7 @@ rule read =
     | newline { new_line lexbuf; read lexbuf }
     | ","     { COMMA }
     | ":"     { COLON }
+    | ";"     { SEMICOLON }
     | "="     { EQUALS }
     | "("     { LEFT_PAREN }
     | ")"     { RIGHT_PAREN }
@@ -51,9 +52,15 @@ rule read =
     | '"'     { read_string (Ast.Substs.create ()) lexbuf }
     | "{"     { read_code (Ast.Substs.create ()) (ref 1) lexbuf }
     | "goal"  { GOAL }
-    | "tactic" { TACTIC_KEYWORD }
+    | "tactic"
+              { TACTIC_KEYWORD }
+    | "function"
+              { FUNCTION }
     | "let"   { LET }
-    | "include" { INCLUDE }
+    | "include"
+              { INCLUDE }
+    | "-include"
+              { OPTINCLUDE }
     | "*" id  { (* NB: The initial '*' is part of the name. *)
                 TACTIC (Lexing.lexeme lexbuf) }
     | id      { ID (Lexing.lexeme lexbuf) }
@@ -106,7 +113,8 @@ and read_string buf =
  *)
 and read_code buf level =
     parse
-    | '{'     { incr level; read_code buf level lexbuf }
+    | '{'     { Ast.Substs.add_char buf '{';
+                incr level; read_code buf level lexbuf }
     | '}'     { decr level;
                 if !level = 0 then CODE (Ast.Substs.get buf)
                 else (