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| author | franck cuny <franck@fcuny.net> | 2020-01-11 14:26:19 +0100 |
|---|---|---|
| committer | franck cuny <franck@fcuny.net> | 2020-01-11 14:26:19 +0100 |
| commit | 2c4068a5be7f60e8d0376720f70791d23a8c3ef1 (patch) | |
| tree | 3ee85e9a89bfe3e33a1139e9c557e198df446fef /users | |
| parent | token: rewrite documentation for `LookupIdent`. (diff) | |
| download | world-2c4068a5be7f60e8d0376720f70791d23a8c3ef1.tar.gz | |
token: support more keywords
Add support for a few more keywords (`true`, `false`, `if`, `else`, `return`). All keywords are grouped together in the constant declaration.
Diffstat (limited to 'users')
| -rw-r--r-- | users/fcuny/exp/monkey/pkg/token/token.go | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/users/fcuny/exp/monkey/pkg/token/token.go b/users/fcuny/exp/monkey/pkg/token/token.go index 6937595..a211c55 100644 --- a/users/fcuny/exp/monkey/pkg/token/token.go +++ b/users/fcuny/exp/monkey/pkg/token/token.go @@ -24,8 +24,14 @@ const ( LBRACE = "{" RBRACE = "}" + // The following tokens are keywords FUNCTION = "FUNCTION" LET = "LET" + TRUE = "TRUE" + FALSE = "FALSE" + IF = "IF" + ELSE = "ELSE" + RETURN = "RETURN" // The following tokens are for operators ASSIGN = "=" @@ -40,8 +46,13 @@ const ( // List of our keywords for the language var keywords = map[string]TokenType{ - "fn": FUNCTION, - "let": LET, + "fn": FUNCTION, + "let": LET, + "true": TRUE, + "false": FALSE, + "if": IF, + "else": ELSE, + "return": RETURN, } // LookupIdent returns the token type for a given identifier. |