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feat: add return stmt, removed func doc

This commit is contained in:
Eatswap 2022-12-12 22:03:04 +08:00
parent 7f79bd7768
commit b48a70d114
Signed by: Eatswap
GPG Key ID: BE661106A1F3FA0B
2 changed files with 17 additions and 10 deletions
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26
DragonLisp.y
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@ -136,6 +136,19 @@ array-ref
: LPAREN AREF IDENTIFIER R-Value RPAREN { std::printf("Parsed array-ref -> ( AREF IDENTIFIER R-Value )\n"); }
;
return-expr
: LPAREN RETURN R-Value RPAREN { std::printf("Parsed return-expr -> ( RETURN R-Value )\n"); }
;
func-body-expr
: return-expr { std::printf("Parsed func-body -> return-expr\n"); }
| R-Value { std::printf("Parsed func-body -> R-Value\n"); }
;
func-body
: func-body-expr { std::printf("Parsed func-body -> func-body-expr\n"); }
| func-body func-body-expr { std::printf("Parsed func-body -> func-body func-body-expr\n"); }
L-Value
: IDENTIFIER { std::printf("Parsed L-Value -> IDENTIFIER\n"); }
| array-ref { std::printf("Parsed L-Value -> array-ref\n"); }
@ -244,18 +257,13 @@ S-Expr-if
;
S-Expr-loop
: LOOP S-Exprs { std::printf("Parsed S-Expr-loop -> LOOP S-Exprs\n"); }
| LOOP FOR IDENTIFIER FROM R-Value TO R-Value DO S-Exprs { std::printf("Parsed S-Expr-loop -> LOOP FOR IDENTIFIER FROM R-Value TO R-Value DO S-Exprs\n"); }
| DOTIMES LPAREN IDENTIFIER R-Value RPAREN S-Exprs { std::printf("Parsed S-Expr-loop -> DOTIMES LPAREN IDENTIFIER R-Value RPAREN S-Exprs\n"); }
: LOOP func-body { std::printf("Parsed S-Expr-loop -> LOOP func-body\n"); }
| LOOP FOR IDENTIFIER FROM R-Value TO R-Value DO func-body { std::printf("Parsed S-Expr-loop -> LOOP FOR IDENTIFIER FROM R-Value TO R-Value DO func-body\n"); }
| DOTIMES LPAREN IDENTIFIER R-Value RPAREN func-body { std::printf("Parsed S-Expr-loop -> DOTIMES LPAREN IDENTIFIER R-Value RPAREN func-body\n"); }
;
func-def
: LPAREN DEFUN IDENTIFIER func-arg-list ignored-func-doc S-Exprs RPAREN { std::printf("Parsed func-def -> DEFUN IDENTIFIER ( identifier-list ) ignored-func-doc S-Exprs\n"); }
;
ignored-func-doc
: %empty { std::printf("Parsed ignored-func-doc -> \n"); }
| STRING { std::printf("Parsed ignored-func-doc -> STRING\n"); }
: LPAREN DEFUN IDENTIFIER func-arg-list func-body RPAREN { std::printf("Parsed func-def -> ( DEFUN IDENTIFIER func-arg-list func-body )\n"); }
;
func-arg-list

1
sample.lisp
View File

@ -21,7 +21,6 @@
(
DeFuN fibonacci (x)
"This function calculates fibonacci numbers."
(
if (<= x 1)
1