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cobol-interpreter-lab
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mathematical expression

This commit is contained in:
vel 2024-11-14 11:12:37 -08:00
parent 2855f404a3
commit fc6c46c8b8
Signed by: velvox
GPG Key ID: 59D9762F674151DF
2 changed files with 10 additions and 0 deletions
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1
lab-5/expr.c
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@ -149,6 +149,7 @@ void stmt_print(struct stmt *s) {
break;
// we haven't implemented sections yet
case STMT_SECTION:
printf("section\n");
break;
}

9
lab-5/parser.bison
View File

@ -145,14 +145,20 @@ term : mathmaticalexpr
{$$ = $1;}
;
math_op : TOKEN_ADD
{$$ = expr_create(EXPR_ADD, NULL, NULL);}
| TOKEN_SUB
{$$ = expr_create(EXPR_SUBTRACT, NULL, NULL);}
| TOKEN_MULTIPLY
{$$ = expr_create(EXPR_MULTIPLY, NULL, NULL);}
| TOKEN_DIVIDE
{$$ = expr_create(EXPR_DIVIDE, NULL, NULL);}
| TOKEN_EXPONENTIAL
{$$ = expr_create(EXPR_EXPONENTIAL, NULL, NULL);}
;
mathmaticalexpr : type_expr
{$$ = $1;}
| mathmaticalexpr math_op term
{$$ = expr_create($2->kind, $1, $3);}
| container_expr
{$$ = $1;}
| type_expr container_expr
@ -161,8 +167,11 @@ mathmaticalexpr : type_expr
container_expr : TOKEN_LEFT_PARENTHESIS mathmaticalexpr TOKEN_RIGHT_PARENTHESIS
;
booleanexpr : mathmaticalexpr TOKEN_LESS_THAN term
{$$ = expr_create(EXPR_LESS_THAN, $1, $3);}
| mathmaticalexpr TOKEN_GREATER_THAN term
{$$ = expr_create(EXPR_GREATER_THAN, $1, $3);}
| mathmaticalexpr TOKEN_EQUAL term
{$$ = expr_create(EXPR_EQUAL, $1, $3);}
;
type_expr : TOKEN_IDENT
{$$ = expr_create_name(yytext);}