diff options
Diffstat (limited to 'pc.y')
| -rw-r--r-- | pc.y | 43 |
1 files changed, 42 insertions, 1 deletions
@@ -4,6 +4,11 @@ #include "y.tab.h" #include "sem_check.h" +/* +TODO: +- Add checkid() to counter mkid() +*/ + %} %union { @@ -46,7 +51,7 @@ %token WHILE DO %token FCALL PCALL -%token ACCESS +%token ARRAY_ACCESS %token LIST @@ -65,15 +70,20 @@ program id_list :ID { + $$ = mkid($1); } |id_list ',' ID { + $$ = mktree(LIST, $1, mkid($3)); } ; var_declarations :var_declarations VAR id_list ':' type ';' { + for(tmp = var_list; tmp != NULL; tmp = tmp->next) { + tmp->type = $5; + } } |/*empty*/ ; @@ -81,18 +91,22 @@ var_declarations type :standard_type { + $$ = $1; } |ARRAY '[' INUM DOTS INUM ']' OF standard_type { + $$ = $ARRAY - $6; } ; standard_type :INT { + $$ = INT; } |REAL { + $$ = REAL; } ; @@ -132,110 +146,137 @@ arguments compound_statement :BEG optional_statments END { + $$ = $2; } ; optional_statements : statement_list { + $$ = $1; } |/*empty*/ { + $$ = NULL; } ; statement_list :statement { + $$ = $1; } |statement_list ';' statement { + $$ = mktree(LIST, $1, $3); } ; statement : var ASSIGNOP expression { + $$ = mktree(ASSIGNOP, $1, $3); } |proc_statement { + $$ = $1; } |compound_statement { + $$ = $1; } |IF expression THEN statement ELSE statement { + $$ = mktree(IF, $2, mktree(THEN, $4, $6)); } |WHILE expression DO statement { + $$ = mktree(WHILE, $2, $4) } ; var :ID { + $$ = mkid($1) } |ID '[' expression ']' { + $$ = mktree(ARRAY_ACCESS, mkid($1), $3); } ; proc_statement :ID { + $$ = mkid($1); } |ID '(' expression_list ')' { + $$ = mktree(PCALL, mkid($1), $3); } ; expression_list :expression { + $$ = $1; } |expression_list ',' expression { + $$ = mktree(LIST, $1, $3); } ; expression :simple_expression { + $$ = $1; } |simple_expression RELOP simple_expression { + $$ = mkop(RELOP, $2, $1, $3); } ; term :factor { + $$ = mktree(LIST, $1, $3); } |term MULOP factor { + $$ = mkop(MULOP, $2, $1, $3); } ; factor :ID { + $$ = mkid($1); } |ID '[' expression ']' { + $$ = mktree(ARRAY_ACCESS, mkid($1), $3) } |ID '(' expression_list ')' { + $$ = mktree(FCALL, mkid($1), $3); } |INUM { + $$ = mkinum($1); } |RNUM { + $$ = mkrnum($1); } | '(' expression ')' { + $$ = $2; } |NOT factor { + $$ = mktree(NOT, $2, NULL); } ; |