65 lines
1.6 KiB
Plaintext
65 lines
1.6 KiB
Plaintext
Language "IBAFlang"
|
|
|
|
# Statements
|
|
|
|
Syntax Stmt: statement ::= '{' statement* '}'
|
|
| 'print' '(' exp ')' ';'
|
|
| type id ';'
|
|
| type id '=' exp ';'
|
|
| id '=' exp ';'
|
|
|
|
Syntax Typ:type ::= 'int'
|
|
| 'bool'
|
|
| id
|
|
|
|
|
|
Semantics execute[[ Stmt*:statement* ]] : => null-type
|
|
|
|
Rule execute[[ '{' Stmt* '}' ]] = scope(collateral collect-declared-vars[[ Stmt* ]], execute[[ Stmt* ]])
|
|
Rule execute[[ 'print' '(' Exp ')' ';' ]] = print eval-exp[[ Exp ]]
|
|
Rule execute[[ Typ Id ';' ]] = null
|
|
Rule execute[[ Typ Id '=' Exp ';' ]] = assign(bound id[[ Id ]], eval-exp[[ Exp ]])
|
|
Rule execute[[ Id '=' Exp ';' ]] = assign(bound id[[ Id ]], eval-exp[[ Exp ]])
|
|
|
|
Rule execute[[ ]] = null
|
|
Rule execute[[ Stmt Stmt+ ]] = sequential(execute[[ Stmt ]], execute[[ Stmt+ ]])
|
|
|
|
|
|
|
|
|
|
# Handling variable declarations
|
|
|
|
Semantics collect-declared-vars[[ Stmt*:statement* ]] : (=>environments)+
|
|
|
|
Rule collect-declared-vars[[ Typ Id '=' Exp ';' ]] =
|
|
bind(
|
|
\"Id\",
|
|
allocate-initialised-variable(
|
|
integers, //TODO: use type
|
|
0 //TODO: use correct default value for type
|
|
)
|
|
)
|
|
Rule collect-declared-vars[[ Typ Id ';' ]] =
|
|
bind(
|
|
\"Id\",
|
|
allocate-initialised-variable(
|
|
integers, //TODO: use type
|
|
0 //TODO: use correct default value for type
|
|
)
|
|
)
|
|
Rule collect-declared-vars[[ ]] = map()
|
|
Rule collect-declared-vars[[ Stmt ]] = map()
|
|
Rule collect-declared-vars[[ Stmt1 Stmt2 Stmt* ]] = collect-declared-vars[[ Stmt1 ]], collect-declared-vars[[ Stmt2 ]], collect-declared-vars[[ Stmt* ]]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|