- flex
- bison
cd scanner-parser
make
./parser test.wyj
cd symbolTable
make
./parser test.wyjcd scanner-parser
make
./parser test.wyjOutput the lexical unit(as a turple)
(class, KEY_CLASS)
(test, IDENTIFIER)
(\n, EOL)
({, SP_OPEN_BRACE)
(\n, EOL)
(int, TYPE_INTEGER)
(m, IDENTIFIER)
(;, SP_SEMICOLON)
(\n, EOL)
(int, TYPE_INTEGER)
(a, IDENTIFIER)
(;, SP_SEMICOLON)
(\n, EOL)
(void, TYPE_VOID)
(dispaly, IDENTIFIER)
((, SP_OPEN_PARENTHESE)
(int, TYPE_INTEGER)
(a, IDENTIFIER)
(,, SP_COMMA)
(int, TYPE_INTEGER)
(b, IDENTIFIER)
(), SP_CLOSE_PARENTHESE)
(\n, EOL)
({, SP_OPEN_BRACE)
(\n, EOL)
(int, TYPE_INTEGER)
(x, IDENTIFIER)
(;, SP_SEMICOLON)
(\n, EOL)
(float, TYPE_FLOAT)
(f, IDENTIFIER)
(;, SP_SEMICOLON)
(\n, EOL)
(bool, TYPE_BOOL)
(b, IDENTIFIER)
(;, SP_SEMICOLON)
(\n, EOL)
(bool, TYPE_BOOL)
(d, IDENTIFIER)
(;, SP_SEMICOLON)
(\n, EOL)
(bool, TYPE_BOOL)
(e, IDENTIFIER)
(;, SP_SEMICOLON)
(\n, EOL)
(string, TYPE_STRING)
(s, IDENTIFIER)
(;, SP_SEMICOLON)
(\n, EOL)
(x, IDENTIFIER)
(=, OP_ASSIGN)
(-211, CONSTANT_INT_D)
(;, SP_SEMICOLON)
(\n, EOL)
(x, IDENTIFIER)
(=, OP_ASSIGN)
(-0x1a, CONSTANT_INT_H)
(;, SP_SEMICOLON)
(\n, EOL)
(f, IDENTIFIER)
(=, OP_ASSIGN)
(0.001, CONSTANT_FLOAT)
(;, SP_SEMICOLON)
(\n, EOL)
(f, IDENTIFIER)
(=, OP_ASSIGN)
(-1.2e-1, CONSTANT_FLOAT_SC)
(;, SP_SEMICOLON)
(\n, EOL)
(b, IDENTIFIER)
(=, OP_ASSIGN)
(true, CONSTANT_BOOL)
(;, SP_SEMICOLON)
(\n, EOL)
(s, IDENTIFIER)
(=, OP_ASSIGN)
("just test", CONSTANT_STRING)
(;, SP_SEMICOLON)
(\n, EOL)
(s, IDENTIFIER)
(=, OP_ASSIGN)
(null, CONSTANT_NULL)
(;, SP_SEMICOLON)
(\n, EOL)
(x, IDENTIFIER)
(=, OP_ASSIGN)
(a, IDENTIFIER)
(+, OP_ADD)
(b, IDENTIFIER)
(;, SP_SEMICOLON)
(\n, EOL)
(if, KEY_IF)
((, SP_OPEN_PARENTHESE)
(a, IDENTIFIER)
(==, OP_EQUAL)
(b, IDENTIFIER)
(), SP_CLOSE_PARENTHESE)
(\n, EOL)
({, SP_OPEN_BRACE)
(\n, EOL)
(if, KEY_IF)
((, SP_OPEN_PARENTHESE)
(c, IDENTIFIER)
(==, OP_EQUAL)
(d, IDENTIFIER)
(), SP_CLOSE_PARENTHESE)
(\n, EOL)
(Print, KEY_PRINT)
((, SP_OPEN_PARENTHESE)
("ifif", CONSTANT_STRING)
(), SP_CLOSE_PARENTHESE)
(;, SP_SEMICOLON)
(\n, EOL)
(else, KEY_ELSE)
(\n, EOL)
(Print, KEY_PRINT)
((, SP_OPEN_PARENTHESE)
("ifelse", CONSTANT_STRING)
(), SP_CLOSE_PARENTHESE)
(;, SP_SEMICOLON)
(\n, EOL)
(}, SP_CLOSE_BRACE)
(\n, EOL)
(else, KEY_ELSE)
(\n, EOL)
({, SP_OPEN_BRACE)
(\n, EOL)
(if, KEY_IF)
((, SP_OPEN_PARENTHESE)
(c, IDENTIFIER)
(==, OP_EQUAL)
(d, IDENTIFIER)
(), SP_CLOSE_PARENTHESE)
(\n, EOL)
(Print, KEY_PRINT)
((, SP_OPEN_PARENTHESE)
("elseif", CONSTANT_STRING)
(), SP_CLOSE_PARENTHESE)
(;, SP_SEMICOLON)
(\n, EOL)
(else, KEY_ELSE)
(\n, EOL)
(Print, KEY_PRINT)
((, SP_OPEN_PARENTHESE)
("elseelse", CONSTANT_STRING)
(), SP_CLOSE_PARENTHESE)
(;, SP_SEMICOLON)
(\n, EOL)
(}, SP_CLOSE_BRACE)
(\n, EOL)
(}, SP_CLOSE_BRACE)
(\n, EOL)
(}, SP_CLOSE_BRACE)
(\n, EOL)
cd scanner-parser
make
./parser test.wyjOutput the abstract grammar tree
Program --> at line: 1
ClassDef --> at line: 1
KEY_CLASS --> at line: 1
IDENTIFIER: test
{ --> at line: 2
Fields --> at line: 3
VariableDef --> at line: 3
Variable --> at line: 3
Type --> at line: 3
TYPE_INTEGER --> at line: 3
IDENTIFIER: m
; --> at line: 3
Fields --> at line: 4
VariableDef --> at line: 4
Variable --> at line: 4
Type --> at line: 4
TYPE_INTEGER --> at line: 4
IDENTIFIER: a
; --> at line: 4
Fields --> at line: 5
FunctionDef --> at line: 5
Type --> at line: 5
TYPE_VOID --> at line: 5
IDENTIFIER: dispaly
( --> at line: 5
Formals --> at line: 5
FormalList --> at line: 5
FormalList --> at line: 5
Variable --> at line: 5
Type --> at line: 5
TYPE_INTEGER --> at line: 5
IDENTIFIER: a
, --> at line: 5
Variable --> at line: 5
Type --> at line: 5
TYPE_INTEGER --> at line: 5
IDENTIFIER: b
) --> at line: 5
StmtBlock --> at line: 6
{ --> at line: 6
StmtList --> at line: 7
Stmt --> at line: 7
VariableDef --> at line: 7
Variable --> at line: 7
Type --> at line: 7
TYPE_INTEGER --> at line: 7
IDENTIFIER: x
; --> at line: 7
StmtList --> at line: 8
Stmt --> at line: 8
VariableDef --> at line: 8
Variable --> at line: 8
Type --> at line: 8
TYPE_FLOAT --> at line: 8
IDENTIFIER: f
; --> at line: 8
StmtList --> at line: 9
Stmt --> at line: 9
VariableDef --> at line: 9
Variable --> at line: 9
Type --> at line: 9
TYPE_BOOL --> at line: 9
IDENTIFIER: b
; --> at line: 9
StmtList --> at line: 10
Stmt --> at line: 10
VariableDef --> at line: 10
Variable --> at line: 10
Type --> at line: 10
TYPE_BOOL --> at line: 10
IDENTIFIER: d
; --> at line: 10
StmtList --> at line: 11
Stmt --> at line: 11
VariableDef --> at line: 11
Variable --> at line: 11
Type --> at line: 11
TYPE_BOOL --> at line: 11
IDENTIFIER: e
; --> at line: 11
StmtList --> at line: 12
Stmt --> at line: 12
VariableDef --> at line: 12
Variable --> at line: 12
Type --> at line: 12
TYPE_STRING --> at line: 12
IDENTIFIER: s
; --> at line: 12
StmtList --> at line: 13
Stmt --> at line: 13
SimpleStmt --> at line: 13
LValue --> at line: 13
IDENTIFIER: x
= --> at line: 13
Expr --> at line: 13
Constant --> at line: 13
CONSTANT_INT_D --> at line: 13
; --> at line: 13
StmtList --> at line: 14
Stmt --> at line: 14
SimpleStmt --> at line: 14
LValue --> at line: 14
IDENTIFIER: x
= --> at line: 14
Expr --> at line: 14
Constant --> at line: 14
CONSTANT_INT_H: -26
; --> at line: 14
StmtList --> at line: 15
Stmt --> at line: 15
SimpleStmt --> at line: 15
LValue --> at line: 15
IDENTIFIER: f
= --> at line: 15
Expr --> at line: 15
Constant --> at line: 15
CONSTANT_FLOAT: 0.001
; --> at line: 15
StmtList --> at line: 16
Stmt --> at line: 16
SimpleStmt --> at line: 16
LValue --> at line: 16
IDENTIFIER: f
= --> at line: 16
Expr --> at line: 16
Constant --> at line: 16
CONSTANT_FLOAT_SC: -0.12
; --> at line: 16
StmtList --> at line: 17
Stmt --> at line: 17
SimpleStmt --> at line: 17
LValue --> at line: 17
IDENTIFIER: b
= --> at line: 17
Expr --> at line: 17
Constant --> at line: 17
CONSTANT_BOOL: true
; --> at line: 17
StmtList --> at line: 18
Stmt --> at line: 18
SimpleStmt --> at line: 18
LValue --> at line: 18
IDENTIFIER: s
= --> at line: 18
Expr --> at line: 18
Constant --> at line: 18
CONSTANT_STRING: "just test"
; --> at line: 18
StmtList --> at line: 19
Stmt --> at line: 19
SimpleStmt --> at line: 19
LValue --> at line: 19
IDENTIFIER: s
= --> at line: 19
Expr --> at line: 19
Constant --> at line: 19
CONSTANT_NULL: null
; --> at line: 19
StmtList --> at line: 20
Stmt --> at line: 20
SimpleStmt --> at line: 20
LValue --> at line: 20
IDENTIFIER: x
= --> at line: 20
Expr --> at line: 20
Expr --> at line: 20
LValue --> at line: 20
IDENTIFIER: a
+ --> at line: 20
Expr --> at line: 20
LValue --> at line: 20
IDENTIFIER: b
; --> at line: 20
StmtList --> at line: 21
Stmt --> at line: 21
IfStmt --> at line: 21
KEY_IF --> at line: 21
( --> at line: 21
BoolExpr --> at line: 21
Expr --> at line: 21
Expr --> at line: 21
LValue --> at line: 21
IDENTIFIER: a
OP_EQUAL --> at line: 21
Expr --> at line: 21
LValue --> at line: 21
IDENTIFIER: b
) --> at line: 21
Stmt --> at line: 22
StmtBlock --> at line: 22
{ --> at line: 22
StmtList --> at line: 23
Stmt --> at line: 23
IfStmt --> at line: 23
KEY_IF --> at line: 23
( --> at line: 23
BoolExpr --> at line: 23
Expr --> at line: 23
Expr --> at line: 23
LValue --> at line: 23
IDENTIFIER: c
OP_EQUAL --> at line: 23
Expr --> at line: 23
LValue --> at line: 23
IDENTIFIER: d
) --> at line: 23
Stmt --> at line: 24
PrintStmt --> at line: 24
KEY_PRINT --> at line: 24
( --> at line: 24
ExprList --> at line: 24
Expr --> at line: 24
Constant --> at line: 24
CONSTANT_STRING: "ifif"
) --> at line: 24
; --> at line: 24
KEY_ELSE --> at line: 25
Stmt --> at line: 26
PrintStmt --> at line: 26
KEY_PRINT --> at line: 26
( --> at line: 26
ExprList --> at line: 26
Expr --> at line: 26
Constant --> at line: 26
CONSTANT_STRING: "ifelse"
) --> at line: 26
; --> at line: 26
StmtList: ε
} --> at line: 27
KEY_ELSE --> at line: 28
Stmt --> at line: 29
StmtBlock --> at line: 29
{ --> at line: 29
StmtList --> at line: 30
Stmt --> at line: 30
IfStmt --> at line: 30
KEY_IF --> at line: 30
( --> at line: 30
BoolExpr --> at line: 30
Expr --> at line: 30
Expr --> at line: 30
LValue --> at line: 30
IDENTIFIER: c
OP_EQUAL --> at line: 30
Expr --> at line: 30
LValue --> at line: 30
IDENTIFIER: d
) --> at line: 30
Stmt --> at line: 31
PrintStmt --> at line: 31
KEY_PRINT --> at line: 31
( --> at line: 31
ExprList --> at line: 31
Expr --> at line: 31
Constant --> at line: 31
CONSTANT_STRING: "elseif"
) --> at line: 31
; --> at line: 31
KEY_ELSE --> at line: 32
Stmt --> at line: 33
PrintStmt --> at line: 33
KEY_PRINT --> at line: 33
( --> at line: 33
ExprList --> at line: 33
Expr --> at line: 33
Constant --> at line: 33
CONSTANT_STRING: "elseelse"
) --> at line: 33
; --> at line: 33
StmtList: ε
} --> at line: 34
StmtList: ε
} --> at line: 35
Fields: ε
} --> at line: 36
ClassDefList: ε
cd semantic
make
./parser test.wyjOutput the symbol table
>>>>>>>> Symbol Table <<<<<<<<<
--------- class table ----------
name type
--------------------------------
test class
--------------------------------
--------- variable table ---------
name type
----------------------------------
m int
a int
a int
b int
x int
f float
b bool
d bool
e bool
s string
----------------------------------
-------------------- function table -----------------------
name type parameter list(name: type)
-----------------------------------------------------------
dispaly void b: int, a: int
-----------------------------------------------------------
single scope.(lazy...)
use the grammar tree, to detect type conflict.
cd semantic
make
./parser test.wyj
./parser error.wyj// error code sample, in error.wyj:
class A {
int num;
string foo(string str)
{
Print(str);
return str;
}
float dispaly(int a, int b)
{
int x;
int i;
float f;
x = true; // semantic error 1
f = 3.14;
i = f; // semantic error 2
num = foo("zhangming"); // semantic error 3
return f;
}
}
Output(you'll find 3 semantic errors in error.wyj):
Semantic Error at line 13: constant type is not satisfied with x
Semantic Error at line 15: f type is not satisfied with i
Semantic Error at line 16: function foo type is not satisfied with num
use TAC code
cd intercode
make
./parser testhere is the sample code
class A
{
int display(int num1, int num2)
{
int height;
int width;
int size;
height = 20;
width = 30;
size = height * width;
int a;
a = height;
int b;
b = display(1, 2);
return num1;
}
}
here is the inter code
CLASS A
FUNCTION display :
PARAMETER num2
PARAMETER num1
height := #20
width := #30
size := height * height
a := height
b := CALL display
RETURN num1
loading...
feel easy to
$ make cleanMIT License
Copyright (c) 2018 Ming Zhang
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.