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| author | Jon Dufresne <jon.dufresne@gmail.com> | 2019-10-31 21:10:28 -0700 |
|---|---|---|
| committer | Paul McGuire <ptmcg@users.noreply.github.com> | 2019-10-31 23:10:28 -0500 |
| commit | 53d1b4a6f48a53c4c4ec4ac7031362b691c0366d (patch) | |
| tree | 088ad3cf3561b78a00af4fb2fd474f4a2b8ca70c /examples/oc.py | |
| parent | 41752aa52cc97c710474bb2972cceab057b52ad4 (diff) | |
| download | pyparsing-git-53d1b4a6f48a53c4c4ec4ac7031362b691c0366d.tar.gz | |
Blacken the project (#141)
Diffstat (limited to 'examples/oc.py')
| -rw-r--r-- | examples/oc.py | 75 |
1 files changed, 45 insertions, 30 deletions
diff --git a/examples/oc.py b/examples/oc.py index c8b95b1..f19a2b0 100644 --- a/examples/oc.py +++ b/examples/oc.py @@ -71,13 +71,15 @@ The following is a description of the OC grammar: """
from pyparsing import *
+
ParserElement.enablePackrat()
-LPAR,RPAR,LBRACK,RBRACK,LBRACE,RBRACE,SEMI,COMMA = map(Suppress, "()[]{};,")
-INT, CHAR, WHILE, DO, IF, ELSE, RETURN = map(Keyword,
- "int char while do if else return".split())
+LPAR, RPAR, LBRACK, RBRACK, LBRACE, RBRACE, SEMI, COMMA = map(Suppress, "()[]{};,")
+INT, CHAR, WHILE, DO, IF, ELSE, RETURN = map(
+ Keyword, "int char while do if else return".split()
+)
-NAME = Word(alphas+"_", alphanums+"_")
+NAME = Word(alphas + "_", alphanums + "_")
integer = Regex(r"[+-]?\d+")
char = Regex(r"'.'")
string_ = dblQuotedString
@@ -86,19 +88,20 @@ TYPE = Group((INT | CHAR) + ZeroOrMore("*")) expr = Forward()
func_call = Group(NAME + LPAR + Group(Optional(delimitedList(expr))) + RPAR)
operand = func_call | NAME | integer | char | string_
-expr <<= (infixNotation(operand,
+expr <<= infixNotation(
+ operand,
[
- (oneOf('! - *'), 1, opAssoc.RIGHT),
- (oneOf('++ --'), 1, opAssoc.RIGHT),
- (oneOf('++ --'), 1, opAssoc.LEFT),
- (oneOf('* / %'), 2, opAssoc.LEFT),
- (oneOf('+ -'), 2, opAssoc.LEFT),
- (oneOf('< == > <= >= !='), 2, opAssoc.LEFT),
- (Regex(r'(?<!=)=(?!=)'), 2, opAssoc.LEFT),
- ]) +
- Optional( LBRACK + expr + RBRACK |
- LPAR + Group(Optional(delimitedList(expr))) + RPAR )
- )
+ (oneOf("! - *"), 1, opAssoc.RIGHT),
+ (oneOf("++ --"), 1, opAssoc.RIGHT),
+ (oneOf("++ --"), 1, opAssoc.LEFT),
+ (oneOf("* / %"), 2, opAssoc.LEFT),
+ (oneOf("+ -"), 2, opAssoc.LEFT),
+ (oneOf("< == > <= >= !="), 2, opAssoc.LEFT),
+ (Regex(r"(?<!=)=(?!=)"), 2, opAssoc.LEFT),
+ ],
+) + Optional(
+ LBRACK + expr + RBRACK | LPAR + Group(Optional(delimitedList(expr))) + RPAR
+)
stmt = Forward()
@@ -107,34 +110,46 @@ whilestmt = WHILE - LPAR + expr + RPAR + stmt dowhilestmt = DO - stmt + WHILE + LPAR + expr + RPAR + SEMI
returnstmt = RETURN - expr + SEMI
-stmt << Group( ifstmt |
- whilestmt |
- dowhilestmt |
- returnstmt |
- expr + SEMI |
- LBRACE + ZeroOrMore(stmt) + RBRACE |
- SEMI)
+stmt << Group(
+ ifstmt
+ | whilestmt
+ | dowhilestmt
+ | returnstmt
+ | expr + SEMI
+ | LBRACE + ZeroOrMore(stmt) + RBRACE
+ | SEMI
+)
vardecl = Group(TYPE + NAME + Optional(LBRACK + integer + RBRACK)) + SEMI
arg = Group(TYPE + NAME)
body = ZeroOrMore(vardecl) + ZeroOrMore(stmt)
-fundecl = Group(TYPE + NAME + LPAR + Optional(Group(delimitedList(arg))) + RPAR +
- LBRACE + Group(body) + RBRACE)
+fundecl = Group(
+ TYPE
+ + NAME
+ + LPAR
+ + Optional(Group(delimitedList(arg)))
+ + RPAR
+ + LBRACE
+ + Group(body)
+ + RBRACE
+)
decl = fundecl | vardecl
program = ZeroOrMore(decl)
program.ignore(cStyleComment)
# set parser element names
-for vname in ("ifstmt whilestmt dowhilestmt returnstmt TYPE "
- "NAME fundecl vardecl program arg body stmt".split()):
+for vname in (
+ "ifstmt whilestmt dowhilestmt returnstmt TYPE "
+ "NAME fundecl vardecl program arg body stmt".split()
+):
v = vars()[vname]
v.setName(vname)
-#~ for vname in "fundecl stmt".split():
- #~ v = vars()[vname]
- #~ v.setDebug()
+# ~ for vname in "fundecl stmt".split():
+# ~ v = vars()[vname]
+# ~ v.setDebug()
test = r"""
/* A factorial program */
|