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| author | June McEnroe <june@causal.agency> | 2019-05-18 19:15:12 -0400 |
|---|---|---|
| committer | June McEnroe <june@causal.agency> | 2019-05-18 19:15:12 -0400 |
| commit | da89e0df3c659c5ede5692299404603994429db6 (patch) | |
| tree | 5ae736fa63e11d63684065324246928dc5907f01 | |
| parent | Support simple assignment in order (diff) | |
| download | src-da89e0df3c659c5ede5692299404603994429db6.tar.gz src-da89e0df3c659c5ede5692299404603994429db6.zip | |
Add compound assignment operators to order
| -rw-r--r-- | bin/man1/order.1 | 5 | ||||
| -rw-r--r-- | bin/order.y | 45 |
2 files changed, 37 insertions, 13 deletions
diff --git a/bin/man1/order.1 b/bin/man1/order.1 index 2eb730f1..f042102f 100644 --- a/bin/man1/order.1 +++ b/bin/man1/order.1 @@ -1,4 +1,4 @@ -.Dd May 15, 2019 +.Dd May 18, 2019 .Dt ORDER 1 .Os . @@ -30,5 +30,4 @@ $ order 'a & b << 1' .Nm does not support the .Sy (type) -operator -or the compound assignment operators. +operator. diff --git a/bin/order.y b/bin/order.y index 8700ded4..e6377771 100644 --- a/bin/order.y +++ b/bin/order.y @@ -44,10 +44,8 @@ static int yylex(void); %} -%token Var - %left ',' -%right '=' +%right '=' MulAss DivAss ModAss AddAss SubAss ShlAss ShrAss AndAss XorAss OrAss %right '?' ':' %left Or %left And @@ -60,7 +58,9 @@ static int yylex(void); %left '+' '-' %left '*' '/' '%' %right '!' '~' Inc Dec Sizeof -%left '[' ']' Arr '.' +%left '(' ')' '[' ']' Arr '.' + +%token Var %% @@ -103,10 +103,24 @@ expr: | expr And expr { $$ = fmt("(%s && %s)", $1, $3); } | expr Or expr { $$ = fmt("(%s || %s)", $1, $3); } | expr '?' expr ':' expr { $$ = fmt("(%s ? %s : %s)", $1, $3, $5); } - | expr '=' expr { $$ = fmt("(%s = %s)", $1, $3); } + | expr ass expr %prec '=' { $$ = fmt("(%s %s %s)", $1, $2, $3); } | expr ',' expr { $$ = fmt("(%s, %s)", $1, $3); } ; +ass: + '=' { $$ = "="; } + | MulAss { $$ = "*="; } + | DivAss { $$ = "/="; } + | ModAss { $$ = "%="; } + | AddAss { $$ = "+="; } + | SubAss { $$ = "-="; } + | ShlAss { $$ = "<<="; } + | ShrAss { $$ = ">>="; } + | AndAss { $$ = "&="; } + | XorAss { $$ = "^="; } + | OrAss { $$ = "|="; } + ; + %% #define T(a, b) ((int)(a) << 8 | (int)(b)) @@ -129,7 +143,7 @@ static int yylex(void) { return Var; } - int tok = 0; + int tok; switch (T(input[0], input[1])) { break; case T('-', '>'): tok = Arr; break; case T('+', '+'): tok = Inc; @@ -142,13 +156,24 @@ static int yylex(void) { break; case T('!', '='): tok = Ne; break; case T('&', '&'): tok = And; break; case T('|', '|'): tok = Or; + break; case T('*', '='): tok = MulAss; + break; case T('/', '='): tok = DivAss; + break; case T('%', '='): tok = ModAss; + break; case T('+', '='): tok = AddAss; + break; case T('-', '='): tok = SubAss; + break; case T('&', '='): tok = AndAss; + break; case T('^', '='): tok = XorAss; + break; case T('|', '='): tok = OrAss; + break; default: return *input++; } - if (tok) { - input += 2; - return tok; + input += 2; + + switch (T(tok, input[0])) { + case T(Shl, '='): input++; return ShlAss; + case T(Shr, '='): input++; return ShrAss; } - return *input++; + return tok; } int main(int argc, char *argv[]) { |