diff options
Diffstat (limited to 'demos/sample-files/calc-defs.c')
| -rw-r--r-- | demos/sample-files/calc-defs.c | 40 |
1 files changed, 27 insertions, 13 deletions
diff --git a/demos/sample-files/calc-defs.c b/demos/sample-files/calc-defs.c index 656ab1c..7321a88 100644 --- a/demos/sample-files/calc-defs.c +++ b/demos/sample-files/calc-defs.c @@ -2,12 +2,9 @@ #include "parts/symbol.h" enum symbol { - PLUS = 0, - MINUS, - LPAREN, - RPAREN, - NUM, - END_INPUT, + PLUS, MINUS, TIMES, + LPAREN, RPAREN, + NUM, END_INPUT, EP, E, T, SYMBOLS_END, @@ -20,14 +17,14 @@ IMPLEMENT_FUNCPTR(int, symbol_is_input_end, (symbol s)) { return s == END_INPUT; IMPLEMENT_FUNCPTR(int, symbol_is_valid, (symbol s)) { return s < SYMBOLS_END; } #include "parts/grammar.h" -#define PROD(LHS, _, ...) {LHS, (symbol[]){__VA_ARGS__}, sizeof((symbol[]){__VA_ARGS__})/sizeof(symbol), 0} +#define PROD(LHS, _, ...) {LHS, (symbol[]){__VA_ARGS__}, sizeof((symbol[]){__VA_ARGS__})/sizeof(symbol)} static struct production _grammar[] = { PROD(EP, ->, E, END_INPUT), - PROD(E, -->, E, PLUS, T), - PROD(E, -->, E, MINUS, T), - PROD(E, -->, T), - PROD(T, -->, LPAREN, E, RPAREN), - PROD(T, -->, NUM), + PROD(E, -->, E, PLUS, E), + PROD(E, -->, E, MINUS, E), + PROD(E, -->, E, TIMES, E), + PROD(E, -->, LPAREN, E, RPAREN), + PROD(E, -->, NUM), }; struct production *grammar = _grammar; @@ -38,7 +35,24 @@ char **semantic_action_str = (char *([])){ "v = A(0);", "v = A(0) + A(2);", "v = A(0) - A(2);", - "v = A(0);", + "v = A(0) * A(2);", "v = A(1);", "v = A(0);", }; + +#include "parts/precedence.h" + +struct precedence_def { + int flag; + int *list; + size_t nlist; +}; +#define PREC(f, ...) {f, (int[]){__VA_ARGS__}, sizeof((int[]){__VA_ARGS__})/sizeof(int)} +struct precedence_def _precedence_defs[] = { + PREC(PRECEDENCE_LEFT_ASSOC, MINUS, PLUS), + PREC(PRECEDENCE_LEFT_ASSOC, TIMES), + PREC(PRECEDENCE_LEFT_ASSOC, LPAREN, RPAREN), +}; + +struct precedence_def *precedence_defs = _precedence_defs; +size_t nprecedence_defs = sizeof(_precedence_defs)/sizeof(*_precedence_defs); |