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| author | Quentin Carbonneaux <quentin.carbonneaux@yale.edu> | 2015-09-17 19:50:39 -0400 |
|---|---|---|
| committer | Quentin Carbonneaux <quentin.carbonneaux@yale.edu> | 2015-09-17 19:50:39 -0400 |
| commit | 43912f18fc7ca02b875ed3c88ad87bd76d588c47 (patch) | |
| tree | 3c9153716586d58f93fac29f0b2bf969140a9c45 /lisc/parse.c | |
| parent | 4a2c4d63f99ee3a2d7e124c6a979165b71f3367c (diff) | |
| download | roux-43912f18fc7ca02b875ed3c88ad87bd76d588c47.tar.gz | |
parse parameter lists of functions
Diffstat (limited to 'lisc/parse.c')
| -rw-r--r-- | lisc/parse.c | 36 |
1 files changed, 26 insertions, 10 deletions
diff --git a/lisc/parse.c b/lisc/parse.c index 29f5653..7df7c91 100644 --- a/lisc/parse.c +++ b/lisc/parse.c @@ -39,6 +39,8 @@ OpDesc opdesc[NOp] = { [OXCmp] = { "xcmp", 1 }, [OXTest] = { "xtest", 1 }, [OAddr] = { "addr", 0 }, + [OPar] = { "par", 0 }, + [OParc] = { "parc", 0 }, [OArg] = { "arg", 0 }, [OArgc] = { "argc", 0 }, [OCall] = { "call", 0 }, @@ -291,11 +293,15 @@ nextnl() static void expect(int t) { - static char *names[] = { + static char *ttoa[] = { [TLbl] = "label", [TComma] = ",", [TEq] = "=", [TNL] = "newline", + [TLParen] = "(", + [TRParen] = ")", + [TLBrace] = "{", + [TRBrace] = "}", [TEOF] = 0, }; char buf[128], *s1, *s2; @@ -304,8 +310,8 @@ expect(int t) t1 = next(); if (t == t1) return; - s1 = names[t] ? names[t] : "??"; - s2 = names[t1] ? names[t1] : "??"; + s1 = ttoa[t] ? ttoa[t] : "??"; + s2 = ttoa[t1] ? ttoa[t1] : "??"; snprintf(buf, sizeof buf, "%s expected (got %s instead)", s1, s2); err(buf); @@ -394,7 +400,7 @@ parsecls(int *tyn) } static void -parseargl() +parserefl(int arg) { int w, t, ty; Ref r; @@ -411,10 +417,18 @@ parseargl() r = parseref(); if (req(r, R)) err("invalid reference argument"); + if (!arg && rtype(r) != RTmp) + err("invalid function parameter"); if (w == 2) - *curi = (Ins){OArgc, 0, R, {TYP(ty), r}}; + if (arg) + *curi = (Ins){OArgc, 0, R, {TYP(ty), r}}; + else + *curi = (Ins){OParc, 0, r, {TYP(ty)}}; else - *curi = (Ins){OArg, w, R, {r, R}}; + if (arg) + *curi = (Ins){OArg, w, R, {r}}; + else + *curi = (Ins){OPar, w, r, {R}}; curi++; t = next(); if (t == TRParen) @@ -531,7 +545,7 @@ DoOp: } if (op == TCall) { arg[0] = parseref(); - parseargl(); + parserefl(1); expect(TNL); op = OCall; if (w == 2) { @@ -599,20 +613,21 @@ parsefn() if (next() != TGlo) err("function name expected"); - if (nextnl() != TLBrace) - err("function must start with {"); for (i=0; i<NBlk; i++) bmap[i] = 0; for (i=Tmp0; i<NTmp; i++) tmp[i] = (Tmp){.name = ""}; ntmp = Tmp0; ncon = 1; /* first constant must be 0 */ - curi = insb; curb = 0; nblk = 0; + curi = insb; fn = alloc(sizeof *fn); strcpy(fn->name, tokval.str); blink = &fn->start; + parserefl(0); + if (nextnl() != TLBrace) + err("function body must start with {"); ps = PLbl; do ps = parseline(ps); @@ -798,6 +813,7 @@ printfn(Fn *fn, FILE *f) #undef X }; static char prcls[NOp] = { + [OArg] = 1, [OXCmp] = 1, [OXTest] = 1, [OXPush] = 1, |