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Add the First/Second/Third/Fourth/Last syntactic sugar and the

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~N/~~N forms of "back"
This commit is contained in:
Dianne Skoll
2022-03-11 20:53:52 -05:00
parent c06c65acf1
commit e1fa11c94c
6 changed files with 237 additions and 7 deletions
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src/token.c
+19 -5
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@@ -43,30 +43,34 @@ Token TokArray[] = {
{ "at", 2, T_At, 0 },
{ "august", 3, T_Month, 7 },
{ "banner", 3, T_Banner, 0 },
{ "before", 3, T_Skip, BEFORE_SKIP },
{ "before", 3, T_Skip, BEFORE_SKIP },
{ "cal", 3, T_RemType, CAL_TYPE },
{ "clear-omit-context", 5, T_Clr, 0 },
{ "debug", 5, T_Debug, 0 },
{ "debug", 5, T_Debug, 0 },
{ "december", 3, T_Month, 11 },
{ "do", 2, T_IncludeR, 0 },
{ "dumpvars", 4, T_Dumpvars, 0 },
{ "dumpvars", 4, T_Dumpvars, 0 },
{ "duration", 3, T_Duration, 0 },
{ "else", 4, T_Else, 0 },
{ "else", 4, T_Else, 0 },
{ "endif", 5, T_EndIf, 0 },
{ "errmsg", 6, T_ErrMsg, 0 },
{ "errmsg", 6, T_ErrMsg, 0 },
{ "exit", 4, T_Exit, 0 },
{ "february", 3, T_Month, 1 },
{ "first", 5, T_Ordinal, 0 },
{ "flush", 5, T_Flush, 0 },
{ "fourth", 6, T_Ordinal, 3 },
{ "friday", 3, T_WkDay, 4 },
{ "from", 4, T_Scanfrom, FROM_TYPE },
{ "fset", 4, T_Fset, 0 },
{ "if", 2, T_If, 0 },
{ "iftrig", 6, T_IfTrig, 0 },
{ "in", 2, T_In, 0 },
{ "include", 3, T_Include, 0 },
{ "includecmd", 10, T_IncludeCmd, 0 },
{ "january", 3, T_Month, 0 },
{ "july", 3, T_Month, 6 },
{ "june", 3, T_Month, 5 },
{ "last", 4, T_Ordinal, -1 },
{ "march", 3, T_Month, 2 },
{ "may", 3, T_Month, 4 },
{ "maybe-uncomputable", 5, T_MaybeUncomputable, 0},
@@ -90,12 +94,14 @@ Token TokArray[] = {
{ "saturday", 3, T_WkDay, 5 },
{ "scanfrom", 4, T_Scanfrom, SCANFROM_TYPE },
{ "sched", 5, T_Sched, 0 },
{ "second", 6, T_Ordinal, 1 },
{ "september", 3, T_Month, 8 },
{ "set", 3, T_Set, 0 },
{ "skip", 3, T_Skip, SKIP_SKIP },
{ "special", 7, T_RemType, PASSTHRU_TYPE },
{ "sunday", 3, T_WkDay, 6 },
{ "tag", 3, T_Tag, 0 },
{ "third", 5, T_Ordinal, 2 },
{ "through", 7, T_Through, 0 },
{ "thursday", 3, T_WkDay, 3 },
{ "tuesday", 3, T_WkDay, 1 },
@@ -325,6 +331,14 @@ void FindNumericToken(char const *s, Token *t)
t->type = T_Back;
t->val *= mult;
return;
} else if (*s == '~') {
s++;
if (*s == '~') { mult = -1; s++; }
PARSENUM(t->val, s);
if (*s) return; /* Illegal token if followed by non-numeric char */
t->type = T_BackAdj;
t->val *= mult;
return;
}
return; /* Unknown token type */
}