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* Don't use ATerms for the abstract syntax trees anymore. Not

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finished yet.
This commit is contained in:
Eelco Dolstra 2010-04-12 18:30:11 +00:00
parent ed711f73bc
commit 4d6ad5be17
19 changed files with 693 additions and 579 deletions
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24
src/libexpr/lexer.l
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@ -8,9 +8,7 @@
%{
#include "aterm.hh"
#include "nixexpr.hh"
#include "nixexpr-ast.hh"
#define BISON_HEADER_HACK
#include "parser-tab.hh"
@ -45,8 +43,9 @@ static void adjustLoc(YYLTYPE * loc, const char * s, size_t len)
}
static Expr unescapeStr(const char * s)
static Expr * unescapeStr(const char * s)
{
#if 0
string t;
char c;
while ((c = *s++)) {
@ -66,6 +65,7 @@ static Expr unescapeStr(const char * s)
else t += c;
}
return makeStr(toATerm(t), ATempty);
#endif
}
@ -105,7 +105,7 @@ inherit { return INHERIT; }
\/\/ { return UPDATE; }
\+\+ { return CONCAT; }
{ID} { yylval->t = toATerm(yytext); return ID; /* !!! alloc */ }
{ID} { yylval->id = strdup(yytext); return ID; }
{INT} { int n = atoi(yytext); /* !!! overflow */
yylval->n = n;
return INT;
@ -117,7 +117,7 @@ inherit { return INHERIT; }
shouldn't be followed by a "{". Right now "$\"" will be consumed
as part of a string, rather than a "$" followed by the string
terminator. Disallow "$\"" for now. */
yylval->t = unescapeStr(yytext); /* !!! alloc */
yylval->e = unescapeStr(yytext);
return STR;
}
<STRING>\$\{ { BEGIN(INITIAL); return DOLLAR_CURLY; }
@ -126,31 +126,31 @@ inherit { return INHERIT; }
\'\'(\ *\n)? { BEGIN(IND_STRING); return IND_STRING_OPEN; }
<IND_STRING>([^\$\']|\$[^\{\']|\'[^\'\$])+ {
yylval->t = makeIndStr(toATerm(yytext));
//yylval->t = makeIndStr(toATerm(yytext));
return IND_STR;
}
<IND_STRING>\'\'\$ {
yylval->t = makeIndStr(toATerm("$"));
//yylval->t = makeIndStr(toATerm("$"));
return IND_STR;
}
<IND_STRING>\'\'\' {
yylval->t = makeIndStr(toATerm("''"));
//yylval->t = makeIndStr(toATerm("''"));
return IND_STR;
}
<IND_STRING>\'\'\\. {
yylval->t = unescapeStr(yytext + 2);
//yylval->t = unescapeStr(yytext + 2);
return IND_STR;
}
<IND_STRING>\$\{ { BEGIN(INITIAL); return DOLLAR_CURLY; }
<IND_STRING>\'\' { BEGIN(INITIAL); return IND_STRING_CLOSE; }
<IND_STRING>\' {
yylval->t = makeIndStr(toATerm("'"));
//yylval->t = makeIndStr(toATerm("'"));
return IND_STR;
}
<IND_STRING>. return yytext[0]; /* just in case: shouldn't be reached */
{PATH} { yylval->t = toATerm(yytext); return PATH; /* !!! alloc */ }
{URI} { yylval->t = toATerm(yytext); return URI; /* !!! alloc */ }
{PATH} { yylval->path = strdup(yytext); return PATH; }
{URI} { yylval->uri = strdup(yytext); return URI; }
[ \t\r\n]+ /* eat up whitespace */
\#[^\r\n]* /* single-line comments */