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* Indented strings.

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This commit is contained in:
Eelco Dolstra 2010-04-12 22:03:27 +00:00
parent a60317f20f
commit d4f0b0fc6c
7 changed files with 65 additions and 70 deletions
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70
src/libexpr/parser.y
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@ -174,11 +174,12 @@ static void checkPatternVars(ATerm pos, Pattern pat)
ATermMap map;
checkPatternVars(pos, map, pat);
}
#endif
static Expr stripIndentation(ATermList es)
static Expr * stripIndentation(vector<Expr *> & es)
{
if (es == ATempty) return makeStr("");
if (es.empty()) return new ExprString("");
/* Figure out the minimum indentation. Note that by design
whitespace-only final lines are not taken into account. (So
@ -186,9 +187,9 @@ static Expr stripIndentation(ATermList es)
bool atStartOfLine = true; /* = seen only whitespace in the current line */
unsigned int minIndent = 1000000;
unsigned int curIndent = 0;
ATerm e;
for (ATermIterator i(es); i; ++i) {
if (!matchIndStr(*i, e)) {
foreach (vector<Expr *>::iterator, i, es) {
ExprIndStr * e = dynamic_cast<ExprIndStr *>(*i);
if (!e) {
/* Anti-quotations end the current start-of-line whitespace. */
if (atStartOfLine) {
atStartOfLine = false;
@ -196,12 +197,11 @@ static Expr stripIndentation(ATermList es)
}
continue;
}
string s = aterm2String(e);
for (unsigned int j = 0; j < s.size(); ++j) {
for (unsigned int j = 0; j < e->s.size(); ++j) {
if (atStartOfLine) {
if (s[j] == ' ')
if (e->s[j] == ' ')
curIndent++;
else if (s[j] == '\n') {
else if (e->s[j] == '\n') {
/* Empty line, doesn't influence minimum
indentation. */
curIndent = 0;
@ -209,7 +209,7 @@ static Expr stripIndentation(ATermList es)
atStartOfLine = false;
if (curIndent < minIndent) minIndent = curIndent;
}
} else if (s[j] == '\n') {
} else if (e->s[j] == '\n') {
atStartOfLine = true;
curIndent = 0;
}
@ -217,37 +217,37 @@ static Expr stripIndentation(ATermList es)
}
/* Strip spaces from each line. */
ATermList es2 = ATempty;
vector<Expr *> * es2 = new vector<Expr *>;
atStartOfLine = true;
unsigned int curDropped = 0;
unsigned int n = ATgetLength(es);
for (ATermIterator i(es); i; ++i, --n) {
if (!matchIndStr(*i, e)) {
unsigned int n = es.size();
for (vector<Expr *>::iterator i = es.begin(); i != es.end(); ++i, --n) {
ExprIndStr * e = dynamic_cast<ExprIndStr *>(*i);
if (!e) {
atStartOfLine = false;
curDropped = 0;
es2 = ATinsert(es2, *i);
es2->push_back(*i);
continue;
}
string s = aterm2String(e);
string s2;
for (unsigned int j = 0; j < s.size(); ++j) {
for (unsigned int j = 0; j < e->s.size(); ++j) {
if (atStartOfLine) {
if (s[j] == ' ') {
if (e->s[j] == ' ') {
if (curDropped++ >= minIndent)
s2 += s[j];
s2 += e->s[j];
}
else if (s[j] == '\n') {
else if (e->s[j] == '\n') {
curDropped = 0;
s2 += s[j];
s2 += e->s[j];
} else {
atStartOfLine = false;
curDropped = 0;
s2 += s[j];
s2 += e->s[j];
}
} else {
s2 += s[j];
if (s[j] == '\n') atStartOfLine = true;
s2 += e->s[j];
if (e->s[j] == '\n') atStartOfLine = true;
}
}
@ -258,13 +258,12 @@ static Expr stripIndentation(ATermList es)
if (p != string::npos && s2.find_first_not_of(' ', p + 1) == string::npos)
s2 = string(s2, 0, p + 1);
}
es2 = ATinsert(es2, makeStr(s2));
es2->push_back(new ExprString(s2));
}
return makeConcatStrings(ATreverse(es2));
return new ExprConcatStrings(es2);
}
#endif
void backToString(yyscan_t scanner);
@ -316,11 +315,10 @@ void yyerror(YYLTYPE * loc, yyscan_t scanner, ParseData * data, const char * err
%type <e> expr_app expr_select expr_simple
%type <list> expr_list
%type <attrs> binds
%type <ts> attrpath ind_string_parts
%type <formals> formals
%type <formal> formal
%type <ids> ids
%type <string_parts> string_parts
%type <ids> ids attrpath
%type <string_parts> string_parts ind_string_parts
%token <id> ID ATTRPATH
%token <e> STR IND_STR
%token <n> INT
@ -411,11 +409,9 @@ expr_simple
else if ($2->size() == 1) $$ = $2->front();
else $$ = new ExprConcatStrings($2);
}
/*
| IND_STRING_OPEN ind_string_parts IND_STRING_CLOSE {
$$ = stripIndentation(ATreverse($2));
$$ = stripIndentation(*$2);
}
*/
| PATH { $$ = new ExprPath(absPath($1, data->basePath)); }
| URI { $$ = new ExprString($1); }
| '(' expr ')' { $$ = $2; }
@ -437,9 +433,9 @@ string_parts
;
ind_string_parts
: ind_string_parts IND_STR { $$ = ATinsert($1, $2); }
| ind_string_parts DOLLAR_CURLY expr '}' { backToIndString(scanner); $$ = ATinsert($1, $3); }
| { $$ = ATempty; }
: ind_string_parts IND_STR { $$ = $1; $1->push_back($2); }
| ind_string_parts DOLLAR_CURLY expr '}' { backToIndString(scanner); $$ = $1; $1->push_back($3); }
| { $$ = new vector<Expr *>; }
;
binds