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#include "data.h"
#include "graphviz.h"
static int
pgf_graphviz_abstract_tree_(PgfExpr expr, int *pid,
GuWriter* wtr, GuExn* err)
{
int id = -1;
GuVariantInfo ei = gu_variant_open(expr);
switch (ei.tag) {
case PGF_EXPR_ABS:
gu_impossible();
break;
case PGF_EXPR_APP: {
PgfExprApp* app = ei.data;
id = pgf_graphviz_abstract_tree_(app->fun, pid, wtr, err);
int arg_id = pgf_graphviz_abstract_tree_(app->arg, pid, wtr, err);
gu_printf(wtr, err, "n%d -- n%d [style = \"solid\"]\n", id, arg_id);
break;
}
case PGF_EXPR_LIT: {
PgfExprLit* lit = ei.data;
id = (*pid)++;
gu_printf(wtr, err, "n%d[label = \"", id);
GuVariantInfo ei = gu_variant_open(lit->lit);
switch (ei.tag) {
case PGF_LITERAL_STR: {
PgfLiteralStr* lit = ei.data;
gu_puts("\\\"", wtr, err);
gu_string_write(lit->val, wtr, err);
gu_puts("\\\"", wtr, err);
break;
}
case PGF_LITERAL_INT: {
PgfLiteralInt* lit = ei.data;
gu_printf(wtr, err, "%d", lit->val);
break;
}
case PGF_LITERAL_FLT: {
PgfLiteralFlt* lit = ei.data;
gu_printf(wtr, err, "%lf", lit->val);
break;
}
default:
gu_impossible();
}
gu_puts("\", style = \"solid\", shape = \"plaintext\"]\n", wtr, err);
break;
}
case PGF_EXPR_META:
id = (*pid)++;
gu_printf(wtr, err, "n%d[label = \"?\", style = \"solid\", shape = \"plaintext\"]\n", id);
break;
case PGF_EXPR_FUN: {
PgfExprFun* fun = ei.data;
id = (*pid)++;
gu_printf(wtr, err, "n%d[label = \"", id);
gu_string_write(fun->fun, wtr, err);
gu_puts("\", style = \"solid\", shape = \"plaintext\"]\n", wtr, err);
break;
}
case PGF_EXPR_VAR:
gu_impossible();
break;
case PGF_EXPR_TYPED: {
PgfExprTyped* typed = ei.data;
id = pgf_graphviz_abstract_tree_(typed->expr, pid, wtr, err);
break;
}
case PGF_EXPR_IMPL_ARG: {
PgfExprImplArg* implarg = ei.data;
id = pgf_graphviz_abstract_tree_(implarg->expr, pid, wtr, err);
break;
}
default:
gu_impossible();
}
return id;
}
void
pgf_graphviz_abstract_tree(PgfExpr expr, GuWriter* wtr, GuExn* err)
{
int id = 0;
gu_puts("graph {\n", wtr, err);
pgf_graphviz_abstract_tree_(expr, &id, wtr, err);
gu_puts("}", wtr, err);
}
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