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refactor(frontends/lean): use ascii prefix for auxiliary let-declarations

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2014-01-29 11:58:09 -08:00
parent 62408a6adc
commit f0a2d3627e
1 changed files with 9 additions and 9 deletions
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18
src/frontends/lean/pp.cpp
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@ -110,9 +110,9 @@ bool get_pp_def_value(options const & opts) { return opts.get_bool(g_
// =======================================
// Prefixes for naming local aliases (auxiliary local decls)
static name g_kappa("\u03BA");
static name g_pho("\u03C1");
static name g_nu("\u03BD");
static name g_a("a");
static name g_b("b");
static name g_c("c");
// =======================================
/**
@ -1158,16 +1158,16 @@ class pp_fn {
}
name find_unused_prefix(expr const & e) {
if (!uses_prefix(e, g_kappa)) {
return g_kappa;
} else if (!uses_prefix(e, g_pho)) {
return g_pho;
if (!uses_prefix(e, g_a)) {
return g_a;
} else if (!uses_prefix(e, g_b)) {
return g_b;
} else {
unsigned i = 1;
name n(g_nu, i);
name n(g_c, i);
while (uses_prefix(e, n)) {
i++;
n = name(g_nu, i);
n = name(g_c, i);
}
return n;
}