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respect ambiguity with ., add ... to indicate more answers

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This commit is contained in:
Mark Thom
2019-04-29 22:44:53 -06:00
parent 14d629492d
commit fb023c99c1
6 changed files with 34 additions and 31 deletions
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30
src/prolog/machine/mod.rs
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@@ -465,8 +465,10 @@ impl Machine {
if !(self.machine_st.b > 0) {
if bindings.is_empty() {
let space = if requires_space(&attr_goals, ".") { " " } else { "" };
if !attr_goals.is_empty() {
println!("{}.", attr_goals);
println!("{}{}.", attr_goals, space);
} else {
println!("true.");
}
@@ -483,24 +485,24 @@ impl Machine {
if !attr_goals.is_empty() {
if bindings.is_empty() {
let space = if requires_space(&attr_goals, ".") { " " } else { "" };
write!(raw_stdout, "{}{}", attr_goals, space).unwrap();
write!(raw_stdout, "{}", attr_goals).unwrap();
} else {
let space = if requires_space(&attr_goals, ".") { " " } else { "" };
write!(raw_stdout, "{}, {}{}", bindings, attr_goals, space).unwrap();
write!(raw_stdout, "{}, {}", bindings, attr_goals).unwrap();
}
} else if !bindings.is_empty() {
let space = if requires_space(&bindings, ".") { " " } else { "" };
write!(raw_stdout, "{}{}", bindings, space).unwrap();
write!(raw_stdout, "{}", bindings).unwrap();
}
if self.machine_st.b > 0 {
raw_stdout.flush().unwrap();
let result = match next_keypress(raw_stdout) {
ContinueResult::ContinueQuery =>
self.continue_query(&alloc_locs, &mut heap_locs),
let result = match next_keypress() {
ContinueResult::ContinueQuery => {
write!(raw_stdout, " ;\r\n").unwrap();
self.continue_query(&alloc_locs, &mut heap_locs)
},
ContinueResult::Conclude => {
write!(raw_stdout, " ...\r\n").unwrap();
self.machine_st.absorb_snapshot(snapshot);
return;
}
@@ -531,7 +533,13 @@ impl Machine {
if bindings.is_empty() && attr_goals.is_empty() {
write!(raw_stdout, "true.\r\n").unwrap();
} else {
write!(raw_stdout, ".\r\n").unwrap();
let space = if !attr_goals.is_empty() {
if requires_space(&attr_goals, ".") { " " } else { "" }
} else {
if requires_space(&bindings, ".") { " " } else { "" }
};
write!(raw_stdout, "{}.\r\n", space).unwrap();
}
break;