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table: optimize generated code for an empty interface (#10624)

pull/10636/head
yuyi 2021-07-01 17:25:40 +08:00 committed by GitHub
parent 41e88423aa
commit 8b901df366
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1 changed files with 9 additions and 4 deletions
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13
vlib/v/ast/table.v
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@ -1037,24 +1037,29 @@ pub fn (t &Table) has_deep_child_no_ref(ts &TypeSymbol, name string) bool {
// complete_interface_check does a MxN check for all M interfaces vs all N types, to determine what types implement what interfaces.
// It short circuits most checks when an interface can not possibly be implemented by a type.
pub fn (mut table Table) complete_interface_check() {
pub fn (mut t Table) complete_interface_check() {
util.timing_start(@METHOD)
defer {
util.timing_measure(@METHOD)
}
for tk, mut tsym in table.type_symbols {
for tk, mut tsym in t.type_symbols {
if tsym.kind != .struct_ {
continue
}
info := tsym.info as Struct
for _, mut idecl in table.interfaces {
for _, mut idecl in t.interfaces {
if idecl.methods.len > tsym.methods.len {
continue
}
if idecl.fields.len > info.fields.len {
continue
}
table.does_type_implement_interface(tk, idecl.typ)
// empty interface only generate type cast functions of the current module
if idecl.methods.len == 0 && idecl.fields.len == 0
&& tsym.mod != t.get_type_symbol(idecl.typ).mod {
continue
}
t.does_type_implement_interface(tk, idecl.typ)
}
}
}