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cgen: fix rune array sort (#9561)

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yuyi 2021-04-02 22:28:27 +08:00 committed by GitHub
parent 9ba8d02a5a
commit 3637bac716
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2 changed files with 69 additions and 38 deletions
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15
vlib/builtin/array_test.v
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@ -807,6 +807,21 @@ fn test_sort() {
// assert users.map(it.name).join(' ') == 'Alice Bob Peter'
}
fn test_rune_sort() {
mut bs := [`f`, `e`, `d`, `b`, `c`, `a`]
bs.sort()
println(bs)
assert '$bs' == '[`a`, `b`, `c`, `d`, `e`, `f`]'
bs.sort(a > b)
println(bs)
assert '$bs' == '[`f`, `e`, `d`, `c`, `b`, `a`]'
bs.sort(a < b)
println(bs)
assert '$bs' == '[`a`, `b`, `c`, `d`, `e`, `f`]'
}
fn test_sort_by_different_order_of_a_b() {
mut x := [1, 2, 3]
x.sort(a < b)

92
vlib/v/gen/c/array.v
View File

@ -248,46 +248,62 @@ fn (mut g Gen) gen_array_sort(node ast.CallExpr) {
}
// Register a new custom `compare_xxx` function for qsort()
g.table.register_fn(name: compare_fn, return_type: ast.int_type)
infix_expr := node.args[0].expr as ast.InfixExpr
// Variables `a` and `b` are used in the `.sort(a < b)` syntax, so we can reuse them
// when generating the function as long as the args are named the same.
styp_arg := g.typ(typ)
g.definitions.writeln('int $compare_fn ($styp_arg* a, $styp_arg* b) {')
sym := g.table.get_type_symbol(typ)
if !is_reverse && sym.has_method('<') && infix_expr.left.str().len == 1 {
g.definitions.writeln('\tif (${styp}__lt(*a, *b)) { return -1; } else { return 1; }}')
} else if is_reverse && sym.has_method('<') && infix_expr.left.str().len == 1 {
g.definitions.writeln('\tif (${styp}__lt(*b, *a)) { return -1; } else { return 1; }}')
} else {
field_type := g.typ(infix_expr.left_type)
mut left_expr_str := g.write_expr_to_string(infix_expr.left)
mut right_expr_str := g.write_expr_to_string(infix_expr.right)
if typ.is_ptr() {
left_expr_str = left_expr_str.replace_once('a', '(*a)')
right_expr_str = right_expr_str.replace_once('b', '(*b)')
}
g.definitions.writeln('$field_type a_ = $left_expr_str;')
g.definitions.writeln('$field_type b_ = $right_expr_str;')
mut op1, mut op2 := '', ''
if infix_expr.left_type == ast.string_type {
if is_reverse {
op1 = 'string_gt(a_, b_)'
op2 = 'string_lt(a_, b_)'
} else {
op1 = 'string_lt(a_, b_)'
op2 = 'string_gt(a_, b_)'
}
if node.args.len == 0 {
styp_arg := g.typ(typ)
g.definitions.writeln('int $compare_fn ($styp_arg* a, $styp_arg* b) {')
sym := g.table.get_type_symbol(typ)
if !is_reverse && sym.has_method('<') {
g.definitions.writeln('\tif (${styp}__lt(*a, *b)) { return -1; } else { return 1; }}')
} else if is_reverse && sym.has_method('<') {
g.definitions.writeln('\tif (${styp}__lt(*b, *a)) { return -1; } else { return 1; }}')
} else {
if is_reverse {
op1 = 'a_ > b_'
op2 = 'a_ < b_'
} else {
op1 = 'a_ < b_'
op2 = 'a_ > b_'
}
g.definitions.writeln('if (*a < *b) return -1;')
g.definitions.writeln('if (*a > *b) return 1; return 0; }\n')
}
} else {
infix_expr := node.args[0].expr as ast.InfixExpr
// Variables `a` and `b` are used in the `.sort(a < b)` syntax, so we can reuse them
// when generating the function as long as the args are named the same.
styp_arg := g.typ(typ)
g.definitions.writeln('int $compare_fn ($styp_arg* a, $styp_arg* b) {')
sym := g.table.get_type_symbol(typ)
if !is_reverse && sym.has_method('<') && infix_expr.left.str().len == 1 {
g.definitions.writeln('\tif (${styp}__lt(*a, *b)) { return -1; } else { return 1; }}')
} else if is_reverse && sym.has_method('<') && infix_expr.left.str().len == 1 {
g.definitions.writeln('\tif (${styp}__lt(*b, *a)) { return -1; } else { return 1; }}')
} else {
field_type := g.typ(infix_expr.left_type)
mut left_expr_str := g.write_expr_to_string(infix_expr.left)
mut right_expr_str := g.write_expr_to_string(infix_expr.right)
if typ.is_ptr() {
left_expr_str = left_expr_str.replace_once('a', '(*a)')
right_expr_str = right_expr_str.replace_once('b', '(*b)')
}
g.definitions.writeln('$field_type a_ = $left_expr_str;')
g.definitions.writeln('$field_type b_ = $right_expr_str;')
mut op1, mut op2 := '', ''
if infix_expr.left_type == ast.string_type {
if is_reverse {
op1 = 'string_gt(a_, b_)'
op2 = 'string_lt(a_, b_)'
} else {
op1 = 'string_lt(a_, b_)'
op2 = 'string_gt(a_, b_)'
}
} else {
deref_str := if infix_expr.left_type.is_ptr() { '*' } else { '' }
if is_reverse {
op1 = '${deref_str}a_ > ${deref_str}b_'
op2 = '${deref_str}a_ < ${deref_str}b_'
} else {
op1 = '${deref_str}a_ < ${deref_str}b_'
op2 = '${deref_str}a_ > ${deref_str}b_'
}
}
g.definitions.writeln('if ($op1) return -1;')
g.definitions.writeln('if ($op2) return 1; return 0; }\n')
}
g.definitions.writeln('if ($op1) return -1;')
g.definitions.writeln('if ($op2) return 1; return 0; }\n')
}
}
if is_reverse && !compare_fn.ends_with('_reverse') {