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feat(cpp): add qet
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-18
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‎README.md‎

Lines changed: 30 additions & 18 deletions
Original file line numberDiff line numberDiff line change
@@ -55,24 +55,36 @@ ls.setup({
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#### Auto-snippets
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| Trig | Desc | Context Required |
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| :-----: | -------------------------------------------------------- | :---------------------------: |
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| `ctor!` | Expand to default constructor | In Class |
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| `dtor!` | Expand to default destructor | In Class |
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| `cc!` | Expand to default copy constructor | In Class |
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| `mv!` | Expand to default move constructor | In Class |
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| `ncc!` | Expand to delete copy constructor | In Class |
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| `nmv!` | Expand to delete move constructor | In Class |
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| `ncm!` | Expand to delete copy and move constructor | In Class |
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| `once` | Expand to `pragma once` marker at the front of the file. | All lines before are comments |
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| `u8` | Expand to `uint8_t`. | No |
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| `u16` | Expand to `uint16_t`. | No |
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| `u32` | Expand to `uint32_t`. | No |
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| `u64` | Expand to `uint64_t`. | No |
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| `i8` | Expand to `int8_t`. | No |
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| `i16` | Expand to `int16_t`. | No |
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| `i32` | Expand to `int32_t`. | No |
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| `i64` | Expand to `int64_t`. | No |
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| Trig | Desc | Context Required |
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| :------: | -------------------------------------------------------- | :---------------------------: |
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| `ctor!` | Expand to default constructor | In Class |
61+
| `dtor!` | Expand to default destructor | In Class |
62+
| `cc!` | Expand to default copy constructor | In Class |
63+
| `mv!` | Expand to default move constructor | In Class |
64+
| `ncc!` | Expand to delete copy constructor | In Class |
65+
| `nmv!` | Expand to delete move constructor | In Class |
66+
| `ncm!` | Expand to delete copy and move constructor | In Class |
67+
| `once` | Expand to `pragma once` marker at the front of the file. | All lines before are comments |
68+
| `u8` | Expand to `uint8_t`. | No |
69+
| `u16` | Expand to `uint16_t`. | No |
70+
| `u32` | Expand to `uint32_t`. | No |
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| `u64` | Expand to `uint64_t`. | No |
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| `i8` | Expand to `int8_t`. | No |
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| `i16` | Expand to `int16_t`. | No |
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| `i32` | Expand to `int32_t`. | No |
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| `i64` | Expand to `int64_t`. | No |
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| `t(%s)!` | Evaluate (QET) marker, and expand to typename. | No |
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##### Quick Expand Type markers
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| Marker | Expand Type | Parameter |
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| :----: | :-------------------- | :-------: |
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| `v` | `std::vector` | 1 |
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| `i` | `int32_t` | 0 |
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| `u` | `uint32_t` | 0 |
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| `s` | `std::string` | 0 |
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| `m` | `absl::flat_hash_map` | 2 |
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| `t` | `std::tuple` | `*` |
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#### Postfix Snippets
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‎lua/luasnip-snippets/snippets/cpp/default.lua‎

Lines changed: 85 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -96,6 +96,70 @@ local all_lines_before_are_all_comments =
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"^%s*$",
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}
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---@param shortcut string
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---@return string?
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local function quick_type(shortcut)
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-- v = std::vector, 1
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-- i = int32_t, 0
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-- s = std::string, 0
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-- u = uint32_t, 0
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-- m = absl::flat_hash_map, 2
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-- t = std::tuple, *
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---@param s string
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---@return string?, string?
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local function expect_typename(s)
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local first, rest = s:match("^(%l)(.*)$")
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if first == nil then
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return nil, nil
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end
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if first == "v" then
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local typename, sub_rest = expect_typename(rest)
117+
if typename == nil then
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return "std::vector", rest
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else
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return ("std::vector<%s>"):format(typename), sub_rest
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end
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elseif first == "i" then
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return "int32_t", rest
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elseif first == "s" then
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return "std::string", rest
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elseif first == "u" then
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return "uint32_t", rest
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elseif first == "m" then
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local key_type, key_rest = expect_typename(rest)
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if key_type == nil or key_rest == nil then
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return "absl::flat_hash_map", rest
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end
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local value_type, value_rest = expect_typename(key_rest)
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if value_type == nil or value_rest == nil then
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return "absl::flat_hash_map", rest
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end
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return ("absl::flat_hash_map<%s, %s>"):format(key_type, value_type),
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value_rest
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elseif first == "t" then
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local parameters = {}
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while #rest > 0 do
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local typename, sub_rest = expect_typename(rest)
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if typename == nil or sub_rest == nil then
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if #parameters == 0 then
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return "std::tuple", rest
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end
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return ("std::tuple<%s>"):format(table.concat(parameters, ", ")), rest
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end
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parameters[#parameters + 1] = typename
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rest = sub_rest
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end
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return ("std::tuple<%s>"):format(table.concat(parameters, ", ")), rest
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end
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end
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local result, rest = expect_typename(shortcut)
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if rest and #rest > 0 then
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print(("After QET eval, rest not empty: %s"):format(rest))
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end
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return result
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end
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return {
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cpo_snippet,
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@@ -123,4 +187,25 @@ return {
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int_type_snippet(32, false),
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int_type_snippet(64, true),
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int_type_snippet(64, false),
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-- quick expand, expand stl types
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-- v = std::vector
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-- i = int32_t
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-- s = std::string
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-- u = uint32_t
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-- m = absl::flat_hash_map
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-- t = std::tuple
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ls.s({
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trig = "t(%l+)!",
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wordTrig = true,
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regTrig = true,
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snippetType = "autosnippet",
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name = "(t) Quick types",
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desc = "Expands to a type",
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}, {
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f(function(_, snip)
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local shortcut = snip.captures[1]
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return quick_type(shortcut)
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end),
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}),
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}

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