127 lines
3.1 KiB
V
127 lines
3.1 KiB
V
module code
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import freeflowuniverse.herolib.core.texttools
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pub struct Function {
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pub:
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name string @[omitempty]
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receiver Param @[omitempty]
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is_pub bool @[omitempty]
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mod string @[omitempty]
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pub mut:
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summary string @[omitempty]
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description string @[omitempty]
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params []Param @[omitempty]
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body string @[omitempty]
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result Param @[omitempty]
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has_return bool @[omitempty]
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}
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// vgen_function generates a function statement for a function
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pub fn (function Function) vgen(options WriteOptions) string {
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mut params_ := function.params.clone()
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optionals := function.params.filter(it.is_optional)
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options_struct := Struct{
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name: '${texttools.pascal_case(function.name)}Options'
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attrs: [Attribute{
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name: 'params'
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}]
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fields: optionals.map(StructField{
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name: it.name
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description: it.description
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typ: it.typ
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})
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}
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if optionals.len > 0 {
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params_ << Param{
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name: 'options'
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typ: type_from_symbol(options_struct.name)
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}
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}
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params := params_.filter(!it.is_optional).map(it.vgen()).join(', ')
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receiver_ := Param{
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...function.receiver
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typ: if function.receiver.typ is Result {
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function.receiver.typ.typ
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} else {
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function.receiver.typ
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}
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}
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receiver := if receiver_.vgen().trim_space() != '' {
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'(${receiver_.vgen()})'
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} else {
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''
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}
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name := texttools.name_fix(function.name)
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result := function.result.typ.vgen()
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mut function_str := $tmpl('templates/function/function.v.template')
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// if options.format {
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// result := os.execute_opt('echo "${function_str.replace('$', '\\$')}" | v fmt') or {
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// panic('${function_str}\n${err}')
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// }
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// function_str = result.output
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// }
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function_str = function_str.split_into_lines().filter(!it.starts_with('import ')).join('\n')
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return if options_struct.fields.len != 0 {
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'${options_struct.vgen()}\n${function_str}'
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} else {
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function_str
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}
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}
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pub fn new_function(code string) !Function {
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// TODO: implement function from file line
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return parse_function(code)!
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}
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pub fn parse_function(code_ string) !Function {
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mut code := code_.trim_space()
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is_pub := code.starts_with('pub ')
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if is_pub {
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code = code.trim_string_left('pub ').trim_space()
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}
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is_fn := code.starts_with('fn ')
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if !is_fn {
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return error('invalid function format')
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}
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code = code.trim_string_left('fn ').trim_space()
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receiver := if code.starts_with('(') {
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param_str := code.all_after('(').all_before(')').trim_space()
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code = code.all_after(')').trim_space()
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parse_param(param_str)!
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} else {
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Param{}
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}
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name := code.all_before('(').trim_space()
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code = code.trim_string_left(name).trim_space()
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params_str := code.all_after('(').all_before(')')
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params := if params_str.trim_space() != '' {
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params_str_lst := params_str.split(',')
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params_str_lst.map(parse_param(it)!)
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} else {
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[]Param{}
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}
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result := new_param(
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v: code.all_after(')').all_before('{').replace(' ', '')
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)!
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body := if code.contains('{') { code.all_after('{').all_before_last('}') } else { '' }
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return Function{
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name: name
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receiver: receiver
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params: params
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result: result
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body: body
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}
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}
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