2007 lines
45 KiB
V
2007 lines
45 KiB
V
module js
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import strings
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import v.ast
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import v.token
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import v.pref
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import v.util
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import v.depgraph
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import encoding.base64
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import v.gen.js.sourcemap
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struct MutArg {
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tmp_var string
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expr ast.Expr = ast.empty_expr()
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}
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const (
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// https://ecma-international.org/ecma-262/#sec-reserved-words
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js_reserved = ['await', 'break', 'case', 'catch', 'class', 'const', 'continue', 'debugger',
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'default', 'delete', 'do', 'else', 'enum', 'export', 'extends', 'finally', 'for', 'function',
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'if', 'implements', 'import', 'in', 'instanceof', 'interface', 'let', 'new', 'package',
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'private', 'protected', 'public', 'return', 'static', 'super', 'switch', 'this', 'throw',
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'try', 'typeof', 'var', 'void', 'while', 'with', 'yield', 'Number', 'String', 'Boolean',
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'Array', 'Map']
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// used to generate type structs
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v_types = ['i8', 'i16', 'int', 'i64', 'byte', 'u16', 'u32', 'u64', 'f32', 'f64',
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'int_literal', 'float_literal', 'size_t', 'bool', 'string', 'map', 'array']
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shallow_equatables = [ast.Kind.i8, .i16, .int, .i64, .byte, .u16, .u32, .u64, .f32, .f64,
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.int_literal, .float_literal, .size_t, .bool, .string]
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)
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struct SourcemapHelper {
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src_path string
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src_line u32
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ns_pos u32
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}
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struct Namespace {
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name string
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mut:
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out strings.Builder = strings.new_builder(128)
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pub_vars []string
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imports map[string]string
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indent int
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methods map[string][]ast.FnDecl
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sourcemap_helper []SourcemapHelper
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}
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[heap]
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struct JsGen {
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pref &pref.Preferences
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mut:
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table &ast.Table
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definitions strings.Builder
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ns &Namespace
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namespaces map[string]&Namespace
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doc &JsDoc
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enable_doc bool
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file &ast.File
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tmp_count int
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inside_ternary bool
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inside_loop bool
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inside_map_set bool // map.set(key, value)
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inside_builtin bool
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generated_builtin bool
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inside_def_typ_decl bool
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is_test bool
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stmt_start_pos int
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defer_stmts []ast.DeferStmt
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fn_decl &ast.FnDecl // pointer to the FnDecl we are currently inside otherwise 0
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str_types []string // types that need automatic str() generation
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method_fn_decls map[string][]ast.FnDecl
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builtin_fns []string // Functions defined in `builtin`
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empty_line bool
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cast_stack []ast.Type
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call_stack []ast.CallExpr
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is_vlines_enabled bool // is it safe to generate #line directives when -g is passed
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sourcemap sourcemap.SourceMap // maps lines in generated javascrip file to original source files and line
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comptime_var_type_map map[string]ast.Type
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defer_ifdef string
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}
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pub fn gen(files []&ast.File, table &ast.Table, pref &pref.Preferences) string {
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mut g := &JsGen{
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definitions: strings.new_builder(100)
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table: table
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pref: pref
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fn_decl: 0
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empty_line: true
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doc: 0
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ns: 0
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enable_doc: true
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file: 0
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}
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g.doc = new_jsdoc(g)
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// TODO: Add '[-no]-jsdoc' flag
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if pref.is_prod {
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g.enable_doc = false
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g.is_vlines_enabled = false
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}
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g.init()
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mut graph := depgraph.new_dep_graph()
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if g.pref.sourcemap {
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mut sg := sourcemap.generate_empty_map()
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g.sourcemap = sg.add_map('', '', g.pref.sourcemap_src_included, 0, 0)
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}
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// Get class methods
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for file in files {
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g.file = file
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g.enter_namespace(g.file.mod.name)
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g.is_test = g.pref.is_test
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g.find_class_methods(file.stmts)
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g.escape_namespace()
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}
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for file in files {
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g.file = file
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g.enter_namespace(g.file.mod.name)
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g.is_test = g.pref.is_test
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// store imports
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mut imports := []string{}
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for imp in g.file.imports {
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imports << imp.mod
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}
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graph.add(g.file.mod.name, imports)
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// builtin types
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if g.file.mod.name == 'builtin' && !g.generated_builtin {
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g.gen_builtin_type_defs()
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g.writeln('Object.defineProperty(array.prototype,"len", { get: function() {return new builtin.int(this.arr.length);}, set: function(l) { this.arr.length = l.valueOf(); } }); ')
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g.writeln('Object.defineProperty(string.prototype,"len", { get: function() {return new builtin.int(this.str.length);}, set: function(l) {/* ignore */ } }); ')
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g.writeln('Object.defineProperty(map.prototype,"len", { get: function() {return new builtin.int(this.map.length);}, set: function(l) { this.map.length = l.valueOf(); } }); ')
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g.writeln('Object.defineProperty(array.prototype,"length", { get: function() {return new builtin.int(this.arr.length);}, set: function(l) { this.arr.length = l.valueOf(); } }); ')
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g.generated_builtin = true
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}
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g.stmts(file.stmts)
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// store the current namespace
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g.escape_namespace()
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}
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// resolve imports
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deps_resolved := graph.resolve()
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nodes := deps_resolved.nodes
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mut out := g.hashes() + g.definitions.str()
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// equality check for js objects
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// TODO: Fix msvc bug that's preventing $embed_file('fast_deep_equal.js')
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// unsafe {
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// mut eq_fn := $embed_file('fast_deep_equal.js')
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// out += eq_fn.data().vstring()
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//}
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out += fast_deep_eq_fn
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for node in nodes {
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name := g.js_name(node.name).replace('.', '_')
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if g.enable_doc {
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out += '/** @namespace $name */\n'
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}
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out += 'const $name = (function ('
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mut namespace := g.namespaces[node.name]
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mut first := true
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for _, val in namespace.imports {
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if !first {
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out += ', '
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}
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first = false
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out += val
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}
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out += ') {\n\t'
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namespace_code := namespace.out.str()
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if g.pref.sourcemap {
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// calculate current output start line
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mut current_line := u32(out.count('\n') + 1)
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mut sm_pos := u32(0)
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for sourcemap_ns_entry in namespace.sourcemap_helper {
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// calculate final generated location in output based on position
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current_segment := namespace_code.substr(int(sm_pos), int(sourcemap_ns_entry.ns_pos))
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current_line += u32(current_segment.count('\n'))
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current_column := if last_nl_pos := current_segment.last_index('\n') {
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u32(current_segment.len - last_nl_pos - 1)
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} else {
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u32(0)
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}
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g.sourcemap.add_mapping(sourcemap_ns_entry.src_path, sourcemap.SourcePosition{
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source_line: sourcemap_ns_entry.src_line
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source_column: 0 // sourcemap_ns_entry.src_column
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}, current_line, current_column, '')
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sm_pos = sourcemap_ns_entry.ns_pos
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}
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}
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out += namespace_code
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// public scope
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out += '\n'
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if g.enable_doc {
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out += '\n\t/* module exports */'
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}
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out += '\n\treturn {'
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// export builtin types
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if name == 'builtin' {
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for typ in js.v_types {
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out += '\n\t\t$typ,'
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}
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}
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for i, pub_var in namespace.pub_vars {
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out += '\n\t\t$pub_var'
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if i < namespace.pub_vars.len - 1 {
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out += ','
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}
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}
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if namespace.pub_vars.len > 0 {
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out += '\n\t'
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}
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out += '};'
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out += '\n})('
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first = true
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for key, _ in namespace.imports {
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if !first {
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out += ', '
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}
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first = false
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out += key.replace('.', '_')
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}
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out += ');\n'
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// generate builtin basic type casts
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if name == 'builtin' {
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out += '// builtin type casts\n'
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out += 'const ['
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for i, typ in js.v_types {
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if i > 0 {
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out += ', '
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}
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out += '$typ'
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}
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out += '] = ['
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for i, typ in js.v_types {
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if i > 0 {
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out += ','
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}
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out += '\n\tfunction(val) { return new builtin.${typ}(val) }'
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}
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out += '\n]\n'
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}
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}
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if pref.is_shared {
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// Export, through CommonJS, the module of the entry file if `-shared` was passed
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export := nodes[nodes.len - 1].name
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out += 'if (typeof module === "object" && module.exports) module.exports = $export;\n'
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}
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out += '\n'
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if g.pref.sourcemap {
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out += g.create_sourcemap()
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}
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return out
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}
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fn (g JsGen) create_sourcemap() string {
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mut sm := g.sourcemap
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mut out := '\n//# sourceMappingURL=data:application/json;base64,'
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out += base64.encode(sm.to_json().str().bytes())
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out += '\n'
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return out
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}
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pub fn (mut g JsGen) enter_namespace(name string) {
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if g.namespaces[name] == 0 {
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// create a new namespace
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ns := &Namespace{
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name: name
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}
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g.namespaces[name] = ns
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g.ns = ns
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} else {
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g.ns = g.namespaces[name]
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}
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g.inside_builtin = name == 'builtin'
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}
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pub fn (mut g JsGen) escape_namespace() {
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g.ns = &Namespace(0)
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g.inside_builtin = false
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}
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pub fn (mut g JsGen) push_pub_var(s string) {
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g.ns.pub_vars << g.js_name(s)
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}
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pub fn (mut g JsGen) find_class_methods(stmts []ast.Stmt) {
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for stmt in stmts {
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match stmt {
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ast.FnDecl {
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if stmt.is_method {
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// Found struct method, store it to be generated along with the class.
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mut class_name := g.table.get_type_name(stmt.receiver.typ)
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// Workaround until `map[key] << val` works.
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mut arr := g.method_fn_decls[class_name]
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arr << stmt
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g.method_fn_decls[class_name] = arr
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}
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}
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else {}
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}
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}
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}
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pub fn (mut g JsGen) init() {
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g.definitions.writeln('// Generated by the V compiler\n')
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g.definitions.writeln('"use strict";')
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g.definitions.writeln('')
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g.definitions.writeln('var \$global = (new Function("return this"))();')
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g.definitions.writeln('function \$ref(value) { this.val = value; } ')
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g.definitions.writeln('\$ref.prototype.valueOf = function() { return this.val; } ')
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if g.pref.backend != .js_node {
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g.definitions.writeln('const \$process = {')
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g.definitions.writeln(' arch: "js",')
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if g.pref.backend == .js_freestanding {
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g.definitions.writeln(' platform: "freestanding"')
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} else {
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g.definitions.writeln(' platform: "browser"')
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}
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g.definitions.writeln('}')
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g.definitions.writeln('const \$os = {')
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g.definitions.writeln(' endianess: "LE",')
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g.definitions.writeln('}')
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} else {
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g.definitions.writeln('const \$os = require("os");')
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g.definitions.writeln('const \$process = process;')
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}
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}
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pub fn (g JsGen) hashes() string {
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mut res := '// V_COMMIT_HASH $util.vhash()\n'
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res += '// V_CURRENT_COMMIT_HASH ${util.githash(g.pref.building_v)}\n'
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return res
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}
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[noreturn]
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fn verror(msg string) {
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eprintln('jsgen error: $msg')
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exit(1)
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}
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[inline]
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pub fn (mut g JsGen) gen_indent() {
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if g.ns.indent > 0 && g.empty_line {
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g.ns.out.write_string(util.tabs(g.ns.indent))
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}
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g.empty_line = false
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}
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[inline]
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pub fn (mut g JsGen) inc_indent() {
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g.ns.indent++
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}
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[inline]
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pub fn (mut g JsGen) dec_indent() {
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g.ns.indent--
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}
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[inline]
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pub fn (mut g JsGen) write(s string) {
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if g.ns == 0 {
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verror('g.write: not in a namespace')
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}
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g.gen_indent()
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g.ns.out.write_string(s)
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}
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[inline]
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pub fn (mut g JsGen) writeln(s string) {
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if g.ns == 0 {
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verror('g.writeln: not in a namespace')
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}
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g.gen_indent()
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g.ns.out.writeln(s)
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g.empty_line = true
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}
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[inline]
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pub fn (mut g JsGen) new_tmp_var() string {
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g.tmp_count++
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return '_tmp$g.tmp_count'
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}
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// 'mod1.mod2.fn' => 'mod1.mod2'
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// 'fn' => ''
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[inline]
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fn get_ns(s string) string {
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idx := s.last_index('.') or { return '' }
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return s.substr(0, idx)
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}
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fn (mut g JsGen) get_alias(name string) string {
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ns := get_ns(name)
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if ns == '' {
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return name
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}
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alias := g.ns.imports[ns]
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if alias == '' {
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return name
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}
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return alias + '.' + name.split('.').last()
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}
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fn (mut g JsGen) js_name(name_ string) string {
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mut is_js := false
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mut name := name_
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if name.starts_with('JS.') {
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name = name[3..]
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is_js = true
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}
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ns := get_ns(name)
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name = if g.ns == 0 {
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name
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} else if ns == g.ns.name {
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name.split('.').last()
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} else {
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g.get_alias(name)
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}
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mut parts := name.split('.')
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if !is_js {
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for i, p in parts {
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if p in js.js_reserved {
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parts[i] = 'v_$p'
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}
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}
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}
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return parts.join('.')
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}
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fn (mut g JsGen) stmts(stmts []ast.Stmt) {
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g.inc_indent()
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for stmt in stmts {
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g.stmt(stmt)
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}
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g.dec_indent()
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}
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[inline]
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fn (mut g JsGen) write_v_source_line_info(pos token.Position) {
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// g.inside_ternary == 0 &&
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if g.pref.sourcemap {
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g.ns.sourcemap_helper << SourcemapHelper{
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src_path: util.vlines_escape_path(g.file.path, g.pref.ccompiler)
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src_line: u32(pos.line_nr + 1)
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ns_pos: u32(g.ns.out.len)
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}
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}
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if g.pref.is_vlines && g.is_vlines_enabled {
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g.write(' /* ${pos.line_nr + 1} $g.ns.out.len */ ')
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}
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}
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fn (mut g JsGen) gen_global_decl(node ast.GlobalDecl) {
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mod := if g.pref.build_mode == .build_module { 'enumerable: false' } else { 'enumerable: true' }
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for field in node.fields {
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if field.has_expr {
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tmp_var := g.new_tmp_var()
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g.write('const $tmp_var = ')
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g.expr(field.expr)
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g.writeln(';')
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g.writeln('Object.defineProperty(\$global,"$field.name", {
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configurable: false,
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$mod ,
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writable: true,
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value: $tmp_var
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}
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); // global')
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} else {
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// TODO(playXE): Initialize with default value of type
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}
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}
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}
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fn (mut g JsGen) stmt(node ast.Stmt) {
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g.stmt_start_pos = g.ns.out.len
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match node {
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ast.EmptyStmt {}
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ast.AsmStmt {
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panic('inline asm is not supported by js')
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}
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ast.AssertStmt {
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g.write_v_source_line_info(node.pos)
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g.gen_assert_stmt(node)
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}
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ast.AssignStmt {
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g.write_v_source_line_info(node.pos)
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g.gen_assign_stmt(node)
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}
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ast.Block {
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g.write_v_source_line_info(node.pos)
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g.gen_block(node)
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g.writeln('')
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}
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ast.BranchStmt {
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g.write_v_source_line_info(node.pos)
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g.gen_branch_stmt(node)
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}
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ast.CompFor {}
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ast.ConstDecl {
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g.write_v_source_line_info(node.pos)
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g.gen_const_decl(node)
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}
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ast.DeferStmt {
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g.defer_stmts << node
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}
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ast.EnumDecl {
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g.write_v_source_line_info(node.pos)
|
|
g.gen_enum_decl(node)
|
|
g.writeln('')
|
|
}
|
|
ast.ExprStmt {
|
|
g.write_v_source_line_info(node.pos)
|
|
g.gen_expr_stmt(node)
|
|
}
|
|
ast.FnDecl {
|
|
g.write_v_source_line_info(node.pos)
|
|
g.fn_decl = unsafe { &node }
|
|
g.gen_fn_decl(node)
|
|
}
|
|
ast.ForCStmt {
|
|
g.write_v_source_line_info(node.pos)
|
|
g.gen_for_c_stmt(node)
|
|
g.writeln('')
|
|
}
|
|
ast.ForInStmt {
|
|
g.write_v_source_line_info(node.pos)
|
|
g.gen_for_in_stmt(node)
|
|
g.writeln('')
|
|
}
|
|
ast.ForStmt {
|
|
g.write_v_source_line_info(node.pos)
|
|
g.gen_for_stmt(node)
|
|
g.writeln('')
|
|
}
|
|
ast.GlobalDecl {
|
|
g.write_v_source_line_info(node.pos)
|
|
g.gen_global_decl(node)
|
|
g.writeln('')
|
|
}
|
|
ast.GotoLabel {
|
|
g.write_v_source_line_info(node.pos)
|
|
g.writeln('${g.js_name(node.name)}:')
|
|
}
|
|
ast.GotoStmt {
|
|
// skip: JS has no goto
|
|
}
|
|
ast.HashStmt {
|
|
g.write_v_source_line_info(node.pos)
|
|
g.gen_hash_stmt(node)
|
|
}
|
|
ast.Import {
|
|
g.ns.imports[node.mod] = node.alias
|
|
}
|
|
ast.InterfaceDecl {
|
|
g.write_v_source_line_info(node.pos)
|
|
g.gen_interface_decl(node)
|
|
}
|
|
ast.Module {
|
|
// skip: namespacing implemented externally
|
|
}
|
|
ast.NodeError {}
|
|
ast.Return {
|
|
if g.defer_stmts.len > 0 {
|
|
g.gen_defer_stmts()
|
|
}
|
|
g.gen_return_stmt(node)
|
|
}
|
|
ast.SqlStmt {}
|
|
ast.StructDecl {
|
|
g.write_v_source_line_info(node.pos)
|
|
g.gen_struct_decl(node)
|
|
}
|
|
ast.TypeDecl {
|
|
// skip JS has no typedecl
|
|
}
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) expr(node ast.Expr) {
|
|
match node {
|
|
ast.NodeError {}
|
|
ast.EmptyExpr {}
|
|
ast.CTempVar {
|
|
g.write('/* ast.CTempVar: node.name */')
|
|
}
|
|
ast.DumpExpr {
|
|
g.write('/* ast.DumpExpr: $node.expr */')
|
|
}
|
|
ast.AnonFn {
|
|
g.gen_fn_decl(node.decl)
|
|
}
|
|
ast.ArrayInit {
|
|
g.gen_array_init_expr(node)
|
|
}
|
|
ast.AsCast {
|
|
// skip: JS has no types, so no need to cast
|
|
// TODO: Is jsdoc needed here for TS support?
|
|
}
|
|
ast.Assoc {
|
|
// TODO
|
|
}
|
|
ast.BoolLiteral {
|
|
if node.val == true {
|
|
g.write('true')
|
|
} else {
|
|
g.write('false')
|
|
}
|
|
}
|
|
ast.CallExpr {
|
|
g.gen_call_expr(node)
|
|
}
|
|
ast.ChanInit {
|
|
// TODO
|
|
}
|
|
ast.CastExpr {
|
|
g.gen_type_cast_expr(node)
|
|
}
|
|
ast.CharLiteral {
|
|
g.write("'$node.val'")
|
|
}
|
|
ast.Comment {}
|
|
ast.ConcatExpr {
|
|
// TODO
|
|
}
|
|
ast.EnumVal {
|
|
sym := g.table.get_type_symbol(node.typ)
|
|
styp := g.js_name(sym.name)
|
|
g.write('${styp}.$node.val')
|
|
}
|
|
ast.FloatLiteral {
|
|
g.gen_float_literal_expr(node)
|
|
}
|
|
ast.GoExpr {
|
|
g.gen_go_expr(node)
|
|
}
|
|
ast.Ident {
|
|
g.gen_ident(node)
|
|
}
|
|
ast.IfExpr {
|
|
g.gen_if_expr(node)
|
|
}
|
|
ast.IfGuardExpr {
|
|
// TODO no optionals yet
|
|
}
|
|
ast.IndexExpr {
|
|
g.gen_index_expr(node)
|
|
}
|
|
ast.InfixExpr {
|
|
g.gen_infix_expr(node)
|
|
}
|
|
ast.IntegerLiteral {
|
|
g.gen_integer_literal_expr(node)
|
|
}
|
|
ast.LockExpr {
|
|
g.gen_lock_expr(node)
|
|
}
|
|
ast.MapInit {
|
|
g.gen_map_init_expr(node)
|
|
}
|
|
ast.MatchExpr {
|
|
// TODO
|
|
}
|
|
ast.None {
|
|
// TODO
|
|
}
|
|
ast.OrExpr {
|
|
// TODO
|
|
}
|
|
ast.ParExpr {
|
|
g.write('(')
|
|
g.expr(node.expr)
|
|
g.write(')')
|
|
}
|
|
ast.PostfixExpr {
|
|
g.expr(node.expr)
|
|
g.write(node.op.str())
|
|
}
|
|
ast.PrefixExpr {
|
|
if node.op in [.amp, .mul] {
|
|
// C pointers/references: ignore them
|
|
if node.op == .amp {
|
|
type_sym := g.table.get_type_symbol(node.right_type)
|
|
|
|
if !type_sym.is_primitive() && !node.right_type.is_pointer() {
|
|
// kind of weird way to handle references but it allows us to access type methods easily.
|
|
g.write('(function(x) {')
|
|
g.write(' return { val: x, __proto__: Object.getPrototypeOf(x), valueOf: function() { return this.val; } }})( ')
|
|
g.expr(node.right)
|
|
g.write(')')
|
|
} else {
|
|
g.expr(node.right)
|
|
}
|
|
} else {
|
|
g.write('(')
|
|
g.expr(node.right)
|
|
g.write(').val')
|
|
}
|
|
} else {
|
|
g.write(node.op.str())
|
|
g.expr(node.right)
|
|
g.write('.valueOf()')
|
|
}
|
|
}
|
|
ast.RangeExpr {
|
|
// Only used in IndexExpr, requires index type info
|
|
}
|
|
ast.SelectExpr {
|
|
// TODO: to be implemented
|
|
}
|
|
ast.SelectorExpr {
|
|
g.gen_selector_expr(node)
|
|
}
|
|
ast.SizeOf, ast.IsRefType {
|
|
// TODO
|
|
}
|
|
ast.OffsetOf {
|
|
// TODO
|
|
}
|
|
ast.SqlExpr {
|
|
// TODO
|
|
}
|
|
ast.StringInterLiteral {
|
|
g.gen_string_inter_literal(node)
|
|
}
|
|
ast.StringLiteral {
|
|
g.gen_string_literal(node)
|
|
}
|
|
ast.StructInit {
|
|
// TODO: once generic fns/unwrap_generic is implemented
|
|
// if node.unresolved {
|
|
// g.expr(ast.resolve_init(node, g.unwrap_generic(node.typ), g.table))
|
|
// } else {
|
|
// // `user := User{name: 'Bob'}`
|
|
// g.gen_struct_init(node)
|
|
// }
|
|
// `user := User{name: 'Bob'}`
|
|
g.gen_struct_init(node)
|
|
}
|
|
ast.TypeNode {
|
|
// skip: JS has no types
|
|
// TODO maybe?
|
|
}
|
|
ast.Likely {
|
|
g.write('(')
|
|
g.expr(node.expr)
|
|
g.write(')')
|
|
}
|
|
ast.TypeOf {
|
|
g.gen_typeof_expr(node)
|
|
// TODO: Should this print the V type or the JS type?
|
|
}
|
|
ast.AtExpr {
|
|
g.write('"$node.val"')
|
|
}
|
|
ast.ComptimeCall {
|
|
// TODO
|
|
}
|
|
ast.ComptimeSelector {
|
|
// TODO
|
|
}
|
|
ast.UnsafeExpr {
|
|
g.expr(node.expr)
|
|
}
|
|
ast.ArrayDecompose {}
|
|
}
|
|
}
|
|
|
|
// TODO
|
|
fn (mut g JsGen) gen_assert_stmt(a ast.AssertStmt) {
|
|
if !a.is_used {
|
|
return
|
|
}
|
|
g.writeln('// assert')
|
|
g.write('if( ')
|
|
g.expr(a.expr)
|
|
g.write(' ) {')
|
|
s_assertion := a.expr.str().replace('"', "'")
|
|
mut mod_path := g.file.path.replace('\\', '\\\\')
|
|
if g.is_test {
|
|
g.writeln(' g_test_oks++;')
|
|
g.writeln(' cb_assertion_ok("$mod_path", ${a.pos.line_nr + 1}, "assert $s_assertion", "${g.fn_decl.name}()" );')
|
|
g.writeln('} else {')
|
|
g.writeln(' g_test_fails++;')
|
|
g.writeln(' cb_assertion_failed("$mod_path", ${a.pos.line_nr + 1}, "assert $s_assertion", "${g.fn_decl.name}()" );')
|
|
g.writeln(' exit(1);')
|
|
g.writeln('}')
|
|
return
|
|
}
|
|
g.writeln('} else {')
|
|
g.inc_indent()
|
|
g.writeln('builtin.eprintln("$mod_path:${a.pos.line_nr + 1}: FAIL: fn ${g.fn_decl.name}(): assert $s_assertion");')
|
|
g.writeln('builtin.exit(1);')
|
|
g.dec_indent()
|
|
g.writeln('}')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_assign_stmt(stmt ast.AssignStmt) {
|
|
if stmt.left.len > stmt.right.len {
|
|
// multi return
|
|
g.write('const [')
|
|
for i, left in stmt.left {
|
|
if !left.is_blank_ident() {
|
|
g.expr(left)
|
|
}
|
|
if i < stmt.left.len - 1 {
|
|
g.write(', ')
|
|
}
|
|
}
|
|
g.write('] = ')
|
|
g.expr(stmt.right[0])
|
|
g.writeln(';')
|
|
} else {
|
|
// `a := 1` | `a,b := 1,2`
|
|
for i, left in stmt.left {
|
|
mut op := stmt.op
|
|
if stmt.op == .decl_assign {
|
|
op = .assign
|
|
}
|
|
val := stmt.right[i]
|
|
mut is_mut := false
|
|
if left is ast.Ident {
|
|
is_mut = left.is_mut
|
|
if left.kind == .blank_ident || left.name in ['', '_'] {
|
|
tmp_var := g.new_tmp_var()
|
|
// TODO: Can the tmp_var declaration be omitted?
|
|
g.write('const $tmp_var = ')
|
|
g.expr(val)
|
|
g.writeln(';')
|
|
continue
|
|
}
|
|
}
|
|
mut styp := g.typ(stmt.left_types[i])
|
|
if !g.inside_loop && styp.len > 0 {
|
|
g.doc.gen_typ(styp)
|
|
}
|
|
if stmt.op == .decl_assign {
|
|
if g.inside_loop || is_mut {
|
|
g.write('let ')
|
|
} else {
|
|
g.write('const ')
|
|
}
|
|
}
|
|
g.expr(left)
|
|
mut is_ptr := false
|
|
if stmt.op == .assign && stmt.left_types[i].is_ptr() {
|
|
is_ptr = true
|
|
g.write('.val')
|
|
}
|
|
if g.inside_map_set && op == .assign {
|
|
g.inside_map_set = false
|
|
g.write(', ')
|
|
g.expr(val)
|
|
if is_ptr {
|
|
g.write('.val')
|
|
}
|
|
g.write(')')
|
|
} else {
|
|
g.write(' $op ')
|
|
// TODO: Multiple types??
|
|
should_cast :=
|
|
(g.table.type_kind(stmt.left_types.first()) in js.shallow_equatables)
|
|
&& (g.cast_stack.len <= 0 || stmt.left_types.first() != g.cast_stack.last())
|
|
|
|
if should_cast {
|
|
g.cast_stack << stmt.left_types.first()
|
|
if g.file.mod.name == 'builtin' {
|
|
g.write('new ')
|
|
}
|
|
g.write('${g.typ(stmt.left_types.first())}(')
|
|
}
|
|
g.expr(val)
|
|
if is_ptr {
|
|
g.write('.val')
|
|
}
|
|
if should_cast {
|
|
g.write(')')
|
|
g.cast_stack.delete_last()
|
|
}
|
|
}
|
|
if g.inside_loop {
|
|
g.write('; ')
|
|
} else {
|
|
g.writeln(';')
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_attrs(attrs []ast.Attr) {
|
|
for attr in attrs {
|
|
g.writeln('/* [$attr.name] */')
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_block(it ast.Block) {
|
|
g.writeln('{')
|
|
g.stmts(it.stmts)
|
|
g.writeln('}')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_branch_stmt(it ast.BranchStmt) {
|
|
// continue or break
|
|
g.write(it.kind.str())
|
|
g.writeln(';')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_const_decl(it ast.ConstDecl) {
|
|
for field in it.fields {
|
|
g.doc.gen_const(g.typ(field.typ))
|
|
if field.is_pub {
|
|
g.push_pub_var(field.name)
|
|
}
|
|
g.write('const ${g.js_name(field.name)} = ')
|
|
g.expr(field.expr)
|
|
g.writeln(';')
|
|
}
|
|
g.writeln('')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_defer_stmts() {
|
|
g.writeln('(function defer() {')
|
|
for defer_stmt in g.defer_stmts {
|
|
g.stmts(defer_stmt.stmts)
|
|
}
|
|
g.defer_stmts = []
|
|
g.writeln('})();')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_enum_decl(it ast.EnumDecl) {
|
|
g.doc.gen_enum()
|
|
g.writeln('const ${g.js_name(it.name)} = {')
|
|
g.inc_indent()
|
|
mut i := 0
|
|
for field in it.fields {
|
|
g.write('$field.name: ')
|
|
if field.has_expr && field.expr is ast.IntegerLiteral {
|
|
i = field.expr.val.int()
|
|
}
|
|
g.writeln('$i,')
|
|
i++
|
|
}
|
|
g.dec_indent()
|
|
g.writeln('};')
|
|
if it.is_pub {
|
|
g.push_pub_var(it.name)
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_expr_stmt(it ast.ExprStmt) {
|
|
g.expr(it.expr)
|
|
if !it.is_expr && it.expr !is ast.IfExpr && !g.inside_ternary {
|
|
g.writeln(';')
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_fn_decl(it ast.FnDecl) {
|
|
if it.no_body || it.is_method {
|
|
// Struct methods are handled by class generation code.
|
|
return
|
|
}
|
|
if g.inside_builtin {
|
|
g.builtin_fns << it.name
|
|
}
|
|
g.gen_method_decl(it)
|
|
}
|
|
|
|
fn fn_has_go(node ast.FnDecl) bool {
|
|
mut has_go := false
|
|
for stmt in node.stmts {
|
|
if stmt is ast.ExprStmt {
|
|
if stmt.expr is ast.GoExpr {
|
|
has_go = true
|
|
break
|
|
}
|
|
}
|
|
}
|
|
return has_go
|
|
}
|
|
|
|
fn (mut g JsGen) gen_method_decl(it ast.FnDecl) {
|
|
unsafe {
|
|
g.fn_decl = &it
|
|
}
|
|
has_go := fn_has_go(it)
|
|
is_main := it.name == 'main.main'
|
|
g.gen_attrs(it.attrs)
|
|
if is_main {
|
|
// there is no concept of main in JS but we do have iife
|
|
g.writeln('/* program entry point */')
|
|
|
|
g.write('(')
|
|
if has_go {
|
|
g.write('async ')
|
|
}
|
|
g.write('function(')
|
|
} else if it.is_anon {
|
|
g.write('function (')
|
|
} else {
|
|
mut name := g.js_name(it.name)
|
|
c := name[0]
|
|
if c in [`+`, `-`, `*`, `/`] {
|
|
name = util.replace_op(name)
|
|
}
|
|
// type_name := g.typ(it.return_type)
|
|
// generate jsdoc for the function
|
|
g.doc.gen_fn(it)
|
|
if has_go {
|
|
g.write('async ')
|
|
}
|
|
if !it.is_method {
|
|
g.write('function ')
|
|
} else {
|
|
if it.attrs.contains('js_getter') {
|
|
g.write('get ')
|
|
} else if it.attrs.contains('js_setter') {
|
|
g.write('set ')
|
|
}
|
|
}
|
|
g.write('${name}(')
|
|
if it.is_pub && !it.is_method {
|
|
g.push_pub_var(name)
|
|
}
|
|
}
|
|
mut args := it.params
|
|
if it.is_method {
|
|
args = args[1..]
|
|
}
|
|
g.fn_args(args, it.is_variadic)
|
|
if it.is_method {
|
|
if args.len > 0 {
|
|
g.write(', ')
|
|
}
|
|
g.write('${it.params[0].name} = this')
|
|
}
|
|
g.writeln(') {')
|
|
for i, arg in args {
|
|
is_varg := i == args.len - 1 && it.is_variadic
|
|
if is_varg {
|
|
name := g.js_name(arg.name)
|
|
g.writeln('$name = new array($name);')
|
|
}
|
|
}
|
|
g.stmts(it.stmts)
|
|
g.write('}')
|
|
if is_main {
|
|
g.write(')();')
|
|
}
|
|
if !it.is_anon && !it.is_method {
|
|
g.writeln('\n')
|
|
}
|
|
g.fn_decl = voidptr(0)
|
|
}
|
|
|
|
fn (mut g JsGen) fn_args(args []ast.Param, is_variadic bool) {
|
|
for i, arg in args {
|
|
name := g.js_name(arg.name)
|
|
is_varg := i == args.len - 1 && is_variadic
|
|
if is_varg {
|
|
g.write('...$name')
|
|
} else {
|
|
g.write(name)
|
|
}
|
|
// if its not the last argument
|
|
if i < args.len - 1 {
|
|
g.write(', ')
|
|
}
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_for_c_stmt(it ast.ForCStmt) {
|
|
g.inside_loop = true
|
|
g.write('for (')
|
|
if it.has_init {
|
|
g.stmt(it.init)
|
|
} else {
|
|
g.write('; ')
|
|
}
|
|
if it.has_cond {
|
|
g.expr(it.cond)
|
|
}
|
|
g.write('; ')
|
|
if it.has_inc {
|
|
g.stmt(it.inc)
|
|
}
|
|
g.writeln(') {')
|
|
g.stmts(it.stmts)
|
|
g.writeln('}')
|
|
g.inside_loop = false
|
|
}
|
|
|
|
fn (mut g JsGen) gen_for_in_stmt(it ast.ForInStmt) {
|
|
if it.is_range {
|
|
// `for x in 1..10 {`
|
|
mut i := it.val_var
|
|
if i in ['', '_'] {
|
|
i = g.new_tmp_var()
|
|
}
|
|
g.inside_loop = true
|
|
g.write('for (let $i = ')
|
|
g.expr(it.cond)
|
|
g.write('; $i < ')
|
|
g.expr(it.high)
|
|
g.writeln('; ++$i) {')
|
|
g.inside_loop = false
|
|
g.stmts(it.stmts)
|
|
g.writeln('}')
|
|
} else if it.kind in [.array, .string] || it.cond_type.has_flag(.variadic) {
|
|
// `for num in nums {`
|
|
val := if it.val_var in ['', '_'] { '_' } else { it.val_var }
|
|
// styp := g.typ(it.val_type)
|
|
if it.key_var.len > 0 {
|
|
g.write('for (const [$it.key_var, $val] of ')
|
|
if it.kind == .string {
|
|
g.write('Array.from(')
|
|
g.expr(it.cond)
|
|
if it.cond_type.is_ptr() {
|
|
g.write('.valueOf()')
|
|
}
|
|
g.write('.str.split(\'\').entries(), ([$it.key_var, $val]) => [$it.key_var, ')
|
|
if g.ns.name == 'builtin' {
|
|
g.write('new ')
|
|
}
|
|
g.write('byte($val)])')
|
|
} else {
|
|
g.expr(it.cond)
|
|
if it.cond_type.is_ptr() {
|
|
g.write('.valueOf()')
|
|
}
|
|
g.write('.entries()')
|
|
}
|
|
} else {
|
|
g.write('for (const $val of ')
|
|
g.expr(it.cond)
|
|
if it.cond_type.is_ptr() {
|
|
g.write('.valueOf()')
|
|
}
|
|
if it.kind == .string {
|
|
g.write(".str.split('')")
|
|
}
|
|
// cast characters to bytes
|
|
if val !in ['', '_'] && it.kind == .string {
|
|
g.write('.map(c => ')
|
|
if g.ns.name == 'builtin' {
|
|
g.write('new ')
|
|
}
|
|
g.write('byte(c))')
|
|
}
|
|
}
|
|
g.writeln(') {')
|
|
g.stmts(it.stmts)
|
|
g.writeln('}')
|
|
} else if it.kind == .map {
|
|
// `for key, val in map[string]int {`
|
|
// key_styp := g.typ(it.key_type)
|
|
// val_styp := g.typ(it.val_type)
|
|
key := if it.key_var in ['', '_'] { '' } else { it.key_var }
|
|
val := if it.val_var in ['', '_'] { '' } else { it.val_var }
|
|
g.write('for (let [$key, $val] of ')
|
|
g.expr(it.cond)
|
|
if it.cond_type.is_ptr() {
|
|
g.write('.valueOf()')
|
|
}
|
|
g.writeln(') {')
|
|
g.stmts(it.stmts)
|
|
g.writeln('}')
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_for_stmt(it ast.ForStmt) {
|
|
g.write('while (')
|
|
if it.is_inf {
|
|
g.write('true')
|
|
} else {
|
|
g.expr(it.cond)
|
|
}
|
|
g.writeln(') {')
|
|
g.stmts(it.stmts)
|
|
g.writeln('}')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_go_expr(node ast.GoExpr) {
|
|
// TODO Handle joinable expressions
|
|
// node.is_expr
|
|
mut name := node.call_expr.name
|
|
if node.call_expr.is_method {
|
|
receiver_sym := g.table.get_type_symbol(node.call_expr.receiver_type)
|
|
name = receiver_sym.name + '.' + name
|
|
}
|
|
// todo: please add a name feild without the mod name for ast.CallExpr
|
|
if name.starts_with('${node.call_expr.mod}.') {
|
|
name = name[node.call_expr.mod.len + 1..]
|
|
}
|
|
g.writeln('await new Promise(function(resolve){')
|
|
g.inc_indent()
|
|
g.write('${name}(')
|
|
for i, arg in node.call_expr.args {
|
|
g.expr(arg.expr)
|
|
if i < node.call_expr.args.len - 1 {
|
|
g.write(', ')
|
|
}
|
|
}
|
|
g.writeln(');')
|
|
g.writeln('resolve();')
|
|
g.dec_indent()
|
|
g.writeln('});')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_import_stmt(it ast.Import) {
|
|
g.ns.imports[it.mod] = it.alias
|
|
}
|
|
|
|
fn (mut g JsGen) gen_interface_decl(it ast.InterfaceDecl) {
|
|
// JS is dynamically typed, so we don't need any codegen at all
|
|
// We just need the JSDoc so TypeScript type checking works
|
|
g.doc.gen_interface(it)
|
|
// This is a hack to make the interface's type accessible outside its namespace
|
|
// TODO: interfaces are always `pub`?
|
|
name := g.js_name(it.name)
|
|
g.push_pub_var('/** @type $name */\n\t\t$name: undefined')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_return_stmt(it ast.Return) {
|
|
if it.exprs.len == 0 {
|
|
// Returns nothing
|
|
g.writeln('return;')
|
|
return
|
|
}
|
|
g.write('return ')
|
|
if it.exprs.len == 1 {
|
|
g.expr(it.exprs[0])
|
|
} else { // Multi return
|
|
g.gen_array_init_values(it.exprs)
|
|
}
|
|
g.writeln(';')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_hash_stmt(it ast.HashStmt) {
|
|
g.writeln(it.val)
|
|
}
|
|
|
|
fn (mut g JsGen) gen_struct_decl(node ast.StructDecl) {
|
|
mut name := node.name
|
|
if name.starts_with('JS.') {
|
|
return
|
|
}
|
|
if name in js.v_types && g.ns.name == 'builtin' {
|
|
return
|
|
}
|
|
js_name := g.js_name(name)
|
|
g.gen_attrs(node.attrs)
|
|
g.doc.gen_fac_fn(node.fields)
|
|
g.write('function ${js_name}({ ')
|
|
for i, field in node.fields {
|
|
g.write('$field.name = ')
|
|
if field.has_default_expr {
|
|
g.expr(field.default_expr)
|
|
} else {
|
|
g.write('${g.to_js_typ_val(field.typ)}')
|
|
}
|
|
if i < node.fields.len - 1 {
|
|
g.write(', ')
|
|
}
|
|
}
|
|
g.writeln(' }) {')
|
|
g.inc_indent()
|
|
for field in node.fields {
|
|
g.writeln('this.$field.name = $field.name')
|
|
}
|
|
g.dec_indent()
|
|
g.writeln('};')
|
|
g.writeln('${js_name}.prototype = {')
|
|
g.inc_indent()
|
|
for embed in node.embeds {
|
|
etyp := g.typ(embed.typ)
|
|
g.writeln('...${etyp}.prototype,')
|
|
}
|
|
fns := g.method_fn_decls[name]
|
|
for field in node.fields {
|
|
typ := g.typ(field.typ)
|
|
g.doc.gen_typ(typ)
|
|
g.write('$field.name: ${g.to_js_typ_val(field.typ)}')
|
|
g.writeln(',')
|
|
}
|
|
for cfn in fns {
|
|
g.gen_method_decl(cfn)
|
|
g.writeln(',')
|
|
}
|
|
// gen toString method
|
|
fn_names := fns.map(it.name)
|
|
if 'toString' !in fn_names {
|
|
g.writeln('toString() {')
|
|
g.inc_indent()
|
|
g.write('return `$js_name {')
|
|
for i, field in node.fields {
|
|
if i == 0 {
|
|
g.write(' ')
|
|
} else {
|
|
g.write(', ')
|
|
}
|
|
match g.typ(field.typ).split('.').last() {
|
|
'string' { g.write('$field.name: "\${this["$field.name"].toString()}"') }
|
|
else { g.write('$field.name: \${this["$field.name"].toString()} ') }
|
|
}
|
|
}
|
|
g.writeln('}`')
|
|
g.dec_indent()
|
|
g.writeln('}')
|
|
}
|
|
g.dec_indent()
|
|
g.writeln('};\n')
|
|
if node.is_pub {
|
|
g.push_pub_var(name)
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_array_init_expr(it ast.ArrayInit) {
|
|
// NB: Fixed arrays and regular arrays are handled the same, since fixed arrays:
|
|
// 1) Are only available for number types
|
|
// 2) Give the code unnecessary complexity
|
|
// 3) Have several limitations like missing most `Array.prototype` methods
|
|
// 4) Modern engines can optimize regular arrays into typed arrays anyways,
|
|
// offering similar performance
|
|
g.write('new array(')
|
|
g.inc_indent()
|
|
if it.has_len {
|
|
t1 := g.new_tmp_var()
|
|
t2 := g.new_tmp_var()
|
|
g.writeln('(function() {')
|
|
g.inc_indent()
|
|
g.writeln('const $t1 = [];')
|
|
g.write('for (let $t2 = 0; $t2 < ')
|
|
g.expr(it.len_expr)
|
|
g.writeln('; $t2++) {')
|
|
g.inc_indent()
|
|
g.write('${t1}.push(')
|
|
if it.has_default {
|
|
g.expr(it.default_expr)
|
|
} else {
|
|
// Fill the array with the default values for its type
|
|
t := g.to_js_typ_val(it.elem_type)
|
|
g.write(t)
|
|
}
|
|
g.writeln(');')
|
|
g.dec_indent()
|
|
g.writeln('};')
|
|
g.writeln('return $t1;')
|
|
g.dec_indent()
|
|
g.write('})()')
|
|
} else {
|
|
g.gen_array_init_values(it.exprs)
|
|
}
|
|
g.dec_indent()
|
|
g.write(')')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_array_init_values(exprs []ast.Expr) {
|
|
g.write('[')
|
|
for i, expr in exprs {
|
|
g.expr(expr)
|
|
if i < exprs.len - 1 {
|
|
g.write(', ')
|
|
}
|
|
}
|
|
g.write(']')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_call_expr(it ast.CallExpr) {
|
|
g.call_stack << it
|
|
mut name := g.js_name(it.name)
|
|
call_return_is_optional := it.return_type.has_flag(.optional)
|
|
if call_return_is_optional {
|
|
g.writeln('(function(){')
|
|
g.inc_indent()
|
|
g.writeln('try {')
|
|
g.inc_indent()
|
|
g.write('return builtin.unwrap(')
|
|
}
|
|
g.expr(it.left)
|
|
if it.is_method { // foo.bar.baz()
|
|
sym := g.table.get_type_symbol(it.receiver_type)
|
|
g.write('.')
|
|
if sym.kind == .array && it.name in ['map', 'filter'] {
|
|
// Prevent 'it' from getting shadowed inside the match
|
|
node := it
|
|
g.write(it.name)
|
|
g.write('(')
|
|
expr := node.args[0].expr
|
|
match expr {
|
|
ast.AnonFn {
|
|
g.gen_fn_decl(expr.decl)
|
|
g.write(')')
|
|
return
|
|
}
|
|
ast.Ident {
|
|
if expr.kind == .function {
|
|
g.write(g.js_name(expr.name))
|
|
g.write(')')
|
|
return
|
|
} else if expr.kind == .variable {
|
|
v_sym := g.table.get_type_symbol(expr.var_info().typ)
|
|
if v_sym.kind == .function {
|
|
g.write(g.js_name(expr.name))
|
|
g.write(')')
|
|
return
|
|
}
|
|
}
|
|
}
|
|
else {}
|
|
}
|
|
g.write('it => ')
|
|
g.expr(node.args[0].expr)
|
|
g.write(')')
|
|
return
|
|
}
|
|
} else {
|
|
if name in g.builtin_fns {
|
|
g.write('builtin.')
|
|
}
|
|
}
|
|
g.write('${name}(')
|
|
for i, arg in it.args {
|
|
g.expr(arg.expr)
|
|
if i != it.args.len - 1 {
|
|
g.write(', ')
|
|
}
|
|
}
|
|
// end method call
|
|
g.write(')')
|
|
if call_return_is_optional {
|
|
// end unwrap
|
|
g.writeln(')')
|
|
g.dec_indent()
|
|
// begin catch block
|
|
g.writeln('} catch(err) {')
|
|
g.inc_indent()
|
|
// gen or block contents
|
|
match it.or_block.kind {
|
|
.block {
|
|
if it.or_block.stmts.len > 1 {
|
|
g.stmts(it.or_block.stmts[..it.or_block.stmts.len - 1])
|
|
}
|
|
g.write('return ')
|
|
g.stmt(it.or_block.stmts.last())
|
|
}
|
|
.propagate {
|
|
panicstr := '`optional not set (\${err})`'
|
|
if g.file.mod.name == 'main' && g.fn_decl.name == 'main.main' {
|
|
g.writeln('return builtin.panic($panicstr)')
|
|
} else {
|
|
g.writeln('builtin.js_throw(err)')
|
|
}
|
|
}
|
|
else {}
|
|
}
|
|
// end catch
|
|
g.dec_indent()
|
|
g.writeln('}')
|
|
// end anon fn
|
|
g.dec_indent()
|
|
g.write('})()')
|
|
}
|
|
g.call_stack.delete_last()
|
|
}
|
|
|
|
fn (mut g JsGen) gen_ident(node ast.Ident) {
|
|
mut name := g.js_name(node.name)
|
|
if node.kind == .blank_ident || name in ['', '_'] {
|
|
name = g.new_tmp_var()
|
|
}
|
|
// TODO `is`
|
|
// TODO handle optionals
|
|
g.write(name)
|
|
|
|
// TODO: Generate .val for basic types
|
|
}
|
|
|
|
fn (mut g JsGen) gen_lock_expr(node ast.LockExpr) {
|
|
// TODO: implement this
|
|
}
|
|
|
|
fn (mut g JsGen) gen_if_expr(node ast.IfExpr) {
|
|
if node.is_comptime {
|
|
g.comp_if(node)
|
|
return
|
|
}
|
|
type_sym := g.table.get_type_symbol(node.typ)
|
|
// one line ?:
|
|
if node.is_expr && node.branches.len >= 2 && node.has_else && type_sym.kind != .void {
|
|
// `x := if a > b { } else if { } else { }`
|
|
g.write('(')
|
|
g.inside_ternary = true
|
|
for i, branch in node.branches {
|
|
if i > 0 {
|
|
g.write(' : ')
|
|
}
|
|
if i < node.branches.len - 1 || !node.has_else {
|
|
g.expr(branch.cond)
|
|
g.write('.valueOf()')
|
|
g.write(' ? ')
|
|
}
|
|
g.stmts(branch.stmts)
|
|
}
|
|
g.inside_ternary = false
|
|
g.write(')')
|
|
} else {
|
|
// mut is_guard = false
|
|
for i, branch in node.branches {
|
|
if i == 0 {
|
|
match branch.cond {
|
|
ast.IfGuardExpr {
|
|
// TODO optionals
|
|
}
|
|
else {
|
|
g.write('if (')
|
|
if '$branch.cond' == 'js' {
|
|
g.write('true')
|
|
} else {
|
|
g.expr(branch.cond)
|
|
g.write('.valueOf()')
|
|
}
|
|
g.writeln(') {')
|
|
}
|
|
}
|
|
} else if i < node.branches.len - 1 || !node.has_else {
|
|
g.write('} else if (')
|
|
g.expr(branch.cond)
|
|
g.write('.valueOf()')
|
|
g.writeln(') {')
|
|
} else if i == node.branches.len - 1 && node.has_else {
|
|
/*
|
|
if is_guard {
|
|
//g.writeln('} if (!$guard_ok) { /* else */')
|
|
} else {
|
|
*/
|
|
g.writeln('} else {')
|
|
// }
|
|
}
|
|
g.stmts(branch.stmts)
|
|
}
|
|
/*
|
|
if is_guard {
|
|
g.write('}')
|
|
}
|
|
*/
|
|
g.writeln('}')
|
|
g.writeln('')
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_index_expr(expr ast.IndexExpr) {
|
|
left_typ := g.table.get_type_symbol(expr.left_type)
|
|
// TODO: Handle splice setting if it's implemented
|
|
if expr.index is ast.RangeExpr {
|
|
g.expr(expr.left)
|
|
if expr.left_type.is_ptr() {
|
|
g.write('.val')
|
|
}
|
|
g.write('.slice(')
|
|
if expr.index.has_low {
|
|
g.expr(expr.index.low)
|
|
} else {
|
|
g.write('0')
|
|
}
|
|
g.write(', ')
|
|
if expr.index.has_high {
|
|
g.expr(expr.index.high)
|
|
} else {
|
|
g.expr(expr.left)
|
|
if expr.left_type.is_ptr() {
|
|
g.write('.val')
|
|
}
|
|
g.write('.length')
|
|
}
|
|
g.write(')')
|
|
} else if left_typ.kind == .map {
|
|
g.expr(expr.left)
|
|
if expr.is_setter {
|
|
g.inside_map_set = true
|
|
g.write('.map.set(')
|
|
} else {
|
|
g.write('.map.get(')
|
|
}
|
|
g.expr(expr.index)
|
|
g.write('.toString()')
|
|
if !expr.is_setter {
|
|
g.write(')')
|
|
}
|
|
} else if left_typ.kind == .string {
|
|
if expr.is_setter {
|
|
// TODO: What's the best way to do this?
|
|
// 'string'[3] = `o`
|
|
} else {
|
|
// TODO: Maybe use u16 there? JS String returns values up to 2^16-1
|
|
g.write('new byte(')
|
|
g.expr(expr.left)
|
|
if expr.left_type.is_ptr() {
|
|
g.write('.val')
|
|
}
|
|
g.write('.str.charCodeAt(')
|
|
g.expr(expr.index)
|
|
g.write('))')
|
|
}
|
|
} else {
|
|
// TODO Does this cover all cases?
|
|
g.expr(expr.left)
|
|
if expr.left_type.is_ptr() {
|
|
g.write('.val')
|
|
}
|
|
g.write('.arr')
|
|
g.write('[')
|
|
g.cast_stack << ast.int_type_idx
|
|
g.expr(expr.index)
|
|
g.cast_stack.delete_last()
|
|
g.write(']')
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_infix_expr(it ast.InfixExpr) {
|
|
l_sym := g.table.get_type_symbol(it.left_type)
|
|
r_sym := g.table.get_type_symbol(it.right_type)
|
|
|
|
is_not := it.op in [.not_in, .not_is, .ne]
|
|
if is_not {
|
|
g.write('!(')
|
|
}
|
|
|
|
if it.op == .eq || it.op == .ne {
|
|
// Shallow equatables
|
|
if l_sym.kind in js.shallow_equatables && r_sym.kind in js.shallow_equatables {
|
|
g.expr(it.left)
|
|
g.write('.eq(')
|
|
g.cast_stack << int(l_sym.kind)
|
|
g.expr(it.right)
|
|
g.cast_stack.delete_last()
|
|
g.write(')')
|
|
} else {
|
|
g.write('vEq(')
|
|
g.expr(it.left)
|
|
g.write(', ')
|
|
g.expr(it.right)
|
|
g.write(')')
|
|
}
|
|
} else if l_sym.kind == .array && it.op == .left_shift { // arr << 1
|
|
g.write('Array.prototype.push.call(')
|
|
g.expr(it.left)
|
|
g.write('.arr,')
|
|
// arr << [1, 2]
|
|
if r_sym.kind == .array {
|
|
g.write('...')
|
|
}
|
|
g.expr(it.right)
|
|
g.write(')')
|
|
} else if r_sym.kind in [.array, .map, .string] && it.op in [.key_in, .not_in] {
|
|
g.expr(it.right)
|
|
if r_sym.kind == .map {
|
|
g.write('.map.has(')
|
|
} else if r_sym.kind == .string {
|
|
g.write('.str.includes(')
|
|
} else {
|
|
g.write('.arr.includes(')
|
|
}
|
|
g.expr(it.left)
|
|
if l_sym.kind == .string {
|
|
g.write('.str')
|
|
}
|
|
g.write(')')
|
|
} else if it.op in [.key_is, .not_is] { // foo is Foo
|
|
g.expr(it.left)
|
|
g.write(' instanceof ')
|
|
g.write(g.typ(it.right_type))
|
|
} else {
|
|
is_arithmetic := it.op in [token.Kind.plus, .minus, .mul, .div, .mod]
|
|
mut needs_cast := is_arithmetic && it.left_type != it.right_type
|
|
mut greater_typ := 0
|
|
if needs_cast {
|
|
greater_typ = g.greater_typ(it.left_type, it.right_type)
|
|
if g.cast_stack.len > 0 {
|
|
needs_cast = g.cast_stack.last() != greater_typ
|
|
}
|
|
}
|
|
|
|
if needs_cast {
|
|
if g.ns.name == 'builtin' {
|
|
g.write('new ')
|
|
}
|
|
g.write('${g.typ(greater_typ)}(')
|
|
g.cast_stack << greater_typ
|
|
}
|
|
g.expr(it.left)
|
|
g.write(' $it.op ')
|
|
g.expr(it.right)
|
|
|
|
if needs_cast {
|
|
g.cast_stack.delete_last()
|
|
g.write(')')
|
|
}
|
|
}
|
|
|
|
if is_not {
|
|
g.write(')')
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) greater_typ(left ast.Type, right ast.Type) ast.Type {
|
|
l := int(left)
|
|
r := int(right)
|
|
lr := [l, r]
|
|
if ast.string_type_idx in lr {
|
|
return ast.Type(ast.string_type_idx)
|
|
}
|
|
should_float := (l in ast.integer_type_idxs && r in ast.float_type_idxs)
|
|
|| (r in ast.integer_type_idxs && l in ast.float_type_idxs)
|
|
if should_float {
|
|
if ast.f64_type_idx in lr {
|
|
return ast.Type(ast.f64_type_idx)
|
|
}
|
|
if ast.f32_type_idx in lr {
|
|
return ast.Type(ast.f32_type_idx)
|
|
}
|
|
return ast.Type(ast.float_literal_type)
|
|
}
|
|
should_int := (l in ast.integer_type_idxs && r in ast.integer_type_idxs)
|
|
if should_int {
|
|
// cant add to u64 - if (ast.u64_type_idx in lr) { return ast.Type(ast.u64_type_idx) }
|
|
// just guessing this order
|
|
if ast.i64_type_idx in lr {
|
|
return ast.Type(ast.i64_type_idx)
|
|
}
|
|
if ast.u32_type_idx in lr {
|
|
return ast.Type(ast.u32_type_idx)
|
|
}
|
|
if ast.int_type_idx in lr {
|
|
return ast.Type(ast.int_type_idx)
|
|
}
|
|
if ast.u16_type_idx in lr {
|
|
return ast.Type(ast.u16_type_idx)
|
|
}
|
|
if ast.i16_type_idx in lr {
|
|
return ast.Type(ast.i16_type_idx)
|
|
}
|
|
if ast.byte_type_idx in lr {
|
|
return ast.Type(ast.byte_type_idx)
|
|
}
|
|
if ast.i8_type_idx in lr {
|
|
return ast.Type(ast.i8_type_idx)
|
|
}
|
|
return ast.Type(ast.int_literal_type_idx)
|
|
}
|
|
return ast.Type(l)
|
|
}
|
|
|
|
fn (mut g JsGen) gen_map_init_expr(it ast.MapInit) {
|
|
// key_typ_sym := g.table.get_type_symbol(it.key_type)
|
|
// value_typ_sym := g.table.get_type_symbol(it.value_type)
|
|
// key_typ_str := util.no_dots(key_typ_sym.name)
|
|
// value_typ_str := util.no_dots(value_typ_sym.name)
|
|
g.writeln('new map(')
|
|
g.inc_indent()
|
|
if it.vals.len > 0 {
|
|
g.writeln('new Map([')
|
|
g.inc_indent()
|
|
for i, key in it.keys {
|
|
val := it.vals[i]
|
|
g.write('[')
|
|
g.expr(key)
|
|
g.write(', ')
|
|
g.expr(val)
|
|
g.write(']')
|
|
if i < it.keys.len - 1 {
|
|
g.write(',')
|
|
}
|
|
g.writeln('')
|
|
}
|
|
g.dec_indent()
|
|
g.write('])')
|
|
} else {
|
|
g.write('new Map()')
|
|
}
|
|
g.dec_indent()
|
|
g.write(')')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_selector_expr(it ast.SelectorExpr) {
|
|
g.expr(it.expr)
|
|
if it.expr_type.is_ptr() {
|
|
g.write('.valueOf()')
|
|
}
|
|
g.write('.$it.field_name')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_string_inter_literal(it ast.StringInterLiteral) {
|
|
should_cast := !(g.cast_stack.len > 0 && g.cast_stack.last() == ast.string_type_idx)
|
|
if should_cast {
|
|
if g.file.mod.name == 'builtin' {
|
|
g.write('new ')
|
|
}
|
|
g.write('string(')
|
|
}
|
|
g.write('`')
|
|
for i, val in it.vals {
|
|
escaped_val := val.replace('`', '\\`')
|
|
g.write(escaped_val)
|
|
if i >= it.exprs.len {
|
|
continue
|
|
}
|
|
expr := it.exprs[i]
|
|
fmt := it.fmts[i]
|
|
fwidth := it.fwidths[i]
|
|
precision := it.precisions[i]
|
|
g.write('\${')
|
|
if fmt != `_` || fwidth != 0 || precision != 987698 {
|
|
// TODO: Handle formatting
|
|
g.expr(expr)
|
|
} else {
|
|
sym := g.table.get_type_symbol(it.expr_types[i])
|
|
g.expr(expr)
|
|
if sym.kind == .struct_ && sym.has_method('str') {
|
|
g.write('.str()')
|
|
}
|
|
}
|
|
g.write('}')
|
|
}
|
|
g.write('`')
|
|
if should_cast {
|
|
g.write(')')
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_string_literal(it ast.StringLiteral) {
|
|
text := it.val.replace("'", "\\'")
|
|
should_cast := !(g.cast_stack.len > 0 && g.cast_stack.last() == ast.string_type_idx)
|
|
if true || should_cast {
|
|
if g.file.mod.name == 'builtin' {
|
|
g.write('new ')
|
|
}
|
|
g.write('string(')
|
|
}
|
|
g.write("'$text'")
|
|
if true || should_cast {
|
|
g.write(')')
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_struct_init(it ast.StructInit) {
|
|
type_sym := g.table.get_type_symbol(it.typ)
|
|
name := type_sym.name
|
|
if it.fields.len == 0 {
|
|
g.write('new ${g.js_name(name)}({})')
|
|
} else {
|
|
g.writeln('new ${g.js_name(name)}({')
|
|
g.inc_indent()
|
|
for i, field in it.fields {
|
|
g.write('$field.name: ')
|
|
g.expr(field.expr)
|
|
if i < it.fields.len - 1 {
|
|
g.write(',')
|
|
}
|
|
g.writeln('')
|
|
}
|
|
g.dec_indent()
|
|
g.write('})')
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_typeof_expr(it ast.TypeOf) {
|
|
sym := g.table.get_type_symbol(it.expr_type)
|
|
if sym.kind == .sum_type {
|
|
// TODO: JS sumtypes not implemented yet
|
|
} else if sym.kind == .array_fixed {
|
|
fixed_info := sym.info as ast.ArrayFixed
|
|
typ_name := g.table.get_type_name(fixed_info.elem_type)
|
|
g.write('"[$fixed_info.size]$typ_name"')
|
|
} else if sym.kind == .function {
|
|
info := sym.info as ast.FnType
|
|
fn_info := info.func
|
|
mut repr := 'fn ('
|
|
for i, arg in fn_info.params {
|
|
if i > 0 {
|
|
repr += ', '
|
|
}
|
|
repr += g.table.get_type_name(arg.typ)
|
|
}
|
|
repr += ')'
|
|
if fn_info.return_type != ast.void_type {
|
|
repr += ' ${g.table.get_type_name(fn_info.return_type)}'
|
|
}
|
|
g.write('"$repr"')
|
|
} else {
|
|
g.write('"$sym.name"')
|
|
}
|
|
}
|
|
|
|
fn (mut g JsGen) gen_type_cast_expr(it ast.CastExpr) {
|
|
is_literal := ((it.expr is ast.IntegerLiteral && it.typ in ast.integer_type_idxs)
|
|
|| (it.expr is ast.FloatLiteral && it.typ in ast.float_type_idxs))
|
|
// Skip cast if type is the same as the parrent caster
|
|
if g.cast_stack.len > 0 && is_literal {
|
|
if it.typ == g.cast_stack[g.cast_stack.len - 1] {
|
|
return
|
|
}
|
|
}
|
|
g.cast_stack << it.typ
|
|
typ := g.typ(it.typ)
|
|
if !is_literal {
|
|
if typ !in js.v_types || g.ns.name == 'builtin' {
|
|
g.write('new ')
|
|
}
|
|
g.write('${typ}(')
|
|
}
|
|
g.expr(it.expr)
|
|
if typ == 'string' && it.expr !is ast.StringLiteral {
|
|
g.write('.toString()')
|
|
}
|
|
if !is_literal {
|
|
g.write(')')
|
|
}
|
|
g.cast_stack.delete_last()
|
|
}
|
|
|
|
fn (mut g JsGen) gen_integer_literal_expr(it ast.IntegerLiteral) {
|
|
typ := ast.Type(ast.int_type)
|
|
|
|
// Don't wrap integers for use in JS.foo functions.
|
|
// TODO: call.language always seems to be "v", parser bug?
|
|
if g.call_stack.len > 0 {
|
|
call := g.call_stack[g.call_stack.len - 1]
|
|
if call.language == .js {
|
|
for t in call.args {
|
|
if t.expr is ast.IntegerLiteral {
|
|
if t.expr == it {
|
|
g.write(it.val)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Skip cast if type is the same as the parrent caster
|
|
if g.cast_stack.len > 0 {
|
|
if g.cast_stack[g.cast_stack.len - 1] in ast.integer_type_idxs {
|
|
g.write('$it.val')
|
|
return
|
|
}
|
|
}
|
|
|
|
if g.ns.name == 'builtin' {
|
|
g.write('new ')
|
|
}
|
|
|
|
g.write('${g.typ(typ)}($it.val)')
|
|
}
|
|
|
|
fn (mut g JsGen) gen_float_literal_expr(it ast.FloatLiteral) {
|
|
typ := ast.Type(ast.f32_type)
|
|
|
|
// Don't wrap integers for use in JS.foo functions.
|
|
// TODO: call.language always seems to be "v", parser bug?
|
|
if g.call_stack.len > 0 {
|
|
call := g.call_stack[g.call_stack.len - 1]
|
|
// if call.language == .js {
|
|
for i, t in call.args {
|
|
if t.expr is ast.FloatLiteral {
|
|
if t.expr == it {
|
|
if call.expected_arg_types[i] in ast.integer_type_idxs {
|
|
g.write(int(it.val.f64()).str())
|
|
} else {
|
|
g.write(it.val)
|
|
}
|
|
return
|
|
}
|
|
}
|
|
}
|
|
//}
|
|
}
|
|
|
|
// Skip cast if type is the same as the parrent caster
|
|
if g.cast_stack.len > 0 {
|
|
if g.cast_stack[g.cast_stack.len - 1] in ast.float_type_idxs {
|
|
g.write('$it.val')
|
|
return
|
|
} else if g.cast_stack[g.cast_stack.len - 1] in ast.integer_type_idxs {
|
|
g.write(int(it.val.f64()).str())
|
|
return
|
|
}
|
|
}
|
|
|
|
if g.ns.name == 'builtin' {
|
|
g.write('new ')
|
|
}
|
|
|
|
g.write('${g.typ(typ)}($it.val)')
|
|
}
|
|
|
|
fn (mut g JsGen) unwrap_generic(typ ast.Type) ast.Type {
|
|
if typ.has_flag(.generic) {
|
|
if t_typ := g.table.resolve_generic_to_concrete(typ, g.table.cur_fn.generic_names,
|
|
g.table.cur_concrete_types)
|
|
{
|
|
return t_typ
|
|
}
|
|
}
|
|
return typ
|
|
}
|