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v.gen.js: support global declarations in the JS backend (#10773)

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playX 2021-07-13 15:36:06 +03:00 committed by GitHub
parent d444dbd4d9
commit ee00d80931
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1 changed files with 28 additions and 1 deletions
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29
vlib/v/gen/js/js.v
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@ -105,6 +105,7 @@ pub fn gen(files []&ast.File, table &ast.Table, pref &pref.Preferences) string {
g.find_class_methods(file.stmts)
g.escape_namespace()
}
for file in files {
g.file = file
g.enter_namespace(g.file.mod.name)
@ -120,6 +121,7 @@ pub fn gen(files []&ast.File, table &ast.Table, pref &pref.Preferences) string {
g.gen_builtin_type_defs()
g.generated_builtin = true
}
g.stmts(file.stmts)
// store the current namespace
g.escape_namespace()
@ -292,6 +294,7 @@ pub fn (mut g JsGen) init() {
g.definitions.writeln('// Generated by the V compiler\n')
g.definitions.writeln('"use strict";')
g.definitions.writeln('')
g.definitions.writeln('var \$global = (new Function("return this"))();')
}
pub fn (g JsGen) hashes() string {
@ -418,6 +421,27 @@ fn (mut g JsGen) write_v_source_line_info(pos token.Position) {
}
}
fn (mut g JsGen) gen_global_decl(node ast.GlobalDecl) {
mod := if g.pref.build_mode == .build_module { 'enumerable: false' } else { 'enumerable: true' }
for field in node.fields {
if field.has_expr {
tmp_var := g.new_tmp_var()
g.write('const $tmp_var = ')
g.expr(field.expr)
g.writeln(';')
g.writeln('Object.defineProperty(\$global,"$field.name", {
configurable: false,
$mod ,
writable: true,
value: $tmp_var
}
); // global')
} else {
// TODO(playXE): Initialize with default value of type
}
}
}
fn (mut g JsGen) stmt(node ast.Stmt) {
g.stmt_start_pos = g.ns.out.len
match node {
@ -480,7 +504,9 @@ fn (mut g JsGen) stmt(node ast.Stmt) {
g.writeln('')
}
ast.GlobalDecl {
// TODO
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)
@ -903,6 +929,7 @@ fn (mut g JsGen) gen_method_decl(it ast.FnDecl) {
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 ')