TODO#139890　FAQ 常見問題 1－文案調整

HelenHuang

2022-06-09 23b60dc1975db38c280d8a123aff97544d1673e0

 PAMapp/node_modules/terser-webpack-plugin/node_modules/terser/lib/parse.js

@@ -1222,7 +1222,7 @@
            }
            if (S.token.value == "import" && !is_token(peek(), "punc", "(") && !is_token(peek(), "punc", ".")) {
                next();
                var node = import_();
                var node = import_statement();
                semicolon();
                return node;
            }
@@ -1374,7 +1374,7 @@
              case "export":
                if (!is_token(peek(), "punc", "(")) {
                    next();
                    var node = export_();
                    var node = export_statement();
                    if (is("punc", ";")) semicolon();
                    return node;
                }
@@ -1572,66 +1572,66 @@
        });
    };

    function track_used_binding_identifiers(is_parameter, strict) {
        var parameters = new Set();
        var duplicate = false;
        var default_assignment = false;
        var spread = false;
        var strict_mode = !!strict;
        var tracker = {
            add_parameter: function(token) {
                if (parameters.has(token.value)) {
                    if (duplicate === false) {
                        duplicate = token;
                    }
                    tracker.check_strict();
                } else {
                    parameters.add(token.value);
                    if (is_parameter) {
                        switch (token.value) {
                          case "arguments":
                          case "eval":
                          case "yield":
                            if (strict_mode) {
                                token_error(token, "Unexpected " + token.value + " identifier as parameter inside strict mode");
                            }
                            break;
                          default:
                            if (RESERVED_WORDS.has(token.value)) {
                                unexpected();
                            }
    class UsedParametersTracker {
        constructor(is_parameter, strict, duplicates_ok = false) {
            this.is_parameter = is_parameter;
            this.duplicates_ok = duplicates_ok;
            this.parameters = new Set();
            this.duplicate = null;
            this.default_assignment = false;
            this.spread = false;
            this.strict_mode = !!strict;
        }
        add_parameter(token) {
            if (this.parameters.has(token.value)) {
                if (this.duplicate === null) {
                    this.duplicate = token;
                }
                this.check_strict();
            } else {
                this.parameters.add(token.value);
                if (this.is_parameter) {
                    switch (token.value) {
                      case "arguments":
                      case "eval":
                      case "yield":
                        if (this.strict_mode) {
                            token_error(token, "Unexpected " + token.value + " identifier as parameter inside strict mode");
                        }
                        break;
                      default:
                        if (RESERVED_WORDS.has(token.value)) {
                            unexpected();
                        }
                    }
                }
            },
            mark_default_assignment: function(token) {
                if (default_assignment === false) {
                    default_assignment = token;
                }
            },
            mark_spread: function(token) {
                if (spread === false) {
                    spread = token;
                }
            },
            mark_strict_mode: function() {
                strict_mode = true;
            },
            is_strict: function() {
                return default_assignment !== false || spread !== false || strict_mode;
            },
            check_strict: function() {
                if (tracker.is_strict() && duplicate !== false) {
                    token_error(duplicate, "Parameter " + duplicate.value + " was used already");
                }
            }
        };

        return tracker;
        }
        mark_default_assignment(token) {
            if (this.default_assignment === false) {
                this.default_assignment = token;
            }
        }
        mark_spread(token) {
            if (this.spread === false) {
                this.spread = token;
            }
        }
        mark_strict_mode() {
            this.strict_mode = true;
        }
        is_strict() {
            return this.default_assignment !== false || this.spread !== false || this.strict_mode;
        }
        check_strict() {
            if (this.is_strict() && this.duplicate !== null && !this.duplicates_ok) {
                token_error(this.duplicate, "Parameter " + this.duplicate.value + " was used already");
            }
        }
    }

    function parameters(params) {
        var used_parameters = track_used_binding_identifiers(true, S.input.has_directive("use strict"));
        var used_parameters = new UsedParametersTracker(true, S.input.has_directive("use strict"));

        expect("(");

@@ -1655,7 +1655,7 @@
        var param;
        var expand = false;
        if (used_parameters === undefined) {
            used_parameters = track_used_binding_identifiers(true, S.input.has_directive("use strict"));
            used_parameters = new UsedParametersTracker(true, S.input.has_directive("use strict"));
        }
        if (is("expand", "...")) {
            expand = S.token;
@@ -1698,7 +1698,9 @@
        var expand_token;
        var first_token = S.token;
        if (used_parameters === undefined) {
            used_parameters = track_used_binding_identifiers(false, S.input.has_directive("use strict"));
            const strict = S.input.has_directive("use strict");
            const duplicates_ok = symbol_type === AST_SymbolVar;
            used_parameters = new UsedParametersTracker(false, strict, duplicates_ok);
        }
        symbol_type = symbol_type === undefined ? AST_SymbolFunarg : symbol_type;
        if (is("punc", "[")) {
@@ -2091,7 +2093,7 @@
            if (is("punc", "{") || is("punc", "[")) {
                def = new AST_VarDef({
                    start: S.token,
                    name: binding_element(undefined ,sym_type),
                    name: binding_element(undefined, sym_type),
                    value: is("operator", "=") ? (expect_token("operator", "="), expression(false, no_in)) : null,
                    end: prev()
                });
@@ -2551,7 +2553,7 @@
        };

        const is_not_method_start = () =>
            !is("punc", "(") && !is("punc", ",") && !is("punc", "}") && !is("operator", "=");
            !is("punc", "(") && !is("punc", ",") && !is("punc", "}") && !is("punc", ";") && !is("operator", "=");

        var is_async = false;
        var is_static = false;
@@ -2666,7 +2668,15 @@
        }
    }

    function import_() {
    function maybe_import_assertion() {
        if (is("name", "assert") && !has_newline_before(S.token)) {
            next();
            return object_or_destructuring_();
        }
        return null;
    }

    function import_statement() {
        var start = prev();

        var imported_name;
@@ -2689,16 +2699,20 @@
            unexpected();
        }
        next();

        const assert_clause = maybe_import_assertion();

        return new AST_Import({
            start: start,
            imported_name: imported_name,
            imported_names: imported_names,
            start,
            imported_name,
            imported_names,
            module_name: new AST_String({
                start: mod_str,
                value: mod_str.value,
                quote: mod_str.quote,
                end: mod_str,
            }),
            assert_clause,
            end: S.token,
        });
    }
@@ -2806,7 +2820,7 @@
        return names;
    }

    function export_() {
    function export_statement() {
        var start = S.token;
        var is_default;
        var exported_names;
@@ -2824,6 +2838,8 @@
                }
                next();

                const assert_clause = maybe_import_assertion();

                return new AST_Export({
                    start: start,
                    is_default: is_default,
@@ -2835,6 +2851,7 @@
                        end: mod_str,
                    }),
                    end: prev(),
                    assert_clause
                });
            } else {
                return new AST_Export({
@@ -2880,6 +2897,7 @@
            exported_value: exported_value,
            exported_definition: exported_definition,
            end: prev(),
            assert_clause: null
        });
    }