diff --git a/src/vs/editor/common/model/tokensStore.ts b/src/vs/editor/common/model/tokensStore.ts
index f464c9a40e3..4f209036e54 100644
--- a/src/vs/editor/common/model/tokensStore.ts
+++ b/src/vs/editor/common/model/tokensStore.ts
@@ -1018,6 +1018,7 @@ export class TokensStore2 {
 				((bMetadata & MetadataConsts.SEMANTIC_USE_ITALIC) ? MetadataConsts.ITALIC_MASK : 0)
 				| ((bMetadata & MetadataConsts.SEMANTIC_USE_BOLD) ? MetadataConsts.BOLD_MASK : 0)
 				| ((bMetadata & MetadataConsts.SEMANTIC_USE_UNDERLINE) ? MetadataConsts.UNDERLINE_MASK : 0)
+				| ((bMetadata & MetadataConsts.SEMANTIC_USE_STRIKETHROUGH) ? MetadataConsts.STRIKETHROUGH_MASK : 0)
 				| ((bMetadata & MetadataConsts.SEMANTIC_USE_FOREGROUND) ? MetadataConsts.FOREGROUND_MASK : 0)
 				| ((bMetadata & MetadataConsts.SEMANTIC_USE_BACKGROUND) ? MetadataConsts.BACKGROUND_MASK : 0)
 			) >>> 0;
diff --git a/src/vs/editor/common/modes.ts b/src/vs/editor/common/modes.ts
index 2217211ce54..0eb734a5eba 100644
--- a/src/vs/editor/common/modes.ts
+++ b/src/vs/editor/common/modes.ts
@@ -92,16 +92,19 @@ export const enum MetadataConsts {
 	FOREGROUND_MASK = 0b00000000011111111100000000000000,
 	BACKGROUND_MASK = 0b11111111100000000000000000000000,
 
-	ITALIC_MASK         = 0b00000000000000000000010000000000,
-	BOLD_MASK           = 0b00000000000000000000100000000000,
-	UNDERLINE_MASK      = 0b00000000000000000001000000000000,
-	STRIKETHROUGH_MASK  = 0b00000000000000000010000000000000,
+	ITALIC_MASK = 0b00000000000000000000010000000000,
+	BOLD_MASK = 0b00000000000000000000100000000000,
+	UNDERLINE_MASK = 0b00000000000000000001000000000000,
+	STRIKETHROUGH_MASK = 0b00000000000000000010000000000000,
 
+	// Semantic tokens cannot set the language id, so we can
+	// use the first 8 bits for control purposes
 	SEMANTIC_USE_ITALIC = 0b00000000000000000000000000000001,
 	SEMANTIC_USE_BOLD = 0b00000000000000000000000000000010,
 	SEMANTIC_USE_UNDERLINE = 0b00000000000000000000000000000100,
-	SEMANTIC_USE_FOREGROUND = 0b00000000000000000000000000001000,
-	SEMANTIC_USE_BACKGROUND = 0b00000000000000000000000000010000,
+	SEMANTIC_USE_STRIKETHROUGH = 0b00000000000000000000000000001000,
+	SEMANTIC_USE_FOREGROUND = 0b00000000000000000000000000010000,
+	SEMANTIC_USE_BACKGROUND = 0b00000000000000000000000000100000,
 
 	LANGUAGEID_OFFSET = 0,
 	TOKEN_TYPE_OFFSET = 8,
@@ -149,6 +152,9 @@ export class TokenMetadata {
 		if (fontStyle & FontStyle.Underline) {
 			className += ' mtku';
 		}
+		if (fontStyle & FontStyle.Strikethrough) {
+			className += ' mtks';
+		}
 
 		return className;
 	}
@@ -164,8 +170,16 @@ export class TokenMetadata {
 		if (fontStyle & FontStyle.Bold) {
 			result += 'font-weight: bold;';
 		}
+		let textDecoration = '';
 		if (fontStyle & FontStyle.Underline) {
-			result += 'text-decoration: underline;';
+			textDecoration += ' underline';
+		}
+		if (fontStyle & FontStyle.Strikethrough) {
+			textDecoration += ' line-through';
+		}
+		if (textDecoration) {
+			result += `text-decoration:${textDecoration};`;
+
 		}
 		return result;
 	}
diff --git a/src/vs/editor/common/modes/supports/tokenization.ts b/src/vs/editor/common/modes/supports/tokenization.ts
index 02de8c49ec3..5c0caa937e0 100644
--- a/src/vs/editor/common/modes/supports/tokenization.ts
+++ b/src/vs/editor/common/modes/supports/tokenization.ts
@@ -69,6 +69,9 @@ export function parseTokenTheme(source: ITokenThemeRule[]): ParsedTokenThemeRule
 					case 'underline':
 						fontStyle = fontStyle | FontStyle.Underline;
 						break;
+					case 'strikethrough':
+						fontStyle = fontStyle | FontStyle.Strikethrough;
+						break;
 				}
 			}
 		}
@@ -414,5 +417,7 @@ export function generateTokensCSSForColorMap(colorMap: readonly Color[]): string
 	rules.push('.mtki { font-style: italic; }');
 	rules.push('.mtkb { font-weight: bold; }');
 	rules.push('.mtku { text-decoration: underline; text-underline-position: under; }');
+	rules.push('.mtks { text-decoration: line-through; }');
+	rules.push('.mtks.mtku { text-decoration: underline line-through; text-underline-position: under; }');
 	return rules.join('\n');
 }
diff --git a/src/vs/editor/common/services/semanticTokensProviderStyling.ts b/src/vs/editor/common/services/semanticTokensProviderStyling.ts
index 186dd85c007..8d7230522de 100644
--- a/src/vs/editor/common/services/semanticTokensProviderStyling.ts
+++ b/src/vs/editor/common/services/semanticTokensProviderStyling.ts
@@ -70,6 +70,10 @@ export class SemanticTokensProviderStyling {
 						const underlineBit = (tokenStyle.underline ? FontStyle.Underline : 0) << MetadataConsts.FONT_STYLE_OFFSET;
 						metadata |= underlineBit | MetadataConsts.SEMANTIC_USE_UNDERLINE;
 					}
+					if (typeof tokenStyle.strikethrough !== 'undefined') {
+						const strikethroughBit = (tokenStyle.strikethrough ? FontStyle.Strikethrough : 0) << MetadataConsts.FONT_STYLE_OFFSET;
+						metadata |= strikethroughBit | MetadataConsts.SEMANTIC_USE_STRIKETHROUGH;
+					}
 					if (tokenStyle.foreground) {
 						const foregroundBits = (tokenStyle.foreground) << MetadataConsts.FOREGROUND_OFFSET;
 						metadata |= foregroundBits | MetadataConsts.SEMANTIC_USE_FOREGROUND;
diff --git a/src/vs/editor/standalone/browser/inspectTokens/inspectTokens.ts b/src/vs/editor/standalone/browser/inspectTokens/inspectTokens.ts
index 044107118ce..8e6213d2f42 100644
--- a/src/vs/editor/standalone/browser/inspectTokens/inspectTokens.ts
+++ b/src/vs/editor/standalone/browser/inspectTokens/inspectTokens.ts
@@ -285,6 +285,9 @@ class InspectTokensWidget extends Disposable implements IContentWidget {
 		if (fontStyle & FontStyle.Underline) {
 			r += 'underline ';
 		}
+		if (fontStyle & FontStyle.Strikethrough) {
+			r += 'strikethrough ';
+		}
 		if (r.length === 0) {
 			r = '---';
 		}
diff --git a/src/vs/editor/standalone/browser/standaloneLanguages.ts b/src/vs/editor/standalone/browser/standaloneLanguages.ts
index e3fb9d72557..d74e7ef43b0 100644
--- a/src/vs/editor/standalone/browser/standaloneLanguages.ts
+++ b/src/vs/editor/standalone/browser/standaloneLanguages.ts
@@ -250,11 +250,11 @@ export interface IEncodedLineTokens {
 	 *     3322 2222 2222 1111 1111 1100 0000 0000
 	 *     1098 7654 3210 9876 5432 1098 7654 3210
 	 * - -------------------------------------------
-	 *     bbbb bbbb bfff ffff ffFF FTTT LLLL LLLL
+	 *     bbbb bbbb bfff ffff ffFF FFTT LLLL LLLL
 	 * - -------------------------------------------
 	 *  - L = EncodedLanguageId (8 bits): Use `getEncodedLanguageId` to get the encoded ID of a language.
-	 *  - T = StandardTokenType (3 bits): Other = 0, Comment = 1, String = 2, RegEx = 4.
-	 *  - F = FontStyle (3 bits): None = 0, Italic = 1, Bold = 2, Underline = 4.
+	 *  - T = StandardTokenType (2 bits): Other = 0, Comment = 1, String = 2, RegEx = 3.
+	 *  - F = FontStyle (4 bits): None = 0, Italic = 1, Bold = 2, Underline = 4, Strikethrough = 8.
 	 *  - f = foreground ColorId (9 bits)
 	 *  - b = background ColorId (9 bits)
 	 *  - The color value for each colorId is defined in IStandaloneThemeData.customTokenColors:
diff --git a/src/vs/editor/standalone/browser/standaloneThemeServiceImpl.ts b/src/vs/editor/standalone/browser/standaloneThemeServiceImpl.ts
index 565d3ee9dcc..fefbc5e44d9 100644
--- a/src/vs/editor/standalone/browser/standaloneThemeServiceImpl.ts
+++ b/src/vs/editor/standalone/browser/standaloneThemeServiceImpl.ts
@@ -164,7 +164,8 @@ class StandaloneTheme implements IStandaloneTheme {
 			foreground: foreground,
 			italic: Boolean(fontStyle & FontStyle.Italic),
 			bold: Boolean(fontStyle & FontStyle.Bold),
-			underline: Boolean(fontStyle & FontStyle.Underline)
+			underline: Boolean(fontStyle & FontStyle.Underline),
+			strikethrough: Boolean(fontStyle & FontStyle.Strikethrough)
 		};
 	}
 
diff --git a/src/vs/editor/test/common/model/tokensStore.test.ts b/src/vs/editor/test/common/model/tokensStore.test.ts
index f17ca9f9eae..88954388130 100644
--- a/src/vs/editor/test/common/model/tokensStore.test.ts
+++ b/src/vs/editor/test/common/model/tokensStore.test.ts
@@ -175,15 +175,15 @@ suite('TokensStore', () => {
 		const model = createTextModel('                    else if ($s = 08) then \'\\b\'');
 		model.setSemanticTokens([
 			new MultilineTokens2(1, new SparseEncodedTokens(new Uint32Array([
-				0, 20, 24, 245768,
-				0, 25, 27, 245768,
-				0, 28, 29, 16392,
-				0, 29, 31, 262152,
-				0, 32, 33, 16392,
-				0, 34, 36, 98312,
-				0, 36, 37, 16392,
-				0, 38, 42, 245768,
-				0, 43, 47, 180232,
+				0, 20, 24, 0b0111100000000010000,
+				0, 25, 27, 0b0111100000000010000,
+				0, 28, 29, 0b0000100000000010000,
+				0, 29, 31, 0b1000000000000010000,
+				0, 32, 33, 0b0000100000000010000,
+				0, 34, 36, 0b0011000000000010000,
+				0, 36, 37, 0b0000100000000010000,
+				0, 38, 42, 0b0111100000000010000,
+				0, 43, 47, 0b0101100000000010000,
 			])))
 		], true);
 		const lineTokens = model.getLineTokens(1);
diff --git a/src/vs/editor/test/common/modes/supports/tokenization.test.ts b/src/vs/editor/test/common/modes/supports/tokenization.test.ts
index 435ba7787a6..2b631a8caf6 100644
--- a/src/vs/editor/test/common/modes/supports/tokenization.test.ts
+++ b/src/vs/editor/test/common/modes/supports/tokenization.test.ts
@@ -39,6 +39,7 @@ suite('Token theme matching', () => {
 			{ token: 'constant.numeric', foreground: '400000' },
 			{ token: 'constant.numeric.hex', fontStyle: 'bold' },
 			{ token: 'constant.numeric.oct', fontStyle: 'bold italic underline' },
+			{ token: 'constant.numeric.bin', fontStyle: 'bold strikethrough' },
 			{ token: 'constant.numeric.dec', fontStyle: '', foreground: '500000' },
 			{ token: 'storage.object.bar', fontStyle: '', foreground: '600000' },
 		], []);
@@ -103,6 +104,10 @@ suite('Token theme matching', () => {
 		assertSimpleMatch('constant.numeric.oct', FontStyle.Bold | FontStyle.Italic | FontStyle.Underline, _E, _B);
 		assertSimpleMatch('constant.numeric.oct.baz', FontStyle.Bold | FontStyle.Italic | FontStyle.Underline, _E, _B);
 
+		// matches constant.numeric.bin
+		assertSimpleMatch('constant.numeric.bin', FontStyle.Bold | FontStyle.Strikethrough, _E, _B);
+		assertSimpleMatch('constant.numeric.bin.baz', FontStyle.Bold | FontStyle.Strikethrough, _E, _B);
+
 		// matches constant.numeric.dec
 		assertSimpleMatch('constant.numeric.dec', FontStyle.None, _F, _B);
 		assertSimpleMatch('constant.numeric.dec.baz', FontStyle.None, _F, _B);
diff --git a/src/vs/editor/test/common/services/semanticTokensProviderStyling.test.ts b/src/vs/editor/test/common/services/semanticTokensProviderStyling.test.ts
index 5d5f1129e44..3ed07ec3458 100644
--- a/src/vs/editor/test/common/services/semanticTokensProviderStyling.test.ts
+++ b/src/vs/editor/test/common/services/semanticTokensProviderStyling.test.ts
@@ -38,7 +38,11 @@ suite('ModelService', () => {
 				return {
 					getTokenStyleMetadata: (tokenType, tokenModifiers, languageId): ITokenStyle => {
 						return {
-							foreground: parseInt(tokenType.substr(2), 10)
+							foreground: parseInt(tokenType.substr(2), 10),
+							bold: undefined,
+							underline: undefined,
+							strikethrough: undefined,
+							italic: undefined
 						};
 					}
 				};
diff --git a/src/vs/monaco.d.ts b/src/vs/monaco.d.ts
index 2827c0577ec..74debc29154 100644
--- a/src/vs/monaco.d.ts
+++ b/src/vs/monaco.d.ts
@@ -5294,11 +5294,11 @@ declare namespace monaco.languages {
 		 *     3322 2222 2222 1111 1111 1100 0000 0000
 		 *     1098 7654 3210 9876 5432 1098 7654 3210
 		 * - -------------------------------------------
-		 *     bbbb bbbb bfff ffff ffFF FTTT LLLL LLLL
+		 *     bbbb bbbb bfff ffff ffFF FFTT LLLL LLLL
 		 * - -------------------------------------------
 		 *  - L = EncodedLanguageId (8 bits): Use `getEncodedLanguageId` to get the encoded ID of a language.
-		 *  - T = StandardTokenType (3 bits): Other = 0, Comment = 1, String = 2, RegEx = 4.
-		 *  - F = FontStyle (3 bits): None = 0, Italic = 1, Bold = 2, Underline = 4.
+		 *  - T = StandardTokenType (2 bits): Other = 0, Comment = 1, String = 2, RegEx = 3.
+		 *  - F = FontStyle (4 bits): None = 0, Italic = 1, Bold = 2, Underline = 4, Strikethrough = 8.
 		 *  - f = foreground ColorId (9 bits)
 		 *  - b = background ColorId (9 bits)
 		 *  - The color value for each colorId is defined in IStandaloneThemeData.customTokenColors:
diff --git a/src/vs/platform/theme/common/themeService.ts b/src/vs/platform/theme/common/themeService.ts
index b2f9b5691b7..691ff19c4ec 100644
--- a/src/vs/platform/theme/common/themeService.ts
+++ b/src/vs/platform/theme/common/themeService.ts
@@ -101,10 +101,11 @@ export function getThemeTypeSelector(type: ColorScheme): string {
 }
 
 export interface ITokenStyle {
-	readonly foreground?: number;
-	readonly bold?: boolean;
-	readonly underline?: boolean;
-	readonly italic?: boolean;
+	readonly foreground: number | undefined;
+	readonly bold: boolean | undefined;
+	readonly underline: boolean | undefined;
+	readonly strikethrough: boolean | undefined;
+	readonly italic: boolean | undefined;
 }
 
 export interface IColorTheme {
diff --git a/src/vs/platform/theme/common/tokenClassificationRegistry.ts b/src/vs/platform/theme/common/tokenClassificationRegistry.ts
index 87a87855d92..b171d0186a4 100644
--- a/src/vs/platform/theme/common/tokenClassificationRegistry.ts
+++ b/src/vs/platform/theme/common/tokenClassificationRegistry.ts
@@ -24,7 +24,7 @@ export const typeAndModifierIdPattern = `^${idPattern}$`;
 
 export const selectorPattern = `^(${idPattern}|\\*)(\\${CLASSIFIER_MODIFIER_SEPARATOR}${idPattern})*(${TOKEN_CLASSIFIER_LANGUAGE_SEPARATOR}${idPattern})?$`;
 
-export const fontStylePattern = '^(\\s*(italic|bold|underline))*\\s*$';
+export const fontStylePattern = '^(\\s*(italic|bold|underline|strikethrough))*\\s*$';
 
 export interface TokenSelector {
 	match(type: string, modifiers: string[], language: string): number;
@@ -41,18 +41,20 @@ export interface TokenTypeOrModifierContribution {
 
 
 export interface TokenStyleData {
-	foreground?: Color;
-	bold?: boolean;
-	underline?: boolean;
-	italic?: boolean;
+	foreground: Color | undefined;
+	bold: boolean | undefined;
+	underline: boolean | undefined;
+	strikethrough: boolean | undefined;
+	italic: boolean | undefined;
 }
 
 export class TokenStyle implements Readonly<TokenStyleData> {
 	constructor(
-		public readonly foreground?: Color,
-		public readonly bold?: boolean,
-		public readonly underline?: boolean,
-		public readonly italic?: boolean,
+		public readonly foreground: Color | undefined,
+		public readonly bold: boolean | undefined,
+		public readonly underline: boolean | undefined,
+		public readonly strikethrough: boolean | undefined,
+		public readonly italic: boolean | undefined,
 	) {
 	}
 }
@@ -64,13 +66,20 @@ export namespace TokenStyle {
 			_bold: style.bold === undefined ? null : style.bold,
 			_underline: style.underline === undefined ? null : style.underline,
 			_italic: style.italic === undefined ? null : style.italic,
+			_strikethrough: style.strikethrough === undefined ? null : style.strikethrough,
 		};
 	}
 	export function fromJSONObject(obj: any): TokenStyle | undefined {
 		if (obj) {
 			const boolOrUndef = (b: any) => (typeof b === 'boolean') ? b : undefined;
 			const colorOrUndef = (s: any) => (typeof s === 'string') ? Color.fromHex(s) : undefined;
-			return new TokenStyle(colorOrUndef(obj._foreground), boolOrUndef(obj._bold), boolOrUndef(obj._underline), boolOrUndef(obj._italic));
+			return new TokenStyle(
+				colorOrUndef(obj._foreground),
+				boolOrUndef(obj._bold),
+				boolOrUndef(obj._underline),
+				boolOrUndef(obj._strikethrough),
+				boolOrUndef(obj._italic)
+			);
 		}
 		return undefined;
 	}
@@ -82,32 +91,36 @@ export namespace TokenStyle {
 			&& (s1.foreground instanceof Color ? s1.foreground.equals(s2.foreground) : s2.foreground === undefined)
 			&& s1.bold === s2.bold
 			&& s1.underline === s2.underline
+			&& s1.strikethrough === s2.strikethrough
 			&& s1.italic === s2.italic;
 	}
 	export function is(s: any): s is TokenStyle {
 		return s instanceof TokenStyle;
 	}
-	export function fromData(data: { foreground?: Color, bold?: boolean, underline?: boolean, italic?: boolean }): TokenStyle {
-		return new TokenStyle(data.foreground, data.bold, data.underline, data.italic);
+	export function fromData(data: { foreground: Color | undefined, bold: boolean | undefined, underline: boolean | undefined, strikethrough: boolean | undefined, italic: boolean | undefined }): TokenStyle {
+		return new TokenStyle(data.foreground, data.bold, data.underline, data.strikethrough, data.italic);
 	}
-	export function fromSettings(foreground: string | undefined, fontStyle: string | undefined, bold?: boolean, underline?: boolean, italic?: boolean): TokenStyle {
+	export function fromSettings(foreground: string | undefined, fontStyle: string | undefined): TokenStyle;
+	export function fromSettings(foreground: string | undefined, fontStyle: string | undefined, bold: boolean | undefined, underline: boolean | undefined, strikethrough: boolean | undefined, italic: boolean | undefined): TokenStyle;
+	export function fromSettings(foreground: string | undefined, fontStyle: string | undefined, bold?: boolean, underline?: boolean, strikethrough?: boolean, italic?: boolean): TokenStyle {
 		let foregroundColor = undefined;
 		if (foreground !== undefined) {
 			foregroundColor = Color.fromHex(foreground);
 		}
 		if (fontStyle !== undefined) {
-			bold = italic = underline = false;
-			const expression = /italic|bold|underline/g;
+			bold = italic = underline = strikethrough = false;
+			const expression = /italic|bold|underline|strikethrough/g;
 			let match;
 			while ((match = expression.exec(fontStyle))) {
 				switch (match[0]) {
 					case 'bold': bold = true; break;
 					case 'italic': italic = true; break;
 					case 'underline': underline = true; break;
+					case 'strikethrough': strikethrough = true; break;
 				}
 			}
 		}
-		return new TokenStyle(foregroundColor, bold, underline, italic);
+		return new TokenStyle(foregroundColor, bold, underline, strikethrough, italic);
 	}
 }
 
@@ -287,10 +300,27 @@ class TokenClassificationRegistry implements ITokenClassificationRegistry {
 					},
 					fontStyle: {
 						type: 'string',
-						description: nls.localize('schema.token.fontStyle', 'Sets the all font styles of the rule: \'italic\', \'bold\' or \'underline\' or a combination. All styles that are not listed are unset. The empty string unsets all styles.'),
+						description: nls.localize('schema.token.fontStyle', 'Sets the all font styles of the rule: \'italic\', \'bold\', \'underline\' or \'strikethrough\' or a combination. All styles that are not listed are unset. The empty string unsets all styles.'),
 						pattern: fontStylePattern,
-						patternErrorMessage: nls.localize('schema.fontStyle.error', 'Font style must be \'italic\', \'bold\' or \'underline\' or a combination. The empty string unsets all styles.'),
-						defaultSnippets: [{ label: nls.localize('schema.token.fontStyle.none', 'None (clear inherited style)'), bodyText: '""' }, { body: 'italic' }, { body: 'bold' }, { body: 'underline' }, { body: 'italic underline' }, { body: 'bold underline' }, { body: 'italic bold underline' }]
+						patternErrorMessage: nls.localize('schema.fontStyle.error', 'Font style must be \'italic\', \'bold\', \'underline\' or \'strikethrough\' or a combination. The empty string unsets all styles.'),
+						defaultSnippets: [
+							{ label: nls.localize('schema.token.fontStyle.none', 'None (clear inherited style)'), bodyText: '""' },
+							{ body: 'italic' },
+							{ body: 'bold' },
+							{ body: 'underline' },
+							{ body: 'strikethrough' },
+							{ body: 'italic bold' },
+							{ body: 'italic underline' },
+							{ body: 'italic strikethrough' },
+							{ body: 'bold underline' },
+							{ body: 'bold strikethrough' },
+							{ body: 'underline strikethrough' },
+							{ body: 'italic bold underline' },
+							{ body: 'italic bold strikethrough' },
+							{ body: 'italic underline strikethrough' },
+							{ body: 'bold underline strikethrough' },
+							{ body: 'italic bold underline strikethrough' }
+						]
 					},
 					bold: {
 						type: 'boolean',
@@ -303,6 +333,10 @@ class TokenClassificationRegistry implements ITokenClassificationRegistry {
 					underline: {
 						type: 'boolean',
 						description: nls.localize('schema.token.underline', 'Sets or unsets the font style to underline. Note, the presence of \'fontStyle\' overrides this setting.'),
+					},
+					strikethrough: {
+						type: 'boolean',
+						description: nls.localize('schema.token.strikethrough', 'Sets or unsets the font style to strikethrough. Note, the presence of \'fontStyle\' overrides this setting.'),
 					}
 
 				},
diff --git a/src/vs/workbench/contrib/codeEditor/browser/inspectEditorTokens/inspectEditorTokens.ts b/src/vs/workbench/contrib/codeEditor/browser/inspectEditorTokens/inspectEditorTokens.ts
index 485e02c1ecd..7fa8aee4460 100644
--- a/src/vs/workbench/contrib/codeEditor/browser/inspectEditorTokens/inspectEditorTokens.ts
+++ b/src/vs/workbench/contrib/codeEditor/browser/inspectEditorTokens/inspectEditorTokens.ts
@@ -143,11 +143,12 @@ interface ISemanticTokenInfo {
 interface IDecodedMetadata {
 	languageId: string;
 	tokenType: StandardTokenType;
-	bold?: boolean;
-	italic?: boolean;
-	underline?: boolean;
-	foreground?: string;
-	background?: string;
+	bold: boolean | undefined;
+	italic: boolean | undefined;
+	underline: boolean | undefined;
+	strikethrough: boolean | undefined;
+	foreground: string | undefined;
+	background: string | undefined;
 }
 
 function renderTokenText(tokenText: string): string {
@@ -314,7 +315,7 @@ class InspectEditorTokensWidget extends Disposable implements IContentWidget {
 				));
 			}
 			if (semanticTokenInfo.metadata) {
-				const properties: (keyof TokenStyleData)[] = ['foreground', 'bold', 'italic', 'underline'];
+				const properties: (keyof TokenStyleData)[] = ['foreground', 'bold', 'italic', 'underline', 'strikethrough'];
 				const propertiesByDefValue: { [rule: string]: string[] } = {};
 				const allDefValues = new Array<[Array<HTMLElement | string>, string]>(); // remember the order
 				// first collect to detect when the same rule is used for multiple properties
@@ -421,7 +422,7 @@ class InspectEditorTokensWidget extends Disposable implements IContentWidget {
 
 		const fontStyleLabels = new Array<HTMLElement | string>();
 
-		function addStyle(key: 'bold' | 'italic' | 'underline') {
+		function addStyle(key: 'bold' | 'italic' | 'underline' | 'strikethrough') {
 			let label: HTMLElement | string | undefined;
 			if (semantic && semantic[key]) {
 				label = $('span.tiw-metadata-semantic', undefined, key);
@@ -438,6 +439,7 @@ class InspectEditorTokensWidget extends Disposable implements IContentWidget {
 		addStyle('bold');
 		addStyle('italic');
 		addStyle('underline');
+		addStyle('strikethrough');
 		if (fontStyleLabels.length) {
 			elements.push($('tr', undefined,
 				$('td.tiw-metadata-key', undefined, 'font style' as string),
@@ -460,6 +462,7 @@ class InspectEditorTokensWidget extends Disposable implements IContentWidget {
 			bold: (fontStyle & FontStyle.Bold) ? true : undefined,
 			italic: (fontStyle & FontStyle.Italic) ? true : undefined,
 			underline: (fontStyle & FontStyle.Underline) ? true : undefined,
+			strikethrough: (fontStyle & FontStyle.Strikethrough) ? true : undefined,
 			foreground: colorMap[foreground],
 			background: colorMap[background]
 		};
@@ -583,7 +586,9 @@ class InspectEditorTokensWidget extends Disposable implements IContentWidget {
 						bold: tokenStyle?.bold,
 						italic: tokenStyle?.italic,
 						underline: tokenStyle?.underline,
-						foreground: colorMap[tokenStyle?.foreground || ColorId.None]
+						strikethrough: tokenStyle?.strikethrough,
+						foreground: colorMap[tokenStyle?.foreground || ColorId.None],
+						background: undefined
 					};
 				}
 
diff --git a/src/vs/workbench/services/textMate/common/TMHelper.ts b/src/vs/workbench/services/textMate/common/TMHelper.ts
index f959abeb57e..32d73fa14b7 100644
--- a/src/vs/workbench/services/textMate/common/TMHelper.ts
+++ b/src/vs/workbench/services/textMate/common/TMHelper.ts
@@ -16,7 +16,7 @@ export interface ITokenColorizationRule {
 export interface ITokenColorizationSetting {
 	foreground?: string;
 	background?: string;
-	fontStyle?: string;  // italic, underline, bold
+	fontStyle?: string;  // italic, underline, strikethrough, bold
 }
 
 export function findMatchingThemeRule(theme: IColorTheme, scopes: string[], onlyColorRules: boolean = true): ThemeRule | null {
diff --git a/src/vs/workbench/services/themes/common/colorThemeData.ts b/src/vs/workbench/services/themes/common/colorThemeData.ts
index 13eb1d31e1c..f99657d109e 100644
--- a/src/vs/workbench/services/themes/common/colorThemeData.ts
+++ b/src/vs/workbench/services/themes/common/colorThemeData.ts
@@ -148,12 +148,14 @@ export class ColorThemeData implements IWorkbenchColorTheme {
 			foreground: undefined,
 			bold: undefined,
 			underline: undefined,
+			strikethrough: undefined,
 			italic: undefined
 		};
 		let score = {
 			foreground: -1,
 			bold: -1,
 			underline: -1,
+			strikethrough: -1,
 			italic: -1
 		};
 
@@ -163,7 +165,7 @@ export class ColorThemeData implements IWorkbenchColorTheme {
 				result.foreground = style.foreground;
 				definitions.foreground = definition;
 			}
-			for (let p of ['bold', 'underline', 'italic']) {
+			for (let p of ['bold', 'underline', 'strikethrough', 'italic']) {
 				const property = p as keyof TokenStyle;
 				const info = style[property];
 				if (info !== undefined) {
@@ -272,7 +274,8 @@ export class ColorThemeData implements IWorkbenchColorTheme {
 			foreground: this.getTokenColorIndex().get(style.foreground),
 			bold: style.bold,
 			underline: style.underline,
-			italic: style.italic
+			strikethrough: style.strikethrough,
+			italic: style.italic,
 		};
 	}
 
@@ -332,7 +335,7 @@ export class ColorThemeData implements IWorkbenchColorTheme {
 			if (foreground !== undefined || fontStyle !== undefined) {
 				if (definitions) {
 					definitions.foreground = foregroundThemingRule;
-					definitions.bold = definitions.italic = definitions.underline = fontStyleThemingRule;
+					definitions.bold = definitions.italic = definitions.underline = definitions.strikethrough = fontStyleThemingRule;
 					definitions.scope = scope;
 				}
 
@@ -858,7 +861,7 @@ function readSemanticTokenRule(selectorString: string, settings: ISemanticTokenC
 	if (typeof settings === 'string') {
 		style = TokenStyle.fromSettings(settings, undefined);
 	} else if (isSemanticTokenColorizationSetting(settings)) {
-		style = TokenStyle.fromSettings(settings.foreground, settings.fontStyle, settings.bold, settings.underline, settings.italic);
+		style = TokenStyle.fromSettings(settings.foreground, settings.fontStyle, settings.bold, settings.underline, settings.strikethrough, settings.italic);
 	}
 	if (style) {
 		return { selector, style };
@@ -868,7 +871,7 @@ function readSemanticTokenRule(selectorString: string, settings: ISemanticTokenC
 
 function isSemanticTokenColorizationSetting(style: any): style is ISemanticTokenColorizationSetting {
 	return style && (types.isString(style.foreground) || types.isString(style.fontStyle) || types.isBoolean(style.italic)
-		|| types.isBoolean(style.underline) || types.isBoolean(style.bold));
+		|| types.isBoolean(style.underline) || types.isBoolean(style.strikethrough) || types.isBoolean(style.bold));
 }
 
 
diff --git a/src/vs/workbench/services/themes/common/colorThemeSchema.ts b/src/vs/workbench/services/themes/common/colorThemeSchema.ts
index 0b797a38eb6..ca201c73c95 100644
--- a/src/vs/workbench/services/themes/common/colorThemeSchema.ts
+++ b/src/vs/workbench/services/themes/common/colorThemeSchema.ts
@@ -149,10 +149,27 @@ const textmateColorSchema: IJSONSchema = {
 				},
 				fontStyle: {
 					type: 'string',
-					description: nls.localize('schema.token.fontStyle', 'Font style of the rule: \'italic\', \'bold\' or \'underline\' or a combination. The empty string unsets inherited settings.'),
-					pattern: '^(\\s*\\b(italic|bold|underline))*\\s*$',
-					patternErrorMessage: nls.localize('schema.fontStyle.error', 'Font style must be \'italic\', \'bold\' or \'underline\' or a combination or the empty string.'),
-					defaultSnippets: [{ label: nls.localize('schema.token.fontStyle.none', 'None (clear inherited style)'), bodyText: '""' }, { body: 'italic' }, { body: 'bold' }, { body: 'underline' }, { body: 'italic bold' }, { body: 'italic underline' }, { body: 'bold underline' }, { body: 'italic bold underline' }]
+					description: nls.localize('schema.token.fontStyle', 'Font style of the rule: \'italic\', \'bold\', \'underline\', \'strikethrough\' or a combination. The empty string unsets inherited settings.'),
+					pattern: '^(\\s*\\b(italic|bold|underline|strikethrough))*\\s*$',
+					patternErrorMessage: nls.localize('schema.fontStyle.error', 'Font style must be \'italic\', \'bold\', \'underline\', \'strikethrough\' or a combination or the empty string.'),
+					defaultSnippets: [
+						{ label: nls.localize('schema.token.fontStyle.none', 'None (clear inherited style)'), bodyText: '""' },
+						{ body: 'italic' },
+						{ body: 'bold' },
+						{ body: 'underline' },
+						{ body: 'strikethrough' },
+						{ body: 'italic bold' },
+						{ body: 'italic underline' },
+						{ body: 'italic strikethrough' },
+						{ body: 'bold underline' },
+						{ body: 'bold strikethrough' },
+						{ body: 'underline strikethrough' },
+						{ body: 'italic bold underline' },
+						{ body: 'italic bold strikethrough' },
+						{ body: 'italic underline strikethrough' },
+						{ body: 'bold underline strikethrough' },
+						{ body: 'italic bold underline strikethrough' }
+					]
 				}
 			},
 			additionalProperties: false,
@@ -243,4 +260,3 @@ export function registerColorThemeSchemas() {
 	schemaRegistry.registerSchema(colorThemeSchemaId, colorThemeSchema);
 	schemaRegistry.registerSchema(textmateColorsSchemaId, textmateColorSchema);
 }
-
diff --git a/src/vs/workbench/services/themes/common/workbenchThemeService.ts b/src/vs/workbench/services/themes/common/workbenchThemeService.ts
index 6c3e472e41e..69cc4d515cc 100644
--- a/src/vs/workbench/services/themes/common/workbenchThemeService.ts
+++ b/src/vs/workbench/services/themes/common/workbenchThemeService.ts
@@ -169,14 +169,15 @@ export interface ITextMateThemingRule {
 export interface ITokenColorizationSetting {
 	foreground?: string;
 	background?: string;
-	fontStyle?: string; /* [italic|underline|bold] */
+	fontStyle?: string; /* [italic|bold|underline|strikethrough] */
 }
 
 export interface ISemanticTokenColorizationSetting {
 	foreground?: string;
-	fontStyle?: string; /* [italic|underline|bold] */
+	fontStyle?: string; /* [italic|bold|underline|strikethrough] */
 	bold?: boolean;
 	underline?: boolean;
+	strikethrough?: boolean;
 	italic?: boolean;
 }
 
diff --git a/src/vs/workbench/services/themes/test/electron-browser/tokenStyleResolving.test.ts b/src/vs/workbench/services/themes/test/electron-browser/tokenStyleResolving.test.ts
index 8a3acdfc4d2..95d73c79422 100644
--- a/src/vs/workbench/services/themes/test/electron-browser/tokenStyleResolving.test.ts
+++ b/src/vs/workbench/services/themes/test/electron-browser/tokenStyleResolving.test.ts
@@ -24,9 +24,9 @@ import { IConfigurationService } from 'vs/platform/configuration/common/configur
 const undefinedStyle = { bold: undefined, underline: undefined, italic: undefined };
 const unsetStyle = { bold: false, underline: false, italic: false };
 
-function ts(foreground: string | undefined, styleFlags: { bold?: boolean; underline?: boolean; italic?: boolean; } | undefined): TokenStyle {
+function ts(foreground: string | undefined, styleFlags: { bold?: boolean; underline?: boolean; strikethrough?: boolean; italic?: boolean; } | undefined): TokenStyle {
 	const foregroundColor = isString(foreground) ? Color.fromHex(foreground) : undefined;
-	return new TokenStyle(foregroundColor, styleFlags && styleFlags.bold, styleFlags && styleFlags.underline, styleFlags && styleFlags.italic);
+	return new TokenStyle(foregroundColor, styleFlags?.bold, styleFlags?.underline, styleFlags?.strikethrough, styleFlags?.italic);
 }
 
 function tokenStyleAsString(ts: TokenStyle | undefined | null) {