feature: inject global context

mistlog · Oct 23, 2021 · 6d50b4f · 6d50b4f
1 parent 15776ac
commit 6d50b4f
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Showing 5 changed files with 29 additions and 9 deletions.
diff --git a/src/renderer/renderer.test.tsx b/src/renderer/renderer.test.tsx
@@ -70,4 +70,23 @@ test("renderer: tracer", () => {
     const parser = ReactPeg.render(<TracerTest />, { tracer });
     const ast = parser.parse("123");
     expect(ast).toEqual("123");
+})
+
+test("renderer.context", () => {
+
+    function ContextTest() {
+        return (
+            <pattern action={({ digit, globalContext }) => {
+                return globalContext.transform(digit);
+            }}>
+                <Digit label="digit" />
+            </pattern>
+        );
+    }
+
+    const parser = ReactPeg.render(<ContextTest />);
+    const ast = parser.parse("1", {
+        transform: (digit: string) => `digit value is ${digit}`
+    });
+    expect(ast).toEqual("digit value is 1");
 })
diff --git a/src/renderer/renderer.ts b/src/renderer/renderer.ts
@@ -23,11 +23,12 @@ class Renderer {
     constructor(chunk: Chunk) {
         this.initializer = `
             {
-                const { actions } = options;
+                const { actions, context } = options;
                 const globalFunction = {
                     location,
                     text
                 };
+                const globalContext = context || {};
             }
         `;
 
@@ -80,9 +81,9 @@ class Parser {
         this.parser = peg.generate(this.grammar, { trace: Boolean(renderer.tracer) });
     }
 
-    parse(code: string) {
+    parse(code: string, context = {}) {
         try {
-            const options: peg.ParserOptions = { actions: this.renderer.actions };
+            const options: peg.ParserOptions = { actions: this.renderer.actions, context };
             if (this.renderer.tracer) {
                 /**
                  * Tracing with peg.js: https://gist.github.com/mistlog/3ac6fdf7de3e7af2da15b339b4bb5187

diff --git a/src/translator/built-in/__snapshots__/built-in.test.tsx.snap b/src/translator/built-in/__snapshots__/built-in.test.tsx.snap
@@ -2,8 +2,8 @@
 
 exports[`translator.pattern 1`] = `
 "((a: 'a' { 
-        return actions.get(\\"action0\\")({a, globalFunction});
+        return actions.get(\\"action0\\")({a, globalFunction,globalContext});
     }) / (b: 'b' { 
-        return actions.get(\\"action1\\")({b, globalFunction});
+        return actions.get(\\"action1\\")({b, globalFunction,globalContext});
     }))"
 `;
diff --git a/src/translator/built-in/pattern.ts b/src/translator/built-in/pattern.ts
@@ -11,14 +11,14 @@ export class PatternTranslator extends Translator {
     }
 }
 
-function translateAction(action: Function, labels: Array<string>, actions: Map<string,Function>) {
+function translateAction(action: Function, labels: Array<string>, actions: Map<string, Function>) {
     const labels_param = labels.length === 0 ? "" : `${labels.join(", ")}, `;
 
     const key = `action${actions.size}`;
     actions.set(key, action);
 
     const actionStr = `{ 
-        return actions.get("${key}")({${labels_param}globalFunction});
+        return actions.get("${key}")({${labels_param}${["globalFunction", "globalContext"].join(",")}});
     }`;
     return actionStr;
 }

diff --git a/src/translator/rule/__snapshots__/rule.test.tsx.snap b/src/translator/rule/__snapshots__/rule.test.tsx.snap
@@ -8,12 +8,12 @@ exports[`translator.rule.pattern 1`] = `"Test \\"Test\\" = Foo"`;
 
 exports[`translator.rule.props 1`] = `
 "Char \\"Char\\" = ([A-Z] { 
-        return actions.get(\\"action0\\")({globalFunction});
+        return actions.get(\\"action0\\")({globalFunction,globalContext});
     })"
 `;
 
 exports[`translator.rule.props 2`] = `
 "Char \\"Char\\" = ([a-z] { 
-        return actions.get(\\"action0\\")({globalFunction});
+        return actions.get(\\"action0\\")({globalFunction,globalContext});
     })"
 `;