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| // Use Gists to store code you would like to remember later on | |
| console.log(window); // log the "window" object to the console |
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| Tokenizer.prototype.stripComments = function(text) { | |
| return text.replace(/\/\/[^\n]+/g, ""); | |
| } |
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| Tokenizer.prototype.trimWhitespace = function(text) { | |
| cleanedText = text.replace(/\n+/g, "\n"); | |
| cleanedText = cleanedText.replace(/[ ]+/g, " "); | |
| cleanedText = cleanedText.trim(); | |
| return cleanedText; | |
| } |
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| Tokenizer.prototype.resetNewlines = function(text) { | |
| nlText = text.replace(/\n/g, "").replace(/\;/g, ";\n"); | |
| nlText = nlText.replace(/\}/g, "}\n").replace(/\{/g, "\n{\n"); | |
| nlText = nlText.replace(/\n[ ]+/g, "\n"); | |
| nlText = nlText.replace(/\n$/, ""); | |
| return nlText; | |
| } |
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| Tokenizer.prototype.padTokens = function(text) { | |
| tokenized = text.replace(/ ?([,\(\)\/\[\]\+\*\-]+) ?/g, " $1 "); | |
| tokenized = tokenized.replace(/ ?([,]) ?/g, " $1 "); | |
| tokenized = tokenized.replace(/- >/g, "->") | |
| tokenized = tokenized.replace(/ ?(==) ?/g, " $1 "); | |
| tokenized = tokenized.replace(/;/g, " ;"); | |
| tokenized = tokenized.replace(/\s{2,}/g, " "); | |
| return tokenized; | |
| } |
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| Tokenizer.prototype.getTokenLines = function(text) { | |
| lines = text.split("\n"); | |
| tokenLines = []; | |
| for (var lineId = 0; lineId < lines.length; lineId++) { | |
| line = lines[lineId]; | |
| tokens = line.split(" "); | |
| tokenLines.push(tokens); | |
| } | |
| return tokenLines; | |
| } |
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| Tokenizer.prototype.run = function(text) { | |
| formattedText = this.prepareCodeForTokenization(text); | |
| tokens = this.getTokenLines(formattedText); | |
| return tokens; | |
| } | |
| Tokenizer.prototype.prepareCodeForTokenization = function(text) { | |
| text = this.stripComments(text); | |
| text = this.trimWhitespace(text); | |
| text = this.resetNewlines(text); |
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| function LexicalAnalyzer() { | |
| this.tokenTypes = { | |
| "include": /^include$/, | |
| "string": /^\"[^\"]+\"$/, | |
| "unaryop": /^(sin|cos|tan|exp|ln|sqrt)$/, | |
| "exp": /^(\+|\-|\*|\/|\^)$/, | |
| "comma": /^\,$/, | |
| "openparen": /^\($/, | |
| "closeparen": /^\)$/, | |
| "openbracket": /^\[$/, |
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| LexicalAnalyzer.prototype.getClassifiedTokenFromLines = function(tokenLines) { | |
| classifiedTokens = []; | |
| errors = []; | |
| // loop through each line of code | |
| for (var lineId = 0; lineId < tokenLines.length; lineId++) { | |
| line = tokenLines[lineId]; | |
| // loop through each token in each line | |
| for (var tokenId = 0; tokenId < line.length; tokenId++) { | |
| token = line[tokenId]; | |
| classifiedToken = null; |
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| LexicalAnalyzer.prototype.run = function(tokenLines) { | |
| lexOutput = this.getClassifiedTokenFromLines(tokenLines); | |
| return lexOutput; | |
| }; |
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