Better error handling and other fixes

• Fix indentation
• Exit from 'run' script if compilation fails
• Rename methods from 'canBe' to 'is'
• Rename method 'codegen' to 'translate'
• Rework error management
• Rename terminal symbol 'LITNUM' to 'LITREAL'
• Change type of semantic value of 'LITREAL'
• Allow scientific notation in 'real' literals
• Update documentation

Better explanation of activity 2

• Show type in GUI
• More details on activity 2

Adding semantic analysis

• Add script "run" to make it easier to test the compiler
• Add negate unary operator to EPLan
• Update documentation
• Ignore .iml files
• Rename the generated parser class
• Add location to AST
• Add unit name to lexer
• Add simple GUI
• Add more command line options
• Add type package and type representation for 'real'
• Add type mismatch error message
• Only generate code in the absense of errors
• Add semantic analysis
• Rename class 'ExpNum' to 'ExpReal'
• More flexible generation code to print the result

Small fixes

• Do not dump the LLVM module
• Update documentation
• Update documentation
• Fix syntax error in the grammar
• Don't print the syntax tree with toString

Code generation

• Add code generator using LLVM
• Add more documentation

Convert ASTs to trees of string for better output

• Add converstions toTree in ASTs
• Add local copy of unreleased library javaslang-render.
  • javaslang-render is a rendering library from the javaslang project. It can help with drawing ASTs.
  • Currently there is no release of javaslang-render, therefore a binary jar was built and added to src/main/resources.

toString for ASTs

• Add dependency on commons-lang3
• Overload toString method in AST class using commons-lang3 library

Syntax trees

• Add abstract syntax tree classes
• Let the parser construct abstract syntax trees

Semantic actions for calculation

• Add semantic actions to the grammar
  • The terminal symbol for literal number and the non terminal symbols receives a semantic value of type Double, corresponding to their value when evaluated.
  • The semantic actions evaluate the operations indicated in each production rule, calculating the semantic value of the symbol in its left hand side.
  • At the end the start symbol semantic value is the value of the whole expression.

Customize syntax errors reporting

• Override error routines in parser