diff options
Diffstat (limited to 'src/main/java/bjc/rgens/parser/elements/vars')
6 files changed, 219 insertions, 0 deletions
diff --git a/src/main/java/bjc/rgens/parser/elements/vars/ARefVariableElement.java b/src/main/java/bjc/rgens/parser/elements/vars/ARefVariableElement.java new file mode 100644 index 0000000..a4bb730 --- /dev/null +++ b/src/main/java/bjc/rgens/parser/elements/vars/ARefVariableElement.java @@ -0,0 +1,31 @@ +package bjc.rgens.parser.elements.vars; + +import bjc.rgens.parser.GenerationState; +import bjc.rgens.parser.GrammarException; +import bjc.rgens.parser.Rule; + +public class ARefVariableElement extends VariableElement { + public String value; + + public ARefVariableElement(String val) { + super(false); + + value = val; + } + + public void generate(GenerationState state) { + if(!state.rlVars.containsKey(value)) { + throw new GrammarException("No rule variable named " + value); + } + + Rule rl = state.rlVars.get(value); + + GenerationState newState = state.newBuf(); + + rl.generate(newState); + + String res = newState.contents.toString(); + + state.contents.append(res); + } +} diff --git a/src/main/java/bjc/rgens/parser/elements/vars/LiteralVariableElement.java b/src/main/java/bjc/rgens/parser/elements/vars/LiteralVariableElement.java new file mode 100644 index 0000000..cf33c66 --- /dev/null +++ b/src/main/java/bjc/rgens/parser/elements/vars/LiteralVariableElement.java @@ -0,0 +1,17 @@ +package bjc.rgens.parser.elements.vars; + +import bjc.rgens.parser.GenerationState; + +public class LiteralVariableElement extends VariableElement { + public String val; + + public LiteralVariableElement(boolean forbidSpaces, String val) { + super(forbidSpaces); + + this.val = val; + } + + public void generate(GenerationState state) { + state.contents.append(val); + } +} diff --git a/src/main/java/bjc/rgens/parser/elements/vars/RRefVariableElement.java b/src/main/java/bjc/rgens/parser/elements/vars/RRefVariableElement.java new file mode 100644 index 0000000..d731d64 --- /dev/null +++ b/src/main/java/bjc/rgens/parser/elements/vars/RRefVariableElement.java @@ -0,0 +1,31 @@ +package bjc.rgens.parser.elements.vars; + +import bjc.rgens.parser.GenerationState; +import bjc.rgens.parser.GrammarException; +import bjc.rgens.parser.Rule; + +public class RRefVariableElement extends VariableElement { + public String value; + + public RRefVariableElement(boolean forbidSpaces, String val) { + super(forbidSpaces); + + value = val; + } + + public void generate(GenerationState state) { + Rule rl = state.findRule(value, true); + + GenerationState newState = state.newBuf(); + + rl.generate(newState); + + String res = newState.contents.toString(); + + if(forbidSpaces && res.contains(" ")) { + throw new GrammarException("Spaces not allowed in this context (rule-reference %s)"); + } + + state.contents.append(res); + } +} diff --git a/src/main/java/bjc/rgens/parser/elements/vars/TRefVariableElement.java b/src/main/java/bjc/rgens/parser/elements/vars/TRefVariableElement.java new file mode 100644 index 0000000..a33d78c --- /dev/null +++ b/src/main/java/bjc/rgens/parser/elements/vars/TRefVariableElement.java @@ -0,0 +1,42 @@ +package bjc.rgens.parser.elements.vars; + +import bjc.rgens.parser.GenerationState; +import bjc.rgens.parser.GrammarException; +import bjc.rgens.parser.templates.GrammarTemplate; + +/* + * @TODO + * + * finish when template vars are implemented. + */ +public class TRefVariableElement extends VariableElement { + public String value; + + public TRefVariableElement(boolean forbidSpaces, String val) { + super(forbidSpaces); + + value = val; + } + + public void generate(GenerationState state) { + /* + if(!state.rlVars.containsKey(val)) { + throw new GrammarException("No rule variable named " + val); + } + + Rule rl = state.rlVars.get(val); + + GenerationState newState = state.newBuf(); + + rl.generate(newState); + + String res = newState.contents.toString(); + + if(forbidSpaces && res.contains(" ")) { + throw new GrammarException("Spaces not allowed in this context (rule-var %s)"); + } + + return res; + */ + } +} diff --git a/src/main/java/bjc/rgens/parser/elements/vars/VRefVariableElement.java b/src/main/java/bjc/rgens/parser/elements/vars/VRefVariableElement.java new file mode 100644 index 0000000..b19f785 --- /dev/null +++ b/src/main/java/bjc/rgens/parser/elements/vars/VRefVariableElement.java @@ -0,0 +1,27 @@ +package bjc.rgens.parser.elements.vars; + +import bjc.rgens.parser.GenerationState; +import bjc.rgens.parser.GrammarException; + +public class VRefVariableElement extends VariableElement { + public final String nam; + + public VRefVariableElement(boolean forbidSpaces, String nam) { + super(forbidSpaces); + + this.nam = nam; + } + + public void generate(GenerationState state) { + if (!state.vars.containsKey(nam)) { + throw new GrammarException(String.format("No variable '%s' defined", nam)); + } + + String strang = state.vars.get(nam); + if(forbidSpaces && strang.contains(" ")) { + throw new GrammarException(String.format("Cannot include variable %s w/ spaces in body in rule name", nam)); + } + + state.contents.append(strang); + } +} diff --git a/src/main/java/bjc/rgens/parser/elements/vars/VariableElement.java b/src/main/java/bjc/rgens/parser/elements/vars/VariableElement.java new file mode 100644 index 0000000..19c1e2c --- /dev/null +++ b/src/main/java/bjc/rgens/parser/elements/vars/VariableElement.java @@ -0,0 +1,71 @@ +package bjc.rgens.parser.elements.vars; + +import bjc.utils.funcutils.StringUtils; + +import bjc.rgens.parser.GenerationState; +import bjc.rgens.parser.GrammarException; + +import java.util.ArrayList; +import java.util.List; + +public abstract class VariableElement { + public boolean forbidSpaces; + + protected VariableElement(boolean forbidSpacing) { + forbidSpaces = forbidSpacing; + } + + public abstract void generate(GenerationState state); + + public static List<VariableElement> parseElementString(String varElm) { + boolean forbidSpaces = StringUtils.levelContains(varElm, "-", "+"); + + String[] parts; + + if(forbidSpaces) { + parts = StringUtils.levelSplit(varElm, true, "-", "+").toArray(new String[0]); + } else { + parts = new String[] { varElm }; + } + + return parseElementString(forbidSpaces, parts); + } + + public static List<VariableElement> parseElementString(boolean forbidSpaces, String... parts) { + List<VariableElement> elms = new ArrayList<>(parts.length); + + VariableElement prevElement = null; + + for (String part : parts) { + VariableElement elm = null; + + if(part.startsWith("$")) { + elm = new VRefVariableElement(forbidSpaces, part.substring(1)); + } else if (part.startsWith("@")) { + if(forbidSpaces) + throw new GrammarException("Arrays references aren't allowed in rule names"); + + elm = new ARefVariableElement(part.substring(1)); + } else if (part.startsWith("%")) { + elm = new RRefVariableElement(forbidSpaces, part.substring(1)); + } else if (part.startsWith("/")) { + throw new GrammarException("Template variables aren't implemented yet"); + } else { + if(prevElement != null && prevElement instanceof LiteralVariableElement) { + /* Aggregate chain literals together */ + ((LiteralVariableElement)prevElement).val += part; + } else { + elm = new LiteralVariableElement(forbidSpaces, part); + } + } + + if(elm != null) { + elms.add(elm); + + prevElement = elm; + } + } + + return elms; + } +} |